CN201639483U - Direct-current (DC) power supply conversion control device and DC power supply - Google Patents
Direct-current (DC) power supply conversion control device and DC power supply Download PDFInfo
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- CN201639483U CN201639483U CN2010201056247U CN201020105624U CN201639483U CN 201639483 U CN201639483 U CN 201639483U CN 2010201056247 U CN2010201056247 U CN 2010201056247U CN 201020105624 U CN201020105624 U CN 201020105624U CN 201639483 U CN201639483 U CN 201639483U
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Abstract
The utility model provides a DC power supply conversion control device and a DC power supply. The DC power supply conversion control device is connected with a DC-DC circuit and controls the DC-DC circuit to carry out power supply conversion; the DC power supply conversion control device comprises a constant-current control unit, a constant-current pulse modulation unit and a constant-current switch driving unit, wherein the constant-current control unit is used for comparing the detected current detection voltage representing the output current of the DC-DC circuit with a preset upper limit voltage and a preset lower limit voltage and outputting a constant-current switch control signal according to a comparing result; the constant-current pulse modulation unit is connected with the constant-current control unit and is used for generating a constant-current pulse modulation signal according to the constant-current switch control signal; and the constant-current switch driving unit controls the switch to be turned on and off according to the constant-current pulse modulation signal. The utility model effectively reduces the ripple waves of the output current of the DC-DC circuit.
Description
Technical field
The utility model belongs to the power source conversion field, relates in particular to a kind of DC power supply conversion control device and DC power supply.
Background technology
Current, increasing portable product adopts the rechargable power supplies power supply, for the use that makes the user more convenient, rechargable power supplies needs the compatible multiple charging modes of energy to adapt to the charging under the different input voltages, as the AC-DC adaptor charge, USB (Universal Serial Bus, USB) charging, even the mutual charging between battery etc.This just requires power circuit that the release (discharge) and the charging of electric quantity of power supply are had good management function, to realize that high efficiency electric weight transforms and stable, safe and reliable voltage output; Under situation about need charge to rechargable power supplies,, use the DC power supply conversion control device to control high efficiency DC-DC mostly constant electric current or constant voltage are provided for prolonging the rechargable power supplies life-span with DC power supply device; And common DC power supply control device, generally by will detect to output current value and the average current value of DC-DC compare by comparator, control the purpose that the switching frequency of power switch among the DC-DC reaches the output constant current with the output result of comparator, this device has no idea output current is controlled with respect to the fluctuating range of average current, can not cause the precision of output current high and ripple is bigger thus.
The utility model content
The utility model is for solving existing DC power supply conversion control device, the problem that current precision is not high and ripple is bigger of control DC-DC output.
For solving problems of the prior art, the utility model discloses a kind of DC power supply conversion control device, described DC power supply conversion control device is connected with a DC-DC circuit, controls described DC-DC circuit and carries out power source conversion; Described DC-DC circuit comprises switch, inductance, first electric capacity, diode; Described DC power supply conversion control device comprises:
The constant current control unit compares with upper voltage limit and the lower voltage limit preset in order to the current detection voltage with the described DC-DC circuit of detected representative output current, and according to comparative result output constant current switch control signal;
The constant-current pulse modulating unit is connected with described constant current control unit, in order to produce the constant current pulse-width signal according to the constant current switch control signal;
The constant current switch driver element is controlled the turn-on and turn-off of described switch according to the constant current pulse-width signal.
Further, described switch is the PMOS pipe, and the grid of described PMOS pipe links to each other with the switch drive unit, and the source electrode of described PMOS pipe links to each other with power supply to be converted, and the drain electrode of described PMOS pipe links to each other with the negative electrode of diode, and the anode of diode links to each other with ground; One end of inductance links to each other with the drain electrode of PMOS pipe, and the other end of inductance is connected with ground through first electric capacity.
Further, the constant current control unit comprises: first differential comparator, first resistance, second resistance, first constant-current source; And second differential comparator, the 3rd resistance, the 4th resistance, second constant-current source; One end of first resistance links to each other with the output of described DC-DC circuit, and an end of the other end one second resistance of first resistance links to each other, and the other end of second resistance connects the inflow current end of first constant-current source, and the current output terminal of first constant-current source is connected with ground; The negative input end of first differential comparator is connected between first resistance and second resistance; The positive input terminal of first differential comparator links to each other with current detecting unit; The output of first differential comparator links to each other with pulse modulation unit; One end of the 3rd resistance links to each other with current detecting unit, and the other end of the 3rd resistance links to each other with an end of the 4th resistance, and the other end of the 4th resistance connects the inflow current end of second constant-current source, and the output current end of second constant-current source is connected with ground; The positive input terminal of second differential comparator links to each other with the output of described DC-DC circuit, and the negative input end of second differential comparator is connected between the 3rd resistance and the 4th resistance, and the output of second differential comparator links to each other with pulse modulation unit.
Further, described DC power supply conversion control device also comprises:
The constant voltage control unit links to each other with the output of DC-DC circuit, compares with the constant voltage threshold voltage of presetting in order to the output voltage with the DC-DC circuit, and produces the constant voltage switch controlling signal according to comparative result;
The constant pressure impulse modulating unit is connected with described constant voltage control unit, in order to produce the constant voltage pulse-width signal according to the constant voltage switch controlling signal;
The turn-on and turn-off of described switch are controlled in constant voltage switch drive unit according to the constant voltage pulse-width signal.
Further, described constant voltage control unit comprises the 3rd differential comparator, the 5th resistance, the 6th resistance; One end of the 5th resistance links to each other with the output of DC-DC circuit, and the other end of the 5th resistance links to each other with ground through the 6th resistance; The positive input terminal of the 3rd differential comparator connects default constant voltage threshold voltage, and the negative input end of the 3rd differential comparator is connected between the 5th resistance and the 6th resistance; The output of the 3rd differential comparator links to each other with the constant pressure impulse modulating unit.
Further, described DC power supply conversion control device also comprises:
Charging control unit in limited time is in order to produce charge switch control signal in limited time;
The charging pulse modulating unit is connected with described charging control unit in limited time in limited time, in order to the pulse-width signal that charges in limited time according to charge switch control signal generation in limited time;
Charge switch driver element is in limited time controlled the turn-on and turn-off of described switch in limited time according to the pulse-width signal that charges.
Further, described charging control unit in limited time comprises the 4th differential comparator, the 3rd constant-current source, second electric capacity; One end of second electric capacity connects the outflow current terminal of the 3rd constant-current source; The positive input terminal of the 4th differential comparator links to each other with the threshold voltage of presetting in limited time, and the negative input end of the 4th differential comparator is connected between the 3rd constant-current source and second electric capacity, and the output of the 4th differential comparator links to each other with the charging pulse modulating unit of prescribing a time limit.
Further, described DC power supply conversion control device also comprises:
The overvoltage control unit links to each other with the output of DC-DC circuit, in order to the output voltage of DC-DC circuit and default overvoltage threshold voltage ratio, and produces the overpressure switch control signal according to comparative result;
The overvoltage pulse modulating unit is connected with described overvoltage control unit, in order to produce the overvoltage pulse-width signal according to the overpressure switch control signal;
The overpressure switch driver element is controlled the turn-on and turn-off of described switch according to the overvoltage pulse-width signal.
Further, described overvoltage control unit comprises the 5th differential comparator, the 7th resistance, the 8th resistance; One end of the 7th resistance links to each other with the output of DC-DC circuit, and the other end of the 7th resistance links to each other with ground through the 8th resistance; The positive input terminal of the 5th differential comparator links to each other with the overvoltage threshold voltage of presetting, and the negative input end of the 5th differential comparator is connected between the 7th resistance and the 8th resistance.
The invention also discloses a kind of DC power supply, comprising:
Current detecting unit is connected with a DC-DC circuit, in order to set up the current detection voltage of representing this DC-DC circuit output current;
The constant current control unit is connected with described current detecting unit, in order to described current detection voltage and default upper voltage limit and lower voltage limit are compared, and according to comparative result output constant current switch control signal;
The constant-current pulse modulating unit is connected with described constant current control unit, in order to produce the constant current pulse-width signal according to the constant current switch control signal;
The constant current switch driver element is controlled the turn-on and turn-off of described switch according to the constant current pulse-width signal.
Disclosed DC power supply conversion control device of the utility model and DC power supply, to represent the current detection voltage of the DC-DC circuit output current of being controlled to compare through constant current control unit and upper voltage limit and the lower voltage limit preset, and according to comparative result output constant current switch control signal; Finally the switching tube break-make is controlled, effectively reduced the ripple of DC-DC circuit output current by constant-current pulse modulating unit, constant current switch driver element.
Description of drawings
Fig. 1 is a kind of DC-DC circuit diagram of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of the utility model embodiment one;
Fig. 3 is the circuit diagram of the utility model embodiment constant current control unit;
Fig. 4 is the circuit theory diagrams of the utility model embodiment two;
Fig. 5 is the circuit diagram of constant voltage control unit among the utility model embodiment two;
Fig. 6 is the circuit theory diagrams of the utility model embodiment three;
Fig. 7 is the circuit diagram of charging control unit in limited time among the utility model embodiment three;
Fig. 8 is the circuit theory diagrams of the utility model embodiment four;
Fig. 9 is the circuit diagram of overvoltage control unit among the utility model embodiment four;
Figure 10 is the circuit diagram of the utility model embodiment five;
Figure 11 is the circuit diagram of the utility model embodiment six.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Embodiment one: a kind of DC power supply conversion control device, and described DC power supply conversion control device is connected with a DC-DC circuit, controls described DC-DC circuit and carries out power source conversion; Described DC-DC circuit comprises switch, inductance, first electric capacity, diode; As shown in Figure 2, the utility model embodiment DC power supply conversion control device comprises:
The constant current control unit compares with upper voltage limit and the lower voltage limit preset in order to the current detection voltage with the described DC-DC circuit of detected representative output current, and according to comparative result output constant current switch control signal;
The constant-current pulse modulating unit is connected with described constant current control unit, in order to produce the constant current pulse-width signal according to the constant current switch control signal;
The constant current switch driver element is controlled the turn-on and turn-off of described switch according to the constant current pulse-width signal.
Fig. 1 be the used buck DC-DC change-over circuit of the utility model embodiment as shown in Figure 1, this DC-DC change-over circuit comprises switch Q, inductance L, first capacitor C 1, diode S, described in the present embodiment switch is the PMOS pipe, the grid of described PMOS pipe connects the DRV signal of its break-make of control, the source electrode of described PMOS pipe is as the input VIN1 of DC-DC circuit, link to each other with power supply VCC to be converted during application, the drain electrode of described PMOS pipe links to each other with the negative electrode of diode S, and the anode of diode links to each other with ground; One end of inductance L links to each other with the drain electrode of PMOS pipe, and the other end of inductance is connected with ground through first capacitor C 1, and the voltage output end of DC-DC circuit is connected between the inductance L and first capacitor C 1, in order to output voltage signal VOUT; When the DC-DC circuit is controlled, feed back the current detection voltage VSENS that represents its output current with current detecting unit usually.
The utility model embodiment one to six all elaborates at the control of buck DC-DC circuit, but the utility model is not limited to the buck DC-DC circuit, those skilled in the art also can be applied to the boost DC-DC circuit, because of buck DC-DC circuit known by those skilled in the art, and comparatively similar based on control of the present utility model, do not do at this and to give unnecessary details.
As shown in Figure 3: the constant current control unit comprises: the first differential comparator ICOMP_V, first resistance R 1, second resistance R 2, the first constant-current source I1; And the second differential comparator ICOMP_P, the 3rd resistance R 3, the 4th resistance R 4, the second constant-current source I2; One end of first resistance links to each other with the output of described DC-DC circuit, and an end of the other end one second resistance of first resistance links to each other, and the other end of second resistance connects the inflow current end of first constant-current source, and the outflow current terminal of first constant-current source is connected with ground; The negative input end of first differential comparator is connected between first resistance and second resistance; The positive input terminal of first differential comparator links to each other with current detecting unit; The output of first differential comparator links to each other with pulse modulation unit; One end of the 3rd resistance links to each other with current detecting unit, and the other end of the 3rd resistance links to each other with an end of the 4th resistance, and the other end of the 4th resistance connects the inflow current end of second constant-current source, and the outflow current terminal of second constant-current source is connected with ground; The positive input terminal of second differential comparator links to each other with the output of described DC-DC circuit, and the negative input end of second differential comparator is connected between the 3rd resistance and the 4th resistance, and the output of second differential comparator links to each other with pulse modulation unit.
The first differential comparator ICOMP_V detects charging current and reduces to down in limited time, and control logic is partly opened switching tube and charged.When detecting electric current, the second differential comparator ICOMP_P rises in limited time, control logic part off switch pipe, and S provides afterflow by diode.So just control the charging peak value and the discharge valley of charging current, thereby realized constant current charge.
Embodiment two: as shown in Figure 4, the utility model embodiment DC power supply conversion control device also comprises:
The constant voltage control unit links to each other with the output of DC-DC circuit, compares with the constant voltage threshold voltage of presetting in order to the output voltage with the DC-DC circuit, and produces the constant voltage switch controlling signal according to comparative result;
The constant pressure impulse modulating unit is connected with described constant voltage control unit, in order to produce the constant voltage pulse-width signal according to the constant voltage switch controlling signal;
The turn-on and turn-off of described switch are controlled in constant voltage switch drive unit according to the constant voltage pulse-width signal.
As shown in Figure 5, described constant voltage control unit comprises the 3rd differential comparator VCOMP, the 5th resistance R 5, the 6th resistance R 6; One end of the 5th resistance links to each other with the output of DC-DC circuit, and the other end of the 5th resistance links to each other with ground through the 6th resistance; The positive input terminal of the 3rd differential comparator connects default constant voltage threshold voltage VREFA, and the negative input end of the 3rd differential comparator is connected between the 5th resistance and the 6th resistance; The output of the 3rd differential comparator links to each other with the constant pressure impulse modulating unit.Reduce when VCOMP detects output voltage, begin to open switching tube and charge.
Embodiment three: as shown in Figure 6, the utility model embodiment DC power supply conversion control device also comprises:
Charging control unit in limited time is in order to produce charge switch control signal in limited time;
The charging pulse modulating unit is connected with described charging control unit in limited time in limited time, in order to the pulse-width signal that charges in limited time according to charge switch control signal generation in limited time;
Charge switch driver element is in limited time controlled the turn-on and turn-off of described switch in limited time according to the pulse-width signal that charges.
As shown in Figure 7, described charging control unit in limited time comprises the 4th differential comparator PLS_ON, the 3rd constant-current source I3, second capacitor C 2; One end of second electric capacity connects the outflow current terminal of the 3rd constant-current source; The positive input terminal of the 4th differential comparator links to each other with the threshold voltage of presetting in limited time, and the negative input end of the 4th differential comparator is connected between the 3rd constant-current source and second electric capacity, and the output of the 4th differential comparator links to each other with the charging pulse modulating unit of prescribing a time limit.Open back control system constant-current source when switching tube and produce one road electric current second electric capacity is charged, when charging voltage reaches design load VREFB, provide the signal of charging end, logical gate receives signal, the off switch pipe.
Embodiment four: as shown in Figure 8, the utility model embodiment DC power supply conversion control device also comprises:
The overvoltage control unit links to each other with the output of DC-DC circuit, in order to the output voltage of DC-DC circuit and default overvoltage threshold voltage ratio, and produces the overpressure switch control signal according to comparative result;
The overvoltage pulse modulating unit is connected with described overvoltage control unit, in order to produce the overvoltage pulse-width signal according to the overpressure switch control signal;
The overpressure switch driver element is controlled the turn-on and turn-off of described switch according to the overvoltage pulse-width signal.
As shown in Figure 9, described overvoltage control unit comprises the 5th differential comparator OV, the 7th resistance R 7, the 8th resistance R 8; One end of the 7th resistance links to each other with the output of DC-DC circuit, and the other end of the 7th resistance links to each other with ground through the 8th resistance; The positive input terminal of the 5th differential comparator links to each other with the overvoltage threshold voltage VREFC that presets, and the negative input end of the 5th differential comparator is connected between the 7th resistance and the 8th resistance.When the 5th differential comparator judges that output voltage surpasses default overvoltage threshold voltage time control switch pipe and turn-offs.
Embodiment five: the 5th embodiment of the present utility model is used in combination for first to fourth embodiment's, as shown in figure 10: the 5th embodiment with the output of first differential comparator and the 3rd differential comparator be connected respectively logic sum gate T1 two inputs carry out exclusive disjunction, or door T1 output connects the first input end of logical operation module; Three inputs that the output of second differential comparator, the 4th differential comparator and the 5th differential comparator connects NOR gate T2 respectively carry out NOR-operation, and the output of not gate T2 connects second input of logical operation module RS; Or the output result of door T1 and NOR gate T2, the break-make of direct control switch pipe after the logical operation module computing, as can be seen, or door T1 and NOR gate T2 and logical operation module RS realized the function of embodiment one to four each pulse modulation unit and switch drive unit.
Embodiment six: the 6th embodiment of the present utility model is the DC power supply that constitutes in conjunction with the DC-DC circuit according to the 5th embodiment, vehicle power control IC among the figure is the chip form of embodiment five disclosed DC power supply conversion control devices, comprises pin VIN, GND, output voltage feedback end VOUT, current detection voltage feedback end VSEN, index signal output ON_light, switching drive signal output DRV; On the basis of embodiment five, increased peripheral circuit, pin VIN input welding system power supply VCC, between the pin VIN of delay capacitor C3 connection and power supply VCC and vehicle power control IC, GND is connected with ground, the input that switch drive pin DRV connects the DC-DC circuit is the grid of PMOS pipe, be in series with detection resistance R _ sen between the DC-DC circuit inductance L and first capacitor C 1, resistance R _ sen is near a termination pin Vsen of inductance, the output termination output voltage feedback end VOUT of DC-DC circuit.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (10)
1. DC power supply conversion control device, described DC power supply conversion control device is connected with a DC-DC circuit, controls described DC-DC circuit and carries out power source conversion; Described DC-DC circuit comprises switch, inductance, first electric capacity, diode; It is characterized in that: described DC power supply conversion control device comprises:
The constant current control unit compares with upper voltage limit and the lower voltage limit preset in order to the current detection voltage with the described DC-DC circuit of detected representative output current, and according to comparative result output constant current switch control signal;
The constant-current pulse modulating unit is connected with described constant current control unit, in order to produce the constant current pulse-width signal according to the constant current switch control signal;
The constant current switch driver element is controlled the turn-on and turn-off of described switch according to the constant current pulse-width signal.
2. DC power supply conversion control device according to claim 1, it is characterized in that: described switch is the PMOS pipe, the grid of described PMOS pipe links to each other with the switch drive unit, the source electrode of described PMOS pipe links to each other with power supply to be converted, the drain electrode of described PMOS pipe links to each other with the negative electrode of diode, and the anode of diode links to each other with ground; One end of inductance links to each other with the drain electrode of PMOS pipe, and the other end of inductance is connected with ground through first electric capacity.
3. DC power supply conversion control device according to claim 1 is characterized in that: the constant current control unit comprises: first differential comparator, first resistance, second resistance, first constant-current source; And second differential comparator, the 3rd resistance, the 4th resistance, second constant-current source; One end of first resistance links to each other with the output of described DC-DC circuit, and an end of the other end one second resistance of first resistance links to each other, and the other end of second resistance connects the inflow current end of first constant-current source, and the outflow current terminal of first constant-current source is connected with ground; The negative input end of first differential comparator is connected between first resistance and second resistance; The positive input terminal of first differential comparator links to each other with current detecting unit; The output of first differential comparator links to each other with pulse modulation unit; One end of the 3rd resistance links to each other with current detecting unit, and the other end of the 3rd resistance links to each other with an end of the 4th resistance, and the other end of the 4th resistance connects the inflow current end of second constant-current source, and the outflow current terminal of second constant-current source is connected with ground; The positive input terminal of second differential comparator links to each other with the output of described DC-DC circuit, and the negative input end of second differential comparator is connected between the 3rd resistance and the 4th resistance, and the output of second differential comparator links to each other with the constant-current pulse modulating unit.
4. DC power supply conversion control device according to claim 1 is characterized in that: also comprise:
The constant voltage control unit links to each other with the output of DC-DC circuit, compares with the constant voltage threshold voltage of presetting in order to the output voltage with the DC-DC circuit, and produces the constant voltage switch controlling signal according to comparative result;
The constant pressure impulse modulating unit is connected with described constant voltage control unit, in order to produce the constant voltage pulse-width signal according to the constant voltage switch controlling signal;
The turn-on and turn-off of described switch are controlled in constant voltage switch drive unit according to the constant voltage pulse-width signal.
5. DC power supply conversion control device according to claim 4 is characterized in that: described constant voltage control unit comprises: the 3rd differential comparator, the 5th resistance, the 6th resistance; One end of the 5th resistance links to each other with the output of DC-DC circuit, and the other end of the 5th resistance links to each other with ground through the 6th resistance; The positive input terminal of the 3rd differential comparator connects default constant voltage threshold voltage, and the negative input end of the 3rd differential comparator is connected between the 5th resistance and the 6th resistance; The output of the 3rd differential comparator links to each other with the constant pressure impulse modulating unit.
6. DC power supply conversion control device according to claim 1 is characterized in that: also comprise:
Charging control unit in limited time is in order to produce charge switch control signal in limited time;
The charging pulse modulating unit is connected with described charging control unit in limited time in limited time, in order to the pulse-width signal that charges in limited time according to charge switch control signal generation in limited time;
Charge switch driver element is in limited time controlled the turn-on and turn-off of described switch in limited time according to the pulse-width signal that charges.
7. DC power supply conversion control device according to claim 6 is characterized in that: described charging control unit in limited time comprises: the 4th differential comparator, the 3rd constant-current source, second electric capacity; One end of second electric capacity connects the outflow current terminal of the 3rd constant-current source; The positive input terminal of the 4th differential comparator links to each other with the threshold voltage of presetting in limited time, and the negative input end of the 4th differential comparator is connected between the 3rd constant-current source and second electric capacity, and the output of the 4th differential comparator links to each other with the charging pulse modulating unit of prescribing a time limit.
8. DC power supply conversion control device according to claim 1 is characterized in that: also comprise:
The overvoltage control unit links to each other with the output of DC-DC circuit, in order to the output voltage of DC-DC circuit and default overvoltage threshold voltage ratio, and produces the overpressure switch control signal according to comparative result;
The overvoltage pulse modulating unit is connected with described overvoltage control unit, in order to produce the overvoltage pulse-width signal according to the overpressure switch control signal;
The overpressure switch driver element is controlled the turn-on and turn-off of described switch according to the overvoltage pulse-width signal.
9. DC power supply conversion control device according to claim 8 is characterized in that: described overvoltage control unit comprises: the 5th differential comparator, the 7th resistance, the 8th resistance; One end of the 7th resistance links to each other with the output of DC-DC circuit, and the other end of the 7th resistance links to each other with ground through the 8th resistance; The positive input terminal of the 5th differential comparator links to each other with the overvoltage threshold voltage of presetting, and the negative input end of the 5th differential comparator is connected between the 7th resistance and the 8th resistance.
10. DC power supply is characterized in that: comprising:
Current detecting unit is connected with a DC-DC circuit, in order to set up the current detection voltage of representing this DC-DC circuit output current;
The constant current control unit is connected with described current detecting unit, in order to described current detection voltage and default upper voltage limit and lower voltage limit are compared, and according to comparative result output constant current switch control signal;
The constant-current pulse modulating unit is connected with described constant current control unit, in order to produce the constant current pulse-width signal according to the constant current switch control signal;
The constant current switch driver element is controlled the turn-on and turn-off of described switch according to the constant current pulse-width signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201056247U CN201639483U (en) | 2010-01-27 | 2010-01-27 | Direct-current (DC) power supply conversion control device and DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201056247U CN201639483U (en) | 2010-01-27 | 2010-01-27 | Direct-current (DC) power supply conversion control device and DC power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201639483U true CN201639483U (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201056247U Expired - Lifetime CN201639483U (en) | 2010-01-27 | 2010-01-27 | Direct-current (DC) power supply conversion control device and DC power supply |
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| CN (1) | CN201639483U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904305A (en) * | 2011-12-15 | 2013-01-30 | 无锡中星微电子有限公司 | Charging management circuit in constant current charging mode |
| CN103220859A (en) * | 2013-04-12 | 2013-07-24 | 深圳市明微电子股份有限公司 | Constant-current control circuit and device with same |
-
2010
- 2010-01-27 CN CN2010201056247U patent/CN201639483U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904305A (en) * | 2011-12-15 | 2013-01-30 | 无锡中星微电子有限公司 | Charging management circuit in constant current charging mode |
| CN102904305B (en) * | 2011-12-15 | 2014-09-17 | 无锡中星微电子有限公司 | Charging management circuit in constant current charging mode |
| CN103220859A (en) * | 2013-04-12 | 2013-07-24 | 深圳市明微电子股份有限公司 | Constant-current control circuit and device with same |
| CN103220859B (en) * | 2013-04-12 | 2016-08-10 | 深圳市明微电子股份有限公司 | Constant-current control circuit and use the device of this circuit |
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