CN217160069U - LED power supply driving system with two-way output - Google Patents
LED power supply driving system with two-way output Download PDFInfo
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- CN217160069U CN217160069U CN202123315287.1U CN202123315287U CN217160069U CN 217160069 U CN217160069 U CN 217160069U CN 202123315287 U CN202123315287 U CN 202123315287U CN 217160069 U CN217160069 U CN 217160069U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a LED power driving system with two way outputs, this system of its characterized in that includes: transformer, 12V constant voltage module and 5V synchronous rectification module, input back 220V commercial power changes into the input of direct current electricity connection transformer through the rectifier bridge, transformer output 12V voltage to 12V constant voltage module and 5V synchronous rectification module's input, 12V constant voltage module output 12V constant voltage power supply, 5V synchronous rectification module can be 5V constant voltage power supply output with 12V voltage synchronous rectification. Use the utility model discloses the loss of circuit is little, and is efficient, and is small and with low costs, can effectually be the cost-effective of drive power supply manufacturing enterprise, the benefit is improved.
Description
Technical Field
The utility model relates to a drive power supply both ends circuit design field specifically is a LED power driving system with two tunnel outputs.
Background
Various LED lighting lamps are available in the market, and the lamps have the functions of five-door and eight-door, and the driving power supply is used for realizing the functions. Different driving power supply circuits have different design ideas, loss can be caused in the circuit in the process of designing and realizing the ideas, and how to reduce or avoid the loss is to improve the efficiency, so that the problem which needs to be solved by power supply design engineers is solved urgently. Among the many circuits, a two-terminal output circuit (12V/5V) connected after a transformer is frequently used.
The two-end output circuit (12V/5V) commonly used in the market at present mainly comprises the following 2 types:
1. two paths of output (as shown in fig. 1) are connected behind the secondary winding of the transformer, wherein one path of output voltage is 12V, the other path of output voltage is 5V, and the 5V output circuit is further connected with a voltage stabilizing source 431 to realize voltage stabilization. When one way is full and the other way is light, for example, 12V is full and 5V is full, one way is light, in this case, the current of the 5V circuit may be overloaded, and vice versa. And two paths of current under the condition that the 12V circuit and the 5V circuit are simultaneously fully loaded can be overloaded, so that the realization of the circuit function can be influenced. Precise control of the two outputs is difficult to achieve with this design.
2. The output is only connected to one output after the secondary winding of the transformer, and the output is divided into two paths (as shown in fig. 2). One of the two outputs is 12V, and the other output is reduced to 5V by a DC-DCBuck circuit. The method needs large inductance, large volume, large loss and low efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the problem that exists among the background art, provided a LED power driving system with two way outputs.
The technical scheme of the utility model is that:
an LED power driving system having two outputs, the system comprising: the transformer outputs 12V voltage to the input ends of the 12V constant voltage module and the 5V synchronous rectification module, the 12V constant voltage module outputs 12V constant voltage power supply, and the 5V synchronous rectification module can synchronously rectify the 12V voltage into 5V constant voltage power supply output;
wherein: the 5V synchronous rectification module comprises a synchronous voltage reduction chip, an inductor L1, a capacitor C1, a capacitor C4, Cin and Cout, and resistors R1 and R2;
an input pin IN of the synchronous voltage reduction chip is connected with an energy starting pin EN, and the input end of the synchronous voltage reduction chip is connected with 12V voltage output by a transformer and is marked as VIN; a capacitor C1 is connected between a bootstrap band pin BS and an output pin LX of the synchronous buck chip, the connection point of the output pin LX of the synchronous buck chip and the capacitor C1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a resistor R1, the other end of a resistor R1 is connected with a resistor R2 in series and then is grounded, the connection point of the resistor R1 and the resistor R2 is connected with a feedback pin FB of the synchronous buck chip, two ends of the resistor R1 are connected with a capacitor C4 in parallel, and a GND pin of the synchronous buck chip is grounded;
the connection point of the inductor L1 and the resistor R1 is used as a voltage output end of the 5V synchronous rectification module and is marked as Vout;
the input end Vin and the output end Vout of the 5V synchronous rectification module are respectively grounded through the bypass of the capacitor Cin and the capacitor Cout.
Furthermore, the capacitance Cin is more than or equal to 1 uf.
Further, the capacitance C 1 ≥0.1uf。
Further, the model of the synchronous buck chip is SY 8113B.
The beneficial effects of the utility model
The utility model discloses a circuit can export two way supply voltage, and the loss is little, and is efficient, and is small and with low costs, can effectually be the cost-effective of drive power supply manufacturing enterprise, the benefit of improvement. Compared with the traditional scheme 1 in the background technology, the two paths of outputs are independent from each other, the realization of the states of the two paths of outputs cannot be influenced, and the loss is small; compared with the traditional scheme 2 in the background art, the circuit structure is simple, the number of electronic components is small, the size of the energy storage inductor is small, the overall size of the device is reduced, and the cost is greatly reduced.
The utility model discloses a synchronous step-down chip, inside is from taking rectifier module, Vin input 12V voltage after transformer vary voltage, the EN foot continuously receives high frequency signal, at L1 inductance stored energy, after R1, R2 resistance partial pressure, the accurate 5V voltage of FB foot induction, synchronous step-down chip inside can the automated inspection constant power, can automatic adjustment when overpower or low-power, make output voltage Vout remain at 5V all the time.
Drawings
FIG. 1 is a schematic block diagram of the present invention
Fig. 2 is a circuit diagram of the 5V synchronous rectification module of the present invention.
Fig. 3 is a block diagram of a 1 st two-terminal output circuit in the prior art.
Fig. 4 is a block diagram of a 2 nd two-terminal output circuit in the prior art.
Detailed Description
The present invention will be further explained with reference to the following examples, but the scope of the present invention is not limited thereto:
as shown in fig. 1 and 2, an LED power driving system with two outputs includes: the transformer outputs 12V voltage to the input ends of the 12V constant voltage module and the 5V synchronous rectification module, the 12V constant voltage module outputs 12V constant voltage power supply, and the 5V synchronous rectification module can synchronously rectify the 12V voltage into 5V constant voltage power supply output;
wherein: the 5V synchronous rectification module comprises a synchronous voltage reduction chip, an inductor L1, a capacitor C1, a capacitor C4, Cin and Cout, and resistors R1 and R2;
an input pin IN of the synchronous voltage reduction chip is connected with an energy starting pin EN, and the input end of the synchronous voltage reduction chip is connected with 12V voltage output by a transformer and is marked as VIN; a capacitor C1 is connected between a bootstrap band pin BS and an output pin LX of the synchronous buck chip, the connection point of the output pin LX of the synchronous buck chip and the capacitor C1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a resistor R1, the other end of a resistor R1 is connected with a resistor R2 in series and then is grounded, the connection point of the resistor R1 and the resistor R2 is connected with a feedback pin FB of the synchronous buck chip, two ends of the resistor R1 are connected with a capacitor C4 in parallel, and a GND pin of the synchronous buck chip is grounded;
the connection point of the inductor L1 and the resistor R1 is used as a voltage output end of the 5V synchronous rectification module and is marked as Vout;
the input end Vin and the output end Vout of the 5V synchronous rectification module are respectively grounded through the bypass of the capacitor Cin and the capacitor Cout.
In the embodiment, the circuit can output two paths of power supply voltages, has the advantages of low loss, high efficiency, small size and low cost, and can effectively save cost and improve benefits for driving power supply production enterprises. Compared with the traditional scheme 1 in the background technology, the two paths of outputs are independent from each other, the realization of the states of the two paths of outputs cannot be influenced, and the loss is small; compared with the traditional scheme 2 in the background art, the circuit structure is simple, the number of electronic components is small, the overall size of the device is reduced, and the cost is greatly reduced.
Further, the capacitance Cin is more than or equal to 1 uf; the capacitor C 1 ≥0.1uf。
Further, the model of the synchronous buck chip is SY 8113B.
The utility model discloses a synchronous step-down chip, inside is from taking rectifier module, Vin input 12V voltage after transformer vary voltage, the EN foot continuously receives high frequency signal, at L1 inductance stored energy, after R1, R2 resistance partial pressure, the accurate 5V voltage of FB foot induction, synchronous step-down chip inside can the automated inspection constant power, can automatic adjustment when overpower or low-power, make output voltage Vout remain at 5V all the time.
The circuit structure uses the synchronous rectification chip to realize synchronous rectification, reduces loss, and uses small energy storage inductor, thereby realizing small size.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (4)
1. An LED power driving system with two-way output, characterized in that the system comprises: the transformer outputs 12V voltage to the input ends of the 12V constant voltage module and the 5V synchronous rectification module, the 12V constant voltage module outputs 12V constant voltage power supply, and the 5V synchronous rectification module can synchronously rectify the 12V voltage into 5V constant voltage power supply output;
wherein: the 5V synchronous rectification module comprises a synchronous voltage reduction chip, an inductor L1, a capacitor C1, a capacitor C4, Cin and Cout, and resistors R1 and R2;
an input pin IN of the synchronous voltage reduction chip is connected with an energy starting pin EN, and the input end of the synchronous voltage reduction chip is connected with 12V voltage output by a transformer and is marked as VIN; a capacitor C1 is connected between a bootstrap band pin BS and an output pin LX of the synchronous buck chip, the connection point of the output pin LX of the synchronous buck chip and the capacitor C1 is connected with one end of an inductor L1, the other end of the inductor L1 is connected with one end of a resistor R1, the other end of a resistor R1 is connected with a resistor R2 in series and then is grounded, the connection point of the resistor R1 and the resistor R2 is connected with a feedback pin FB of the synchronous buck chip, two ends of the resistor R1 are connected with a capacitor C4 in parallel, and a GND pin of the synchronous buck chip is grounded;
the connection point of the inductor L1 and the resistor R1 is used as a voltage output end of the 5V synchronous rectification module and is marked as Vout;
the input end Vin and the output end Vout of the 5V synchronous rectification module are respectively grounded through the bypass of the capacitor Cin and the capacitor Cout.
2. The LED power supply driving system with two-way output according to claim 1, wherein the capacitor Cin is greater than or equal to 1 uf.
3. The LED power driving system with two-way output according to claim 1, wherein the capacitor C is connected to the output of the LED power driving system 1 ≥0.1uf。
4. The LED power driving system with two-way output according to claim 1, wherein the type of the synchronous buck chip is SY 8113B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123315287.1U CN217160069U (en) | 2021-12-27 | 2021-12-27 | LED power supply driving system with two-way output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123315287.1U CN217160069U (en) | 2021-12-27 | 2021-12-27 | LED power supply driving system with two-way output |
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| Publication Number | Publication Date |
|---|---|
| CN217160069U true CN217160069U (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123315287.1U Expired - Fee Related CN217160069U (en) | 2021-12-27 | 2021-12-27 | LED power supply driving system with two-way output |
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| Country | Link |
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| CN (1) | CN217160069U (en) |
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2021
- 2021-12-27 CN CN202123315287.1U patent/CN217160069U/en not_active Expired - Fee Related
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Granted publication date: 20220809 |