CN207530713U - A kind of super low-power consumption DC-DC power module - Google Patents
A kind of super low-power consumption DC-DC power module Download PDFInfo
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- CN207530713U CN207530713U CN201720990842.5U CN201720990842U CN207530713U CN 207530713 U CN207530713 U CN 207530713U CN 201720990842 U CN201720990842 U CN 201720990842U CN 207530713 U CN207530713 U CN 207530713U
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- circuit
- pwm controller
- power
- power module
- photoelectrical coupler
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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 kind of super low-power consumption DC/DC power modules; including PWM controller, the super low-power consumption DC DC power modules further include transformer, master power switch pipe, sample circuit, feedback power supply circuit, sampling current-limiting circuit, the first photoelectrical coupler, the second photoelectrical coupler, rectifier diode, LC filter circuits, feedback and protection circuit.The utility model realizes the performance requirement of high input voltage super-low standby power consumption, has the features such as idling consumption is small, and interchangeability is strong, efficient, small, and reliability is high, so as to meet to high pressure DC/DC power supplys miniaturization low-power consumption, efficient application requirements.
Description
Technical field
The utility model is specifically related to a kind of super low-power consumption DC-DC power module, belongs to DC/DC power modules technology neck
Domain.
Background technology
Power module realizes that the core of low-power consumption is PWM controller, its performance directly decides the work of power module
State, using traditional PWM controller, working frequency be substantially it is fixed, not according to loading condition adjust automatically
Function, the quantity of component is more needed for outside, and of high cost, volume is big, EMI poor performances, with present International Electro component
Green energy conservation wants the trend of the miniaturization of summation device, and traditional PWM controller is difficult to adapt to the demand in market, so with green
PWM controller, the miniaturization integrated power supply module of color pattern are widely used.
The working frequency of traditional PWM controller cannot according to the variation of load adjust automatically, be in power supply mould by it
At light load, whole efficiency is very low for block, and idling consumption is also very big, and volume is big, EMI poor performances, and reliability is low.
Utility model content
Therefore, the utility model aim is to provide a kind of PWM controller using high pressure green model, its working frequency
It can be according to the load-carrying situation adjust automatically working frequency of power module（Working frequency representative value is 100kHz）, make module whole
Make to remain very high efficiency, and idling consumption maximum is also only 0.2W eventually, reducing external required component number
While also reduce cost, improve the reliability of power module.Power module carries mounting hole, and input terminal and output terminal are
Draw pin mode can directly insert pcb board and use and install fixed use.
Technical solution is used by the utility model solves its technical problem：
Super low-power consumption DC-DC power module, including PWM controller, the super low-power consumption DC-DC power module further includes change
Depressor, master power switch pipe, sample circuit, feedback power supply circuit, sampling current-limiting circuit, the first photoelectrical coupler, the second photoelectricity
Coupler, rectifier diode, LC filter circuits, feedback and protection circuit.
Further, power module input positive terminal is connected by start-up circuit with the HV ends of PWM controller, and power module is defeated
Enter anode with the first head of primary to be connected, drain electrode of the tail head through overprotection circuit Yu master power switch pipe of primary
It is connected, the grid of master power switch pipe is connected with the OUT terminal of PWM controller, and the source electrode of master power switch pipe passes through sample circuit
It is connected to the ground, the VCC ends of PWM controller are connected with feedback power supply circuit；The GND ends of PWM controller are connected with ground terminal, PWM controls
The CS ends of device processed are connected with sampling current-limiting circuit, and the COMP ends of PWM controller are connected with the collector of the first photoelectrical coupler；
The OTP ends of PWM controller are connected with the collector of the second photoelectrical coupler；The tail head of transformer secondary output and the sun of rectifier diode
Pole is connected, and rectifier diode cathode is connected with LC filter circuits, and LC filter circuits are connected with output terminal and with feeding back and protecting
The input terminal of circuit is connected, and feeds back and protect the output terminal of circuit to distinguish by the first photoelectrical coupler, the second photoelectrical coupler
It is connected with the OTP ends of PWM controller and COMP ends.
Further, the PWM controller model LD7750BGR.
Further, the power module height is 13 millimeters.
Further, the power module carries mounting hole, and input terminal and output terminal are draw pin mode.
The beneficial effects of the utility model are：A kind of super low-power consumption DC-DC power module of the utility model, it is and existing
Technology is compared and is had the following advantages：
1st, power module whole height is 13 millimeters, meets low back trend, is had small, light-weight, at low cost, mutual
The features such as transsexual strong；
2nd, the no-load loss of power module is very small, and maximum is no more than 0.2W, and loading efficiency reaches as high as 90%；
3rd, power module is integrated design method, is controlled by PWM green models, and switching frequency can be according to negative
The variation of load and adjust automatically（0-100kHz of frequency adjustment range ± 6kHz）Also EMI characteristics are further optimized；
4th, power module input and output are isolation method, and isolation voltage is up to AC1500V and without breakdown and spark phenomenon；
5th, standardization, tandem product design, are suitable for the low power parameter request of high input voltage, adaptability is wider, property
It can be more excellent.
Description of the drawings
Fig. 1 is power module outline dimensional drawing.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is power module circuit schematic.
Specific embodiment
Specific embodiment of the present utility model is illustrated below in conjunction with the accompanying drawings：
The utility model adopts the following technical solution：
PWM controller of the power module by the high pressure green model with frequency function of exchange, high pressure DC/DC converter work(
Rate circuit, output filter circuit and the integrated composition of shell,
The designing scheme of traditional PWM controller is broken through, is designed using the PWM controller of high pressure green model, makes its
Working frequency can be according to the load-carrying situation adjust automatically working frequency of power module（Working frequency representative value is 100kHz）, make
Module integrally makes to remain very high efficiency, and idling consumption very little eventually, and component needed for outside is rare conducive to integrated
Structure design.
Transformer uses the better three layer insulation wire coiling of insulation performance, and coiling sequence is using primary, secondary, primary, secondary
Grade, feedback, primary sequence coiling while isolation pressure resistance is ensured, also ensure the abundant coupling of transformer, with reference to PWM's
Frequency conversion function greatly improves the whole EMI performances of module.
Shell mechanism uses plastic shell, is glued with power bottom plate and mode, reaches integral structure, have it is light-weight, into
The features such as this is low.
As shown in Figure 1 and Figure 2, power module schematic diagram is as shown in Figure 3 for its outline dimensional drawing.
Power module employs the circuit of reversed excitation design that circuit is simple, reliability is high, wherein with frequency function of exchange
The PWM controller U1 of high pressure green model（Model：LD7750BGR）It is to realize the efficient core of super low-power consumption, power module
Input positive terminal passes through start-up circuit and 7 feet of U1（HV ends）It is connected, while input positive terminal is connected with the first head of primary, warp
Overprotection circuit is connected with the drain electrode of the tail head and master power switch pipe Q1 of primary, the grid of Q1 and 5 feet of U1（OUT
End）It is connected, the source electrode of Q1 is connected to the ground by sample circuit, 6 feet of U1（VCC ends）It is connected with feedback power supply circuit；4 feet of U1
（GND ends）It is connected with ground terminal, 3 feet of U1（CS ends）It is connected with sampling current-limiting circuit, 2 feet of U1（COMP ends）With photoelectrical coupler
The collector of U2 is connected；1 foot of U1（OTP ends）It is connected with the collector of photoelectrical coupler U4；The tail head of main transformer secondary with
The anode of rectifier diode D9 is connected, rectifying tube D9 cathodes with output LC filter circuits be connected, the LC filter circuits of output with
Output terminal is connected while is also connected with the input terminal for feeding back and protecting circuit, feeds back and protect the output terminal U4 and U2 of circuit to pass through
Optocoupler is connected to be controlled and adjusted with the 1 foot OTP ends of PWM controller U1 and 2 foot COMP ends respectively.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
For personnel, under the premise of principle described in the utility model is not departed from, several improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (1)
- A kind of 1. super low-power consumption DC-DC power module, including PWM controller, which is characterized in that the super low-power consumption DC-DC electricity Source module further includes transformer, master power switch pipe, sample circuit, feedback power supply circuit, sampling current-limiting circuit, the first photoelectricity coupling Clutch, the second photoelectrical coupler, rectifier diode, LC filter circuits, feedback and protection circuit；Power module input positive terminal is connected by start-up circuit with the HV ends of PWM controller, power module input positive terminal and transformation The first head of device primary is connected, and the tail head of primary is connected through overprotection circuit with the drain electrode of master power switch pipe, main power The grid of switching tube is connected with the OUT terminal of PWM controller, and the source electrode of master power switch pipe is connected to the ground by sample circuit, PWM The VCC ends of controller are connected with feedback power supply circuit；The GND ends of PWM controller are connected with ground terminal, the CS ends of PWM controller with Sampling current-limiting circuit is connected, and the COMP ends of PWM controller are connected with the collector of the first photoelectrical coupler；The OTP of PWM controller End is connected with the collector of the second photoelectrical coupler；The tail head of transformer secondary output is connected with the anode of rectifier diode, rectification Diode cathode is connected with LC filter circuits, and LC filter circuits are connected with output terminal and the input terminal with feeding back and protecting circuit Be connected, feedback and protection circuit output terminal by the first photoelectrical coupler, the second photoelectrical coupler respectively with PWM controller OTP ends are connected with COMP ends；The PWM controller model LD7750BGR；The power module height is 13 millimeters；The power module carries mounting hole, and input terminal and output terminal are draw pin mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720990842.5U CN207530713U (en) | 2017-08-09 | 2017-08-09 | A kind of super low-power consumption DC-DC power module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720990842.5U CN207530713U (en) | 2017-08-09 | 2017-08-09 | A kind of super low-power consumption DC-DC power module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207530713U true CN207530713U (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720990842.5U Active CN207530713U (en) | 2017-08-09 | 2017-08-09 | A kind of super low-power consumption DC-DC power module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021253457A1 (en) * | 2020-06-20 | 2021-12-23 | 华为技术有限公司 | Apparatus for converting direct-current voltage, and electronic device |
-
2017
- 2017-08-09 CN CN201720990842.5U patent/CN207530713U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021253457A1 (en) * | 2020-06-20 | 2021-12-23 | 华为技术有限公司 | Apparatus for converting direct-current voltage, and electronic device |
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