CN206099754U - Wide input voltage range's auxiliary source circuit - Google Patents
Wide input voltage range's auxiliary source circuit Download PDFInfo
- Publication number
- CN206099754U CN206099754U CN201621098647.3U CN201621098647U CN206099754U CN 206099754 U CN206099754 U CN 206099754U CN 201621098647 U CN201621098647 U CN 201621098647U CN 206099754 U CN206099754 U CN 206099754U
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- input voltage
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Abstract
The utility model discloses a wide input voltage range's auxiliary source circuit, it includes synchronous step -down type stabiliser, the VIN pin and GND pin of synchronous step -down type stabiliser, VIN pin and RUN pin, RUN pin and OVLO pin, OVLO pin and GND pin, SS pin and GND pin, ISET pin and GND pin, connect first electric capacity between VFB pin and the GND pin respectively, first resistance, the vehicle charging control system further comprises a second resistor, third resistance, third electric capacity, fourth resistance, the 6th resistance, first inductance one end links to each other with the SW pin of synchronous step -down type stabiliser, the other end links to each other with the output of circuit, second electric capacity has been connect between the output of circuit and the GND pin of synchronous step -down type stabiliser. The utility model discloses have the wide output voltage range of wide input voltage range, adjustable, only need few peripheral device, effectively improve the reliability and the volume that reduces power module.
Description
Technical field
The utility model is related to technical field of direct current power, more particularly, to a kind of auxiliary source electricity of wide input voltage range
Road.
Background technology
In power module, it is often necessary to use auxiliary source power supply circuits, to guarantee that power good works.Supplied using auxiliary source
Electricity can be effectively reduced the power consumption of control circuit, the stability of strengthening system.Traditional auxiliary source circuit complex structure, device
More, less efficient, ripple is higher.
The content of the invention
To solve the above problems, the purpose of this utility model is to provide a kind of auxiliary source circuit of wide input voltage range,
It only needs few peripheral components, can effectively improve reliability and reduce the volume of power module.
For achieving the above object, the utility model is adopted the following technical scheme that：
A kind of auxiliary source circuit of wide input voltage range, it includes synchronous buck type voltage-stablizer, synchronous buck type voltage stabilizing
The first electric capacity is connected between the VIN pins of device and GND pin, between the VIN pins and RUN pins of synchronous buck type voltage-stablizer,
It is connected to first resistor, second resistance, the 3rd electric between RUN pins and OVLO pins, between OVLO pins and GND pin respectively
Resistance, the 3rd electric capacity is connected between the SS pins of synchronous buck type voltage-stablizer and GND pin, and it is steady that the 4th resistance is connected on synchronous buck type
Between the ISET pins of depressor and GND pin, first inductance one end is connected with the SW pins of synchronous buck type voltage-stablizer, the other end
It is connected with the output end of circuit and this end is also connected to the 5th resistance, synchronous drop between the VFB pins of synchronous buck type voltage-stablizer
The 6th resistance, output end and the synchronous buck type voltage-stablizer of circuit are connected between the VFB pins of die mould voltage-stablizer and GND pin
The second electric capacity is connected between GND pin.
The auxiliary source circuit of described wide input voltage range, its input voltage range is the DC voltage of 4V～150V.
The auxiliary source circuit of described wide input voltage range, its output voltage range is straight for 0.8V～input voltage value
Stream voltage.
The auxiliary source circuit of described wide input voltage range, its synchronous buck type voltage-stablizer adopts model LTC3639
Chip.
Because using technical scheme as above, the utility model has following superiority：
The auxiliary source circuit of the wide input voltage range, its simple structure is reasonable in design, and synchronous buck type voltage-stablizer is adopted
Step-down synchronous rectification, is operated in burst mode（BURST）, efficiency can be effectively improved and power consumption is reduced, can be with
100% duty cycle, and built-in high side and lowside power metal-oxide-semiconductor, input voltage and output voltage range width, and be not required to
Network is compensated, and with delay startup and overvoltage/undervoltage defencive function.
Description of the drawings
Fig. 1 is the schematic diagram of the auxiliary source circuit of the utility model wide input voltage range.
Specific embodiment
The technical solution of the utility model is described in further detail with reference to the accompanying drawings and examples.
As shown in figure 1, the auxiliary source circuit of the wide input voltage range, it includes synchronous buck type voltage-stablizer, with circuit
The connected synchronous buck type voltage-stablizers of direct-flow input end VIN VIN pins and GND pin between be connected to the first electric capacity C1, the
One electric capacity C1 is input filter capacitor, filters the clutter on supply lines and interference, and first resistor R1 is connected on synchronous buck type voltage stabilizing
The VIN pins of device U1 and input undervoltage protection end（RUN pins）Between, second resistance R2 is connected on synchronous buck type voltage-stablizer U1's
RUN pins and input overvoltage protection end（OVLO pins）Between, 3rd resistor R3 is connected on the OVLO of synchronous buck type voltage-stablizer U1
Between pin and GND pin, first resistor R1, second resistance R2,3rd resistor R3 realize the under-voltage and overvoltage protection of the circuit
Function, the 3rd electric capacity C3 is connected on the delay startup end of synchronous buck type voltage-stablizer U1（SS pins）Between GND pin, circuit is realized
The slow ISET pins and GND pin for opening defencive function, the 4th resistance R4 and synchronous buck type voltage-stablizer U1 between, for arranging
The peak point current of input, first inductance L1 one end is connected with the SW pins of synchronous buck type voltage-stablizer U1, the other end and circuit
Output end VOUT is connected and this end is also connected to for arranging output voltage between the VFB pins of synchronous buck type voltage-stablizer U1
The 6th resistance R6, the output of circuit are connected between the VFB pins and GND pin of the 5th resistance R5, synchronous buck type voltage-stablizer U1
The second electric capacity C2 is connected between end and the GND pin of synchronous buck type voltage-stablizer U1, the second electric capacity C2 is output filter capacitor.
Above-mentioned input voltage range is the DC voltage of 4V～150V.
Above-mentioned output voltage range is the DC voltage of 0.8V～input voltage value VIN.
The auxiliary source circuit of wide input voltage range of the present utility model, its operation principle is：The input voltage VIN of circuit
When scope is 4V～150V, the scope of output voltage is 0.8V～VIN, choose suitable first resistor R1, second resistance R2, the
The value of three resistance R3 ensures normal circuit operation to arrange synchronous buck type voltage-stablizer U1 overvoltage/undervoltages point, chooses the suitable 5th
Resistance R5 and the 6th resistance R6 arranges required output voltage.When circuit output voltage VO UT be more than VIN when, circuit it is defeated
Go out voltage follow input voltage, i.e. VOUT=VIN；When output voltage VO UT of circuit is less than VIN, the output voltage of circuit is
The voltage of required setting.
Preferred embodiment of the present utility model is the foregoing is only, rather than to restriction of the present utility model, without departing from this
In the case of the spirit and scope of utility model, all impartial changes made according to the utility model claim and modification,
All should belong within scope of patent protection of the present utility model.
Claims (4)
1. a kind of auxiliary source circuit of wide input voltage range, is characterized in that：It includes synchronous buck type voltage-stablizer, synchronous buck
The first electric capacity, VIN pins and the RUN pins of synchronous buck type voltage-stablizer are connected between the VIN pins of type voltage-stablizer and GND pin
Between, be connected to respectively between RUN pins and OVLO pins, between OVLO pins and GND pin first resistor, second resistance,
Three resistance, the 3rd electric capacity is connected between the SS pins of synchronous buck type voltage-stablizer and GND pin, and the 4th resistance is connected on synchronous buck
Between the ISET pins of type voltage-stablizer and GND pin, first inductance one end is connected with the SW pins of synchronous buck type voltage-stablizer, separately
One end is connected with the output end of circuit and this end is also connected to the 5th resistance between the VFB pins of synchronous buck type voltage-stablizer, together
The 6th resistance, output end and the synchronous buck type voltage stabilizing of circuit are connected between the VFB pins and GND pin of step buck regulator
The second electric capacity is connected between the GND pin of device.
2. the auxiliary source circuit of wide input voltage range according to claim 1, is characterized in that：Its input voltage range is
The DC voltage of 4V～150V.
3. the auxiliary source circuit of wide input voltage range according to claim 1, is characterized in that：Its output voltage range is
The DC voltage of 0.8V～input voltage value.
4. the auxiliary source circuit of wide input voltage range according to claim 1, is characterized in that：Its synchronous buck type voltage stabilizing
Device adopts the chip of model LTC3639.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621098647.3U CN206099754U (en) | 2016-09-30 | 2016-09-30 | Wide input voltage range's auxiliary source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621098647.3U CN206099754U (en) | 2016-09-30 | 2016-09-30 | Wide input voltage range's auxiliary source circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206099754U true CN206099754U (en) | 2017-04-12 |
Family
ID=58481022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621098647.3U Expired - Fee Related CN206099754U (en) | 2016-09-30 | 2016-09-30 | Wide input voltage range's auxiliary source circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206099754U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322048A (en) * | 2018-01-25 | 2018-07-24 | 福州瑞芯微电子股份有限公司 | BUCK converters and its input/output control circuit |
-
2016
- 2016-09-30 CN CN201621098647.3U patent/CN206099754U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322048A (en) * | 2018-01-25 | 2018-07-24 | 福州瑞芯微电子股份有限公司 | BUCK converters and its input/output control circuit |
| CN108322048B (en) * | 2018-01-25 | 2019-05-31 | 福州瑞芯微电子股份有限公司 | BUCK converter and its input/output control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170412 Termination date: 20170930 |