CN2899270Y - Small large-power DC/DC converter - Google Patents
Small large-power DC/DC converter Download PDFInfo
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- CN2899270Y CN2899270Y CN 200620019020 CN200620019020U CN2899270Y CN 2899270 Y CN2899270 Y CN 2899270Y CN 200620019020 CN200620019020 CN 200620019020 CN 200620019020 U CN200620019020 U CN 200620019020U CN 2899270 Y CN2899270 Y CN 2899270Y
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Abstract
The utility model is a small large-power DC/DC converter comprises an input filter circuit, a switch circuit, an output rectifier filter circuit and a control circuit connected with the switch circuit which are orderly connected between an input port and an output port. The control circuit is provided with a boost circuit which is connected between the input port and the input end of the control circuit. The square-wave signal is output by the control circuit to control the make-break of the switch circuit. The DC/DC converter is adopted with a PH3830L high-power switch, a SC2603 controller chip, a SC1517 small-current DC pressor chip, a WE744318270 high-power inductor and a R4607 patch tantalum capacitor. The small large-power DC/DC converter of the utility model has the technic effect of that: the volume is decreased from structure, the power is improved from control, and the quality of load output is guaranteed.
Description
Technical field
The utility model relates to power technology, particularly a kind of small-sized high-power DC/DC converter.
Background technology
The effect of DC/DC converter is that a kind of direct current is converted to another kind of direct current.In existing DC/DC converter technology, at input voltage is under the situation of 2.7V-3.3V (the low-voltage input of＜3V), the DC/DC controller chip of general CMOS (perhaps BiCMOS technology), as Maxim, Linear, the product of companies such as NS, driving force is relatively poor, be difficult to accomplish driven MOS FET (metal oxide semiconductor field effect tube switch) output HIGH voltage (＞12V) and high-power (greater than 25W), even reached, efficient can high (＜75%) yet, and, its volume is big (greater than 30mm*30mm*6mm), ripple electricity poor (output is greater than 50mV).
The utility model content
The purpose of this utility model is to provide that a kind of encapsulation volume is little, power big and improve the small-sized high-power DC/DC converter of output quality.
A kind of small-sized high-power DC/DC of the utility model converter, comprise and be connected to input filter circuit, switching circuit, output rectifier and filter and the control circuit that links to each other with switching circuit that links to each other successively between input port and the output port, wherein said control circuit is provided with a booster circuit, and booster circuit is connected between the input of input port and control circuit; Described control circuit output is used to control the square-wave signal of described switching circuit break-make.
The utility model small-sized high-power DC/DC converter, wherein said input filter circuit adopts " Г " mode filter that is made of inductor and input capacitor, wherein inductor employing model is the inductor of WE744318270LF, and it is the paster tantalum capacitor of R4607 that input capacitor adopts model.
The utility model small-sized high-power DC/DC converter, wherein said output rectifier and filter is provided with diode and output capacitance, the diode forward series connection is between the output and output port of switching circuit, output capacitor also is attached on the output port, and it is the paster tantalum capacitor of R4607 that output capacitor adopts model.
The utility model small-sized high-power DC/DC converter, it is the high power switch of PH3830L that wherein said switching circuit adopts model, it is the controller chip of SC2603 that control circuit adopts model, and it is the DC/DC DC boosting chip of SC1517 that booster circuit adopts model.
The utility model small-sized high-power DC/DC converter, wherein said output rectifier and filter is provided with the clamp circuit that is made of two divider resistances, two divider resistances series connection back also is attached on the output port, and the node of two divider resistances series connection is connected to the reference voltage output terminal of control circuit.
The utility model small-sized high-power DC/DC converter, the operating frequency of described control circuit is 200KHz.
The beneficial effect of the utility model small-sized high-power DC/DC converter is:
1, on the structure, the DC/DC control circuit chip and the little current boost circuit chip of bipolar process have been adopted, planar package type small size, high-current inductor and little encapsulation, Da Rong value, high-tension paster tantalum electric capacity, and little encapsulation, powerful switch mosfet device are combined, reduce volume greatly, improved power.
2, in the control, adopted little electric current DC/DC booster circuit chip power supply, made control circuit chip operate as normal, and, guaranteed the quality of load output by clamp circuit control circuit output voltage.
Description of drawings
Below in conjunction with accompanying drawing the utility model number is described further:
Fig. 1 is the block diagram of the utility model small-sized high-power DC/DC converter;
Fig. 2 is the circuit diagram of the utility model small-sized high-power DC/DC converter.
Embodiment
Referring to Fig. 1 and Fig. 2, usually, under the situation of low-voltage input, as input voltage vin is 2.7V-3.3V, and the DC/DC controller chip of general CMOS (perhaps bipolar process) is as Maxim, Linear, the product of companies such as NS, driving force is relatively poor, be difficult to accomplish driven MOS FET (metal oxide semiconductor field effect tube) switched voltage output more than 12V simultaneously power output greater than 25W.
The utility model small-sized high-power DC/DC converter comprises being connected to input filter circuit 1, switching circuit 2, output rectifier and filter 3 and the control circuit 5 that links to each other with switching circuit 2 that links to each other successively between input port and the output port.Wherein: input filter circuit 1 adopts " Г " mode filter that is made of inductor L1 and input capacitor C5, and it is the large power, electrically sensor of WE744318270LF that inductor L1 adopts model.This large power, electrically sensor is planar package type small size (less than 14mm*13mm*5mm), big electric current (saturation current is greater than 16A) inductor.Input capacitor C5 is the high-tension paster tantalum of a Da Rong value electric capacity.
It is the high-power MOSFET switch of PH3830L that switching circuit 2 adopts models, and its packing forms is SOT669, and volume equates that with the volume that traditional SO-8 encapsulates its power is greater than 50W.
It is the controller chip of SC2603 that control circuit 5 adopts model.Controller chip SC2603 is the DC/DC controller chip of bipolar process; this chip is the 5V-16V input voltage; output has the above instantaneous drive current of 500mA; the controller chip of more traditional CMOS or BICMOS technology is a lot of greatly; can satisfy the powerful requirement of driving switch circuit 2 outputs, also have the small size encapsulation, have overcurrent protection and 95% above conversion efficiency.
Cooperate and adopt the SC2603 controller chip, because its actual operating voltage requires more than the 4V, so in control circuit 5, be provided with a booster circuit 4, booster circuit 4 is connected between the input of input port and control circuit 5, adopt one and be input as 2.7V-5V, be output as little electric current (＜20mA) the DC/DC booster circuit chip SC1517 of 5V.
Output rectifier and filter 3 is provided with diode D1 and output capacitance C1, C2, C3, C4, the series connection of diode D1 forward is between the output and output port of switching circuit 2, output capacitance C1, C2, C3, C4 respectively and be attached on the output port output capacitance C1, C2, C3, it is the paster tantalum capacitor of R4607 that C4 adopts model.Output rectifier and filter 3 is provided with the clamp circuit that is made of two divider resistance R4, R5, and two divider resistance R4, R5 series connection back also is attached on the output port, and the node of two divider resistance R4, R5 series connection is connected to the reference voltage output terminal FB of control circuit 5.
In the embodiment of the utility model small-sized high-power DC/DC converter, the operating frequency of control circuit 5 is 200KHz.
The concrete course of work of the utility model small-sized high-power DC/DC converter is as follows:
Referring to Fig. 2, when input port Vin had the direct current input of 2.7V-3.3V voltage, input current had two whereabouts, and the one, enter input filter circuit 1, as the energy source of power output; There is a very little part to enter booster circuit 4 in addition, SC1517 becomes 5V with voltage from 2.7V-3.3V through chip, offer the pin Vin of SC2603 as operating voltage by pin Vout, 5V voltage can make the chip SC2603 operate as normal of control circuit 5, SC2603 exports square-wave signal with the operating frequency of 200KHz at pin Gate, is used for the break-make of control switch circuit 2 chip PH3830L.In the time of the PH3830L conducting, input current charges to capacitor C 5 and inductance L 1, while output capacitance C1, and C2, C3, C4 is to load discharge.When PH3830L turn-offed, input capacitance C5 and inductance L 1 were passed through diode D1 to load discharge, simultaneously to output capacitance C1, and C2, C3, C4 charging.The chip SC2603 of control circuit 5 is following in working order, and the reference voltage by pin FB output 1.25V is clamped at 12V with the output of diode D1 all the time by divider resistance R 4 and R 5.Diode D1 plays rectification and isolates output.
Claims (6)
1. small-sized high-power DC/DC converter, comprise and be connected to input filter circuit (1), switching circuit (2), output rectifier and filter (3) and the control circuit (5) that links to each other with switching circuit (2) that links to each other successively between input port and the output port, it is characterized in that: wherein said control circuit (5) is provided with a booster circuit (4), and described booster circuit (4) is connected between the input of described input port and described control circuit (5); Described control circuit (5) output is used to control the square-wave signal of described switching circuit (4) break-make.
2. small-sized high-power DC/DC converter as claimed in claim 1, it is characterized in that: wherein said input filter circuit (1) adopts " Γ " mode filter that is made of inductor (L1) and input capacitor (C5), it is the inductor of WE744318270LF that described inductor (L1) adopts model, and it is the paster tantalum capacitor of R4607 that described input capacitor (C5) adopts model.
3. small-sized high-power DC/DC converter as claimed in claim 1 or 2, it is characterized in that: wherein said output rectifier and filter (3) is provided with diode (D1) and output capacitance (C1, C2, C3, C4), the series connection of described diode (D1) forward is between the output and described output port of described switching circuit (5), described output capacitor (C1, C2, C3, C4) and be attached on the described output port, described output capacitor (C1, C2, C3, C4) adopting model is the paster tantalum capacitor of R4607.
4. small-sized high-power DC/DC converter as claimed in claim 3, it is characterized in that: it is the high power switch of PH3830L that wherein said switching circuit (2) adopts model, it is the controller chip of SC2603 that described control circuit (5) adopts model, and it is the DC/DC DC boosting chip of SC1517 that described booster circuit (4) adopts model.
5. small-sized high-power DC/DC converter as claimed in claim 4, it is characterized in that: wherein said output rectifier and filter (3) is provided with the clamp circuit that is made of two divider resistances (R4, R5), described two divider resistances (R4, R5) series connection back also is attached on the described output port, and the node of described two divider resistances (R4, R5) series connection is connected to the reference voltage output terminal (FB) of described control circuit (5).
6. small-sized high-power DC/DC converter as claimed in claim 5 is characterized in that: the operating frequency of described control circuit (5) is 200KHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620019020 CN2899270Y (en) | 2006-03-31 | 2006-03-31 | Small large-power DC/DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620019020 CN2899270Y (en) | 2006-03-31 | 2006-03-31 | Small large-power DC/DC converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899270Y true CN2899270Y (en) | 2007-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620019020 Expired - Fee Related CN2899270Y (en) | 2006-03-31 | 2006-03-31 | Small large-power DC/DC converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2899270Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010034162A1 (en) * | 2008-09-28 | 2010-04-01 | Bosch Power Tools (China) Co., Ltd. | Control device for controlling a motor in a low voltage dc power tool and control method thereof |
| CN114204793A (en) * | 2021-12-04 | 2022-03-18 | 三峡大学 | Volume optimization method for passive device of single-phase active power factor correction converter |
-
2006
- 2006-03-31 CN CN 200620019020 patent/CN2899270Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010034162A1 (en) * | 2008-09-28 | 2010-04-01 | Bosch Power Tools (China) Co., Ltd. | Control device for controlling a motor in a low voltage dc power tool and control method thereof |
| CN114204793A (en) * | 2021-12-04 | 2022-03-18 | 三峡大学 | Volume optimization method for passive device of single-phase active power factor correction converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070509 Termination date: 20110331 |