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Switching-Regulator Circuit

Index 6

Single-ended flyback integrated switching power supply circuit diagram

Published:2011/3/30 3:20:00 Author:Nicole | Keyword: integrated switching power supply, Single-ended flyback

Single-ended flyback integrated switching power supply circuit diagram
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Boost switching regulator application circuit diagram

Published:2011/3/30 3:14:00 Author:Nicole | Keyword: switching regulator

Boost switching regulator application circuit diagram
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Output voltage polarity reversal application circuit diagram composed of components and W497

Published:2011/3/30 3:10:00 Author:Nicole | Keyword: Output voltage, component

Output voltage polarity reversal application circuit diagram composed of components and W497
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Quasi-resonance switching power supply circuit diagram composed of WK212-166

Published:2011/4/12 4:04:00 Author:Nicole | Keyword: quasi-resonance, switching power supply

Quasi-resonance switching power supply circuit diagram composed of WK212-166
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Color display switching power supply circuit diagram composed of STK7308

Published:2011/4/12 4:03:00 Author:Nicole | Keyword: color display, switching power supply

Color display switching power supply circuit diagram composed of STK7308
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Switching power supply circuit diagram composed of STRS5941

Published:2011/4/12 4:03:00 Author:Nicole | Keyword: switching power supply

Switching power supply circuit diagram composed of STRS5941
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Buck switching regulator circuit diagram composed of W497

Published:2011/3/30 3:17:00 Author:Nicole | Keyword: switching regulator

Buck switching regulator circuit diagram composed of W497
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Separately excited switching power supply circuit diagram using self-excited multivibrator as pulse generator

Published:2011/4/1 3:56:00 Author:Nicole | Keyword: switching power supply, self-excited multivibrator, pulse generator

As shown, separately excited switching power supply circuit which used self-excited multivibrator as pulse generator, VTlis the switch tube; VT2, VT3are the push tubes; VT4is the emitter follower. Self-excited multivibrator as the separately excited oscillation circuit is composed of VT5, VT6, C2, C3, R3, R4 and so on. The emitter-coupled differential amplifier is made of VT7, VT8 which as the error amplification. Sampling circuit consists of resistors R7, R8 and R9 potentiometer in series. The reference voltage circuit composed of diode VD4 and R5. Diode VDl, VD2 is used to prevent the push tube VT2, VT3 emitter reversing voltage breakdown. VD3 for the after flow diode; L for the energy storage inductor. The turn-on and cut-off of switching regulator is flipped by the multivibrator, and controlled by emitter follower VT4. The time of multivibrator flip is determined by the error amplifier. The flip time of VT5 from the end to turn is determined by the charge current of VT8 to the C3. VT8 current is larger, the deadline of VT5 is longer. Similarly, The flip time of VT6 from the end to turn is determined by the charge current of VT7 to the C2 VT7 current is larger, the deadline of VL is shorter. When the output voltage down for some reason, VT8 tube collector current of the differential amplifier is decreased, VT7 tube collector current increases, so the conduction time of VT5 is shortened, extended the deadline, leading to the conduction time of VT4 longer, the deadline shorter, and ultimately the conduction time of control switch lengthened, shortened the deadline, so that the output voltage to rise, keep output voltage steady. (View)

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Frequency modulated switching power supply circuit diagram with steady performance

Published:2011/4/1 3:55:00 Author:Nicole | Keyword: frequency modulated, switching power supply

Frequency modulated switching power supply circuit diagram with steady performance
As is shown in the figure, this is another example of switching power supply. The frequency changes are in range of 38 ~ 70kHz, when the input voltage changes are in range of 90 ~ 300V, it can maintain the stability of the output DC voltage. (View)

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Real-time high-voltage switching power supply circuit diagram

Published:2011/4/1 3:54:00 Author:Nicole | Keyword: Real-time, high-voltage, switching power supply

Real-time high-voltage switching power supply circuit diagram
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Self-excited feedback transforming switching power supply circuit diagram

Published:2011/4/1 3:54:00 Author:Nicole | Keyword: switching power supply

Self-excited feedback transforming switching power supply circuit diagram
The basic principles of ringing choke-type as shown. When coupled with the input voltage, the current from Rg flowing to the base of switch VTl , so VTl conduction, when the diode of the transformer secondary side reverse biased, without current, so the streaming current of VT1 collector current and Np of transformer windings are equal. Because it is starting from zero, so the base current is not able to make VTl conduction. Rg is called the startup resistor. (View)

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With zero current transition soft-switching power supply circuit diagram

Published:2011/4/1 3:48:00 Author:Nicole | Keyword: soft-switching power supply

With zero current transition soft-switching power supply circuit diagram
The figure of a zero current transition soft-switching power supply practical circuit as below: single-phase AC input; output DC; main switchadopts MOSFET; power converteradopts half bridge circuit; integrated control chipadopts UC2865; power conversion adopts zero current transformation circuit. (View)

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5V/2A isolated switching power supply circuit diagram

Published:2011/4/6 3:15:00 Author:Nicole | Keyword: switching power supply, isolated

5V/2A isolated switching power supply circuit diagram
The circuit diagram as shown. C1 stands for the input filter capacitor. VDz and VD1 formonce sideclamp protection circuit. R1 is the resistance of the controlled end, C2 is a bypass capacitor. C10 is paralleled between TOP414GC-S-side to prevent high frequency interference occurring in the control side and caused power circuit malfunction. VD2 represents the output rectifier diodes, C3, C4, L, C5 and C6 form the output filter, C9 for the output Noise capacitor. External error amplifier is composed of the shunt regulator TL431. When the output voltage fluctuations, the samples obtained after R3, R4 partial pressure, compared with TL431 voltage reference, resulting in an external control signal, and then through the optical coupler PC817A to change TOP414G control terminal current, thereby regulating the track duty stabilize the Uo. Control loop gain is set by the R2. After VD3, C7 rectifier filter, the feedback winding voltage give the infrared receiver of PC817A power supply. (View)