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Index 246

Fore input power supply circuit diagram using depressurization switching power supply

Published:2011/4/20 9:05:00 Author:Nicole | Keyword: switching power supply

Fore input power supply circuit diagram using depressurization switching power supply
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Reliable (15W) switching power supply making circuit diagram

Published:2011/4/20 3:00:00 Author:May | Keyword: 15W, switching power supply

Reliable (15W) switching power supply making circuit diagram
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TDA8132 typical application circuit (switching regualted power supply)

Published:2011/4/20 6:25:00 Author:May | Keyword: typical application, switching regualted power supply

TDA8132 typical application circuit (switching regualted power supply)
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TDA8130 typical application circuit (switching regualted power supply)

Published:2011/4/20 6:25:00 Author:May | Keyword: typical application, switching regualted power supply

TDA8130 typical application circuit (switching regualted power supply)
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STR6309 power supply

Published:2011/4/20 6:23:00 Author:May | Keyword: power supply

STR6309 power supply
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SONY KV2185 power supply

Published:2011/4/20 6:22:00 Author:May | Keyword: power supply

SONY KV2185 power supply
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SONY KV2184 power supply

Published:2011/4/20 6:22:00 Author:May | Keyword: power supply

SONY KV2184 power supply
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SONY G3F-K power supply 2

Published:2011/4/20 6:21:00 Author:May | Keyword: power supply

SONY G3F-K power supply 2
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SONY G3F-K power supply 1

Published:2011/4/20 6:20:00 Author:May | Keyword: power supply

SONY G3F-K power supply 1
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Simpleset standard Li-ion battery charger

Published:2011/4/20 6:34:00 Author:May | Keyword: Li-ion battery charger

Simpleset standard Li-ion battery charger
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Automatic plumbic acid charging circuit diagram

Published:2011/4/20 6:36:00 Author:May | Keyword: Automatic, plumbic acid, charging

Automatic plumbic acid charging circuit diagram
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Two-way output normal shock type 150W precision switch stabilized voltage supply

Published:2011/4/20 5:07:00 Author:May | Keyword: Two-way output, normal shock type, 150W, precision switch, stabilized voltage supply

+5V, +12V two-way output normal shock type 150W precision switch stabilized voltage supply is shown in the diagram. This power supply uses one pieces of TOP227Y(IC1), linearity optical couple CNY17-2 (IC2, the production of Germany Telefunken company) , adjustable precision parallel regulator TL431 (IC3). AC input voltage is 110V/220V. When it is low voltage input, power supply's efficiency can reach 77% (typical value). S is power supply choosing switch. When S is closed, it is choosing AC voltage IIOV voltage doubling rectifying circuit. Its working principle is shown in the following diagram. Supposing the positive half period a point of AC is positive potential, b point is negative potential, at this time, the diode VDb and VDd on rectifier bridges is breaking over, VDa an VDd is cutting off, shown in diagram (a). 110V AC can charge to C1 according to the following ways: u→a→C1→VDc→b, it can charge Uc1 to about ×llOV=155V, its polarity is that up end is positive and down end is negative. When in negative half period, b point is positive potential, a point is changing to negative potential, the equivalent circuit is shown in diagram (b). At this time, VDa, VDd is breaking over, VDb, VDc is cutting off, the current can charge to C10 according to following ways: u→b→VDa→C10→a, it can make Uc10≈115V, and the polarity is also that up end is positive and down end is negative. (View)

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Small size middle power switching powr supply (10W-60W circuit diagram)

Published:2011/4/20 3:43:00 Author:May | Keyword: Small size, middle power, switching powr supply, 10W-60W

Small size middle power switching powr supply (10W-60W circuit diagram)---amplifying circuit diagram (View)

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AC 220V-DC 5V/10A switching power supply

Published:2011/4/20 2:11:00 Author:May | Keyword: AC 220V-DC 5V/10A, switching power supply

AC 220V-DC 5V/10A switching power supply
This circuit is energy supply by 220V AC network. It adds to SIPMOS FET BUZ80 and transformer primary winding n1 after passing radio interference filter, GL2 rectifier and 220μF filter. The duty factor control of FET is finished by integrated circuit TDA4718. Its duty factor limiting must less than 0.5 in order to limit the size of output voltage. Winding n2 can make transformer magnet core to degaussing after every pulse. Thereby it can improve the efficiency of transformer. Transformer data: n1=112 turns, 15×0.1mm copper lacquered wire; n2=112 turns, 12×0.04mm copper lacquered wire; n3=1 turn, shield thin foil. Choke data: 10 turns, 4×30×1mm copper lacquered wire. (View)

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AC 110V-DC 5V/10A switching power supply

Published:2011/4/20 2:15:00 Author:May | Keyword: AC 110V-DC 5V/10A, switching power supply

AC 110V-DC 5V/10A switching power supply

This circuit is energy supply by 110V AC network. It adds to SIPMOS FET BUZ80 and transformer primary winding n1 after rectifying and filtering. The duty factor control of FET is finished by integrated circuit TDA4718. Its duty factor must less than 0.5. Winding n2 can make transformer magnet core to degaussing after every pulse in order to improve the efficiency. (View)

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Single-ended fly-back converter switching power supply principle diagram

Published:2011/4/19 1:40:00 Author:May | Keyword: Single-ended, fly-back, converter switching, power supply

Single-ended fly-back converter switching regulated power supply is not only consisting of a transistor. Two transistors also can make up single-ended converter type switching regulated power supply. The basic difference between single-ended fly-back switching regulated power supply and push pull, full bridge, half bridge two ends converter switching regulated power supply is the magnetic core of high frequency transformer only works on one side of magnetic hysteresis loop (first quadrant). Typical single-ended fly-back converter switching regulated power supply principle diagram is shown in the diagram. So called single end is the magnetic core of converting circuit is only working on one side of its magnetic hystersis loop. So called fly back is storage energy at primary winding when transistor is breaking over and the storage energy releasing to load by secondary coil when transistor is cutting off. When switching tube VT1 is breaking over by encouraging of controlled pulse, input voltage Ui will add to primary winding N1 of high frequency transformer. Vice-side winding N2 has not current because rectifier diode VD of transformer T1's vice-side winding is reverse connecting. (View)

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Automatic charger circuit of homemade nickel-cadmium battery

Published:2011/4/17 22:09:00 Author:May | Keyword: Automatic charger, homemade, nickel-cadmium battery

Automatic charger circuit of homemade nickel-cadmium battery
This charger of nickel-cadmium battery adopts given voltage to control charging. It can automaticly stop to charge when the battery voltage reach to prescribed value.working principleThe circuit is shown in diagram 4-16. Commercial power passes transformer, rectifier circuit composed of transformer T and rectifier diode VD1~VD4. Then the commercial power is filtering and outputing DC voltage by capacitor C1. Resistor R1 and LED H1 make up working power light. Three teminal regulator integrated package IC and reistor R2, R3 make up constant current circuit. The peripheral cell is Triode VT, integrated circuit LM324 and transfer switch S2 and so on. They make up constant voltage control switch circuit. Voltage regulator tube VD6 and resistor R5, R6, R7 make up charge circuit to battery. LM324's pin 6 connects standard control voltage. LM324's pin 5 connects anode of battery. When pin 5's voltage is lower than pin 6's (that is battery voltage is lower), pin 7 will output low voltage (0V). That is, pin 9's voltage si lower than pin 10's. Pin 8's output is high level, VT is turn on (that is power turn on). (View)