Published:2011/4/1 3:49:00 Author:Nicole | Keyword: converter
The figureof a MOSFET resonant DC / DC converter circuit isas below. In this circuit, the transformer is operating in unsaturation mode, with arc changes through the grid feedback voltage of MOSFET, by reducing the grid voltage to make MOSFET flip.
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Published:2011/4/1 3:48:00 Author:Nicole | Keyword: soft-switching power supply
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.
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Published:2011/3/30 1:26:00 Author:may | Keyword: Stabilized voltage and stabilized current
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Published:2011/4/6 3:15:00 Author:Nicole | Keyword: switching power supply, isolated
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.
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Published:2011/3/31 21:32:00 Author:may | Keyword: inverter power supply
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Published:2011/3/29 20:27:00 Author:may | Keyword: stabilized voltage supply
13V stabilized voltage supply composed of μ7812 adopts diode to upgrade output voltage. (View)
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Published:2011/3/29 20:33:00 Author:may | Keyword: Adjustable power supply
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Published:2011/4/11 22:24:00 Author:Nicole | Keyword: Ni-Cd battery, charger
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Published:2011/4/11 3:47:00 Author:Nicole | Keyword: AC voltage regulator
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Published:2011/4/11 3:46:00 Author:Nicole | Keyword: regulated power supply
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Published:2011/4/11 3:44:00 Author:Nicole | Keyword: regulated power supply, sampling ratio
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Published:2011/4/11 3:39:00 Author:Nicole | Keyword: under-voltage, integrated chip
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Published:2011/4/11 3:35:00 Author:Nicole | Keyword: soft start, regulated power supply
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Published:2011/4/11 3:41:00 Author:Nicole | Keyword: Full wave commutate
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Published:2011/4/11 3:13:00 Author:Nicole | Keyword: passive lossless soft-switching, PFC
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Published:2011/4/11 3:11:00 Author:Nicole | Keyword: negative output voltage, integrated regulator
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Published:2011/4/11 3:06:00 Author:Nicole | Keyword: regulated power supply, temperature range
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Published:2011/4/11 3:03:00 Author:Nicole | Keyword: lithium ion battery, button type
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Published:2011/4/11 2:39:00 Author:Nicole | Keyword: Logic level control, regulated power supply
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Published:2011/4/11 2:38:00 Author:Nicole | Keyword: logic control, regulated power supply
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