Atx Power Supply Circuit Diagram Pdf
W ATX PC POWER SUPPLY
When limits are exceeded, the power is off. These short circuits prohibit the appearance of a voltage on the power circuit. Device use push-pull transistor circuit with regulation of output voltage. Zero voltage means the highest pulse-width.
The coupling reactive positive current disappears and produces an overvoltage on the excitation winding and blocks quickly the power transistor. This is an additional stabilization for offset the loss of voltage in the cables.
When the impulse is finished, then both exciting transistors goes to open. This excitation current generates a voltage on the base of the power transistor and, due to the reactive positive current, the transistor is rapidly brought to saturation.
Other voltages are not stabilized and are determined by the windings and the diodes polarity. Other voltages are not stabilised and they are justified by winding number and diode polarity. Positive feedback dissapears and overshoot on the exciting winding quickly closes power transistor.
On the output behind the rectifier diodes is a common coil for all voltages. Due to short-circuit is no voltage on the power circuit. Circuit guards all of output voltages and when the some limit is exceeded, power supply is stopped. On the output, after the rectifier diodes, a coil is common to all voltages.
Your email address will not be published. This site uses Akismet to reduce spam. Then the process is repeated with the second transistor. After it is process repetead with second transistor. On the output is necessary reactance coil due to high frequency interference.
This current excite voltage on base of power transistor and due to positive feedback transistor goes quickly to saturation. This voltage permit generating pulses whose maximum width is continually increasing. The main power supply starts gently. Leave a Reply Cancel reply Your email address will not be published.
Switched circuit is totally blocked. Start of supply Somebody pushes the power button on computer.
Tags atx pc repair power supply smps. Due to this voltage is maximum pulse-width continuosly increased and main power supply smoothly goes run. This circuit makes additional voltage stabilisation due to loss of voltage on cables. Similar circuit is used in the most power supplies with output power about W. The circuit is switched to the totally blocked state.
Notify me of new posts by email. When the input voltage is switched from V to V, the rectifier works as a voltage doubler.
Somebody pushes the power button on computer. Power supply is still blocked, zoho crm tutorial pdf until he is disconnected from power line input.
When the pulse is over, the two driver transistors are then opened. When we keep direction of windings and winding number corresponding to output voltages, then coil works like a transformer and we have compensation for irregular load of individual voltages. This voltage is evaluated before the coil, by the pulse width and cycle time. When voltage is switched from V to V, then rectifier works like a doubler. This voltage is rated from voltage before coil, pulse-width and duration cycle.
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