Power supply restart delay prevention circuit

Details Power supply restart delay prevention circuit Power supply restart delay prevention circuit

2006-07-04

2006-07-04

Cunningham, Terry D. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C323S901000, C327S110000, C363S150000

Reexamination Certificate

active

07071742

ABSTRACT:
The auto-restart characteristic of a controller is prevented. A circuit comprises a voltage control loop, a control winding, an optical isolator component, and a diode biasing network. In the case of a power outage, the current from the voltage control loop begins to drop, resulting in the optical isolator component coming out of conduction. The optical isolator component coming out of conduction cuts off current to the control input of the controller. The removal of current causes the control winding voltage to drop, removing current from the diode biasing network, resulting in the removal of a bias voltage from the control pin of the controller. This removal results in the drop of the received voltage at the control pin, such that the received voltage is never in the trigger range of the auto-restart characteristic. Consequently, on reapplication of power, the controller achieves normal startup time.

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Power Integrations®, Inc., “Top 209/210 TOPSwitch® Family-Three-terminal Off-Line PWM Switch”, Aug. 1997, Power Integrations, Inc. 477 N. Mathilda Ave, Sunnyvale, CA 94086, 16 Pages.
Power Integrations®, Inc., “Top 221/227 TOPSwitch®-II Family-Three-terminal Off-Line PWM Switch”, Jul. 2001, Power Integrations, Inc. 477 N. Mathilda Ave, Sunnyvale, CA 94086, 20 Pages.

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