Dual-channel power system with an eight-pin PWM control chip

Details Dual-channel power system with an eight-pin PWM control chip Dual-channel power system with an eight-pin PWM control chip

1999-03-31

1999-12-07

Nguyen, Matthew

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

H02M 3335

Patent

active

059994215

ABSTRACT:
An embodiment of a dual-channel switching power system comprises a standby power supply and a main power supply both regulated by an eight-pin control chip. The control chip generates two sets of pulse-width modulation signal from a common clock oscillator and regulates the two power supplies during alternate clock cycles. The switching frequency and over-current limits of the two power supplies are adjustable by selecting different resistance values for two external resistors. The control chip provides an independent over-current protection to each power supply by monitoring the input power flow of the two power supplies via a common current-sense resistor.

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Unitrode Product Data Handbook, Apr. 1996, Unitrode Corporation. Merrimack, NH 03054, p. 3-192 to 3-198; p. 3-282 to 3-298.

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