Title:
A POWER SUPPLY CIRCUIT
Document Type and Number:
WIPO Patent Application WO2003007463
Kind Code:
A3
Abstract:
A power circuit comprises a power supply (1) operable in a burst mode having on and off alternating phases and a continuous mode, a switch (4), a phase detector (5) for detecting the burst mode phase of the power supply (1) and for generating a signal indicative of the phase of the power supply (1), and a switch disabler (6) dependent on the signal from the phase detector (5) for disabling the switch (4) depending on the phases of the burst mode.The burst mode phase may be detected using a capacitor (C1) and resistor (R4) connected across an output of the power supply (1) with a time constant smaller than the burst mode period.This circuit allows switching on of a high load (R3) in synchronization with an on phase of the burst mode, reducing voltage dips and preventing unwanted re-setting of a microprocessor present in the circuit.
Inventors:
RISSEEUW PIETER M
Application Number:
PCT/IB2002/002621
Publication Date:
April 17, 2003
Filing Date:
July 02, 2002
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
International Classes:
H02M3/335; H02M3/00; (IPC1-7): H02M3/335
Foreign References:
| EP1120894A2 | 2001-08-01 | |||
| US6166926A | 2000-12-26 | |||
| US6252783B1 | 2001-06-26 | |||
| EP0964503A2 | 1999-12-15 | |||
| US6191959B1 | 2001-02-20 |
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