Electricity: power supply or regulation systems – In shunt with source or load – Using choke and switch across source
Reexamination Certificate
2008-06-05
2009-12-08
Vu, Bao Q (Department: 2838)
Electricity: power supply or regulation systems
In shunt with source or load
Using choke and switch across source
C323S282000, C323S284000, C323S286000
Reexamination Certificate
active
07629778
ABSTRACT:
An exemplary voltage converter includes a pulse width modulation controller chip, a pull-up transistor, a pull-down transistor, and a low pass filter. The pulse width modulation controller chip includes a plurality of pins, a gate control logic circuit, a first gate driver, a second gate driver, a current source, a first resistor, a first comparator, and a power-on reset circuit. The plurality of pins include a Vcc pin connected to a chip power supply, a BOOT pin connected to the Vcc pin via a first zener diode for receiving power from the chip power supply, a PHASE pin connected to the BOOT pin via a capacitor, a UGATE pin, a LGATE pin, and a GND pin that is grounded. The PHASE pin serves as a multi-function pin in the pulse width modulation controller chip.
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Kursun et al., High Input Voltage Step-down DC-DC Converters for Integration in A Low Voltage CMOS Process, Proceedings of 2004 International Symposium on Quality of Electronic Design, Mar. 2004, p. 517-521, IEEE, San Jose, CA, USA.
Fitipower Integrated Technology, Inc.
Niranjan Frank R.
Vu Bao Q
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