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1. (WO2017040651) METHODS AND APPARATUS FOR A CONFIGURABLE HIGH-SIDE NMOS GATE CONTROL WITH IMPROVED GATE TO SOURCE VOLTAGE REGULATION

Pub. No.:    WO/2017/040651    International Application No.:    PCT/US2016/049686
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Thu Sep 01 01:59:59 CEST 2016
IPC: G05F 1/575
Applicants: TEXAS INSTRUMENTS INCORPORATED
TEXAS INSTRUMENTS JAPAN LIMITED
Inventors: BOAKYE, Emmanuel, Osei
SON, Roland, Karl
LUEBBE, Juergen
Title: METHODS AND APPARATUS FOR A CONFIGURABLE HIGH-SIDE NMOS GATE CONTROL WITH IMPROVED GATE TO SOURCE VOLTAGE REGULATION
Abstract:
In described examples, a transistor (320) has: a source and a drain coupled between a supply voltage and an output terminal; and a gate terminal. A charge pump (314) has: an output node (VGATE) coupled to the gate terminal; and a clock input. An oscillator (310) is coupled to generate a clock signal. A clock enable circuit (312) is coupled to: receive the clock signal; and selectively output the clock signal to the clock input, responsive to an enable signal. A comparator (360) is coupled to output the enable signal in response to a comparison between a reference current and a current through a series resistor (R1). The series resistor (R1) is coupled to the gate terminal.