Rosenberg, Klein & Lee
Current sense apparatus and method
A current sense apparatus and method comprises a common drain DMOSFET and a MOSFET connected in series between a high voltage and a low voltage to serve as an output stage. The DMOSFET produces a phase output current, a mirror current mirrored from the phase output current, and a sense voltage. A servo amplifier is connected with the mirror current and sense voltage to produce a current sense signal. Due to the mirror current from the DMOSFET proportional to the phase output current, the current sense apparatus senses the phase output current in a temperature independent manner.
Richtek Technology Corp.
H Y G H
H02M Y02B G01R H02M
additional additional inventional inventional
Jing-Meng Hung-I Shwu-Liang Liang-Pin
Liu Wang Hsieh Tai