Shenzhen Sts Microelectronics Co., Ltd.

Stmicroelectronics S.r.l.

Weiguo Ge

Wangsheng Xie

Matteo Alessio Traldi

Guojun Li

CongQing Xiong

A driver for a DC-to-DC converter that may utilize a flyback or buck-boost converter circuit. The driver includes a driver circuit and an interface circuit. The interface circuit has a sensor sensing an input voltage from a DC supply and generating a sensor signal to a driver selector. The driver selector compares the sensor signal to a comparison voltage to determine the type of converter circuit and then transmits a selector signal to a driver circuit where it is used to control one or more of the components of the driver circuit, such as the logic circuit which is used for driving the converter to regulate the converter output. The sensor includes a sense resistor along with a current-sense amplifier, which is adapted for connection to a high side or a low side of a power supply while still producing a substantially equivalent output voltage or sensor signal.

Driver for DC-to-DC converter with controller interface

Driver with control interface facilitating use of the driver with varied DC-to-DC converter circuits

A current sense amplifier including a transconductance amplifier to measure a current passing through a sense resistor and generate a reference current indicative of the measured current. A current mirror circuit is connected to the transconductance amplifier and receives the reference current for amplification to generate an amplified output current. A cascode circuit is connected serially to the current mirror circuit to boost an output impedance for the amplifier at the output of the generated amplified output current. The current mirror circuit and cascode circuit of the current sense amplifier are each formed from a pair of transistors sharing a common control node, with the transistors realized using with bipolar or MOS technology.

Low voltage current sense amplifier circuit

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Shenzhen, China

Weiguo Ge