Integrated motor driver chip ideal for three-phase applications

The STDRIVE101 single-chip motor driver from STMicroelectronics enables designers of motors or inverters to reduce component count and simplify their system board design.

The STMicroelectronics STDRIVE101 is a single chip containing three half-bridge gate drivers for N-channel power MOSFETs, and providing a comprehensive system for driving three-phase brushless motors. The IC integrates a low-dropout linear regulator which generates the supply voltage for both the low- and high-side gate drivers through a bootstrap circuit.

 This means that replacing a circuit based on the use of discrete single or dual gate drivers with the STDRIVE101 reduces component count and simplifies the design.

 Each of the STDRIVE101’s half-bridge drivers has a current capability of 600 mA sink/source. The operating-voltage range is 5.5 V to 75 V. Under-voltage lockout protection on both the low- and high-side sections prevents the power switches from operating in low-efficiency or dangerous conditions. Interlocking and dead-time functions prevent cross-conduction.

 The logic inputs are CMOS/TTL-compatible at levels down to 3.3 V, to provide for easy interfacing with control devices.