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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.
Kit part number: EVALSTDRIVE101
The EVALSTDRIVE101 is a demonstration board based on the STDRIVE101, a three-phase gate driver, and STL110N10F7 power MOSFETs. The board drives three-phase brushless dc motors. It can be interfaced with various STM32 microcontrollers through a motor control connector.
The board may be arranged in single- and three-shunt configurations, and supports field-oriented control (FOC) and six-step algorithms in either configuration. In addition, a Hall sensor connector and a phase-sensing network on the board enable the designer to implement both sensor and sensorless algorithms for motor control.
The EVALSTDRIVE101 allows full evaluation of the STDRIVE101 features, including the embedded comparator for over-current protection, and drain-source voltage sensing at each power MOSFET.