Gate driver IC s integrated to trim brushless motors
The STDrive1010 is an integrated three-phase, half-bridge driver IC which STMicroelectronics says is optimised for low-voltage industrial applications up to 75V. It is a space-efficient and power-saving IC to control three-phase brushless motors in many pieces of equipment, such as e-bikes, power tools, pumps, fans, light machinery and gaming consoles, said the company.
The STDrive101 embeds three half-bridge drivers for external N-channel MOSFETs, each able to sink and source up to 600mA gate current. Integrated bootstrap diodes and a 50mA 12V low dropout (LDO) regulator supply external components to minimise the bill of materials cost. There is also a comparator for over-current detection using external resistors and drain-source voltage monitoring of each MOSFET for short circuit protection.
Essential safety features are built-in, including internally generated dead-time to prevent cross-conduction, over-temperature shutdown, and under-voltage lockout (UVLO) on both the low and high side sections to prevent the MOSFETs from operating in low efficiency or dangerous conditions.
Switching can be controlled with individual high-side and low-side signals or a single PWM signal and enable input, via a DT/Mode selection pin. A standby pin sets the STDrive101 in low-power mode with the LDO off for energy savings when idle.
The STDrive101 is available now in a 24-pin VFQFN 4.0 x 4.0mm package.
