STMicroelectronics STDRIVE102BH/H Triple Half-Bridge Gate Drivers

The STDRIVE102BH/H features embedded protections, increasing the overall application robustness. The protections include undervoltage lockout (UVLO) on each supply (V_CC, V_DD, and charge pump voltage), thermal shutdown, and V_DS monitoring on both high-side and low-side MOSFETs. If a protection is triggered, the nFAULT open-drain pin signals the event. The STMicro STDRIVE102BH has another dedicated open-drain pin (FLAG), demonstrating whether the gate driver supply V_CC falls below the guard limit. The device integrates a smart shutdown operation that enables immediate turn-off of the outputs of the gate driver in the case of a fault by minimizing the propagation delay between the fault detection event and the actual output switch-off.

In addition to the main supply pin (VS), the STDRIVE102BH/H has a dedicated pin VM, which should be connected to the motor supply voltage in correspondence with the drains of the high-side N-channel MOSFETs. The VM pin is utilized for the integrated VDS monitoring and as a reference voltage for the charge pump. The VS and VM pins can operate at different voltages to increase the device's flexibility.