STDRIVE102BH datasheet(2/56 Pages) STMICROELECTRONICS

2 / 56 page

The gate drivers are designed to drive, with a programmable gate current, six external N-channel power

MOSFETs, allowing a superior performance of the power stage and regulating the slew rate of power outputs

without the need of external gate resistors. The different configurations of the drivers can be selected through two

analog pins (IGATE and TCC).

An integrated charge pump supplies the three high-side drivers, enabling unlimited on-time of the high-side

MOSFETs.

An embedded 12 V LDO linear regulator provides the supply of the three low-side drivers and its output is

available on the VCC pin, to also supply external loads.

Another LDO linear regulator provides a 3.3 V on the VDD pin to supply external low-voltage components and the

embedded analog front-end (AFE), which has a different configuration, depending on the device part number: the

STDRIVE102BH integrates three operational amplifiers and three comparators, the STDRIVE102H integrates one

operational amplifier and two comparators. In a typical application, the operational amplifiers can be used to

monitor the voltage across the shunt resistor(s) sensing the current flowing in the motor phases. Concurrently, the

comparators can be used to detect dangerous overcurrent conditions.

A full set of embedded protections is present to increase the overall application robustness: undervoltage lockout

(UVLO) on each supply (VCC, VDD, and charge pump voltage), thermal shutdown, and a VDS monitoring on both

high-side and low-side MOSFETs. In case a protection is triggered, the nFAULT open-drain pin signals the event.

The STDRIVE102BH has another dedicated open-drain pin (FLAG) which indicates whether the gate driver

supply VCC falls below the guard limit. The device integrates a smart shutdown function which allows immediate

turn-off of the outputs of the gate driver in the case of 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 dedicated pin VM, which should be connected

to the motor supply voltage, in correspondence of the drains of the high side N-channel MOSFETs. The VM pin is

used for the integrated VDS monitoring as well as a reference voltage for the charge pump. To increase device’s

flexibility, the VS and VM pin can operate at different voltages.

STDRIVE102BH, STDRIVE102H

DS14545 - Rev 1

page 2/56

STDRIVE102BH 数据表(PDF) 2 Page - STMicroelectronics