STMicroelectronics STDRIVE101

The STDRIVE101 is a low voltage gate driver suitable for driving three-phase brushless motors. It is a single-chip with three half-bridge gate drivers for N-channel power MOSFETs. Each driver has a current capability of 600 mA (sink/source). It integrates a low drop linear regulator generating the supply voltage for both low-side and high-side gate drivers through a bootstrap circuitry.

The device provides Under Voltage Lock Out (UVLO) on both the low-side and high-side sections, preventing the power switches from operating in low efficiency or dangerous conditions.

The control logic integrated into the STDRIVE101 allows two input strategies (high-side and low-side or enable and PWM driving signals). The driving method is selected according to DT/MODE pin. In both cases, prevention from cross conduction is ensured by interlocking or internally generated deadtime.

The STDRIVE101 also features a V_DS monitoring protection for each external MOSFET, thermal shutdown and can be put in the standby mode to reduce the power consumption.

The device is available in a VFQFPN 4x4 24 leads package option.

Features

• Operating voltage from 5.5 to 75 V
• 600 mA sink/source current capability
• 3.3 V and 5 V control logic
• Two input strategies:
  • ENx/INx with adjustable deadtime generation
  • INHx/INLx with interlocking
• Matched propagation delay for all channels
• Very short propagation delay: 40 ns
• Integrated bootstrap diodes
• 12 V LDO linear regulator (50 mA max.)
• Embedded V_DS monitor for each external MOSFET
• Overcurrent comparator
• UVLO and thermal shutdown protection
• Standby mode for low current consumption operation

EVALSTDRIVE101 - STDRIVE101 demonstration board for three-phase brushless motors

The EVALSTDRIVE101 is a demonstration board based on the STDRIVE101, a three-phase gate driver, and the STL110N10F7 power MOSFETs.

The EVALSTDRIVE101 is designed to drive three-phase brushless DC motors and it can be interfaced with different STM32 microcontrollers through the motor control connector.

The board can be configured in single shunt and three-shunt and can support FOC and six-step algorithms in both configurations.

The Hall sensors connector and the phase sensing network present on-board allow to implement both sensor and sensorless algorithms for motion control.

The EVALSTDRIVE101 allows a full evaluation of the STDRIVE101 and its features, including the embedded comparator for overcurrent protection and the drain-source voltage sensing of each power MOSFET.

 

Features

• Input bus voltage from 6 V to 75 V with dedicated monitoring
• Output current up to 20 A_rms – Power stage based on the STL110N10F7 power MOSFETs
• STDRIVE101 embedded features:
  • Two input strategies (enable / input with adjustable deadtime generation or direct driving with interlocking)
  • V_DS sensing of the power MOSFETs
  • Overcurrent protection with internal comparator
• Three-shunt or single-shunt configurable current sensing
• BEMF or Digital Hall sensor circuitries
• NTC sensor for PCB temperature monitoring
• Motor control connector compatible with a wide range of STM32 boards and systems