STMicroelectronics — PWD5T60 Motor Power Stage

STMicroelectronics has launched the PWD5T60, a three-phase motor driver which integrates gate drivers and six 500 V power MOSFETs with on-resistance of 1.38 Ω for superior application efficiency.  

Ideal for applications operating at up to 500 V, the PWD5T60 also includes zero-drop bootstrap diodes, minimizing the need for external components, and occupying 30% less board space than comparable discrete drivers. Tightly matched propagation delays at both high- and low-side MOSFETs eliminate cycle distortion, giving the designer flexibility to set operating frequencies to optimize response time and power efficiency. 

The PWD5T60 is backed by a dedicated evaluation board, the EVLPWD-FAN-PUMP, which enables engineers to quickly evaluate the performance of the PWD5T60 in applications consuming up to 100 W. The board features the PWD5T60 and an STM32G0 microcontroller, enabling field-oriented control or six-step control of permanent magnet synchronous motors (PMSM) and brushless dc (BLDC) motors.  

High-voltage motor applications benefit from the PWD5T60 array of protection functions. Smart shutdown uses a comparator to provide fast over-current protection. When a fault is detected, the output is immediately turned off, and the subsequent output disable time can be set by connecting a capacitor and an optional pull-up resistor to a dedicated pin. The turn-off response is not affected by these components, so product developers can set the optimal disable time to ensure that the fault is resolved quickly while still implementing immediate turn-off. 

The PWD5T60 handles a wide supply-voltage range of 9 V to 20 V, while CMOS/TTL-compatible logic inputs down to 3.3 V simplify interfacing with a host MCU.