3938 Datasheet (Allegro MicroSystems) - THREE PHASE POWER MOSFET CONTROLLER

3938, THREE PHASE POWER MOSFET CONTROLLER

RESET.

A logic input that enables the device.

Has internal 50K pull-up to LCAP.

RESET=1 will coast or brake the motor depending on the state of the BRKSEL pin.

RESET=0 will enable gate drive to follow commutation logic.

RESET = 1 will override the BRAKE pin.

GLC/GLB/GLA.

Low-side gate drive output

3938 PRELIMINARY DATASHEET - 11/07/02 (Subject to change without notice) THREE PHASE POWER MOSFET CONTROLLER ABSOLUTE MAXIMUM RATINGS ( at TA = +25°C ) Load Supply Voltage, VBB 50 V VREG (Transient) 15 V Logic Input Voltage Range, VIN -0.3 V to VLCAP + 0.3 V Sense Voltage, VSENSE -5 to 1.5 V Pins SA/SB/SC, -5 to 50 V Pins GHA/GHB/GHC -5 to VBB + 17 V Pins CA/CB/CC SA/SB/SC+17 V Operating Temperature Range, TA -20°C to +85°C Junction Temperature, TJ +150°C Storage Temperature Range, TS -5

3938 Features

* includes bootstrap capacitor charging current monitor, regulator under-voltage monitor, motor lead short-to-ground, and thermal shutdown. The A3938 is available in a choice of two packages: a 32-pin, rectangular PLCC suffix “EQ”; and 36-pin, QSOP, suffix “LQ”. FEATURES T Drives Wide Range of N-cha