3938

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 .............................. -55°C to +150°C Thermal Impedances, typ. (TA = +25°C)* A3938SEQ, RØJA ..................................... 37 °C/W A3938KLQ, RØJA..................................... 44 °C/W * JEDEC High K board. The A3938 is a three-phase, brushless, DC-motor controller. The A3938’s high current gate drive capability allows driving of a wide range of power MOSFETs and can support motor supply voltages to 50V. The A3938 integrates a bootstrapped high side driver to minimize the external component count required to drive N-channel MOSFET drivers. Internal, fixed, off-time, PWM, current-control circuitry can be used to regulate the maximum load current to a desired value. The peak load current limit is set by the user’s selection ...