A3938SLD Hoja de datos - Allegro MicroSystems

Three-Phase Power MOSFET Controller

   The A3938 is a three-phase, brushless dc motor controller. The A3938 high-current gate drive capability allows driving of a wide range of power MOSFETs and can support motor supply voltages to 50 V. The A3938 integrates a bootstrapped high-side driver to minimize the external component count required to drive N-channel MOSFET drivers.

FEATURES
◾ Drives wide range of N-channel MOSFETs
◾ Low-side synchronous rectification
◾ Power MOSFET protection
◾ Adjustable dead time for cross-conduction protection
◾ Selectable coast or dynamic brake on
   power-down or RESET input
◾ Fast/slow current decay modes
◾ Internal PWM current control
◾ Motor lead short-to-ground
   protection
◾ Internal 5 V regulator
◾ Fault diagnostic output
◾ Thermal shutdown
◾ Undervoltage protection