3933 Datasheet (Allegro MicroSystems) - THREE-PHASE POWER MOSFET CONTROLLER

3933, THREE-PHASE POWER MOSFET CONTROLLER

Terminal 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Name PGND RESET GLC SC GHC CC GLB SB GHB CB GLA SA GHA CA VCCOUT LCAP FAULT MODE VBB H1 H3 H2 DIR BRAKE BRKCAP BRKSEL PWM RC SENSE REF DEAD AGND RESET * A logic input used to enable the device,

Data Sheet 26301.100† 3933 RESET PGND AGND GLC DEAD REF SC THREE-PHASE POWER MOSFET CONTROLLER The A3933SEQ is a three-phase MOSFET controller for use with bipolar brushless dc motors.

It drives all n-channel external power FETs, allowing system cost savings and minimizing r(DS)on power loss.

The high-side drive block is implemented with bootstrap capacitors at each output to provide the floating positive supply for the gate drive.

The high-side circuitry also employs a unique “intelligent” FE

3933 Features

* I I I I I I I I I I I I I I Drives External N-Channel FETs Intelligent High-Side Gate Drive Selectable Coast or Dynamic Brake on Power Down Adjustable Dead Time for Cross-Conduction Protection Selectable Fast or Slow Current-Decay Modes Internal PWM Peak Current Control Reset/Coast Input 120° Hall C