3940 Datasheet | Allegro MicroSystems

3940 3940 ADVANCED DATASHEET - 4/9/03 (Subject to change without notice.) H-BRIDGE POWER MOSFET CONTROLLER The A3940 was designed specifically for driving high power DC motors in automotive applications. The A3940 provides four high current gate drive outputs capable of driving a wide range of power N-channel MOSFETs. Bootstrap capacitors are utilized to provide the above battery supply voltage required for N-channel FETs. An internal charge pump for the highside will allow for DC (100% duty cycle) operation of the bridge. PHASE and ENABLE input terminals are provided for use in controlling the speed and direction of a DC motor with externally applied PWM control signals. Protection Features include supply under-voltage and over-voltage, programmable deadtime adjustment for cross-conduction protection, thermal shutdown, and motor lead short-to-supply and short-to-ground protection. The A3940 is available in 28L low profile (1mm) e-TSSOP packaging (LP) which has an exposed pad solderable to PCB layers for improved thermal and electrical performance. Also, it is available in the widebody, SOIC (LW) package. .. VDRAIN 1 LSS 2 GLB 3 SB 4 GHB 5 CB 6 VIN 7 VREG13 8 CA 9 GHA 10 SA 11 GLA 12 VBB 13 CP2 14 28 VDSTH 27 IDEAD 26 LONG 25 RESET 24 PHASE 23 ENABLE A3940LP, LW 22 SR 21 MODE 20 VREG5 19 OVSET 18 FAULT 17 GND 16 CP1 15...