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3940 - Full-Bridge Power MOSFET Controller

General Description

GLB/GLA.

MOSFET drivers.

External series gate resistors can be used to control slew rate seen at the power MOSFET’s gate.

Key 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. www. DataSheet4U. com VDRAIN 1 LSS 2 GLB 3 SB 4 GHB 5 CB 6 VIN 7 VREG13 8 CA 9.

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Datasheet Details

Part number 3940
Manufacturer Allegro Micro Systems
File Size 600.11 KB
Description Full-Bridge Power MOSFET Controller
Datasheet download datasheet 3940 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.