STA6940M: Brushed DC Motor Driver IC With PWM Control

Combining low-power CMOS-compatible logic with high-current, high-voltage power MOSFET outputs, the STA6940M provides complete control and drive for brush DC motors. It provides internal fixed off time, pulse-width modulation (PWM) control of the output current, rated for 4 A normal operating level.

The CMOS logic section provides four modes of operation: forward and reverse normal drive rotation, outputs-off free spin (coast), and electronic braking.

The innovative multi-chip internal structure separates the main logic IC (MIC) from the four N-channel power MOSFETs. This results in lower thermal resistance and greater efficiency.

PWM control allows constant-current control of output while reducing heat generation and power losses by providing fixed off-time dual decay modes. The internal charge pump ensures full power availability for switching.

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  • Power supply voltage, VBB, 44 V maximum, 10 to 40 V normal operating range
  • Logic supply voltage, VDD, 3 to 5.5 V compatible
  • Output current, IO, 4 A average, 8 A maximum
  • Output elements are all N-channel MOSFETs to reduce losses
  • Internal charge pump
  • Forward, reverse, free, and brake control modes available
  • Constant-current control:
    • Off-time 35 µs, fixed (Slow Decay mode)
  • Internal Overcurrent Protection (OCP) circuitry
    • Off-time 142 µs fixed (Fast Decay mode)
  • Internal Thermal Shutdown (TSD) circuitry
  • ZIP type 18-pin fully-molded package (STA package)

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Part Number Specifications and Availability

Part Number Package Type Temperature RoHS
Compliant
Part Composition /
RoHS Data
Comments Samples Check
Distributor Stock
STA6940M 18-lead ZIP -40°C to 125°C Yes View Data New Contact your
local sales rep
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