PassPulse width modulation(PWM) controls a low-voltage DC motor, and the A3918 is capable of delivering 1.5 amps of output current and operating from 2.5 to 9 V.
The A3918 has a fixed off-time PWM timer that sets the peak current based on the choice of current sense resistor. The overcurrent output flag is used to notify the user when the current within the motor windings reaches a peak current, which can be sensed by a sense resistor. Output failures do not affectdriveRun.
The A3918 is available in a 16-contact, 3 mm × 3 mm, 0.75 mm nominal total height QFN package with exposed pads for enhanced heat dissipation. It is packaged as a lead (PB) free product and features 100% matte tin leadframe plating.
Can be used in the following applications:
- Digital Camera (DSC)
- Mobile phone camera
- USB powered devices
- Battery-powered devices
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- Operates between 2.5 and 9 V
- Internal PWM current control
- Synchronous rectification reduces power consumption
- Peak current output marker
- Undervoltage lockout
- Low RDS (On)output
- Small package
- Braking mode for DC motors
- Sleep function
- Crossover current protection
- Thermal shutdown function