Trickle charge control
Abstract:
A system includes a trickle charge control circuit coupled to a charge pump and a motor driver circuit. The trickle charge control circuit is configured to sense a voltage at a bootstrap capacitor voltage node (VBST) of the motor driver circuit; as a result of the voltage at VBST being greater than a voltage at an input voltage node (VIN), couple a charge pump voltage node (VCP) to VBST of the motor driver circuit, where a voltage at VCP is greater than the voltage at VIN; and as a result of the voltage at VBST being less than the voltage at VIN, decouple VCP from the charge pump from VBST of the motor driver circuit.
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