Patent ID: 7148658

Claim:
A method for charge control of a photoflash capacitor comprising the steps of: detecting a voltage on the photoflash capacitor; asserting and then latching a recharge signal when the detected voltage is lower than a first reference voltage; de-asserting and then latching the recharge signal when the detected voltage is higher than a second reference voltage; asserting and de-asserting a first output signal respectively when the detected voltage is lower and higher than the first reference voltage; asserting and de-asserting a second output signal respectively when the detected voltage is higher and lower than the second reference voltage; asserting the recharge signal when the first output signal is asserted, until the second output signal is asserted; de-asserting the recharge signal when the first output signal is asserted, until the first output signal is asserted; charging the photoflash capacitor when the recharge signal is asserted; and providing a pin for connection of a resistive element which determines the first reference voltage.