Tag Archives: PWM

Maxim 785 Power Supply Controller

Another chip from the clamshell iBook from 2000. ¬†Another Maxim power chip, this time it is from the main PCB.   Its a MAX785C which I am pretty sure is a dual (3.3V & 5V) PWM buck regulator for laptop … Continue reading

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Texas Instruments TL494C PWM Control Circuit

The TL494C is a pulse width modulation control circuit, designed for power supply control, from the small power board on a clamshell iBook from 2000. I have read the datasheet a few times and find it a quite complicated device. … Continue reading

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