I looked inside an IBM laptop charger and it was considerably simpler than the Apple charger. Since it always outputs power, it doesn't include the microcontrol

I looked inside an IBM laptop charger and it was considerably simpler than the Apple charger. Since it always outputs power, it doesn't include the microcontroller in the Apple charger. The other circuitry was somewhat simpler (it didn't output multiple voltages), and the IBM charger didn't go to as much effort to be compact.