name: M51977P-16P4 function: Switching Regulator Control package: DIP16,16 manufacturer: Mitsubishi added-by: Andrew Woods +--()--+ COLLECTOR | 1 16| Vcc Vout | 2 15| CLM+ EMITTER | 3 14| CLM- VF | 4 13| GND ON/OFF | 5 12| CT OVP | 6 11| T-OFF DET | 7 10| CF F/B | 8 9| T-ON +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/ name: M51977P-20P2N function: Switching Regulator Control package: DIP20,20 manufacturer: Mitsubishi added-by: Andrew Woods +--()--+ COLLECTOR | 1 20| Vcc Vout | 2 19| CLM+ EMITTER | 3 18| CLM+ VF | 4 17| GND HEATSINK PIN | 5 16| HEATSINK PIN HEATSINK PIN | 6 15| HEATSINK PIN ON/OFF | 7 14| CT OVP | 8 13| T-OFF DET | 9 12| CF F/B |10 11| T-ON +------+ This information was added by a third party and may be incorrect. This pinout came from the Chipdir: http://www.chipdir.org/