Bengt
Junior Member level 1
Hi.
I know that this is a really long shot but you never know.
I'm trying to repair a lithium battery protection and/or balancing board. On this, compared to others similar I have seen, really heavy mounted board, there are two chips I can't recognize. It is one 5 pin SC-74A and one 6 pin SC-74. It could be diodes because of the board marking but I am not sure. The problem is that the chip markings do not match anything I can find.
Chip markings:
5 pin SC74A: GCLF
6 pin SC-74: G3MF
I started looking into the cross reference but found no hits I have now spent hours searching through various manufacturers. I have still no idea what the manufacturer can be. It is probably not the same as any other chip on the board. There is for example a MOSFET from Chenmko.
The SC74A can be a diode pair, common cathode (according to the multi-meter) but with a never-seen configuration with the cathode at pin 5 and the anodes at pin 1 and 3.
The SC74 can be anything, measuring gives nothing, diodes and double diode voltage everywhere.
I know that this is a really long shot but you never know.
I'm trying to repair a lithium battery protection and/or balancing board. On this, compared to others similar I have seen, really heavy mounted board, there are two chips I can't recognize. It is one 5 pin SC-74A and one 6 pin SC-74. It could be diodes because of the board marking but I am not sure. The problem is that the chip markings do not match anything I can find.
Chip markings:
5 pin SC74A: GCLF
6 pin SC-74: G3MF
I started looking into the cross reference but found no hits I have now spent hours searching through various manufacturers. I have still no idea what the manufacturer can be. It is probably not the same as any other chip on the board. There is for example a MOSFET from Chenmko.
The SC74A can be a diode pair, common cathode (according to the multi-meter) but with a never-seen configuration with the cathode at pin 5 and the anodes at pin 1 and 3.
The SC74 can be anything, measuring gives nothing, diodes and double diode voltage everywhere.
Last edited:
