Pin 1 and pin 5 are both connected in Fig. 1 of the datasheet, only pin 1 is connected in all the other schematics.
When you measure resistance between whatever is left of pin 1 (if anything) and pin 5, do you end up close to 0 ohm?
It's hard to say whether connecting only pin 5 would suffice. It could be that pin 1 is connected with thick bondwires to handle large currents while pin 5 is not, in that case you blow up the bondwires when using an LM3886 with pin 1 open and pin 5 connected. Unless someone has X-ray equipment to check or knows an amplifier design that only uses pin 5, I guess the only way to find out is to build an amplifier and let it run at maximum power for a couple of hours with a big power resistor as a load.
When you measure resistance between whatever is left of pin 1 (if anything) and pin 5, do you end up close to 0 ohm?
It's hard to say whether connecting only pin 5 would suffice. It could be that pin 1 is connected with thick bondwires to handle large currents while pin 5 is not, in that case you blow up the bondwires when using an LM3886 with pin 1 open and pin 5 connected. Unless someone has X-ray equipment to check or knows an amplifier design that only uses pin 5, I guess the only way to find out is to build an amplifier and let it run at maximum power for a couple of hours with a big power resistor as a load.
Is there anything left of pin 1? If there's enough to solder a wire to, you could always connect it to pin 5 with a short wire staple before you solder it to a PCB. I personally wouldn't use a chip with broken pins.
Tom
Tom
If you're desperate, you could grind out a little bit of the plastic so you have enough to solder onto.
It would be nice if it doesn't blow up expensive loudspeakers then, hence my proposal to test it for a few hours at maximum power with a power resistor as a load.