Urgent, thank you

soda

Urgent, thank you [Copy link]

Experts, I need -5V power supply for 7135 chip. But transformer can only provide +5V voltage. How to convert +5V to -5V? Can it be realized with chip? Experts, please give me some advice. Thank you. OP07 also has similar problem.

ccsughx

Haha, sorry, you can use a power conversion IC from Panasonic, KWDXX or something like that. The one I used is KWD15-1212. The supported voltage is +12V, -12V, 5V. I don't know what model it is, it's outdated.

virtue

Use 7905

soda

I have found many voltage conversion chips on the Internet, but I can't tell the difference between them. For example, MAX639 and MAX1044