xmen_xwk
Full Member level 3
I like IR2121 low side driver, because it has current sensing inside. But the problem is, to limit different currents, I need to keep replace the sense resistor. Which is kind of annoying or tiring. Using voltage divider on sense resistor is not what I want. Instead I want to replicate current sensing of IR2121 and change reference voltage for limiting the current.
I have drawn this schematics, which uses IR2110 driver for now. But the problem is HC08 turns out on as input reaches 2v. While it should be on around 4.8V.
I'm also wondering, is there anything I'm doing wrong ? Any suggestions would be nice.
Thank you.
I have drawn this schematics, which uses IR2110 driver for now. But the problem is HC08 turns out on as input reaches 2v. While it should be on around 4.8V.
I'm also wondering, is there anything I'm doing wrong ? Any suggestions would be nice.
Thank you.
![wu4cxv.png](https://i67.tinypic.com/wu4cxv.png)