Hi, I am trying to design a Li ion battery charger. after reading some datasheet, I found that the smooth switching from constant current mode to constant voltage is critical point. I found that implementation in LTC4062 is quite interesting. here I have some question about it
1), why the bulk of pass pmos need to connect to the VCC through a diode ?
2), how the CA VA TA loop works? I do not really understand those diode's usage.
3), It looks there are many loop. I guess it is quite difficult to make it stable.
how to select all the opamp bandwidth?
Thanks in advancd
flesher