It's for a LM5177 battery backup system.
I need to know how to design a bidirectional current limiting functionality!
negative -> 2A - charging the battery
AND
positive -> 4A - discharge the battery
So far I have only found current limiting functionality with positive OR negative direction, I need them both in the same design!
Any sugestions?
//Fredrich
Like this?
*** CC both charge and discharge
Change in block diagram: polarity of the internal constant current sensor signals. ISNSN & ISNSP
*** CV charge (battery top voltage)
The external linear VIN (VBAT) CV regulation
*** CV discharge
The normal feedback(FB) configuration.
How do you implement end of charge? Monitor IMONOUT signal?
//Fredrich
Li-on battery charge topology, brief.
Thanks for the reply!
To be super clear, is this blockdiagram/building blocks right? (Missing anything?)
*** CC both charge and discharge
Change in block diagram: polarity of the internal constant current sensor signals. ISNSN & ISNSP
*** CV charge (battery top voltage)
The external linear VIN (VBAT) CV regulation
*** CV discharge
The normal feedback(FB) configuration.
Hi Fredrich,
For CC charge and discharge:
CC charge: internal constant current loop (ISNSN & ISNSP)
CC discharge: Internal peak current loop (CSA and CSB)
Best Regards,
Feng Ji
