I used the ADM00513 MCP19111 battery charger EVM board to write my code.
If I set the PE1 decon bit to 1, enable the diode emulation and to increase the output current to over 0.8A,
the current ripple became very worst, like pic "VSW_IBAT2"
If I decrease the output current to less than 0.8A, the current ripple is better, like Pic"VSW_IBAT and VSW_IBAT1"
I've also tried to change the PE1 Decon bit to 0, disabled the diode emulation, and using E-load on CV mode to simulate the battery, the current ripple is well, less than 50mA.
What should I check for using diode emulation?
Below is the desired design spec,
VIN : 12V
VOUT : 2.5V~4.35V / I : 1.5A
Battery : 3.7V/2800mAH li-ion battery.
post edited by Alan Liu - 2019/09/01 23:59:08