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Alan Liu
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2019/09/01 23:32:39 (permalink)
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MCP19111

Hi Experts, 
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.
 
Thanks
post edited by Alan Liu - 2019/09/01 23:59:08

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2 Replies Related Threads

    ani777
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    Re: MCP19111 2020/04/29 10:58:31 (permalink)
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    Hi, 
     
    Were you able to resolve this issue ? 
     
    Regards, 
    Ani
    #2
    Alan Liu
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    Re: MCP19111 2020/04/29 18:34:36 (permalink)
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    Hi, 
    No, I did not solve this issue, but I've changed a new EVM board, using the same code, the issue did not happen.
    I think it might something damaged on the EVM board.
    #3
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