Hi Team,
i met a problem while debuging the BQ25713:
The main problem is blow:
we remove the 2s battery and only use 5v adapter as power source.
we found that the Vsys would drop with the system current rise and we also could not limite the Vsys above the SYSmin. i attached the Log under two working condition.
Situation1: Vin=5V with no load
reg[ 0]=0xa
reg[0x1]=0x87
reg[0x2]=0xc0
reg[0x3]=0x7
reg[0x4]=0xd0
reg[0x5]=0x20
reg[0x6]= 0
reg[0x7]= 0
reg[0x8]= 0
reg[0x9]= 0
reg[0xa]= 0
reg[0xb]=0x2
reg[0xc]= 0
reg[0xd]=0x18
reg[0xe]= 0
reg[0xf]=0x41
reg[0x10]=0xff
reg[0x11]=0xff
reg[0x12]=0xff
reg[0x13]=0xff
reg[0x14]=0xff
reg[0x15]=0xff
reg[0x16]=0xff
reg[0x17]=0xff
reg[0x18]=0xff
reg[0x19]=0xff
reg[0x1a]=0xff
reg[0x1b]=0xff
reg[0x1c]=0xff
reg[0x1d]=0xff
reg[0x1e]=0xff
reg[0x1f]=0xff
reg[0x20]= 0
reg[0x21]=0x84
reg[0x22]= 0
reg[0x23]=0xa8
reg[0x24]= 0
reg[0x25]=0x41
reg[0x26]= 0
reg[0x27]=0x1f
reg[0x28]= 0
reg[0x29]= 0
reg[0x2a]= 0
reg[0x2b]= 0
reg[0x2c]=0x57
reg[0x2d]=0x57
reg[0x2e]=0x40
reg[0x2f]=0x88
reg[0x30]=0x10
reg[0x31]=0x2
reg[0x32]=0xb7
reg[0x33]=0x2
reg[0x34]=0x30
reg[0x35]= 0
reg[0x36]=0x65
reg[0x37]=0x4a
reg[0x38]=0xa0
reg[0x39]=0x81
reg[0x3a]=0xff
Situaiton2: Vin=5v with system load:
[2021-02-20_17:28:32]reg[ 0]=0xa
[2021-02-20_17:28:32]reg[0x1]=0x87
[2021-02-20_17:28:32]reg[0x2]=0xc0
[2021-02-20_17:28:32]reg[0x3]=0x7
[2021-02-20_17:28:32]reg[0x4]=0xd0
[2021-02-20_17:28:32]reg[0x5]=0x20
[2021-02-20_17:28:32]reg[0x6]= 0
[2021-02-20_17:28:32]reg[0x7]= 0
[2021-02-20_17:28:32]reg[0x8]= 0
[2021-02-20_17:28:32]reg[0x9]= 0
[2021-02-20_17:28:32]reg[0xa]= 0
[2021-02-20_17:28:32]reg[0xb]=0x2
[2021-02-20_17:28:32]reg[0xc]= 0
[2021-02-20_17:28:32]reg[0xd]=0x18
[2021-02-20_17:28:32]reg[0xe]= 0
[2021-02-20_17:28:32]reg[0xf]=0x41
[2021-02-20_17:28:32]reg[0x10]=0xff
[2021-02-20_17:28:32]reg[0x11]=0xff
[2021-02-20_17:28:32]reg[0x12]=0xff
[2021-02-20_17:28:32]reg[0x13]=0xff
[2021-02-20_17:28:32]reg[0x14]=0xff
[2021-02-20_17:28:32]reg[0x15]=0xff
[2021-02-20_17:28:32]reg[0x16]=0xff
[2021-02-20_17:28:32]reg[0x17]=0xff
[2021-02-20_17:28:32]reg[0x18]=0xff
[2021-02-20_17:28:32]reg[0x19]=0xff
[2021-02-20_17:28:32]reg[0x1a]=0xff
[2021-02-20_17:28:32]reg[0x1b]=0xff
[2021-02-20_17:28:32]reg[0x1c]=0xff
[2021-02-20_17:28:32]reg[0x1d]=0xff
[2021-02-20_17:28:32]reg[0x1e]=0xff
[2021-02-20_17:28:32]reg[0x1f]=0xff
[2021-02-20_17:28:32]reg[0x20]= 0
[2021-02-20_17:28:32]reg[0x21]=0x8c
[2021-02-20_17:28:32]reg[0x22]= 0
[2021-02-20_17:28:32]reg[0x23]=0xa8
[2021-02-20_17:28:32]reg[0x24]= 0
[2021-02-20_17:28:32]reg[0x25]=0x41
[2021-02-20_17:28:32]reg[0x26]= 0
[2021-02-20_17:28:32]reg[0x27]=0x1c
[2021-02-20_17:28:32]reg[0x28]= 0
[2021-02-20_17:28:32]reg[0x29]= 0
[2021-02-20_17:28:32]reg[0x2a]= 0
[2021-02-20_17:28:32]reg[0x2b]=0x6
[2021-02-20_17:28:32]reg[0x2c]=0x5
[2021-02-20_17:28:32]reg[0x2d]=0x9
[2021-02-20_17:28:32]reg[0x2e]=0x40
[2021-02-20_17:28:32]reg[0x2f]=0x88
[2021-02-20_17:28:32]reg[0x30]=0x10
[2021-02-20_17:28:32]reg[0x31]=0x2
[2021-02-20_17:28:32]reg[0x32]=0xb7
[2021-02-20_17:28:32]reg[0x33]=0x2
[2021-02-20_17:28:32]reg[0x34]=0x30
[2021-02-20_17:28:32]reg[0x35]= 0
[2021-02-20_17:28:32]reg[0x36]=0x65
[2021-02-20_17:28:32]reg[0x37]=0x4a
also i attached the schematic below:
i may need you help on finding the rount cause and therefore find a way to solve.
BR
Brandon
