I’m using an MP2650GV-000 (2 cell defaults) but I need to use it with 4 cells.
Testing without connected battery, when I set the BAT_NUM to 4, VSYS drop to near zero. Resetting the BAT_NUM to 2, VSYS rise-up to about 6V as default.
This happens with VIN=12V.. going down with the voltage to 5V the VSYS rise up again.
All test done on my board using MP2650 Evaluation kit software.
Attached the exported parameter used.
Is possible to use MP2650GV-000 for 4 cells or it’s mandatory to use the MP2650GV-400?
Thanks in advance
Parameters:
0000 00 00 0 REG00 64 100
0000 00 01 1 REG01 2D 45
0000 00 02 2 REG02 50 80
0000 00 03 3 REG03 F2 242
0000 00 04 4 REG04 00 0
0000 00 05 5 REG05 03 3
0000 00 06 6 REG06 05 5
0000 00 07 7 REG07 94 148
0000 00 08 8 REG08 06 6
0000 00 09 9 REG09 48 72
0000 00 0A 10 REG0A 36 54
0000 00 0B 11 REG0B 00 0
0000 00 0C 12 REG0C 40 64
0000 00 0D 13 REG0D 01 1
0000 00 0E 14 REG0E 22 34
0000 00 0F 15 REG0F 6C 108
0000 00 10 16 REG10 00 0
0000 00 11 17 REG11 FE 254
0000 00 12 18 REG12 70 112
0000 00 30 48 REG30 00 0
END
******************** Notes *************************
**** Configuration file: MP2650GV-AMS
**** Package: FCQFN30 4x5
**** Soft rev: 0.1
**** Date: 5/19/2026
****************** OTP Registers **********************
**** Customer Name: AMS
**** REG00[6-0]:INLIM=5000mA
**** REG01[7-0]:VINDPM=4500mV
**** REG02[6-0]:ICC=4000mA
**** REG03[7-4]:IPRE=840mA(1111)
**** REG03[3-0]:ITERM=200mA
**** REG04[6-1]:VB_FULL=3.7125V/Cell
**** REG04[0]:VRECH_OS=100mV/Cell
**** REG06[6-0]:VOTG=5.00V
**** REG07[7-6]:BAT_NUM=4 cell
**** REG30[3]:SYSMIN_SEL=Option1 for SYSMIN
**** REG07[5-4]:BAT_PRE/SYS_MIN=3.0V/Cell
**** REG07[3-0]:IOTG=1000mA
**** REG08[4]:Charge Disable
**** REG08[2]:NTC_GCOMP_SEL=Option1(OTG/NTC)
**** REG09[5-4]:WTD=Disable
**** REG09[3]:Charging Safety Timer Enable
**** REG09[2-1]:CHG_TMR=5hours
**** REG0B[4-3]:SW_FREQ=600k
**** REG0B[1-0]:PROCHOT/PSYS_CFG=Disable PROCHOT and PSYS Function
**** REG0C[7-5]:DIS_OC_PROCHOT=4A
**** REG0C[4]:VSYS_PROCHOT_TDB=10us
**** REG0C[1]:Independent Comparator CFG=Not PROCHOT assertion
**** REG0C[0]:Independent Comparator Reference=1.2V
**** REG0D[5-4]:VOTG_OV/VSYS_OV=125%
**** REG0D[3-2]:VOTG_UV/VSYS_UV=75%
**** REG0D[1-0]:SYS_UV_PROCHOT=5.8V
**** REG0E[7-5]:TDEB=200us
**** REG0E[4-1]:TDUR=0.4ms
**** REG0F[6-0]:INLIM2=5400mA
**** REG10[7-1]:Tmax=0.2ms
**** REG11[7-1]:Tperiod=25.6ms
**** REG12[6-3]:IIN_OCP=11.9A
**************** Other Registers ******************
**** REG05[7-5]:IR Compensation Resistor=0Ohm
**** REG05[4-2]:IR Compensation Voltage Clamp=0mV
**** REG05[1-0]:Thermal Regulation Threshold=120oC
**** REG08[7]:Keep Current register setting
**** REG08[6]:Watchdog Timer Reset=Normal
**** REG08[5]:OTG Disable
**** REG08[3]:SUSP mode Disable
**** REG08[1]:Enable charging or discharge
**** REG08[0]:BFET is forced fully ON
**** REG09[6]:Charging Termination Enable
**** REG09[0]:2X Safety timer disabled
**** REG0A[7]:JEITA_ISET=50%
**** REG0A[6]:JEITA_vSET=150mV
**** REG0A[5-4]:NTC Protection Type=JEITA
**** REG0A[3-2]:NTC_WARM threshold=56.1%
**** REG0A[1-0]:NTC_COOL threshold=68.6%
**** REG0B[5]:Reflect the battery charge current
**** REG12[1-0]:Control bits