Figure 2-6. Chip Configuration
3. Go to the Charger Configuration and set
• VSYSMIN to 7 V
• Charge Voltage to 8.4 V
• Charge Current to 0.5 A
• Precharge current to 0.24 A
• IINDPM to 3 A
• ABS VINDPM to 0.4 V
Figure 2-7. Charger Configuration
2.4.3 Charge Mode Verification
Use the following steps for charge mode verification, including pre-charge, CC and CV phases for boost
operation:
1. PS1 and Load #1 should be on from
. In the EVM GUI, it is generally recommended to
read REG22-REG27 (or READ ALL REGISTERS) one time in order to show all the interrupts (from status
changes, automated routine completion, faults) that occurred since the last read. Reading those registers a
second clears the interrupts. After reading the registers,
•
Verify
➡
REG1B reports all Normal, meaning no DPM loops active and no WD timer fault (bits 7-4),
VAC1 Present (bit2), VBUS Present (bit 0) and Power Good (bit 3)
2. Reinstall the shunt on jumper J17 to enable charge
•
Verify
➡
STAT LED (D13) is lit
3. Take measurements as follows, noting that you may have to adjust the output of the load to accommodate
for voltage drop across the leads from the load to the EVM:
•
Measure
➡
V
VBUS-PGND
(TP23 and TP44) = 5.0 V ±0.2 V
•
Measure
➡
V
BAT-PGND
(TP29 and TP46) = 5.0 V ±0.2 V
•
Measure
➡
I
BAT_SENSE
(voltage across 0.01 ohm resistor between TP19 and TP20) = 240 mA ±60 mA
•
Click READ ALL REGISTERS and Verify
➡
REG1Cb[7:5] reports pre charge
4. Increase Load #1 regulation voltage to 8.0 V and take measurements as follows, noting that you may have
to adjust the output of the load to accommodate for voltage drop across the leads from the load to the EVM:
•
Measure
➡
V
VBUS-PGND
(TP23 and TP44) = 5.0 V ±0.2 V
•
Measure
➡
V
BAT-PGND
(TP29 and TP46) = 8.0 V ±0.1 V
Test Setup and Results
SLUUCB5E – JUNE 2020 – REVISED JULY 2022
BQ25792EVM, BQ25798EVM and BQ25798BKUPEVM (BMS034) Evaluation
Module
11
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