Use the following guidelines to set up the equipment:
- Set power supply 1 for 40 VDC, 6 A
current limit and then turn off the supply.
- Connect the output of power supply 1 in
series with a current meter to J1 (VIN and PGND).
- Connect a voltage meter across J1 (VIN)
and J1 (PGND).
- Connect load 1 in series with a current
meter to J3 (VBAT and PGND).
- Connect a voltage meter across J5 (VBAT
and PGND).
- Set 23.5 V at electronic load input.
- Connect J5 to the EV2400 and connect J5
to the I2C PORT 2 on the EV2400.
- Install the jumpers as indicated in IO
and Jumper Descriptions.
- Unplug Jumper 13.
- Turn on the computer and power supply 1.
Open the bqStudio software.
- Select Charger and click the
Next button.
- Select
Charger_1_00_BQ25750.bqz on the Select a Target Page.
- Click Field View after
selecting the target device and then click the Read Register button.
- Set WATCHDOG and EN_CHG to disabled.
- Set ICHG_REG to 4000 mA and IPRECHG to
1000 mA in the 16 Bit Registers field.
- Set EN_CHG to enabled and plug in Jumper
13.
- Set power supply 1 to 40 V, measure:
V(J1(VAC)) = 40 V ± 0.5 V
I(J1(IAC)) = 1.2 A ± 0.5 A
V(J3(VBAT))
= 23.5 V ± 0.5 V I(J3(IBAT)) = 2 A ± 0.5
A
- Set power supply 1 for 23 V, measure:
V(J1(VAC)) = 23 V ± 0.5 V
I(J1(IAC)) = 2.1 A ± 0.5 A
V(J3(VBAT))
= 23.5 V ± 0.5 V I(J3(IBAT)) = 2 A ± 0.5
A
- Set power supply 1 for 10 V, measure:
V(J1(VAC)) = 10 V ± 0.5 V
I(J1(IAC)) = 5 A ± 0.5 A
V(J3(VBAT)) =
23.5 V ± 0.5 V I(J3(IBAT)) = 2 A ± 0.5
A
Use the following guidelines to test the
BQ25750 EVM power path:
- Disconnect the power supply from J1 (VIN and PGND) and disconnect Load 1 from J3 (VOUT
and PGND).
- Connect the output of power supply 1 to J3 (VOUT and PGND).
- Set power supply 1 for 20 V DC, 8 A current limit and then turn off power supply.
- Connect a voltage meter across J2 (VSYS) and J2 (PGND).
- Turn on power supply 1, measure V(J2(VSYS)) = 20 V ± 0.5 V.