Texas Instruments BQ25886, User Manual

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V VM#1
Battery
Simulator
or Power
Supply
BS#1
VM#2
VM#3
V VM#4
AGND
AGND
V V
Resistive
or e-Load
Load#1
V VM#5
Test Summary
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8 SLUUC11 – February 2019
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Copyright © 2019, Texas Instruments Incorporated
BQ25886 QFN Standalone boost-mode battery charger evaluation module
Advance Information
2.3 OTG Mode
2.3.1 OTG Mode Test Setup
Use the following list to set up the equipment for boost mode operation:
1. Ensure that the electronic load and battery simulator are turned off when connecting to the EVM.
shows the test setup for when in OTG mode, including the jumper settings per Table 2 .
Figure 3. BQ25886 OTG Mode Test Setup
2. Voltmeters 1 through 3 (VM1, VM2, and VM3) connect to Kelvin test points for measuring VBUS, SYS,
and BAT as close to the IC pins as possible. Voltmeters 4 through 5 measure the voltage across 0.01
Ω , which gives the current.
3. Set BS#1 to 7.6 V and at a 6-A current limit, then turn off BS#1 and attach to the J4 (BAT, GND)
terminal of the EVM.
4. With electronic load disabled, attach to the J1 (VBUS, GND) terminal of the EVM.
5. Place shunt on JP8 to pull OTG pin high to enable OTG mode.
2.3.2 OTG Mode Test Procedure
Use the following steps for boost mode verification:
1. Measure on VM2 → V(TP1 (VBUS), TP26 (AGND)) = 5.1 V ±160 mV. Voltage of 10 mV is added to
account for DMM accuracy.
2. Set electronic load in CC mode to 500 mA, or resistive load to 10 Ω .
3. Measure on VM2
→
V(TP1 (VBUS), TP26 (AGND)) = 5.1 V ±160 mV. Voltage of 10 mV is added to
account for DMM accuracy.
4. Turn off and disconnect BS#1, Load#1, and voltmeters.