Texas Instruments bq24165, User Manual

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A
V
VM#2
CM#2
I
CHRG
PS
#1
A
V
VM#3
CM#1
I
IN
V
+
-
VM#1
+
-
+
-
-
- +
+
VM#4
V
+
-
BAT_Load
PS#2
Test Summary
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Figure 3. Original Test Setup for bq24165/166/167 EVM (HPA741)
2.4 Recommended Test Procedure
The following test procedure may be useful for evaluating the charger IC outside of a real system, if no
battery is available to connect to the output and a simulated battery is needed.
2.4.1 Charge Voltage and Current Regulation of IN
1. Ensure that the Section 2.3 steps are followed.
2. Move JP2 (CE1 or CE) = HI and JP6 = HI.
3. Connect the output of Power Supply #1 (PS #1) in series with current meter number 1 (CM1) to J2 (IN,
GND).
4. Connect voltage meter number 1 (VM1) across J1 or TP1 and J3 or TP6 (IN, GND).
5. With PS2 disabled, turn on PS1.
6. Measure:
Measure on VM3 → V(J5/TP4(SYS),J9(GND)) = 4.3 ± 100 mV
Measure on VM4 → V(J13(DRV),J15(GND)) = 5.2 ± 200 mV
7. Move JP2 (CE1 or CE) = LO and JP6 = LO. Adjust the power supply so that VM1 still reads 6 V ± 100
mV if necessary.
8. Enable PS2 and adjust PS2 so that the voltage measured by VM2, across BAT and GND, measures
3.2 V + 50 mV
9. Measure and Observe:
Measure on CM2 → I
CHRG
= 2500 mA ± 150 mA
Measure on CM1 → I
IN
= 1800 mA ± 180 mA
Observe → D1 and D2 are on.
10. Turn off PS1 and PS2.
8 Chipscale-Packaged bq24165, 24166, 24167 Evaluation Modules SLUU497B – December 2011 – Revised June 2012
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