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Test Procedure
2-4
2.2.1 Equipment
1) Power source: current-limited 5-V lab supply with its current limit set to
1.0 A ±0.1 A
2) Two Fluke 75, equivalent or better
3) Oscilloscope – TDS220 or better
4) Load test board (See Figure 2–1.)
Figure 2–1. Load Test Board
C1
2000 µF
25 V
8
Power Supply
5.1 V ± 0.1 V
Current Limit
1 A ± 0.1 A
+
–
DMM
DC+
DC–
UUT
bq24010/2 EVM
BAT+
BAT–
BAT+
BAT–
DMM
Volts
S4
R3
3 kΩ
0.25 W
S1
R6
10 kΩ
0.25 W
S2
R4
66.5 Ω
0.25 W
7 6 5
R5
66.5 Ω
0.25 W
Q1
Si4410DY
3 2 1
D1
1N4148
S3
R7
10 kΩ
0.25 W
8 7 6 5
Q2
Si4410DY
3 2 1
44
R1
5 Ω
5 W
2.2.2 Equipment Setup
1) Connect the load board to the BAT+ and BAT–. Set SW1 through SW4 in
the closed position.
2) Connect a voltage meter to the BAT+/BAT– output to monitor the output
voltage (Range is 0 to 5 V).
3) Set the lab supply for 5.1 V ±0.1VDC, 1.0 ±0.1 A current limit and then turn
off supply. Connect the source supply to a current meter and to J1, noting
polarity. (You may use an internal source current meter if it has 5% or
better accuracy.)
4) Install shunt jumpers on the LED pins 1 and 2 of each header J4, J5, and
J6.
5) Connect the scope to the output, BAT+.
2.2.3 Procedure
1) Ensure that equipment setup steps are followed. (Switches should be in
the closed position, shunts installed, and power source set to 5.1V/-0.1V.
Turn on the power source.
2) Verify that output voltage BAT+ charges up to between 2.5 V and 2.9 V,
and the red LED (D1) and green LED (D3) are lit.
3) Open switch SW2, and then close switch SW2.