Texas Instruments bq24013 - Manual (Page 12)

Test Procedure
2-4
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 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 the 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 and J5.
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 5.1 V/
±
0.1
V.) 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) is lit.
3) Open switch SW2 and then close swtch SW2.
4) Verify that output voltage BAT+ settles between 3.2 V and 3.95 V.
5) Verify that the input current is between 0.69 A and 0.75 A.
6) Open switch SW3.
7) Verify that the input current is between 100 mA and 150 mA.
8) Verify the output voltage BAT+ is between 4.150 V and 4.250 V.
9) Open switch SW2.
10) Verify with a scope (250 ms/div, 1 V/div) that output BAT+ charges and
discharges are between the maximum limits of 3 V and 4.35 V, with a
period of between 600 ms and 850 ms.
11) Verify that the LEDs flash between RED (D1) and GREEN (D2), mostly on
green.
12) Open switch SW4, and verify that D1 and D2 are off.
13) Verify, with a scope on BAT+, a square wave between the maximum limits
of 1.3 VDC and 4.35 VDC and a frequency between 3.5 Hz and 4.5 Hz.
This step verifies operation of the battery-detect circuit and the
internal-timer oscillator.
14) Turn off the power source and set all switches, SW1 through SW4, closed.
15) The EVM is good if all tests are passed.