Texas Instruments bq24010/2 manual 1. Load Test Board, Equipment Setup, Procedure

Test Procedure

2.2.1Equipment

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

Power Supply		UUT	DMM	S4	S1	S2
5.1 V ±	0.1 V
			Volts
Current Limit		bq24010/2 EVM
1 A ±	0.1 A	BAT+	BAT+
						R4
	+ DMM	DC+		C1
						66.5		Ω
				2000 µ F
	–	DC–				0.25 W
			BAT–	25 V
		BAT–
					R3
						8 7	6	5
					3 kΩ
					0.25 W
							4
					R6	3	2	1
					10 kΩ
					0.25 W

	S3
R5	D1
	1N4148
66.5 Ω
0.25 W
	8	7	6	5

Q1

Si4410DY

		4
R7	3	2	1
10 kΩ
0.25 W

R1

5Ω

5W

Q2

Si4410DY

2.2.2Equipment 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+.

2.2.3Procedure

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.

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