Texas Instruments BQ24450EVM Recommended Operating Conditions, Power Supplies, Loads, Meters

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1.4Recommended Operating Conditions

Table 2. Recommended Operating Conditions

Symbol	Description	Min	Typ	Max	Unit
Vin, J1	Supply Voltage	9.5	10.0	10.5	V
Vout, J4	Battery Voltage (3-cell lead-acid battery)	4		7.5	V
Iin	Supply Current	0		0.5	A
Iout	Charge Current	0		0.5	A

2 Equipment

2.1Power Supplies

Power Supply #1 (PS#1): Adjustable from 0 to ≥ 10 VDC at ≥ 1A; used for input J1.

Power Supply #2 (PS#2): Adjustable from 0 to ≥ 10 VDC at ≥ 1.5A; used for Battery Load Board.

2.2Loads

Load #1: Battery Load Circuit Board, PR1010-2, as shown in Figure 2.

2.3Meters

Three Fluke 75 DMMs (equivalent or better).

3Equipment Setup

The original test setup of HPA691 is shown in Figure 1.

1.Set the PS #1 for 10V, 1A current limit and then turn off supply. Connect PS#1 across J1, J2 (VIN, GND).

2.Connect a voltage meter (VM #1) across J1, J2 (VIN, GND)

3.Set PS#2 to 5.2V and then turn off supply. Connect to the Battery Load Circuit Board (P/S+, P/S–)

4.Connect Load #1 (BAT+, BAT–) across J4, J5 (VOUT, GND).

5.Connect a voltage meter (VM#2) across J4, J5 (VOUT, GND).

6.Connect a voltage meter (VM#3) across sense resistor on Load #1.

7.Verify the jumpers are placed correctly as per, Figure 1.

Figure 1. Original Test Setup for HPA691 (bq24450 EVM)

SLUU464 –November 2010	bq24450EVM	3
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