Texas Instruments BQ24450EVM

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Equipment

1.4 Recommended Operating Conditions

Table 2. Recommended Operating Conditions

Symbol Description Min Typ Max Unit

Vin,J1 SupplyVoltage 9.5 10.0 10.5 V

Vout,J4 Battery Voltage (3-cell lead-acid battery) 4 7.5 V

Iin SupplyCurrent 0 0.5 A

Iout ChargeCurrent 0 0.5 A

2 Equipment

2.1 Power 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.

2.2 Loads

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

2.3 Meters

Three Fluke 75 DMMs (equivalent or better).

3 Equipment 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