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4 recommended operating conditions, 2 equipment, 1 power supplies – Texas Instruments BQ24450EVM User Manual

Page 3: 2 loads, 3 meters, 3 equipment setup

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Equipment

1.4

Recommended 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

2.1

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)

3

SLUU464 – November 2010

bq24450EVM

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