Texas Instruments SLUU083A 用户手册

2-2

The bq2400X EVM board requires a DC power source to provide input power
and a single-cell lithium-ion or lithium-polymer battery to charge.

Other versions of the bq2400x IC can charge two-cell battery packs.

The test setup connections and jumper setting selections are listed below.

J1–VCC

Power source positive output

J1–GND

Power source negative output

J9–+

Positive lead of single lithium cell

J9– –

Negative lead of single lithium cell

J9 – VSENSE

Tie to battery’s positive terminal

J10 – THERM

Tie to thermistor lead in battery pack

J10 – GND

Tie to other thermistor lead (may be GND)

J3

1-A charge, use two jumpers placed horizontally; no jumpers on J4

J4

0.5-A charge, use two jumpers placed horizontally, no jumpers on J3

J2

Adapter power good (APD) or battery’s thermistor

J5

†

Enable, on or off

J6

Regulation voltage, 4.2 V or 4.1 V (single cell), 8.4 V or 8.2 V (double cell)

J7

Timer, 3-hour (float, no jumper), 4.5-hour, or 6-hour

J8

Stat2 green diode, connect for bq24002/3/5/6/8

‡

† This jumper enables/disables the IC for bq24001/2/3/4/5/6. For bq24007/8, this jumper enables/

disables the change timer.

‡ For bq24003/6/8 the evaluation board used two LED (red and green) in place of a single

dull-color LED. Therefore, when both LEDs are lit a yellow status is indicated.

Set up the evaluation board as described above, by making the necessary I/O
connections and jumper selections.

Before test and evaluation, it is important to verify that the maximum power
dissipation on the IC is not exceeded. Pmax = 2.3 W.

P

diss, single cell

 = (V

I

 – 3 V) 

×

 I

CHG

      where V

I

 = V

CC

 –0.1 V