SLUU110A Datasheet, PDF (10/21 Pages) Texas Instruments – BQ2004/5/6 DUAL-CELL LI-LON CHARGER

Setup
2.1 Setup
The bq24004/5/6 EVM board requires a dc power source 9–10VDC, ≥ 1.1 A
or equivalent to provide input power and a dual-cell lithium-ion or
lithium-polymer battery to charge. Adjust the power supply for 9.1 ±0.1 VDC
and set the current limit to 1.3 A ±0.2 A. Power down the supply.
Note:
bq24005/6 ICs can be evaluated by replacing reference designator U1 with
the desired version. Refer to the IC data sheet for the correct status display
and the BOM for the correct status components (D1, D2, U2, J6).
The test setup connections and jumper setting selections are listed below.
2.1.1 I/O Connections
Jack
J1 – VCC
J1 – DC–
J7 – BAT+
J7 – BAT–
J7 – VSENSE
J8 – THERM
J8 – DC–
Connect to:
Power source positive output
Power source negative output
Positive lead of dual lithium-ion cell
Negative lead of dual lithium-ion cell
Tie to battery’s positive terminal
Tie to thermistor lead in battery pack
Tie to other thermistor lead (may be same wire as BAT–)
2.1.2 Jumper-Selectable Configuration (Factory Set to Bold Selections)
Jumper Selection
J2
Adapter power good (APG) or battery thermistor, APG/THRM
J3
Enable, on or off
J4
Regulation voltage per cell, 4.2 V or 4.1 V
J5
Timer, 3-hour (float, no jumper), 4.5-hour, or 6-hour
J6
Stat2 green diode, jumper for bq24005/6
2.2 Test Procedures
2.2.1 For Two-Cell Applications
Set up the evaluation board as described above, by making the necessary I/O
connections and jumper selections.
Note:
Before test and evaluation, it is important to verify that the maximum power
dissipation on the IC is not exceeded. P_max = 2.3 W.
P_{diss, 2 cell} = (V_I – 6.8 V) × I_CHG where V_I = V_CC –0.1 V
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