Texas Instruments bq24072RGTR, User Manual

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OUT
J2
IN
GND
R8-ILIM
TMR
J1
5.25 VDC
J4
J3
EN1
JMP5
JMP4
EN2
CE
JMP3
VSS
VSS BA
T+
VSS TS
R16-TS
JMP2
JMP2
R10-ITERM R11-ISET
VSS = GND
TD
bq24072/3/4/5 EVM
HPA282 - UUT
or
bq24079 (T)
R1
10 W
DMM
#2
DMM
#1
DMM
#3
R2
0.1 W
4.2VLi-IonCell
P/S
#1
CH 1
CH 2
CH 4
CH 3
Test Summary
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Table 3. bq240xx
Jumper '72 '73 or '230 '74 or '232 '75
JMP1 RES–TMR RES–TMR RES–TMR RES–TMR
JMP2 TD–Vss TD–Vss TD–Vss TD–Vss
JMP3 CE–Vss CE–Vss CE–Vss CE–Vss
JMP4 EN2–HI EN2–HI EN2–HI EN2–HI
JMP5 EN1–Vss EN1–Vss EN1–Vss EN1–Vss
Figure 1. Test Diagram
4.3 Test Procedure
1. Verify that the equipment and EVM is set up according to the preceding section.
2. Verify that V
OUT
is approximately equal to V
BAT
3. Turn on P/S#1, +5.25-Vdc supply to the UUT.
4. Verify V
BAT
is between 2.4 Vdc and 3 Vdc, and the charger is in precharge state: LEDs CHG (D1) and
PGOOD (D2) are on. If V
BAT
is above the low-voltage threshold (V
(LOWV)
~3 V), then the IC is in
fast-charge mode. If the IC is in fast charge, skip step 7.
5. Verify DMM#3, I
BAT
is ~9 mV or ~0.09 A
6. Verify that V
OUT
for bq24072 is ~200 mV above the battery voltage or a minimum of 3.4 Vdc. For
bq24073/4 verify that V
OUT
is ~4.4 Vdc. Verify that bq24075/9(T) is ~5.5 Vdc for V
IN
> 5.6 V and equal
to V
IN
for Vin < 5.6 V.
7. Allow the battery to charge until V
BAT
is between 3.3 Vdc and 4 Vdc. The charger delivers the
programmed constant current to the battery unless the input cannot source the required current.
8. Verify I
BAT
is ~88 mV or ~0.9 A (for a 1-k Ω resistor on ISET).
9. Verify V
OUT
: bq24072 – ~200 mV above the battery voltage.
10. Set JMP5 (EN1) to HI, and verify that the chip has been disabled, D1 (CHG) has turned off, and the
P/S#1 current has dropped to zero. The internal battery FET must be on, connecting the BAT pin to
the OUT pin. Verify that the voltage on the OUT pin is close to the battery voltage. See
Figure 2 for
4 bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion —and Li-Polymer SLVU274C – November 2008 – Revised May 2010
Charge Management IC EVM
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