I/O And Jumper Connections; Test Procedure - Texas Instruments bq24013 User Manual

I/O and Jumper Connections

2.1 I/O and Jumper Connections
Jack
J1–DC+
J1–DC–
J2–BAT+
J2–BAT–
J2–TTE
J2–BAT–
J3–STAT1
J3–STAT2
J3–DC–
J3–/CE
J4 (Jumper)
J5 (Jumper)

2.2 Test Procedure

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: P
1) Turn on the power supply, which was preset to 5.0 VDC and 1 A for the
2) The bq24013 enters preconditioning mode if the battery is below the
3) Once the battery voltage is above the V
4) Once the battery reaches voltage regulation (4.2 V), the current tapers
5) The battery remains at the fast-charge mode until the fast-charge timer
6) If the battery discharges to the recharge threshold, the charger starts fast
In place of a battery, a source meter that can sink current can easily be
adjusted to test each mode.
2-2
Connect To:
Power supply positive, preset to 5.0VDC, 1-A current limit
Power supply ground
Positive battery pack terminal
Negative battery pack terminal
NC required—pulled down with 10 k resistor on EVM
NC
External hardware if J4-EXT is jumpered (not jumpered from factory)
External hardware if J5-EXT is jumpered (not jumpered from factory)
Return for J3 signals
NC required—pulled down with 10-k resistor on EVM
STAT1 indication location – LED (EVM) | EXT
STAT2 indication location – LED (EVM) | EXT
= 1.5 watts.
(MAX)
current-limit setting.
V threshold. In this mode, the bq24013 precharges the battery with
(LOWV)
a low current (typically I
O(CHG)
voltage reaches the V
(LOWV)
expires. If the timer expires, then the charge current is terminated, the
bq24013 enters fault mode, and both LEDs turn off. Toggling input power
or battery replacement resets fault mode.
enters fast-charge mode. This EVM is programmed for 0.7 A of
fast-charging current.
down as the battery reaches its full capacity.
expires, the charge taper time expires, or the charge termination threshold
is reached.
charging.
/10 = 0.7A/10 = 70 mA) until the battery
threshold or until the precharge timer
threshold, the battery
(LOWV)