BQ25050 Datasheet, PDF (18/28 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path

bq25050
SLUSA33 – MARCH 2010
Table 2. Pulse Counting Map for CTRL Interface (continued)
# OF PULSES
9
10
11
12
13-16
BGATE CONTROL
No Change
No Change
No Change
No Change
No Change
CURRENT LIMIT
654 mA
794 mA
935 mA
No Change
No Change
TS RANGE
No Change
No Change
No Change
0°C to 60°C
No Change
V_IN-DPM
No Change
No Change
No Change
No Change
Disabled
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If, at any time, the CTRL input is held high for more than 2ms, the IC is disabled. When disabled, charging is
suspended and the bq25050 input quiescent current is reduced.
# of pulses decoded once
CTRL pulled low for 2.0 ms
IC disabled if CTRL
pulled high for >2.0 ms
IC can be
programmed during
tWAIT
CTRL
tCTRL-DGL
t_HI
tCTRL-LATCH
2.0 ms
tCTRL-LATCH
2.0 ms
2.0 ms
tCTRL-LATCH
t_LO
Power up with default
285 mA current limit
475 mA current limit
programmed
190 mA current limit
I_IN
programmed
Figure 25. CTRL Timing Diagram
18
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