BQ24266_15 Datasheet, PDF (11/41 Pages) Texas Instruments – bq24266 3A, 30V Standalone Single-Input, Single-Cell Switchmode Li-Ion Battery Charger

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bq24266
SLUSBY5F – JUNE 2014 – REVISED AUGUST 2015
Electrical Characteristics (continued)
Circuit of , V_UVLO < V_IN < V_OVP AND V_IN > V_BAT+ V_SLP, T_J = –40°C to 125°C and T_J = 25°C for typical values (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OTG BOOST SUPPLY
I_{QBAT_ BOOST}
Quiescent current during
boost mode (BAT pin)
3.3V<V_BAT<4.5V, no switching
100
µA
Battery voltage range for
specified boost operation
VBAT falling
3.3
4.5
V
V_{IN_BOOST}
Boost output voltage (to pin
VBUS)
3.3V<V_BAT<4.5V over line and load
4.95
5.05
5.2
V
I_BO
Maximum output current for
boost
3.3V<V_BAT<4.5V
BOOST_ILIM = 1
BOOST_ILIM = 0
1000
500
mA
I_BLIMIT
Cycle by cycle current limit for
boost (measured at low-side 3.3V<V_BAT<4.5V
FET)
BOOST_ILIM = 1
4
A
BOOST_ILIM = 0
2
V_BOOSTOVP
Over voltage protection
threshold for boost (IN pin)
Signals fault and exits boost mode
5.8
6
6.2
V
t_{DGL(BOOST_OVP)}
Deglitch Time, VIN OVP in
Boost Mode
170
µs
V_BURST(ENT)
Upper V_IN voltage threshold to
enter burst mode (stop
switching)
5.1
5.2
5.3
V
V_BURST(EXIT)
Lower V_BUS voltage threshold
to exit burst mode (start
switching)
4.9
5
5.1
V
6.6 Switching Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
f_OSC
D_MAX
D_MIN
Oscillator frequency
Maximum duty cycle
Minimum duty cycle
MIN
TYP
MAX UNIT
1.35
1.5
1.65 Mhz
95%
0%
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