BQ24704 Datasheet, PDF (7/31 Pages) Texas Instruments – Low Cost, Host-Controlled Li-Ion and Li-Polymer Battery Charger With Low Iq

bq24704
www.ti.com........................................................................................................................................................................................................ SLUS838 – MAY 2009
ELECTRICAL CHARACTERISTICS (continued)
7 V ≤ V_PVCC ≤ 24 V, 0°C < T_J < +125°C, typical values are at T_A = 25°C, with respect to AGND (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
ACDET COMPARATOR
V_{PVCC-BAT_OP}
V_{ACDET_CHG}
Differential Voltage from PVCC to BAT
ACDET adapter-detect rising threshold
V_{ACDET_CHG_HYS} ACDET falling hysteresis
ACDET rising deglitch⁽²⁾
ACDET falling deglitch
V_{ACDET_BIAS}
ACDET enable-bias rising threshold
Min voltage to enable charging,
V_ACDET rising
V_ACDET falling
V_ACDET rising
V_ACDET falling
Min voltage to enable all bias, V_ACDET
rising
–20
24 V
2.376 2.40 2.424 V
40
mV
0.9 1.2 1.5
s
10
µs
0.56 0.62 0.68 V
V_{ACDET_BIAS_HYS} Adapter present falling hysteresis
ACDET_BIAS rising deglitch ⁽²⁾
V_ACDET falling
V_ACDET rising
ACDET_BIAS falling deglitch
V_ACDET falling
OPEN-DRAIN LOGIC OUTPUT PIN CHARACTERISTICS (ACGOOD)
20
mV
10
µs
10
V_O(LO)
Output low saturation voltage
ACGOOD falling delay
ACGOOD rising delay
PVCC / BAT COMPARATOR
Sink Current = 4 mA
V_ACDET rising
V_ACDET falling
0.5 V
0.9 1.2 1.5
s
10
µs
V_{PVCC-BAT_FALL} PVCC to BAT falling threshold
V_PVCC – V_BAT falling to disable
Charger
140 185 240 mV
V_{PVCC-BAT__HYS} PVCC to BAT hysteresis
PVCC to BAT Rising Deglitch
V_PVCC – V_BAT > V_{PVCC-BAT_RISE}
PVCC to BAT Falling Deglitch
V_PVCC – V_BAT < V_{PVCC-BAT_FALL}
INPUT UNDERVOLTAGE LOCK-OUT COMPARATOR (UVLO)
50
mV
7
9
11 ms
6
µs
UVLO
AC Undervoltage rising threshold
AC Undervoltage hysteresis, falling
Measure on PVCC
3.5
4
260
4.5 V
mV
BAT OVERVOLTAGE COMPARATOR
Overvoltage rising threshold ⁽²⁾
V_O
Overvoltage falling threshold ⁽²⁾
As percentage of V_{BAT_REG}
104%
102%
CHARGE OVERCURRENT COMPARATOR
V_OC
Charge overcurrent rising threshold
As percentage of I_{REG_CHG}
Minimum Current Limit (SRP-SRN)
145%
50
mV
THERMAL SHUTDOWN COMPARATOR
T_SHUT
Thermal shutdown rising temperature
T_{SHUT_HYS}
Thermal shutdown hysteresis, falling
PWM HIGH SIDE DRIVER (HIDRV)
Temperature Increasing
155
°C
20
R_DS(on)
V_{BTST_REFRESH}
High side driver turn-on resistance
High side driver turn-off resistance
Bootstrap refresh comparator threshold
voltage
V_BTST – V_PH = 5.5 V, tested at 100 mA
V_BTST – V_PH = 5.5 V, tested at 100 mA
V_BTST – V_PH when low side refresh
pulse is requested
3
6
Ω
0.7 1.4
4
V
(2) Specified by design.
Copyright © 2009, Texas Instruments Incorporated
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