BQ24742 Datasheet, PDF (8/35 Pages) Texas Instruments – Li-Ion or Li-Polymer Battery Charger with Low Iq and Accurate Trickle Charge

bq24741, bq24742
SLUS875B – MARCH 2009 – REVISED OCTOBER 2009
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ELECTRICAL CHARACTERISTICS (continued)
9.0 V ≤ V_PVCC ≤ 24 V, 0°C < T_J < +125°C, F_s=600 kHz, typical values are at T_A = 25°C, with respect to AGND (unless
otherwise noted) ^{(1) (2) (3)}
PARAMETER
TEST CONDITIONS
PVCC / BAT COMPARATOR
V_{PVCC_BAT_OP}
V_{PVCC-BAT_FALL}
V_{PVCC-BAT__HYS}
Differential Voltage from PVCC to BAT
PVCC to BAT falling threshold
PVCC to BAT hysteresis
PVCC to BAT rising deglitch
PVCC to BAT falling deglitch
BAT OVERVOLTAGE COMPARATOR
V_{OV_RISE}
V_{OV_FALL}
Overvoltage rising threshold⁽⁵⁾
Overvoltage falling threshold⁽⁵⁾
BATSHORT COMPARATOR
V_PVCC – V_BAT to disable charge
V_PVCC – V_BAT > V_{PVCC-BAT_RISE}
V_PVCC – V_BAT < V_{PVCC-BAT_FALL}
As percentage of V_{BAT_REG}
As percentage of V_{BAT_REG}
V_{BATSHORT_RISE}
V_{BATSHORT_FALL}
Battery rising voltage for BATSHORT exit
Battery falling voltage for BATSHORT
entry
CHARGE OVERCURRENT COMPARATOR
V_{OC_peak}
Peak charge over-current threshold
MOSFET SHORT PROTECTION COMPARATOR
V_{(CSP- CSN)}, when V_ISET / VDAC < 0.8
V_{(CSP- CSN)}, when V_ISET / V_DAC ≥ 0.8
V_HS
High-side Threshold (bq24741)
Measured on ACP-SW
V_HS
High-side Threshold (bq24742)
Measured on ACP-SW
V_LS
Low-side Threshold
Measured on SW-AGND
CHARGE UNDERCURRENT PROTECTION COMPARATOR (UCP)
V_UCP
Charge under-current threshold, falling
edge
V_{(CSP- CSN)} from synchronous to non-synchronous
operation
Charge under-current threshold, rising
edge
V_(CSP-CSN) from non-synchronous to synchronous
operation
Charge under-current rising deglitch
Charge under-current falling deglitch
INPUT OVERVOLTAGE COMPARATOR (ACOV)
V_ACOV
AC over-voltage rising threshold on
ACDET
Measure on ACDET pin
V_{ACOV_HYS}
AC over-voltage deglitch (rising edge)
AC over-voltage deglitch (falling edge)
INPUT UNDERVOLTAGE LOCK-OUT COMPARATOR (UVLO)
V_UVLO
AC under-voltage rising threshold
V_{UVLO_HYS}
AC under-voltage hysteresis
INPUT LOW POWER MODE COMPARATOR (LPMOD)
Measured on PVCC pin
V_{ACLP_HYS}
AC low power mode comparator internal
hysteresis
V_{ACLP_OFFSET}
AC low power mode comparator offset
voltage
THERMAL SHUTDOWN COMPARATOR
T_SHUT
Thermal shutdown rising temperature
T_{SHUT_HYS}
Thermal shutdown hysteresis, falling
PWM HIGH SIDE DRIVER (HIDRV)
Temperature Increasing
R_{DS_HI_ON}
R_{DS_HI_OFF}
V_{BTST_REFRESH}
High side driver turn-on resistance
High side driver turn-off resistance
Bootstrap refresh comparator threshold
voltage
V_BTST – V_SW = 5.5 V, tested at 100 mA
V_BTST – V_SW = 5.5 V, tested at 100 mA
V_BTST – V_SW when low side refresh pulse is
requested
I_{BTST_LEAK}
BTST leakage current
High side is on; charge enabled
MIN TYP MAX
-20
24
850 900
950
200 225
250
4.5
10
104%
102%
2
1.7
90 110
130
100 125
150
120 250
455
475 750 1065
90 160
320
25 30
35
35 40
45
10
320
3.007 3.1 3.193
650
650
7
8
9
260
5%
7%
1
155
20
6
1.4
4
200
(5) Verified by design
UNIT
V
mV
mV
ms
μs
V/Cell
V/Cell
mV
mV
mV
mV
mV
mV
mV
μs
μs
V
μs
μs
V
mV
mV
°C
°C
Ω
Ω
V
μA
8
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