BQ24751RHDRG4 Datasheet, PDF (7/38 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger

bq24751
www.ti.com............................................................................................................................................... SLUS734D – DECEMBER 2006 – REVISED MARCH 2009
ELECTRICAL CHARACTERISTICS (continued)
7.0 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
INPUT CURRENT REGULATION
V_{IREG_DPM}
Adapter current regulation differential V_{IREG_DPM} = V_ACP – V_ACN
voltage range
0
100 mV
V_{ACSET_OP}
ACSET voltage range
Input current regulation accuracy
VREF REGULATOR
V_{IREG_DPM} = 40–100 mV
V_{IREG_DPM} = 20 mV
V_{IREG_DPM} = 5 mV
V_{IREG_DPM} = 1.5 mV
0
VDAC
V
–3
3
–5
5
%
–25
25
–33
33
V_{VREF_REG}
VREF regulator voltage
I_{VREF_LIM}
VREF current limit
REGN REGULATOR
V_ACDET > 0.6 V, 0-30 mA
V_VREF = 0 V, V_ACDET > 0.6 V
3.267 3.3 3.333
V
35
75 mA
V_{REGN_REG}
REGN regulator voltage
I_{REGN_LIM}
REGN current limit
ADAPTER CURRENT SENSE AMPLIFIER
V_ACDET > 0.6 V, 0-75 mA, PVCC > 10 V
V_REGN = 0 V, V_ACDET > 0.6 V
5.6 5.9
90
6.2
V
135 mA
V_{ACP/N_OP}
V_IADAPT
I_IADAPT
A_IADAPT
Input common mode range
IADAPT output voltage range
IADAPT output current
Current sense amplifier voltage gain
Adapter current sense accuracy
I_{IADAPT_LIM}
Output current limit
C_{IADAPT_MAX}
Maximum output load capacitance
ACDET COMPARATOR
Voltage on ACP/ACN
A_IADAPT = V_IADAPT / V_{IREG_DPM}
V_{IREG_DPM} = 40–100 mV
V_{IREG_DPM} = 20 mV
V_{IREG_DPM} = 5 mV
V_{IREG_DPM} = 1.5 mV
V_IADAPT = 0 V
For stability with 0 mA to 1 mA load
0
0
0
20
–2
–3
–25
–33
1
24
V
2
1 mA
V/V
2
3
%
25
33
mA
100
pF
V_{ACDET_CHG}
ACDET adapter-detect rising
threshold
Min voltage to enable charging, V_ACDET
2.376 2.40 2.424
V
rising
V_{ACDET_CHG_HYS} ACDET falling hysteresis
ACDET rising deglitch
V_ACDET falling
VACDET rising
40
518 700
mV
908 ms
ACDET falling deglitch
VACDET falling
7
9
11 ms
V_{ACDET_BIAS}
ACDET enable-bias rising threshold Min voltage to enable all bias, V_ACDET
rising
0.56 0.62 0.68
V
V_{ACDET_BIAS_HYS} Adapter present falling hysteresis
V_ACDET falling
ACDET rising deglitch
V_ACDET rising
ACDET falling deglitch
V_ACDET falling
PVCC / BAT COMPARATOR (REVERSE DISCHARGING PROTECTION)
20
mV
10
µs
10
µs
V_{PVCC-BAT_OP}
Differential Voltage from PVCC to
BAT
–20
24
V
V_{PVCC-BAT_FALL} PVCC to BAT falling threshold
V_PVCC – V_BAT to turn off ACFET
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)
140 185
50
7
9
6
240 mV
mV
11 ms
µs
V_UVLO
V_{UVLO_HYS}
AC Under-voltage rising threshold Measured on PVCC
AC Under-voltage hysteresis, falling
3.5
4
260
4.5
V
mV
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