BQ24705 Datasheet, PDF (6/30 Pages) Texas Instruments – Host-Controlled Multi-Chemistry Battery Charger With Low Input Power Detect

bq24705
SLUS779 – DECEMBER 2007
www.ti.com
ELECTRICAL CHARACTERISTICS
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
OPERATING CONDITIONS
V_{PVCC_OP}
PVCC Input voltage operating range
CHARGE VOLTAGE REGULATION
5
24 V
V_{BAT_REG_RNG}
V_{ADJ_OP}
BAT voltage regulation range
VADJ voltage range
4V-4.512V per cell, times 2,3,4 cell
8 V, 8.4 V, 9.024 V
8
0
–0.5%
18 V
REGN V
0.5%
Charge voltage regulation accuracy
12 V, 12.6 V, 13.536 V
–0.5%
0.5%
16 V, 16.8 V, 18.048 V
–0.5%
0.5%
Charge voltage regulation set to default to VADJ connected to REGN, 8.4 V, 12.6
4.2 V per cell
V, 16.8 V
–0.5%
0.5%
CHARGE CURRENT REGULATION
V_{IREG_CHG}
Charge current regulation differential
voltage range
V_{IREG_CHG} = V_SRP – V_SRN
0
100 _mV
V_{SRSET_OP}
SRSET voltage range
Charge current regulation accuracy
INPUT CURRENT REGULATION
V_{IREG_CHG} = 40–100 mV
V_{IREG_CHG} = 20 mV
V_{IREG_CHG} = 5 mV
V_{IREG_CHG} = 1.5 mV
0
–3%
–5%
–25%
–33%
VDAC V
3%
5%
25%
33%
V_{IREG_DPM}
Adapter current regulation differential
voltage range
V_{IREG_DPM} = V_ACP – V_ACN
0
200 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
–3%
–5%
–25%
–33%
2V
3%
5%
25%
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
35
3.3 3.333 V
75 mA
V_{REGN_REG}
REGN regulator voltage
V_ACDET > 0.6 V, 0-75 mA,
PVCC > 10 V
5.6 5.9 6.2 V
I_{REGN_LIM}
REGN current limit
ADAPTER CURRENT SENSE AMPLIFIER
V_REGN = 0 V, V_ACDET > 0.6 V
90
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}
C_{IADAPT_MAX}
Output current limit
Maximum output load capacitance
Voltage on ACP/SRN
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
–2%
–3%%
–25%
–30%
1
24 V
2V
1 mA
20
V/V
2%
3%
25%
30%
mA
100 pF
6
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