BQ24751B Datasheet, PDF (6/38 Pages) Texas Instruments – Host-Controlled Multi-Chemistry Battery Charger with Low Iq and System Power Selector

Not Recommended For New Designs
bq24751B
SLUS835A – JULY 2008 – REVISED MARCH 2009 .......................................................................................................................................................... www.ti.com
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
PH
PVCC, ACP, ACN, SRP, SRN, BAT, BATDRV, ACDRV
Voltage range
REGN, LODRV
VDAC, IADAPT
VREF
ACSET, SRSET, TS, ACDET, ACOP, CHGEN, CELLS, ACGOOD, LEARN,
OVPSET
VADJ
BTST, HIDRV with respect to AGND and PGND
AGND, PGND
Maximum difference
voltage
ACP–ACN, SRP–SRN
Junction temperature range, T_J
Storage temperature range, T_stg
MIN NOM MAX UNIT
–1
24 V
0
24 V
0
6.5 V
0
3.6 V
3.3
V
0
5.5 ^V
0
6.5 V
0
30 V
–0.3
0.3 V
–0.3
0.3 V
–40
125
°C
–55
150
ELECTRICAL CHARACTERISTICS
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
OPERATING CONDITIONS
V_{PVCC_OP}
PVCC Input voltage operating range
CHARGE VOLTAGE REGULATION
5
24
V
V_{BAT_REG_RNG}
V_{VDAC_OP}
V_{ADJ_OP}
BAT voltage regulation range
VDAC reference voltage range
VADJ voltage range
4-4.512 V per cell, times 2,3,4 cells
8 V, 8.4 V, 9.024 V
8
2.6
0
–0.5%
18.048
V
3.6
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 4.2 V per cell
VADJ connected to REGN, 8.4 V, 12.6 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 (V_BAT>4V)
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
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
–3%
–5%
–25%
–33%
VDAC
V
3%
5%
25%
33%
V_{VREF_REG}
I_{VREF_LIM}
VREF regulator voltage
VREF current limit
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
80
mA
6
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