BQ24742 Datasheet, PDF (6/35 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
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
SW
PVCC, ACP, ACN, CSP, CSN, BAT
REGN, LODRV
Voltage range
VREF
VDAC
VADJ, ACSET, ISET, ACDET, FSET, IADAPT, LPMOD, LPREF, CE, CELLS,
EXTPWR, DPMDET, TRICKLE
BTST, HIDRV with respect to AGND and PGND
AGND, PGND
Maximum difference voltage: ACP–ACN, CSP–CSN
Junction temperature range
Storage temperature range
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MIN NOM MAX UNIT
–0.8
24 V
0
24 V
0
6.5 V
3.3
V
3.6
V
0
5.5 V
0
30 V
–0.3
0.3 V
–0.3
0.3 V
–40
125 °C
–55
150 °C
ELECTRICAL CHARACTERISTICS
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
OPERATING CONDITIONS
V_{PVCC_OP}
PVCC input voltage operating range
CHARGE VOLTAGE REGULATION
V_{BAT_REG_RNG}
V_{VDAC_OP}
V_{VADJ_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
Charge voltage regulation accuracy
12 V, 12.6 V, 13.536 V
16 V, 16.8 V, 18.048 V
CHARGE CURRENT REGULATION (ENABLE CE & DISABLE TRICKLE)
V_{IREG_CHG}
Charge current regulation differential
voltage range
V_{IREG_CHG} = V_CSP – V_CSN
V_{ISET_OP}
SRSET voltage range
V_{IREG_CHG} = 40 mV
V_{IREG_CHG} = 20 mV
Charge current regulation accuracy
V_{IREG_CHG} = 5 mV
V_{IREG_CHG} = 3 mV (V_BAT ≥ 4 V)
V_{IREG_CHG} = 3 mV (V_BAT < 4 V)
Off-set Voltage of Amplifier
V_BAT ≥ 4 V
V_BAT < 4 V
TRICKLE CHARGE CURRENT REGULATION (ENABLE CE & TRICKLE)
Charge Current Regulation Accuracy
Off-set Voltage of Amplifier
V_{IREG_CHG} = 3 mV
MIN TYP MAX UNIT
9
24
V
8
18.048
V
2.6
3.6
V
0
VDAC
V
–0.5
0.5
–0.5
0.5 %
–0.5
0.5
0
0
–3%
–5%
–25%
–33%
–50%
–1.0
–1.5
100 mV
VDAC
V
3%
5%
25%
33%
50%
1.0
mV
1.5
–33%
–1.0
33%
1.0 mV
(1) Verified by design
(2) Deglitch time and delay are proportional to the period of oscillator, unless specified.
(3) When CE=HIGH, the internal oscillator frequency is equal to external setting F_s; when CE=LOW, the internal oscillator frequency is fixed
internal setting 700 kHz.
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