BQ24740_07 Datasheet, PDF (7/32 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect

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RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
PH
PVCC, ACP, ACN, SRP, SRN, BAT
REGN, LODRV
VREF
Voltage range
VDAC, IADAPT
ACSET, SRSET, ACDET, ISYNSET, LPMD, LPREF, CHGEN, CELLS,
EXTPWR, DPMDET
VADJ
BTST, HIDRV with respect to AGND and PGND
AGND, PGND
Maximum difference voltage: ACP–ACN, SRP–SRN
Junction temperature range
Storage temperature range
bq24740
SLUS736 – DECEMBER 2006
MIN NOM MAX UNIT
–1
24
0
24
0
6.5
0
3.3
0
3.6
0
5.5
V
0
6.5
0
30
–0.3
0.3
5.5
–40
125
°C
–55
150
PACKAGE THERMAL DATA
PACKAGE
QFN– RHD⁽¹⁾
θ_JA
39°C/W
T_A = 70°C POWER RATING
2.36W
DERATING FACTOR ABOVE T_A = 25°C
0.028 W/°C
(1) This data is based on using the JEDEC High-K board and the exposed die pad is connected to a Cu pad on the board. This is
connected to the ground plane by a 2x3 via matrix.
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
5.0
24.0 V
V_{BAT_REG_RNG}
V_{VDAC_OP}
V_{ADJ_OP}
BAT voltage regulation range
VDAC reference voltage range
VADJ voltage range
Charge voltage regulation accuracy
4V-4.512V per cell, times 2,3,4 cell
8 V, 8.4 V, 9.024 V
8
2.6
0
–0.5
18 V
3.6 V
REGN V
0.5
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,
–0.5
4.2 V per cell
12.6 V, 16.8 V
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
V_{IREG_CHG} = 40–100 mV
V_{IREG_CHG} = 20 mV
V_{IREG_CHG} = 5 mV
V_{IREG_CHG} = 1.5 mV
0
VDAC V
–3
3
–5
5
%
–25
25
–33
33
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