BQ24740_07 Datasheet, PDF (8/32 Pages) Texas Instruments – Host-controlled Multi-chemistry Battery Charger with Low Input Power Detect

bq24740
SLUS736 – DECEMBER 2006
www.ti.com
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
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
2V
–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
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}
Output current limit
C_{IADAPT_MAX}
Maximum output load capacitance
ACDET COMPARATOR
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
24 V
0
2V
0
1 mA
20
V/V
–2
2
–3
3
%
–25
25
–30
30
1
mA
100 pF
V_{PVCC-BAT_OP}
V_{ACDET_CHG}
Differential Voltage from PVCC to BAT
ACDET adapter-detect rising threshold
V_{ACDET_CHG_HYS} ACDET falling hysteresis
ACDET rising deglitch⁽¹⁾
Min voltage to enable charging,
V_ACDET rising
V_ACDET falling
VACDET rising
–20
24 V
2.376 2.40 2.424 V
40
mV
518 700 908 ms
ACDET falling deglitch
VACDET falling
10
µs
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
ACDET rising deglitch ⁽¹⁾
ACDET falling deglitch
INPUT OVERVOLTAGE COMPARATOR (ACOV)
V_ACDET falling
V_ACDET rising
V_ACDET falling
20
mV
10
µs
10
V_ACOV
AC Over-voltage rising threshold on
ACDET
(See ACDET in erminal Functions)
3.007 3.1 3.193 V
V_{ACOV_HYS}
AC Over-voltage rising deglitch
AC Over-voltage falling deglitch
1.3
ms
1.3
(1) Verified by design.
8
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