BQ24450 Datasheet, PDF (3/20 Pages) Texas Instruments – INTEGRATED CHARGE CONTROLLER FOR LEAD-ACID BATTERIES

bq24450
www.ti.com ..................................................................................................................................................................................................... SLUS929 – APRIL 2009
ELECTRICAL CHARACTERISTICS
Over junction temperature range –40°C ≤ T_J ≤ 70°C, V_IN = 10V, T_J = T_A. (Positive currents are into, and negative currents out
of, the specified terminal)
INPUT
UVLO
V_HYS-UVLO
PARAMETER
Input power detected threshold
Hysteresis on UVLO
I_IN
Operating current
INTERNAL REFERENCE (V_REF)
V_REF
Reference voltage level
dV_REF/dT
Temperature coefficient of V_REF
ΔV_REF
Line regulation of VREF
VOLTAGE AMPLIFIER
I_VFB
Input bias current
A_OV
Open-loop gain
V_O
Output voltage swing (above GND or below V_IN)
CURRENT LIMIT AMPLIFIER
I_IFB
Input bias current
V_ILIM
Threshold voltage (wrt V_IN)
ΔV_ILIM
Sensitivity of V_ILIM to V_IN
DRIVER TRANSISTOR
V_CE
I_DRVE-MAX
PRE-CHG
Minimum collector to emitter differential
Maximum output current
I_PRE
Maximum output current VPRE = VIN - 3V
V_PRE
Maximum output voltage (V_IN – V_PRE-CHG)
V_PRE-REV
PRE-CHG reverse hold-off voltage
ENABLE COMPARATOR
V_TH-CE
Threshold voltage (x V_REF)
I_CE
Input bias current
CURRENT SENSE COMPARATOR
I_IB-ISNS
Input bias current
I_OS-ISNS
Input offset current
V_ISNS
Threshold voltage (V_ISNSP – V_ISNSM)
ΔV_ISNS/ΔV_IN Threshold sensitivity to V_IN
ΔV_ISNS/Δ_VCM Threshold sensitivity to common-mode voltage
I_ISNS
Maximum sink current, ISNS pin
V_ISNS-SAT
Saturation voltage, ISNS pin
VOLTAGE SENSE COMPARATOR
V_VSNS
Threshold voltage (x V_REF)
INPUT LOGIC LEVELS – BSTOP
V_TH-BS
Threshold voltage
I_PU-BS
Internal pull-up current
OUTPUT LOGIC LEVELS – STAT1, STAT2, PGOOD
I_SINK-MAX
Maximum sink current
V_SAT
Output saturation voltage
I_lkg
Leakage current
TEST CONDITIONS
V_IN increasing from 0V to 5V
V_IN decreasing from 5V to 0V
V_IN = 10V
V_IN = 40V
V_IN = 40V, T_A = –40°C to 85°C
Measured as regulating level on VFB pin
when device is in FLOAT mode.
T_J = 25°C
V_IN = 5V to 40V
V_VFB = 2.30V
Driver current = 1mA
V_IN = 5V to 40V
V_DRVC = V_IN, I_DRVE = 10mA
V_DRVC – V_DRVE = 2 V
I_PRE = –10mA
V_IN = 0 V, I_PRE = –10µA
V_IN = 5V to 40V
V_CM = 2V to VIN
V_ISNS = 2 V
I_ISNS = 10 mA
L1 = RESET
L1 = SET
V_BSTOP = V_TH-BS
V_PIN = 2V, output transistor ON
I_SINK = 1.6 mA
I_SINK = 50 µA
V_PIN = 40V, output transistor OFF
MIN TYP MAX UNIT
4.2
4.5
4.8
V
200
300
mV
1.6
3.3
1.8
3.6 mA
1.8
4
2.275 2.300 2.325
V
–3.5
mV/°C
3
8 mV
–500 –200
nA
50
65
dB
200
mV
0.2
1
µA
225
250
275
mV
0.03 0.25 %/V
2
2.2
V
25
40
mA
–40
–25
2
6.3
mA
2.6
V
7
V
0.99 1.00 1.01 V/V
–500 –200
nA
100
500
nA
10
200
nA
20
25
30 mV
0.05 0.35 %/V
0.05 0.35 %/V
25
40 mA
200
450
mV
0.94
0.895
0.95 0.96
0.90 0.910
0.7
1
1.3
V
10
µA
2.5
5
mA
250
450
mV
30
50 mV
1
3
µA
Copyright © 2009, Texas Instruments Incorporated
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