BQ24901 Datasheet, PDF (3/18 Pages) Texas Instruments – SINGLE-CELL LI-ION AND LI-POL CHARGE MANAGEMENT IC FOR OFFLINE APPLICATIONS

bq24901
SLUS527 – DECEMBER 2002
ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature and supply voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
SUPPLY CURRENT
ICC(VCC) Input current
IIB(BAT) Input bias current on BAT pin
IIB(TS)
Input bias current on TS pin
IIB(SNS) Input bias current on SNS pin
IIB(TADJ) Input bias current on TADJ pin
BATTERY VOLTAGE and VCC REGULATION
VCC > VCC(min)
VI(BAT) > VO(REG), when not in charge
VI(TS) = 2.5 V
VCC = 6 V, VI(SNS) = 6 V when not in charge
VI(TADJ) = VREF
VO(REG) Output voltage
VCC
Supply voltage
CURRENT REGULATION
0°C ≤ TA ≤ 70°C
V(SNS)
Current regulation threshold
voltage
Input common mode range on
SNS pin
Voltage at pin SNS relative to BAT,
0°C ≤ TA ≤ 70°C, V(LOWV)≤V(SNS)≤VO(REG)
PRE-CHARGE AND SHORT-CIRCUIT CURRENT REGULATION
Pre-charge voltage threshold
ISC
Short-circuit current
CHARGE TERMINATION DETECTION
Voltage at pin SNS relative to BAT pin, 0°C ≤
TA ≤ 70°C
V(UVT) ≤ VI(BAT) ≤ V(LOWV)
0°C ≤ TA ≤ 70°C, 0 ≤ VI(BAT) ≤ V(UVT)
V(ITERM)
Charge termination current detect
threshold
Voltage at pin SNS relative to BAT pin,
0°C ≤ TA ≤ 70°C TADJ pin tied to VREF pin,
VI(SNS) = VO(REG)VI(BAT) > V(RCH)
Voltage at pin SNS relative to BAT pin,
0°C ≤ TA ≤ 70°C TADJ pin tied to VSS pin,
VI(SNS) = VO(REG)VI(BAT) > V(RCH)
V(EN-TERM) Enable termination voltage
(VI(SNS) – VI(BAT)₎ < V(ITERM) , VBAT increasing
above threshold
Falling-edge delay for termination
t(TRMDET2) _detection
t(TRMDET1)
Rising-edge delay for termination
detection
(VSNS – VBAT) increasing above threshold,
VI(BAT) > V(EN_–TERM),
100 ns fall time
2 mV overdrive
(VSNS – VBAT) increasing above threshold,
VI(BAT) > V(EN_–TERM),
100 ns fall time
2 mV overdrive
TEMPERATURE COMPARATOR
V(LTF)
V(HTF)
V(TCO)
Cold temperature threshold voltage
Hot temperature threshold voltage
Cutoff temperature threshold voltage
LTF hysteresis
VTS, VCC ≥ 3.5 V
VTS, VCC ≥ 3.5 V
VTS, VCC ≥ 3.5 V
Hysteresis for LTF threshold voltage
LOW BATTERY VOLTAGE (LOWV) THRESHOLD COMPARATOR
V(LOWV)
(1)
Ensured by design. Not production tested.
MIN
4.17
5.8
184
V(UVT)
10
5.4
16
7.5
VO(REG)
–210
72.6
33.7
28.7
0.1
3.00
TYP
4.20
6.0
200
20
20
10.0
VO(REG)
– 160
100
20
73.5
34.4
29.3
0.6
3.05
MAX
2
1
1
1
1
4.23
6.3
216
VCC
30
30.0
24
12.5
VO(REG)
– 110
74.1
35.1
29.9
1.1
3.15
UNIT
mA
µA
V
mV
V
mV
mA
mV
V
µs
ms
%VCC
V
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