BQ29441 Datasheet, PDF (4/17 Pages) Texas Instruments – Voltage Protection for 2-Series, 3-Series, or 4-Series Cell Li-Ion Batteries

bq29440, bq2944L0
bq29441, bq29442, bq29443, bq29449, bq2944L9
SLUSA15C – JUNE 2010 – REVISED NOVEMBER 2010
RECOMMENDED OPERATING CONDITIONS (continued)
Voltage monitor filter capacitance
C_IN (See Figure 7.)
Supply voltage filter resistance
R_VD (See Figure 7.)
Supply voltage filter capacitance
C_VD (See Figure 7.)
Operating ambient temperature range, T_A
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MIN NOM MAX UNIT
0.01
0.1
µF
0.1
1
kΩ
0.1
µF
–40
110
°C
ELECTRICAL CHARACTERISTICS
Typical values stated where T_A = 25°C and VDD = 17 V, MIN/MAX values stated where T_A = –40°C to 110°C and VDD = 4 V
to 25 V (unless otherwise noted).
PARAMETER
TEST CONDITION
MIN NOM MAX UNIT
bq29440
4.35
V_PROTECT
Overvoltage ^bq29441
detection bq29442
voltage
bq29443
4.40
4.45
V
4.50
bq29449
4.30
V_HYS
Overvoltage detection
hysteresis
For non-latch devices only
200
300
400
mV
V_OA
Overvoltage detection
accuracy
T_A = 25°C
–10
10
mV
V_{OA_DRIFT}
X_DELAY
Overvoltage threshold
temperature drift
Overvoltage delay time
scale factor
T_A = 0°C to 60°C
T_A = –40°C to 110°C
T_A = 0°C to 60°C
Note: Does not include external capacitor variation
T_A = –40°C to 110°C
Note: Does not include external capacitor variation
–0.4
0.4
mV/°C
–0.6
0.6
6.0
9.0
12
s/µF
5.5
9.0
13.5
Overvoltage delay time
X_{DELAY_CTM} scale factor in
See CUSTOMER TEST MODE.
Customer Test Mode
0.08
s/µF
I_CD(CHG)
Overvoltage detection
charging current
See Figure 1.
140
nA
I_CD(DSG)
Overvoltage detection
discharging current
See Figure 2.
60
µA
Overvoltage detection
V_CD
external capacitor
comparator threshold
1.2
V
(VC1–VC2), (VC2–VC3), (VC3–VC4) and (VC4–GND) =
I_CC
Supply current
3.5 V
See Figure 3.
2
3.5
µA
V_OUT
I_OUT(SHORT)
t_r(OUT) ⁽¹⁾
Z_O(OUT) ⁽¹⁾
(VC1–VC2), (VC2–VC3), (VC3–VC4) or
(VC4–GND) = V_PROTECT, VDD = 20 V,
I_OH = 0 to –10 µA
OUT pin drive voltage
(VC1–VC2), (VC2–VC3), (VC3–VC4) or
(VC4–GND) = V_PROTECT, VDD = 4.35 V,
I_OL = –10 µA, T_A = 0°C to 60°C
(VC1–VC2), (VC2–VC3), (VC3–VC4) or
(VC4–GND) = V_PROTECT, VDD > 6 V,
I_OH = –10 µA, T_A = 0°C to 60°C
(VC1–VC2), (VC2–VC3), (VC3–VC4) or
(VC4–GND) = 4 V, I_OL = 0 µA
OUT short circuit
current
OUT = 0 V, (VC1–VC2), (VC2–VC3), (VC3–VC4) or
(VC4–GND) > V_PROTECT, VDD = 18 V
OUT output rise time C_L = 1 nF, VDD = 4 V to 25 V, V_OH(OUT) = 0 V to 5 V
OUT output impedance
6.5
8.0
9.5
V
1.50
3.0
V
2.0
3.0
V
0.1
V
4
mA
5
µs
2
kΩ
(1) Specified by design. Not 100% tested in production.
4
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