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| BQ29400 Datasheet, PDF (3/10 Pages) Texas Instruments – VOLTAGE PROTECTION FOR 2-, 3-, OR 4-CELL Lion BATTERIES | |||
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www.ti.com
bq29400, bq29400A
bq29401, bq29405
SLUS568B â JULY 2003 â REVISED NOVEMBER 2004
ELECTRICAL CHARACTERISTICS
over recommended operating free-air temperature range, TA = 25°C (unless otherwise noted)(1)
PARAMETER
TEST CONDITION
MIN NOM MAX UNIT
V(OA)
Over voltage detection accuracy
bq29400
TA = â20°C to 85°C
25 35
mV
25 50
4.35
V(PROTECT)
Over voltage detection
voltage (1)
bq2940A
bq29401
4.40
V
4.45
bq29405
4.65
Vhys
Over voltage detection hysteresis(1)
II
Input current
V2, V3 , VC4 inputVC1 = VC2 = VC3 = VC4 = 3.5 V
(see Figure 1)
300
mV
±0.3 µA
tD1
I(CD_dis)
ICC
Over voltage detection delay time
CD GND clamp current
Supply current
CD = 0.22 µF
CD = 1 V
VC1 = VC2 = VC3 = VC4 = 3.5 V (see Figure 1)
VC1 = VC2 = VC3 = VC4 = 2.3 V (see Figure 1)
1.0 1.5 2.0 S
5
12
µA
2.0 3.0
µA
1.5 2.5
V(OUT)
IOH
IOL
OUT pin drive voltage
High-level output current
Low-level output current
VC1 = VC2 = VC3 = VC4 = 4.7 V, IOH = 0 mA
7
V
OUT = 3V, VC1 = VC2 = VC3 = VC4 = 4.7 V
â1
mA
OUT = 0.1 V VC1 = VC3 = VC4 = 3.5 V
5
µA
(1) Levels of the over-voltage detection and the hysteresis can be adjusted. For assistance contact Texas Instruments sales representative.
ICC
1 VC1
IIN
2 VC2
IIN 3 VC3
4 GND
OUT 8
VDD 7
CD 6
VC4 5 IIN
Figure 1. ICC, IIN Measurement (TSSOP Package)
TERMINAL No.
MSOP
(DTC)
TSSOP
(PW)
NAME
8
1
VC1
7
2
VC2
6
3
VC3
5
4
GND
4
5
VC4
3
6
CD
2
7
VDD
1
8
OUT
Terminal Functions
DESCRIPTION
Sense voltage input for most positive cell
Sense voltage input for second most positive cell
Sense voltage input for third most positive cell
Ground pin
Sense voltage input for least positive cell
An external capacitor is connected to determine the programmable delay time
Power supply
Output
3
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