BQ29311_15 Datasheet, PDF (4/24 Pages) Texas Instruments – FOUR-CELL LITHIUM-ION

Not Recommended for New Designs
bq29311
SLUS487D − DECEMBER 2001 − REVISED NOVEMBER 2003
www.ti.com
ELECTRICAL CHARACTERISTICS CONTINUED
TA = 25°C, CREG = 1 µF, VCC = 14 V (unless otherwise noted)
OVERCURRENT (OC) AND SHORT CIRCUIT (SC) DETECTION
V(OCD)
∆V(OCD)
Vhys(OCD)
V(SC)
∆V(SC)
Vhys(SC)
V(OCD_acr)
V(SC_acr)
PARAMETER
OC detection threshold range,
typical(1)
OC detection threshold program step
OC detection threshold hysteresis
SC detection threshold range,
typical(2)
SC detection threshold program step
SC detection threshold hysteresis
OC detection threshold accuracy(1)
SC detection threshold accuracy(2)
TEST CONDITIONS
Charge (overcurrent)
Discharge (overload)
Charge (overcurrent)
Discharge (overload)
Charge and discharge (overcurrent and overload)
Charge
Discharge
Charge
Discharge
Charge and discharge
Charge and discharge
Charge and discharge
V(OCD) = 50 mV (min)
V(OCD) = 100 mV
V(OCD) = 205 mV (max)
V(SC) = 100 mV (min)
V(SC) = 200 mV
V(SC) = 475 mV (max)
(1) See OCVD and OCVC registers for setting detection threshold.
(2) See SCV register for setting detection threshold.
MIN
50
− 50
7
100
− 100
40
37.5
85
174
75
170
403
TYP
5
−5
10
25
− 25
50
50
100
205
100
200
475
MAX
205
− 205
13
475
− 475
60
62.5
115
236
125
230
547
UNIT
mV
mV
mV
mV
mV
mV
mV
mV
FET DRIVE CIRCUIT
PARAMETER
V(FETOL)
Output voltage
V(FETCLAMP) Output clamp voltage
tr
Rise time
tf
Fall time
TEST CONDITIONS
VBAT = 16 V
DSG
VPACK = 16 V
CHG
VPACK = 16 V
PCHG
VPACK = 4.5 V
PCHG
DSG
CL = 4700 pF, 10% to 90%
CHG
PCHG
DSG
CL = 4700 pF, 90% to 10%
CHG
PCHG
MIN TYP MAX UNIT
1
5
7
1
5
7V
8.5 10.5 11.5
3.3 3.5 3.7 V
10 100
10 100 µs
170 500
15 100
15 100 µs
170 500
THERMISTOR DRIVE AND LED DRIVE
PARAMETER
R(t)
TOUT pass-element series resistance
V(LEDOUT) LEDOUT output voltage
TEST CONDITIONS
IO = −1 mA at TOUT pin,
R(t) = (VREG – VTOUT )/1 mA,
TA = − 25°C to 85°C
IO = − 25 mA at LEDOUT pin,
TA = − 25°C to 85°C
LOGIC
PARAMETER
R(PUP) Internal pullup resistance
VO(L) Logic low-level output voltage
TEST CONDITIONS
XALERT, CLKIN
SDATA, SCLK
XALERT, IOUT = 200 µA
SDATA, IOUT = 50 µA
TA = − 25°C to 85°C
MIN TYP MAX UNIT
50 100 Ω
2.9 3.15 3.46 V
MIN TYP MAX UNIT
60 100 140
kΩ
6
10
14
0.2
V
0.4
4