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| BQ25070 Datasheet, PDF (3/21 Pages) Texas Instruments – 1A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger with 50mA LDO | |||
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bq25070
www.ti.com
SLUSA66 â JULY 2011
ELECTRICAL CHARACTERISTICS
Over junction temperature range 0°C ⤠TJ ⤠125°C and recommended supply voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
INPUT
VUVLO
VHYS-UVLO
VBATUVLO
VHYS-BUVLO
VIN-SLP
VHYS-INSLP
tDGL(NO-IN)
Under-voltage lock-out
Hysteresis on UVLO
Battery UVLO
Hysteresis on BAT UVLO
Valid input source threshold VIN-SLP above
VBAT
Hysteresis on VIN-SLP
Delay time, input power loss to charger
turn-off
VIN: 0 V â 4 V
VIN: 4 V â 0 V
VBAT rising
VBAT falling
Input power good if VIN > VBAT +
VIN-SLP
VBAT = 3.6 V, VIN: 3.5 V â 4 V
VBAT = 3.6 V, VIN: 4 V â 3.5 V
Time measured from VIN: 5 V â 2.5 V
1μs fall-time
3.15 3.30 3.55
250
1.95 2.05 2.15
125
30
75 150
18
32
54
32
VOVP
VHYS-OVP
tBLK(OVP)
Input over-voltage protection threshold
Hysteresis on OVP
Input over-voltage blanking time
tREC(OVP)
Input over-voltage recovery time
QUIESCENT CURRENT
VIN: 5 V â 11 V
VIN: 11 V â 5 V
Time measured from VIN: 11 V â 5 V
1μs fall-time to LDO = HI, VBAT = 3.5 V
10.2
10.5
100
100
100
10.8
IBAT(PDWN)
Battery current into BAT, No input connected
IIN(STDBY)
Standby current into IN pin
ICC
Active supply current, IN pin
BATTERY CHARGER FAST-CHARGE
VIN = 0 V, VCHG = High, TS Enabled
VIN = 0 V, VCHG = Low, TS Disabled,
TJ = 85°C
CTRL = HI, VIN = 5.5V
CTRL = HI, VIN ⤠VOVP
CTRL = HI, VIN > VOVP
VIN = 6 V, No load on OUT pin,
VBAT> VBAT(REG), IC enabled
120 150
6
0.25
0.5
2
3
VBAT(REG)
VBAT(OVCH)
Battery float charge voltage
Battery overcharge voltage threshold
TA = 0°C to 125°C
TA = 25°C
4 pulses on CTRL
3.465
3.465
3.62
87
3.5 3.535
3.5 3.529
3.7 3.78
93 100
5 pulses on CTRL
174 187 200
6 pulses on CTRL
261 280 300
IIN(LIM)
Input Current Limit (selected by CTRL
interface)
7 pulses on CTRL
8 pulses on CTRL
348 374 400
435 467 500
9 pulses on CTRL
608 654 700
10 pulses on CTRL
739 794 850
11 pulses on CTRL
869 935 1000
VDO(IN-OUT)
KIMON
VIN â VOUT
Input current monitor ratio
VIN = 3.5 V, IOUT = 0.75 A
KIMON = IIMON / ICHG, RIMON = 1kΩ,
Current programmed using CTRL
500 1400
1
VIMON(MAX)
Maximum IMON voltage
IMON Accuracy
PRE-CHARGE AND CHARGE DONE
IMON open
IIN < 100 mA
IIN = 100 mA to 1 A
â25%
â10%
1.2 1.25
25%
10%
VLOWV
tDGL1(LOWV)
Pre-charge to fast-charge transition threshold
Deglitch time on pre-charge to fast-charge
transition
2.4 2.5 2.6
25
tDGL2(LOWV)
Deglitch time on fast-charge to pre-charge
transition
25
UNITS
V
mV
V
mV
mV
mV
ms
V
mV
μs
μs
μA
μA
mA
mA
V
V
mA
mV
mA / A
V
V
ms
ms
Copyright © 2011, Texas Instruments Incorporated
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