BQ25070 Datasheet, PDF (4/21 Pages) Texas Instruments – 1A, Single-Input, Single-Cell LiFePO4 Linear Battery Charger with 50mA LDO

bq25070
SLUSA66 – JULY 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range 0°C ≤ T_J ≤ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX
I_PRECHARGE
Precharge current to BAT during precharge
mode
V_BAT = 0 V to 0.7 V
41.5
45 48.5
RECHARGE OR REFRESH
V_RCH
t_DGL(RCH)
LDO
Recharge detection threshold
Deglitch time, recharge threshold detected
V_BAT falling
V_BAT falling to New Charge Cycle
3.1 3.3 3.5
25
V_LDO
LDO Output Voltage
I_LDO
Maximum LDO Output Current
V_DO
Dropout Voltage
CTRL INTERFACE
V_IN = 5 V to 10.5 V,
I_LDO = 0 mA to 50 mA
V_IN = 4.5V, ILDO = 50mA
4.7 4.9 5.1
60
200 350
t_{CTRL_DGL}
CTRL Deglitch timer
t_{CTRL_LATCH} CTRL Latch timer
t_{HI_MIN}
High Duration on CTRL
t_{LO_MIN}
Low Time Duration on CTRL
R_PULLDOWN CTRL Pulldown Resistor
LOGIC LEVELS ON CTRL
5
2
50
1000
50
1000
260
V_IL
Logic LOW input voltage
V_IH
Logic HIGH input voltage
BATTERY-PACK NTC MONITOR (TS)
0.4
1.4
V_COLD
TS Cold Threshold
V_CUTOFF
TS Cold Cutoff Threshold
V_HOT
TS Hot Threshold
V_{HOT_HYS}
TS Hot Cutoff Threshold
t_dgl(TS)
Deglitch for TS Fault
CHG OUTPUT
V_TS Rising
V_TS Falling
V_TS Falling
V_TS Rising
Fault detected on TS to stop charge
24.5
25 25.5
1
12 12.5
13
1
25
V_OL
Output LOW voltage
I_IH
Leakage current
t_FLSH(TS)
TS fault flash period
THERMAL REGULATION
I_SINK = 1 mA
CHG = 5 V
50% Duty Cycle, TS out of valid range
0.45
1
100
T_J(REG)
Temperature Regulation Limit
T_J rising
125
T_J(OFF)
Thermal shutdown temperature
T_J rising
155
T_J(OFF-HYS) Thermal shutdown hysteresis
T_J falling
20
UNITS
mA
V
ms
V
mA
mV
ms
ms
μs
μs
kΩ
V
V
%V_LDO
%V_LDO
%V_LDO
%V_LDO
ms
V
μA
ms
C
C
C
4
Copyright © 2011, Texas Instruments Incorporated