BQ25050 Datasheet, PDF (4/28 Pages) Texas Instruments – 1A, Single-Input, Single Cell Li-Ion Battery Charger with 50-mA LDO, External Power Path

bq25050
SLUSA33 – MARCH 2010
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range 0°C ≤ T_J ≤ 125°C and VIN = 5V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
t_DGL(RCH)
Deglitch time, recharge threshold detected
25
EXTERNAL POWER PATH CONTROL
V_OUT(REG)
Output regulation voltage
V_SUPP1
Enter supplement mode threshold
V_BAT ≤ 2.9 V
2.9 V < V_BAT ≤ 3.6V
V_BAT > 3.6 V
V_BAT = 3.4 V, V_OUT Falling
3.4
3.5
3.44
3.59
V_BAT + V_drop(QBAT)
V_OUT ≤
V_BAT
-60mV
V_SUPP2
LDO
Exit supplement mode threshold
V_BAT = 3.4 V, V_OUT Rising
V_OUT ≥
V_BAT-20mV
V_LDO
LDO Output Voltage
I_LDO
Maximum LDO Output Current
V_DO
Dropout Voltage
CTRL INTERFACE
V_IN = 5.5V, I_LDO = 0mA to 50mA
V_IN = 4.5V, I_LDO = 50mA
4.
4.9
60
200
t_CTRL-DGL
CTRL Deglitch timer
t_CTRL-LATCH
CTRL Latch timer
t_CTRL-HIGH
High Duration on CTRL
t_CTRL-LOW
Low Time Duration on CTRL
R_PULLDOWN
CTRL Pulldown Resistor
LOGIC LEVELS ON CTRL, CHG, BGATE
5
2
50
50
260
V_IL
Logic LOW input voltage
V_IH
Logic HIGH input voltage
1.4
BATTERY-PACK NTC MONITOR (TS)
V_{TS_CLAMP}
I_TS-0C
I_TS
Maximum TS Voltage
Current source for 0°C TS sensing
Current source for 45°C and 60°C TS
sensing
3.75
4
19
20
V_COLD
TS Cold Threshold, when BGATE is
disabled
V_TS < V_COLD to begin charge
(Corresponds to 0°C, 2°C, 4°C^{(1) (2)} )
0.55
0.575
V_{CUTOFF_0}
TS Cold Cutoff Threshold
Temp falling (Corresponds to –1°C, 1°C,
3°C^{(1) (2)})
0.575
0.600
V_{HOT_45}
TS Hot Threshold (0°C to 45°C), when
BGATE is disabled
V_TS > V_{HOT_45} to begin charge, 0°C to
45°C thresholds selected. (Corresponds to
40°C, 42°C, 44°C^{(1) (2)})
0.44
0.45
V_{CUTOFF_45}
TS Hot Cutoff Threshold (0°C to 45°C)
Temp rising (Corresponds to 45°C, 47°C,
49°C^{(1) (2)})
0.365
0.375
V_{HOT_60}
TS Hot Threshold (0°C to 60°C), when
BGATE is disabled
V_TS > V_{HOT_60} to begin charge, 0°C to
60°C thresholds selected, Temp rising
(Corresponds to 54.5°C, 57°C, 60°C^{(1) (2)})
0.240
0.250
V_{CUTOFF_60}
TS Hot Cutoff Threshold (0°C to 60°C)
V_-20
V₈₀
t_dgl(TS)
CHG OUTPUT
–20°C TS Voltage
+80°C TS Voltage
Deglitch for TS Fault
Temp rising. (Corresponds to 58.5°C,
61.5°C, 64°C^{(1) (2)})
See ⁽¹⁾
See ⁽¹⁾
Fault detected on TS to stop charge
0.204
0.213
0.968
0.110
25
V_OL
Output LOW voltage
I_SINK = 5 mA
I_IH
Leakage current
V_/CHG = 5 V
t_FLSH(TS)
TS fault flash period
50% Duty Cycle, TS out of valid range
100
THERMAL REGULATION
T_J(REG)
Temperature Regulation Limit
T_J rising
125
T_J(OFF)
Thermal shutdown temperature
T_J rising
155
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MAX UNITS
ms
3.6
V
3.75
V
V
V
V
5.1
V
mA
300 mV
ms
ms
1000 ms
1000 µs
kΩ
0.4
V
V
1.5
V
4.25 µA
21 µA
0.600
V
0.625
V
0.46
V
0.385
V
0.258
V
0.223
V
V
V
ms
0.45
V
1 µA
ms
°C
°C
(1) Information is based on using the NCP15WB473F NTC thermistor.
(2) Temperature references give design guidance only, actual absolute temperatures are not guaranteed.
4
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