BQ27741-G1_14 Datasheet, PDF (6/39 Pages) Texas Instruments – Single Cell Li-Ion Battery Fuel Gauge with Integrated Protection

bq27741-G1
SLUSBF2 – JULY 2013
Power-On Reset
T_A = 25°C, C_REG25 = 1.0 µF, and V_VPWR = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_IT+
V_HYS
Increasing battery voltage input at V_REG25
Power-on reset hysteresis
2.5-V LDO Regulator⁽¹⁾
T_A = 25°C, C_REG25 = 1.0 µF, and V_VPWR = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_REG25 Regulator output voltage
I_SHORT ⁽²⁾ Short-circuit current limit
2.8 V ≤ V_VPWR ≤ 4.5 V,
I_OUT(1) ≤ 16 mA
2.45 V ≤ V_VPWR < 2.8 V (low
battery),
I_OUT ⁽¹⁾ ≤ 3 mA
V_REG25 = 0 V
T_A = –40°C to
85°C
T_A = –40°C to
85°C
(1) LDO output current, I_OUT, is the sum of internal and external load currents.
(2) Assured by characterization. Not production tested.
Charger Attachment and Removal Detection
T_A = 25°C, C_REG25 = 1.0 µF, and V_VPWR = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
V_CHGATT Voltage threshold for charger attachment
detection
V_CHGREM Voltage threshold for charger removal
detection
Voltage Doubler
T_A = 25°C, C_REG25 = 1.0 µF, and V_VPWR = 3.6 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
V_FETON
CHG and DSG FETs on
V_FETOFF
V_FETRIPPLE ⁽¹⁾
CHG and DSG FETs off
CHG and DSG FETs on
t_FETON
FET gate rise time
(10% to 90%)
I_L = 1 µA
T_A = –40°C to 85°C
T_A = –40°C to 85°C
I_L = 1 µA
T_A = –40°C to 85°C
C_L = 4 nF
T_A = –40°C to 85°C
No series resistance
2 × V_VPWR – 0.4
67
t_FETOFF
FET gate fall time
C_L = 4 nF
10
(90% to 10%)
T_A = –40°C to 85°C
No series resistance
(1) Assured by characterization. Not production tested.
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MIN
TYP
MAX UNIT
2.09
2.20
2.31 V
45
115
185 mV
MIN
TYP
MAX UNIT
2.3
2.5
2.6 V
2.3
V
250 mA
MIN
TYP
MAX UNIT
2.7
3.0 V
0.5
1.0
V
TYP
2 × V_VPWR – 0.2
MAX
2 × V_VPWR
UNIT
V
0.2 V
0.1 V_PP
140
218 μs
30
60 μs
6
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