BQ25505 Datasheet, PDF (5/34 Pages) Texas Instruments – Ultra Low Power Boost Charger with Battery Management and Autonomous Power

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bq25505
SLUSBJ3B – AUGUST 2013 – REVISED JANUARY 2014
ELECTRICAL CHARACTERISTICS
Over recommended temperature range, typical values are at T_A = 25°C. Unless otherwise noted, specifications apply for
conditions of VSTOR = 4.2 V. External components, C_IN = 4.7 µF, L1 = 22 µH, CSTOR= 4.7 µF
PARAMETER
TEST CONDITIONS
MIN TYP
MAX UNIT
BOOST CHARGER
VIN(DC)
DC input voltage into VIN_DC
Cold-start completed
100
5100 mV
I-CHG(CBC_LIM)
Cycle-by-cycle current limit of charger
0.5V < V_IN < 4.0 V; VSTOR = 4.2
V
230
285 mA
PIN
Input power range for normal charging
VBAT_OV > VSTOR >
0.005
510 mW
VSTOR_CHGEN
VIN(CS)
VSTOR_CHGEN
Minimum input voltage for cold start circuit to
start charging VSTOR
Voltage on VSTOR when cold start operation
ends and normal charger operation commences
VBAT_SEC < VBAT_UV; VSTOR
= 0 V; 0°C < T_A < 85°C
330
1.6 1.73
400 mV
1.9 V
PIN(CS)
Minimum cold-start input power for VSTOR to
reach VSTOR_(CHGEN) and allow normal charging
to commence
VSTOR < VSTOR_(CHGEN)
5
µW
t_{BAT_HOT_PLUG}
Time for which switch between VSTOR and
VBAT_SEC closes when battery is hot plugged
into VBAT_SEC
Battery resistance = 300 Ω,
Battery voltage = 3.3V
50
ms
QUIESCENT and LEAKAGE CURRENTS
I_Q
EN = GND - Full operating mode
VIN_DC = 0V; VSTOR = 2.1V; T_J
325
400 nA
= 25°C
EN = VBAT_SEC - Ship mode
VIN_DC = 0V; VSTOR = 2.1V;
–40°C < T_J < 85°C
VBAT_SEC = VBAT_PRI = 2.1 V;
T_J = 25°C; VSTOR = VIN_DC = 0
V
700
1
5
VBAT_SEC = VBAT_PRI = 2.1 V;
20
–40°C < T_J < 85°C; VSTOR =
VIN_DC = 0 V
I-BATPRI(LEAK)
EN = VBAT_SEC - Ship mode
VBAT_PRI = VBAT_SEC = 2.1 V;
T_J = 25°C; VIN_DC = 0 V; VSTOR
floating
1
5 nA
VBAT_PRI = VBAT_SEC = 2.1 V;
–40°C < T_J < 85°C; VIN_DC = 0 V;
VSTOR floating
20 nA
MOSFET RESISTANCES
RDS(ON)-BAT
ON resistance of switch between VBAT_SEC and VBAT_SEC = 4.2 V
VSTOR
0.95
1.50 Ω
RDS(ON)_CHG
Charger low side switch ON resistance
VBAT_SEC = 4.2 V
0.70
0.90 Ω
Charger high side switch ON resistance
2.30
3.00 Ω
Charger low side switch ON resistance
VBAT_SEC = 2.1 V
0.80
1.00 Ω
Charger high side switch ON resistance
3.70
4.80 Ω
f_SW
T_{TEMP_SD}
Maximum charger switching frequency
Junction temperature when charging is
discontinued
VBAT_OV > VSTOR > 1.8V
1.0
MHz
125
C
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