bq25505
SLUSBJ3B –AUGUST 2013–REVISED JANUARY 2014
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ELECTRICAL CHARACTERISTICS (continued)
Over recommended temperature range, typical values are at TA = 25°C. Unless otherwise noted, specifications apply for
conditions of VSTOR = 4.2 V. External components, CIN = 4.7 µF, L1 = 22 µH, CSTOR= 4.7 µF
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
BATTERY MANAGEMENT
VBAT_OV
Programmable voltage range for overvoltage
threshold
VBAT_SEC increasing
2.2
5.5
45
V
VBAT_OV_HYST
VDELTA
Battery over-voltage hysteresis (internal)
VBAT_SEC decreasing; VBAT_OV
= 5.25V
24
mV
mV
VBAT_OV - VIN(DC)
Main boost charger on; MPPT not
sampling VOC
400
VBAT_UV
Under-voltage threshold
VBAT_SEC decreasing
VBAT_SEC increasing
VBAT_SEC increasing
1.91
1.95
15
2
V
mV
V
VBAT_UV_HYST
VBAT_OK_HYST
Battery under-voltage hysteresis (internal)
32
Programmable voltage range of digital signal
indicating VSTOR (=VBAT_SEC) is OK
VBAT_UV
VBAT_UV
VBAT_
OV
VBAT_OK_PROG
Programmable voltage range of digital signal
indicating VSTOR (=VBAT_SEC) is OK
VBAT_SEC decreasing
VBAT_
OK_HYST –
50
mV
VBAT_ACCURACY
VBAT_OK(H)
Overall Accuracy for threshold values VBAT_OV, Selected resistors are 0.1%
-2
2
%
VBAT_OK
tolerance
VBAT_OK (High) threshold voltage
Load = 10 µA
VSTOR –
200
mV
mV
VBAT_OK(L)
VBAT_OK (Low) threshold voltage
Load = 10 µA
100
0.3
ENABLE THRESHOLDS
EN(H)
Voltage for EN high setting. Relative to
VBAT_SEC.
VBAT_SEC = 4.2V
VBAT_SEC = 4.2V
VBAT_SEC
– 0.2
V
V
EN(L)
Voltage for EN low setting
BIAS and MPPT CONTROL STAGE
VOC_SAMPLE
VOC_STLG
Time period between two MPPT samples
16
s
Settling time for MPPT sample measurement of
VIN_DC open circuit voltage
Device not switching
256
ms
VIN_REG
MPPT_80
MPPT_50
VBIAS
Regulation of VIN_DC during charging
0.5 V < VIN < 4 V; IIN(DC) = 10
mA
10%
Voltage on VOC_SAMP to set MPPT threshold to
0.80 of open circuit voltage of VIN_DC
VSTOR –
0.015
V
mV
V
Voltage on VOC_SAMP to set MPPT threshold to
0.50 of open circuit voltage of VIN_DC
15
Internal reference for the programmable voltage
thresholds
VSTOR ≥ VSTOR_CHGEN
1.205
1.21
5
1.217
MULTIPLEXOR
tDEAD
Dead time between VB_SEC_ON and
VB_PRI_ON
8(1)
us
(1) Specified by design.
6
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