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| BQ24020_07 Datasheet, PDF (4/22 Pages) Texas Instruments – SINGLE-CHIP, LI-ION AND LI-POL CHARGER IC WITH AUTONOMOUS USB-PORT AND AC-ADAPTER SUPPLY MANAGEMENT (bqTINY-II) | |||
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bq24020, bq24022, bq24023
bq24024, bq24025, bq24026
bq24027
SLUS549D â DECEMBER 2002 â REVISED MARCH 2006
ELECTRICAL CHARACTERISTICS (continued)
over 0°C ⤠TJ ⤠125°C and recommended supply voltage, unless otherwise noted
PARAMETER
TEST CONDITIONS
PRECHARGE AND SHORT-CIRCUIT CURRENT REGULATION
V(LOWV)
Precharge to fast-charge
transition threshold
Voltage on OUT pin
IO(PRECHG)
Deglitch time for fast-charge to
precharge transition
Precharge range(2)
VCC(MIN) ⥠4.5 V, tFALL = 100 ns, 10 mV
overdrive, VI(OUT) decreasing below threshold
0 V < VI(OUT) < V(LOWV), t < t(PRECHG)
V(PRECHG) Precharge set voltage
Voltage on ISET1 pin
0 V < VI(OUT) > V(LOWV),
VO(REG) = 4.2 V
t < t(PRECHG)
CHARGE TAPER AND TERMINATION DETECTION
I(TAPER)
Charge taper detection range(3)
VI(OUT) > V(RCH), t < t(TAPER)
USB-100 charge taper
detection level
bq24026
VI(OUT) > V(RCH), ISET2 = Low
USB-500 charge taper
detection level
bq24026
VI(OUT) > V(RCH), ISET2 = High
V(TAPER)
V(TERM)
t(TPRDET)
Charge taper detection set voltage
Charge termination detection
set voltage(4)
Deglitch time for TAPER detection
Voltage on ISET1 pin, VO(REG) = 4.2 V,
VI(OUT) > V(RCH), t < t(TAPER)
Voltage on ISET1 pin, VO(REG) = 4.2 V,
VI(OUT) > V(RCH)
VCC(MIN) ⥠4.5 V, tFALL = 100 ns charging
current increasing or decreasing above and
below, 10 mV overdrive
t(TRMDET)
Deglitch time for
termination detection
VCC(MIN) ⥠4.5 V, tFALL = 100 ns charging
current decreasing below, 10 mV overdrive
TEMPERATURE SENSE COMPARATOR
V(HTF)
V(LTF)
I(TS)
t(DEGL)
High-voltage threshold
Low-voltage threshold
Current source
Deglitch time for temperature fault
PTC thermistor
PTC thermistor
Ç Ç K(SET) V(PRECHG)
IO(PRECHG) +
(2)
RSET
Ç Ç K(SET) V(TAPER)
IO(TAPER) +
(3)
RSET
Ç Ç K(SET) V(TERM)
IO(TERM) +
(4)
RSET
www.ti.com
MIN TYP
2.8
3.0
250
375
5
240
255
MAX UNIT
3.2 V
500 ms
100 mA
270 mV
5
6.5
9
32
44
235
250
11
18
250
375
250
375
100
11
mA
55
265
mV
25
500
ms
500
2.475
0.485
96
250
2.500
0.500
102
375
2.525
V
0.515
108 µA
500 ms
4
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