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bq24074RGTT Datasheet(PDF) 5 Page - Texas Instruments

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Part # bq24074RGTT
Description  1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

bq24074RGTT Datasheet(HTML) 5 Page - Texas Instruments

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bq24072, bq24073
bq24074, bq24075, bq24079
www.ti.com................................................................................................................................................. SLUS810D – SEPTEMBER 2008 – REVISED JUNE 2009
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range (0°
≤ TJ ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
BATTERY CHARGER
IBAT
Source current for BAT pin short-circuit detection
VBAT = 1.5V
4
7.5
11
mA
VBAT(SC)
BAT pin short-circuit detection threshold
VBAT rising
1.6
1.8
2
V
('72, '73, '74, '75)
4.16
4.20
4.23
V
VBAT(REG)
Battery charge voltage
('79)
4.059
4.100
4.141
VLOWV
Pre-charge to fast-charge transition threshold
VIN > VUVLO and VIN > VBAT + VIN(DT)
2.9
3
3.1
V
tDGL1(LOWV)
Deglitch time on pre-charge to fast-charge transition
25
ms
tDGL2(LOWV)
Deglitch time on fast-charge to pre-charge transition
25
ms
VBAT(REG) > VBAT > VLOWV, VIN = 5 V CE = LO,
Battery fast charge current range
300
1500
mA
EN1 = LO, EN2 = HI
ICHG
CE = LO, EN1= LO, EN2 = HI,
Battery fast charge current
VBAT > VLOWV, VIN = 5 V, IINmax > ICHG, no load on OUT pin,
KISET/RISET
A
thermal loop and DPPM loop not active
KISET
Fast charge current factor
797
890
975
A
IPRECHG
Pre-charge current
KPRECHG/RISET
A
KPRECHG
Pre-charge current factor
70
88
106
A
CE = LO, (EN1, EN2)
≠ (LO, LO),
A
0.09×ICHG
0.1×ICHG
0.11×ICHG
VBAT > VRCH, t < tMAXCH, VIN = 5 V, DPPM loop and thermal
loop not active
Termination comparator detection threshold
ITERM
(internally set)
CE = LO, (EN1, EN2) = (LO, LO),
0.027×ICHG
0.033×ICHG
0.040×ICHG
VBAT > VRCH, t < tMAXCH, VIN = 5 V, DPPM loop and thermal
loop not active
IBIAS(ITERM)
Current for external termination-setting resistor
VIN > VUVLO and VIN > VBAT + VIN(DT)
72
75
78
µA
Termination current threshold (externally set)
A
ITERM
KITERM × RITERM / RISET
(bq24074)
USB500 or ISET mode(EN1, EN2)
≠ (LO, LO)
A
0.0225
0.0300
0.0375
CE = LO, VBAT > VRCH, t < tMAXCH, VIN = 5 V, DPPM loop and
thermal loop not active
K Factor for termination detection threshold
KITERM
(externally set) (bq24074)
USB100 mode (EN1, EN2) = (LO, LO),
0.008
0.0100
0.012
CE = LO, VBAT > VRCH, t < tMAXCH, VIN = 5 V, DPPM loop and
thermal loop not active
tDGL(TERM)
Deglitch time, termination detected
25
ms
VBAT(REG)
VBAT(REG)
VBAT(REG)
VRCH
Recharge detection threshold
VIN > VUVLO and VIN > VBAT + VIN(DT)
V
–140mV
–100mV
–60mV
tDGL(RCH)
Deglitch time, recharge threshold detected
62.5
ms
VBAT = 3.6 V. Time measured from
tDGL(NO-IN)
Delay time, input power loss to OUT LDO turn-off
20
ms
VIN: 5 V → 3 V 1 µs fall-time
IBAT(DET)
Sink current for battery detection
VBAT = 2.5V
5
7.5
10
mA
tDET
Battery detection timer
BAT high or low
250
ms
BATTERY CHARGING TIMERS
tPRECHG
Pre-charge safety timer value
TMR = floating
1440
1800
2160
s
tMAXCHG
Charge safety timer value
TMR = floating
14400
18000
21600
s
tPRECHG
Pre-charge safety timer value
18 k
Ω < RTMR < 72 kΩ
RTMR × KTMR
s
tMAXCHG
Charge safety timer value
18 k
Ω < RTMR < 72 kΩ
10×RTMR ×KTMR
s
KTMR
Timer factor
36
48
60
s/k
BATTERY-PACK NTC MONITOR
(1)
INTC
NTC bias current
VIN > UVLO and VIN > VBAT + VIN(DT)
72
75
78
µA
VHOT
High temperature trip point
Battery charging, VTS Falling
270
300
330
mV
VHYS(HOT)
Hysteresis on high trip point
Battery charging, VTS Rising from VHOT
30
mV
VCOLD
Low temperature trip point
Battery charging, VTS Rising
2000
2100
2200
mV
VHYS(COLD)
Hysteresis on low trip point
Battery charging, VTS Falling from VCOLD
300
mV
tDGL(TS)
Deglitch time, pack temperature fault detection
TS fault detected to charger disable
50
ms
VDIS(TS)
TS function disable threshold (bq24072, bq24073)
TS unconnected
VIN - 200mV
V
THERMAL REGULATION
TJ(REG)
Temperature regulation limit
125
°C
TJ(OFF)
Thermal shutdown temperature
TJ Rising
155
°C
TJ(OFF-HYS)
Thermal shutdown hysteresis
20
°C
(1)
These numbers set trip points of 0°C and 50°C while charging, with 3°C hysteresis on the trip points, with a Vishay Type 2 curve NTC
with an R25 of 10 k
Ω.
Copyright © 2008–2009, Texas Instruments Incorporated
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Product Folder Link(s): bq24072 bq24073 bq24074 bq24075, bq24079


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