BQ24072 Datasheet, PDF (5/38 Pages) Texas Instruments – 1.2A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

bq24072, bq24073
bq24074, bq24075
www.ti.com...................................................................................................................................... SLUS810A – SEPTEMBER 2008 – REVISED DECEMBER 2008
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range (0° ≤ T_J ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNIT
Battery fast charge current range
V_BAT(REG) > V_BAT > V_LOWV, V_IN = 5 V CE = LO,
EN1 = LO, EN2 = HI
300
1500 mA
I_CHG
Battery fast charge current
CE = LO, EN1= LO, EN2 = HI,
V_BAT > V_LOWV, V_IN = 5 V, I_INmax > I_CHG, no load
on OUT pin, thermal loop and DPPM loop not
K_ISET/R_ISET
A
active
K_ISET
I_PRECHG
K_PRECHG
I_TERM
Fast charge current factor
Pre-charge current
Pre-charge current factor
Termination comparator detection
threshold (internally set)
CE = LO, (EN1, EN2) ≠ (LO, LO),
V_BAT > V_RCH, t < t_MAXCH, V_IN = 5 V, DPPM loop
and thermal loop not active
CE = LO, (EN1, EN2) = (LO, LO),
V_BAT > V_RCH, t < t_MAXCH, V_IN = 5 V, DPPM loop
and thermal loop not active
797
890
975 AΩ
K_PRECHG/R_ISET
70
88
A
106 AΩ
0.09×I_CHG
A
0.1×I_CHG 0.11×I_CHG
0.027×I_CHG 0.033×I_CHG 0.040×I_CHG
I_BIAS(ITERM)
Current for external
termination-setting resistor
V_IN > V_UVLO and V_IN > V_BAT + V_IN(DT)
72
75
78 µA
I_TERM
Termination current threshold
(externally set) (bq24074)
K_ITERM × R_ITERM / R_ISET
A
K_ITERM
K Factor for termination detection
threshold (externally set) (bq24074)
USB500 or ISET mode(EN1, EN2) ≠ (LO, LO)
CE = LO, V_BAT > V_RCH, t < t_MAXCH, V_IN = 5 V,
DPPM loop and thermal loop not active
USB100 mode (EN1, EN2) = (LO, LO),
CE = LO, V_BAT > V_RCH, t < t_MAXCH, V_IN = 5 V,
DPPM loop and thermal loop not active
0.0225
0.0300
A
0.0375
0.008
0.0100
0.012
t_DGL(TERM)
V_RCH
Deglitch time, termination detected
Recharge detection threshold
V_IN > V_UVLO and V_IN > V_BAT + V_IN(DT)
V_BAT(REG)
–140mV
25
V_BAT(REG)
–100mV
ms
V_BAT(REG)
–60mV
V
t_DGL(RCH)
Deglitch time, recharge threshold
detected
62.5
ms
t_DGL(NO-IN)
Delay time, input power loss to OUT
LDO turn-off
I_BAT(DET)
Sink current for battery detection
t_DET
Battery detection timer
BATTERY CHARGING TIMERS
V_BAT = 3.6 V. Time measured from
V_IN: 5 V → 3 V 1 µs fall-time
V_BAT = 2.5V
BAT high or low
20
5
7.5
250
ms
10 mA
ms
t_PRECHG
Pre-charge safety timer value
t_MAXCHG
Charge safety timer value
t_PRECHG
Pre-charge safety timer value
t_MAXCHG
Charge safety timer value
K_TMR
Timer factor
BATTERY-PACK NTC MONITOR⁽¹⁾
TMR = floating
TMR = floating
18 kΩ < R_TMR < 72 kΩ
18 kΩ < R_TMR < 72 kΩ
1440
1800
14400
18000
R_TMR × K_TMR
10×R_TMR ×K_TMR
36
48
2160
21600
60
s
s
s
s
s/kΩ
I_NTC
V_HOT
V_HYS(HOT)
V_COLD
V_HYS(COLD)
t_DGL(TS)
NTC bias current
High temperature trip point
Hysteresis on high trip point
Low temperature trip point
Hysteresis on low trip point
Deglitch time, pack temperature fault
detection
V_IN > V_UVLO and V_IN > V_BAT + V_IN(DT)
Battery charging, V_TS Falling
Battery charging, V_TS Rising from V_HOT
Battery charging, V_TS Rising
Battery charging, V_TS Falling from V_COLD
TS fault detected to charger disable
72
270
2000
75
300
30
2100
300
50
78 µA
330 mV
mV
2200 mV
mV
ms
V_DIS(TS)
TS function disable threshold
(bq24072, bq24073)
TS unconnected
V_IN - 200mV
V
THERMAL REGULATION
T_J(REG)
T_J(OFF)
T_J(OFF-HYS)
Temperature regulation limit
Thermal shutdown temperature
Thermal shutdown hysteresis
T_J Rising
125
°C
155
°C
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 kΩ.
Copyright © 2008, Texas Instruments Incorporated
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