BQ24072_10 Datasheet, PDF (5/42 Pages) Texas Instruments – 1.5A USB-FRIENDLY Li-Ion BATTERY CHARGER AND POWER-PATH MANAGEMENT IC

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bq24072, bq24073
bq24074, bq24075, bq24079
SLUS810E – SEPTEMBER 2008 – REVISED JULY 2010
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 CHARGER
I_BAT
V_BAT(SC)
V_BAT(REG)
Source current for BAT pin short-circuit detection
BAT pin short-circuit detection threshold
Battery charge voltage
V_BAT = 1.5V
V_BAT rising
('72, '73, '74, '75)
('79)
4
1.6
4.16
4.059
7.5
1.8
4.20
4.100
11 mA
2
V
4.23
V
4.141
V_LOWV
t_DGL1(LOWV)
t_DGL2(LOWV)
I_CHG
Pre-charge to fast-charge transition threshold
Deglitch time on pre-charge to fast-charge transition
Deglitch time on fast-charge to pre-charge transition
Battery fast charge current range
Battery fast charge current
V_IN > V_UVLO and V_IN > V_BAT + V_IN(DT)
V_BAT(REG) > V_BAT > V_LOWV, V_IN = 5 V CE = LO,
EN1 = LO, EN2 = HI
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 active
2.9
3
25
25
300
K_ISET/R_ISET
3.1
V
ms
ms
1500 mA
A
K_ISET
I_PRECHG
K_PRECHG
Fast charge current factor
Pre-charge current
Pre-charge current factor
I_TERM
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
K_PRECHG/R_ISET
70
88
975 AΩ
A
106 AΩ
0.09×I_CHG
0.1×I_CHG 0.11×I_CHG
A
0.027×I_CHG 0.033×I_CHG 0.040×I_CHG
I_BIAS(ITERM)
I_TERM
Current for external termination-setting resistor
Termination current threshold (externally set)
(bq24074)
V_IN > V_UVLO and V_IN > V_BAT + V_IN(DT)
72
75
K_ITERM × R_ITERM / R_ISET
78 mA
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
0.008
0.0300
0.0100
0.0375
A
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
ms
V_BAT(REG)
–100mV
V_BAT(REG)
–60mV
V
t_DGL(RCH)
Deglitch time, recharge threshold detected
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 ms fall-time
V_BAT = 2.5V
BAT high or low
62.5
ms
20
ms
5
7.5
10 mA
250
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
NTC bias current
V_HOT
High temperature trip point
V_HYS(HOT)
Hysteresis on high trip point
V_COLD
Low temperature trip point
V_HYS(COLD)
Hysteresis on low trip point
t_DGL(TS)
Deglitch time, pack temperature fault detection
V_DIS(TS)
TS function disable threshold (bq24072, bq24073)
THERMAL REGULATION
V_IN > 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
TS unconnected
72
270
2000
75
300
30
2100
300
50
V_IN - 200mV
78 mA
330 mV
mV
2200 mV
mV
ms
V
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 © 2008–2010, Texas Instruments Incorporated
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