BQ24050 Datasheet, PDF (3/37 Pages) Texas Instruments – 800mA Single Cell Li-Ion Battery Charger With Automatic Adaptor/USB Detection

bq24050
bq24052
bq24055
www.ti.com.................................................................................................................................... SLUS940A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009
RECOMMENDED OPERATING CONDITIONS⁽¹⁾
V_IN
I_IN
I_OUT
T_J
R_PRE-TERM
R_ISET
R_TS
IN voltage range
IN operating voltage range, Restricted by V_DPM and V_OVP
Input current, IN pin
Current, OUT pin
Junction temperature
Programs precharge and termination current thresholds
Fast-charge current programming resistor
10k NTC thermistor range without entering TTDM, bq24050/55
100k NTC thermistor range without entering TTDM, bq24052
(1) Operation with V_IN less than 4.5V or in drop-out may result in reduced performance.
MIN
3.5
4.45
0
1
0.675
1.66
24
NOM
28
6.45
0.8
0.8
125
10
49.9
258
885
UNIT
V
V
A
A
°C
kΩ
kΩ
kΩ
kΩ
ELECTRICAL CHARACTERISTICS
Over junction temperature range 0°C ≤ T_J ≤ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
INPUT
UVLO
V_{HYS_UVLO}
V_IN-DT
V_HYS-INDT
t_{DGL(PG_PWR)}
t_{DGL(PG_NO-}
PWR)
V_OVP
t_DGL(OVP-SET)
V_HYS-OVP
t_DGL(OVP-REC)
Undervoltage lock-out Exit
V_IN: 0V → 4V Update based on sim/char
Hysteresis on V_{UVLO_RISE} falling
V_IN: 4V→0V,
V_{UVLO_FALL} = V_{UVLO_RISE} –V_HYS-UVLO
Input power good detection threshold (Input power good if V_IN > V_OUT + V_IN-DT); V_OUT =
is V_OUT + V_IN-DT
3.6V, V_IN: 3.5V → 4V
Hysteresis on V_IN-DT falling
V_OUT = 3.6V, V_IN: 4V → 3.5V
Deglitch time on exiting sleep.
Time measured from V_IN: 0V → 5V 1μs rise-time to
PG = low, V_OUT = 3.6V
Deglitch time on V_HYS-INDT power
down. Same as entering sleep.
Time measured from V_IN: 5V → 3.2V 1μs fall-time
to PG = High Z, V_OUT = 3.6V
Input over-voltage protection threshold V_IN: 5V → 7V (50/52/55)
Input over-voltage blanking time
V_IN: 5V → 12V
Hysteresis on OVP
V_IN: 11V → 5V
Deglitch time exiting OVP
Time measured from V_IN: 12V → 5V 1μs fall-time
to PG = LO
3.15
175
30
6.5
3.3
230
80
31
45
29
6.65
113
95
30
3.45
280
145
6.8
V_IN-DPM
USB/Adaptor low input voltage
protection. Restricts lout at V_IN-DPM
I_IN-USB-CL
USB input I-Limit 100mA
USB input I-Limit 500mA
ISET SHORT CIRCUIT TEST
Feature active in USB mode; Limit Input Source
Current to 50mA; V_OUT=3.5V; R_ISET = 825Ω
Feature active in Adaptor mode; Limit Input Source
Current to 50mA; V_OUT=3.5V; R_ISET = 825Ω
ISET2 = Float; R_ISET = 825Ω
ISET2 = High; R_ISET = 825Ω
4.34
4.24
85
430
4.4
4.46
4.3
4.36
92
100
462
500
R_{ISET_SHORT}
Highest Resistor value considered a Riset: 600Ω → 250Ω, Iout latches off. Cycle power
fault (short). Monitored for Iout>90mA to Reset. USB100 mode.
280
500
t_{DGL_SHORT}
Deglitch time transition from ISET
short to Iout disable
Clear fault by cycling IN or TS
1
I_{OUT_CL}
Maximum OUT current limit
Regulation (Clamp)
V_IN = 5V, V_OUT = 3.6V, V_ISET2 =Low, Riset: 600Ω →
250Ω, Iout latches off after t_DGL-SHORT
1.05
1.4
BATTERY SHORT PROTECTION
V_OUT(SC)
OUT pin short-circuit detection
threshold/ precharge threshold
V_OUT:3V → 0.5V, no deglitch
0.75
0.8
0.85
V_OUT(SC-HYS) OUT pin Short hysteresis
Recovery ≥ V_OUT(SC) + V_OUT(SC-HYS); Rising, no
Deglitch
77
I_OUT(SC)
Source current to OUT pin during
short-circuit detection
10
15
20
UNIT
V
mV
mV
mV
μs
ms
V
μs
mV
μs
V
mA
Ω
ms
A
V
mV
mA
Copyright © 2009, Texas Instruments Incorporated
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