BQ24050 Datasheet, PDF (4/37 Pages) Texas Instruments – 800mA Single Cell Li-Ion Battery Charger With Automatic Adaptor/USB Detection

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SLUS940A – SEPTEMBER 2009 – REVISED SEPTEMBER 2009.................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
Over junction temperature range 0°C ≤ T_J ≤ 125°C and recommended supply voltage (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
QUIESCENT CURRENT
I_OUT(PDWN)
I_OUT(DONE)
I_IN(STDBY)
Battery current into OUT pin
OUT pin current, charging terminated
Standby current into IN pin
I_CC
Active supply current, IN pin
BATTERY CHARGER FAST-CHARGE
V_IN = 0V
V_IN = 6V, V_OUT > V_OUT(REG)
TS = LO, V_IN ≤ 6V
TS = open, V_IN = 6V, TTDM – no load on OUT pin,
V_OUT > V_OUT(REG), IC enabled
1
6
125
0.8
1
V_OUT(REG)
V_{O_HT(REG)}
I_OUT(RANGE)
V_DO(IN-OUT)
Battery regulation voltage
Battery hot regulation Voltage
Programmed Output “fast charge”
current range
Drop-Out, VIN – VOUT
V_IN =5.5V, I_OUT =25mA, V_TS-45°C≤ V_TS ≤ V_TS-0°C
V_IN =5.5V, I_OUT =25mA, V_TS-60°C≤ V_TS ≤ V_TS-45°C
V_OUT(REG) > V_OUT > V_LOWV, V_IN = 5V, ISET2=Lo,
R_ISET = 675 to 10.8kΩ
Adjust VIN down until I_OUT = 0.5A, V_OUT = 4.15V,
R_ISET = 675 , ISET2=Lo (Adaptor Mode); Tj ≤
100°C
4.16
4.20
4.23
4.02
4.06
4.1
10
800
325
500
I_OUT
Output “fast charge” formula
K_ISET
Fast charge current factor
PRECHARGE – SET BY PRETERM PIN
V_OUT(REG) > V_OUT > V_LOWV, V_IN = 5V, ISET2=Lo
R_ISET = K_ISET /I_OUT 50 < I_OUT < 800 mA
R_ISET = K_ISET /I_OUT 25 < I_OUT < 50 mA
R_ISET = K_ISET /I_OUT 10 < I_OUT < 25 mA
K_ISET/R_ISET
510
540
570
480
527
600
350
520
680
V_LOWV
Pre-charge to fast-charge transition
threshold
2.4
2.5
2.6
t_DGL1(LOWV)
Deglitch time on pre-charge to
fast-charge transition
70
t_DGL2(LOWV)
Deglitch time on fast-charge to
pre-charge transition
32
I_PRE-TERM
%_PRECHG
Refer to the Termination Section
Pre-Charge Current Level, Default
Setting
Pre-charge current formula
K_PRE-CHG
% Pre-charge Factor
TERMINATION – SET BY PRE-TERM PIN
V_OUT < V_LOWV; R_PRE-TERM = High Z (≥13kΩ); R_ISET
= 1k
R_PRE-TERM = K_PRE-CHG (Ω/%) × %_PRE-CHG (%)
V_OUT < V_LOWV, V_IN = 5V, R_PRE-TERM = 2k to 10kΩ;
R_ISET = 1080Ω , R_PRE-TERM = K_PRE-CHG ×
%I_FAST-CHG, where %I_FAST-CHG is 20 to 100%
V_OUT < V_LOWV, V_IN = 5V, R_PRE-TERM = 1k to 2kΩ;
R_ISET = 1080Ω, R_PRE-TERM = K_PRE-CHG ×
%I_FAST-CHG, where %I_FAST-CHG is 10% to 20%
18
20
22
R_PRE-TERM/K_PRE-CHG
90
100
110
84
100
117
%_TERM
Termination Current Threshold,
Default Setting
Termination Current Threshold
Formula
V_OUT > V_RCH; R_PRE-TERM = High Z (≥13kΩ); R_ISET =
1k
R_PRE-TERM = K_TERM (Ω/%) × %TERM (%)
9
10
11
R_PRE-TERM/ K_TERM
K_TERM
I_PRE-TERM
% Term Factor
Current for programming the term.
and pre-chg with resistor. I_Term-Start is
the initial PRE-TERM curent.
V_OUT > V_RCH, V_IN = 5V, R_PRE-TERM = 2k to 10kΩ ;
R_ISET = 750Ω; K_TERM × %I_FAST-CHG, where
%I_FAST-CHG is 10 to 50%
V_OUT > V_RCH, V_IN = 5V, R_PRE-TERM = 1k to 2kΩ ;
R_ISET = 750Ω; K_TERM × %I_FAST-CHG, where
%I_FAST-CHG is 5 to 10%
R_PRE-TERM = 2k, V_OUT = 4.15V
182
200
216
174
199
224
71
75
81
%TERM
t_DGL(TERM)
I_Term-Start
Termination current formula
Deglitch time, termination detected
Elevated PRE-TERM current for,
t_Term-Start, during start of charge to
prevent recharge of full battery,
R_TERM/ K_TERM
29
80
85
92
t_Term-Start
Elevated termination threshold initially
active for t_Term-Start
1.25
UNIT
μA
μA
mA
V
V
mA
mV
A
AΩ
V
μs
ms
%I_OUT-CC
Ω/%
Ω/%
%I_OUT-CC
Ω/%
μA
%
ms
μA
min
4
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