BQ24040_16 Datasheet, PDF (7/38 Pages) Texas Instruments – Single Cell Li-Ion and Li-Pol Battery Charger With Auto Start

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bq24040, bq24041, bq24045
SLUS941F – SEPTEMBER 2009 – REVISED MARCH 2015
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 UNIT
BATTERY CHARGER FAST-CHARGE
V_OUT(REG)
V_{O_HT(REG)}
I_OUT(RANGE)
Battery regulation voltage
Battery hot regulation Voltage
Programmed Output “fast charge” current
range
V_IN = 5.5V, I_OUT = 25mA,
(V_TS-45°C≤ V_TS ≤ V_TS-0°C, bq24040)
V_IN = 5.5V, I_OUT = 25mA,
(V_TS-45°C≤ V_TS ≤ V_TS-0°C, bq24045)
V_IN = 5.5V, I_OUT = 25mA,
(V_TS-45°C≤ V_TS ≤ V_TS-0°C, bq24040)
V_IN = 5.5V, I_OUT = 25mA,
(V_TS-45°C≤ V_TS ≤ V_TS-0°C, bq24045)
V_OUT(REG) > V_OUT > V_LOWV; V_IN = 5V, ISET2=Lo, R_ISET = 540
to 10.8kΩ
4.16
4.30
4.02
4.16
10
4.2
4.23
V
4.35
4.40
4.06
4.1
V
4.2
4.23
1000 mA
V_DO(IN-OUT)
Drop-Out, VIN – VOUT
Adjust VIN down until I_OUT = 0.5A, V_OUT = 4.15V, R_ISET =
540 , ISET2 = Lo (adaptor mode); T_J ≤ 100°C
I_OUT
Output “fast charge” formula
V_OUT(REG) > V_OUT > V_LOWV; V_IN = 5V, ISET2 = Lo
R_ISET = K_ISET /I_OUT; 50 < I_OUT < 1000 mA
K_ISET
Fast charge current factor
R_ISET = K_ISET /I_OUT; 25 < I_OUT < 50 mA
R_ISET = K_ISET /I_OUT; 10 < I_OUT < 25 mA
R_ISET = K_ISET /I_OUT; 50 < I_OUT < 1000 mA
K_ISET
Fast charge current factor (bq24045)
R_ISET = K_ISET /I_OUT; 25 < I_OUT < 50 mA
R_ISET = K_ISET /I_OUT; 10 < I_OUT < 25 mA
PRECHARGE – SET BY PRETERM terminal: bq24040 / bq24045; Internally Set: bq24041
325
K_ISET/R_ISET
510
540
480
527
350
520
510
560
480
557
350
555
500 mV
A
570
600 AΩ
680
585
596 AΩ
680
V_LOWV
Pre-charge to fast-charge transition threshold
I_PRE-TERM
See the Termination Section
%_PRECHG
Pre-charge current, default setting
Pre-charge current formula
V_OUT < V_LOWV; R_ISET = 1080Ω; bq24040: R_PRE-TERM= High
Z; bq24041: Internally Fixed
R_PRE-TERM = K_PRE-CHG (Ω/%) × %_PRE-CHG (%)
K_PRE-CHG
% Pre-charge Factor
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%}
TERMINATION – SET BY PRE-TERM terminal: bq24040 / bq24045
2.4
2.5
18
20
R_PRE-TERM/K_PRE-CHG%
90
100
84
100
2.6
V
22 %I_OUT-CC
110 Ω/%
117 Ω/%
%TERM
Termination Threshold Current, default
setting
Termination Current Threshold Formula,
bq24040 / bq24045
V_OUT > V_RCH; R_ISET = 1k; bq24040 / bq24045:
R_PRE-TERM= High Z
R_PRE-TERM = K_TERM (Ω/%) × %TERM (%)
9
10
R_PRE-TERM/ K_TERM
11 %I_OUT-CC
K_TERM
% Term Factor
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%
182
V_OUT > V_RCH, V_IN = 5V, R_PRE-TERM = 1k to 2kΩ ; R_ISET =
750Ω K_TERM × %Iset, where %Iset is 5 to 10%
174
Current for programming the term. and pre-
I_PRE-TERM
chg with resistor. I_Term-Start is the initial PRE- R_PRE-TERM = 2k, V_OUT = 4.15V
71
TERM curent.
200
216
Ω/%
199
224
75
81 μA
%TERM
I_Term-Start
Termination current formula
Elevated PRE-TERM current for, t_Term-Start,
during start of charge to prevent recharge of
full battery,
R_TERM/ K_TERM %
80
85
92 μA
RECHARGE OR REFRESH – bq24040 / bq24045
V_RCH
Recharge detection threshold – Normal
Temp
Recharge detection threshold – Hot Temp
V_IN = 5V, V_TS = 0.5V, V_OUT: 4.25V → V_RCH
V_IN = 5V, V_TS = 0.2V, V_OUT: 4.15V → V_RCH
V_O(REG)
–0.120
V_O(REG)–0.095
V_O(REG)–0.07
0
V
V_{O_HT(REG)}
–0.130
V_{O_HT(REG)}
–0.105
V_{O_HT(REG)}
–0.080
V
BATTERY DETECT ROUTINE – bq24040 / bq24045 (NOTE: In Hot mode V_O(REG) becomes V_{O_HT(REG)})
V_REG-BD
I_BD-SINK
VOUT Reduced regulation during battery
detect
Sink current during V_REG-BD
V_IN = 5V, V_TS = 0.5V, Battery Absent
V_BD-HI
High battery detection threshold
V_IN = 5V, V_TS = 0.5V, Battery Absent
V_O(REG)-
0.450
7
V_O(REG) -
0.150
V_O(REG)-0.400 V_O(REG)-350
V
V_O(REG)-0.100
10 mA
V_O(REG)-
0.050
V
V_BD-LO
Low battery detection threshold
V_IN = 5V, V_TS = 0.5V, Battery Absent
V_REG-BD
+0.50
V_REG-BD +0.1
V_REG-BD
+0.15
V
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