FAN5400_11 FAIRCHILD [Fairchild Semiconductor], FAN5400_11 Datasheet - Page 18

• Manufacturer Part Number: FAN5400_11
• Description: FAN5400 / FAN5401 / FAN5402 / FAN5403 / FAN5404 / FAN5405 USB-Compliant Single-Cell Li-Ion Switching Charger
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

Table 3. OREG Bits (OREG[7:2]) vs. Charger V
(V
The following charging parameters can be programmed by
the host through I
Table 4. Programmable Charging Parameters
Output Voltage Regulation
Battery Charging Current Limit
Input Current Limit
Charge Termination Limit
Weak Battery Voltage
© 2009 Fairchild Semiconductor Corporation
FAN5400 Family • Rev. 1.0.7
Decimal Hex VOREG
OREG
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
0
1
2
3
4
5
6
7
8
9
) Float Voltage
Parameter
0A
0B
0C
0D
0E
1A
1B
1C
1D
1E
00
01
02
03
04
05
06
07
08
09
0F
10
11
12
13
14
15
16
17
18
19
2
C:
3.50
3.52
3.54
3.56
3.58
3.60
3.62
3.64
3.66
3.68
3.70
3.72
3.74
3.76
3.78
3.80
3.82
3.84
3.86
3.88
3.90
3.92
3.94
3.96
3.98
4.00
4.02
4.04
4.06
4.08
4.10
Decimal Hex VOREG
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
Name
I
V
V
OCHRG
I
I
TERM
INLIM
OREG
LOWV
2C
2D
3C
3D
20
21
22
23
24
25
26
27
28
29
2A
2B
2E
2F
30
31
32
33
34
35
36
37
38
39
3A
3B
3E
REG2[7:2]
REG4[6:4]
REG1[7:6]
REG4[2:0]
REG1[5:4]
Register
4.14
4.16
4.18
4.20
4.22
4.24
4.26
4.28
4.30
4.32
4.34
4.36
4.38
4.40
4.42
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
4.44
OUT
18
A new charge cycle begins when one of the following occurs:



Charge Current Limit (I
Table 5. I
of I
Termination Current Limit
Current charge termination is enabled when TE (REG1[3])=1.
Typical termination current values are given in Table 6.
Table 6. I
(REG4[2:0]) and R
When the charge current falls below I
stops and the STAT bits change to READY (00) for about
500ms while the IC determines whether the battery and
charging source are still connected. STAT then changes to
CHARGE DONE (10), provided the battery and charger are
still connected.
I
TERM
DEC
0
1
2
3
4
5
6
7
OCHARGE
0
1
2
3
4
5
6
7
The battery voltage falls below V
VBUS Power On Reset (POR) clears and the battery
voltage is below the weak battery threshold (V
This occurs for all versions except the FAN5401.
CONTROL1 (R1) register.
CE or HZ_MODE is reset through I
V
FAN5400 - FAN5402
(mV)
RSENSE
10.2
13.6
17.0
20.4
23.8
27.2
OCHARGE
TERM
3.4
6.8
Bits and R
BIN
000
001
010
011
100
101
110
111
Current as Function of I
68m 100m
100
150
200
250
300
350
400
(REG4 [6:4]) Current as Function
I
50
SENSE
TERM
HEX
00
01
02
03
04
05
06
07
SENSE
(mA)
Resistor Values
102
136
170
204
238
272
34
68
OCHARGE
Resistor Values
V
(mV)
RSENSE
37.4
44.2
51.0
57.8
64.6
71.4
78.2
85.0
V
FAN5403 - FAN5405
OREG
(mV)
RSENSE
13.2
16.5
19.8
23.1
26.4
3.3
6.6
9.9
)
TERM
- V
68m
www.fairchildsemi.com
I
1050
1150
1250
, PWM charging
550
650
750
850
950
OCHARGE
TERM
RCH
68m 100m
146
194
243
291
340
388
I
49
97
2
TERM
C write to
Bits
100m
(mA)
(mA)
374
442
510
578
646
714
782
850
LOWV
132
165
198
231
264
33
66
99
).