FAN5401 Fairchild Semiconductor, FAN5401 Datasheet - Page 33

• Manufacturer Part Number: FAN5401
• Description: The FAN5401 combines a highly integrated switched-mode charger, to minimize single-cell Lithium-ion (Li-ion) charging time from a USB power source, and a boost regulator to power a USB peripheral from the battery
• Manufacturer: Fairchild Semiconductor

CONTROL1
OREG
IC_INFO
IBAT
© 2009 Fairchild Semiconductor Corporation
FAN5400 Family • Rev. 1.0.7
Table 23. Register Bit Definitions
Bit
7:6
5:4
7:2
7:5
4:3
2:0
6:4
2:0
3
2
1
0
1
0
7
3
Vendor Code
OPA_MODE
IOCHARGE
HZ_MODE
Reserved
OTG_EN
OTG_PL
RESET
ITERM
Name
OREG
V
I
REV
INLIM
LOWV
TE
CE
PN
Table 5
Table 6
Value
100
00
01
10
11
0
1
0
1
0
1
0
1
0
1
0
1
1
1
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
R
R
R
R
(Continued)
Register Address: 01
Input current limit, see Table 7
3.4V
3.5V
3.6V
3.7V
Disable charge current termination
Enable charge current termination
Charger enabled
Charger disabled
Not High-Impedance Mode
High-Impedance Mode
Charge Mode
Boost Mode
Register Address: 02
Charger output “float” voltage; programmable from 3.5 to 4.44V in 20mV
increments; defaults to 000010 (3.54V), see Table 3
OTG pin active LOW
OTG pin active HIGH
Disables OTG pin
Enables OTG pin
Register Address: 03 or 3B
Identifies Fairchild Semiconductor as the IC supplier
Part number bits, see the Ordering Info on page 1
IC Revision, revision 1.X, where X is the decimal of these three bits
Register Address: 04
Writing a 1 resets charge parameters, except the Safety register (Reg6), to their
defaults: writing a 0 has no effect; read returns 1
Programs the maximum charge current, see Table 5
Unused
Sets the current used for charging termination, see Table 6
33
Description
Default Value=0011 0000 (30H)
Weak battery voltage threshold
See Table 16
Default Value=0000 1010 (0AH)
Default Value=100X XXXX
Default Value=1000 1001 (89H)
www.fairchildsemi.com