FAN5401 Fairchild Semiconductor, FAN5401 Datasheet - Page 34

• 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

Table 23. Register Bit Definitions
SP_CHARGER (FAN5403 – FAN5405)
SAFETY (FAN5403 – FAN5405)
MONITOR
© 2009 Fairchild Semiconductor Corporation
FAN5400 Family • Rev. 1.0.7
2:0
6:4
3:0
7
6
5
4
3
7
7
6
5
4
3
2
1
0
VBUS_VALID
ITERM_CMP
VBAT_CMP
DIS_VREG
EN_LEVEL
IO_LEVEL
Reserved
Reserved
LINCHG
VSAFE
ISAFE
T_120
ICHG
IBUS
VSP
SP
CV
Table 10
Table 19
Table 8
Table 9
See
0
0
1
0
1
0
1
0
1
0
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
R
(Continued)
Register Address: 05
Unused
1.8V regulator is ON
1.8V regulator is OFF
Output current is controlled by IOCHARGE bits
Voltage across R
R
Special charger is not active (V
Special charger has been detected and V
DISABLE pin is LOW
DISABLE pin is HIGH
Special charger input regulation voltage, see Table 8
Register Address: 06
Bit disabled and always returns 0 when read back
Sets the maximum I
Sets the maximum V
Register Address: 10H (16)
ITERM comparator output, 1 when VRSENSE > ITERM reference
Output of VBAT comparator
30mA linear charger ON
Thermal regulation comparator; when=1 and T_145=0, the charge current is limited
to 22.1mV across R
0 indicates the I
0 indicates the I
1 indicates V
1 indicates the constant-voltage loop (OREG) is controlling the charger and all
current limiting loops have released
SENSE
=68m, 221mA for 100m)
BUS
CHARGE
BUS
has passed validation and is capable of charging
SENSE
(input current) loop is controlling the battery charge current
SENSE
34
OCHARGE
OREG
for output current control is set to 22.1mV (325mA for
loop is controlling the battery charge current
used by the control circuit, see Table 10
value used by the control circuit, see Table 9
BUS
is able to stay above V
BUS
is being regulated to V
Default Value=001X X100
Default Value=0100 0000 (40H)
See Table 19
SP
)
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SP