FAN54300 Datasheet, PDF (38/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

Bit Name Type
Description
CONTROL0_V
Reg Addr: 0
Slave Addr: D4 Default = x1xx 0xxx
TMR_RST W Writing a 1 resets the t32SEC timer. Writing a 0 has no effect.
SRST
R Returns the SRST pin level (1 = SRST pin HIGH).
6
EN_STV
0:
R/W _1:
STAT pin does not go LOW when charging from VIN source.
STAT pin function is enabled for VIN source.
Table 22. VIN Charger Status Bits
00 Normal (no fault)
5:4 STAT_V R _{01 Charge in progress from VIN source}
10 Charge Done
11 VIN charger fault
3 Reserved R This bit returns 0.
Delineates VIN Charger Faults
Table 23. VIN Charger Fault Bits
Bits
210
Charger Mode
0 0 0 Normal (no fault)
2:0 FAULT_V R
0 0 1 VIN > VINOVP
0 1 0 Sleep Mode: VIN < VBAT
0 1 1 Poor VIN input source
1 0 0 Battery OVP
1 0 1 Thermal shutdown
1 1 0 Timer fault
1 1 1 No battery
CONTROL1_V
Reg Addr: 1
Slave Addr: D4 Default = 0111 0000
7:6
Reserved
R/W
These bits have no effect on IC operation. Input current is not limited by the IC when charging from
VIN.
5:4 VLOWV_V R/W See Table 16. VLOWV: Weak Battery Threshold
0: Charge termination is disabled when charging from VIN.
3
TE_V
R/W _{1: Charge termination is enabled for VIN charging.}
0: VIN charger is enabled.
2 CE#_V R/W _{1: VIN charger is disabled. This bit is set when t15MIN expires, regardless of which input source is}
charging.
0: VIN charger is not in High-Impedance Mode.
1
HZ_V
R/W _{1: VIN charger is in High-Impedance Mode.}
0 Reserved R This bit returns 0.
OREG_V
Reg Addr: 2
Slave Addr: D4 Default = 0000 1010
7:2 OREGV
R/W
Charger output “float” voltage when charging from VIN source.
Programmable from 3.5 to 4.44 V in 20 mV increments. Defaults to 000010 (3.54 V) (see Table 5).
1:0 Reserved R These bits return 10.
IC_INFO_V
Reg Addr: 3
Slave Addr: D4 Default = 100x x000
7:5 VENDOR R 100: Identifies Fairchild as the supplier.
4:3 PN_V
R Part number bits: FAN54300 = 00
2:0 REV
R IC Revision: Revision is 1.X, where X is the decimal of these 3 bits.
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
38
www.fairchildsemi.com