FAN54300 Datasheet, PDF (35/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

Bit Name Type
Description
CONTROL1_U
Reg Addr: 1
Slave Addr: D6 Default = 0011 0000
USB bus current limit
Table 15. IBUSLIM: USB bus current limit
[7:6] IBUS Current Limit
7:6 IBUSLIM R/W 00
100 mA
01
500 mA
10
800 mA
11
No limit
Weak Battery Threshold. This register determines VLOWV threshold when VBUS is charging.
Table 16. V_LOWV: Weak Battery Threshold
[5:4] IBUS Current Limit
5:4 VLOWV_U R/W ₀₀
3.4 V
01
3.5 V
10
3.6 V
11
3.7 V
0: Charge termination is disabled when charging from USB.
3 TE_U R/W
1: Charge termination is enabled for USB charging.
0: USB charger is enabled.
2 CE#_U R/W _{1: USB charger is disabled. This bit is set when t15MIN expires, regardless of which input source is}
charging.
0: USB charger is not in High-Impedance Mode.
1 HZ_U R/W
1: USB charger is in High-Impedance Mode.
0
OPA_
MODE
0: Boost Mode disabled unless enabled with the OTG pin and OTG_EN HIGH.
R/W _{1: Boost Mode enabled unless HZ_U is set.}
OREG_U
Reg Addr: 2
Slave Addr: D6 Default = 0000 1010
7:2 OREGU
R/W
Charger output “float” voltage when charging from USB source.
Programmable from 3.5 to 4.44 V in 20 mV increments. Defaults to 000010 (3.54 V) (see Table 5).
1
OTG_PL
R/W
0:
1:
OTG pin is active LOW.
OTG pin is active HIGH.
0 OTG_EN
IC_INFO_U
0:
R/W _1:
OTG pin does not enable boost when HIGH.
OTG pin enables boost when HIGH.
Reg Addr: 3
Slave Addr: D4 or D6
Default = 100x x000
7:5 VENDOR R 100: Identifies Fairchild as the supplier.
4:3 PN_U
R Part number bits. FAN54300 = 10
2:0 REV
DIE_REV
R IC Revision. Revision is 1.X where X is the decimal of these 3 bits.
Reg Addr: 14H
Slave Addr: D4 or D6 Default = 0000 XXXX
7:4 Reserved R These bits return 0.
3:0 REV_D
R
Die revision. These bits uniquely identify the full revision of the IC. REV bits change whenever there is
a significant design change. REV_D bits change whenever any masks are revised.
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
35
www.fairchildsemi.com