FAN54300 Datasheet, PDF (41/43 Pages) Fairchild Semiconductor – USB-Compliant, Dual-Power Input, Single-Cell, Li-Ion Switching Charger with USB-OTG Boost Regulator

Bit Name Type
Description
CHARGE_STATUS
Reg Addr: 8
Slave Addr: D4 or D6
7 ITERM_CMP R ^{0: If TE = 1, (VCSIN – VBAT) < VITERM. If TE = 0, (VCSIN – VBAT) < 1 mV.}
1: If TE = 0, (VCSIN – VBAT) > VITERM. If TE = 0, (VCSIN – VBAT) > 1 mV.
6
T_120
0: The die temperature is below 120°C.
R
1: The die temperature is above 120°C.
5
ICHG
R ^{0: ICHARGE loop is controlling charge current (charger is in CC Mode).}
1: ICHARGE loop is not controlling charge current.
4
IBUS
0: IBUS is limiting charge current.
R 1: IBUS loop is not controlling charge current.
This bit always = 1 when charging from VIN.
3
CV
R
1 indicates that the constant-voltage loop (OREG) is controlling the charger and that all current
limiting loops have released. Deglitched 32ms.
2 LINCHG
1:0 Reserved
INPUT_STATUS
0: Charger is not in Linear Mode
R
1: Charger is in Linear Mode (VBAT < VSHORT).
R These bits always return 0.
Reg Addr: 9
Slave Addr: D4 or D6
7 VIN_CON
0: VIN has been less than VBAT for at least 100ms (VIN is disconnected).
R 1: VIN > VBAT and VIN > 4.5 V for at least 4ms (VIN is connected).
This bit is mirrored in SP_CHARGER_U[3] and SP_CHARGER_V[6].
6 VIN_VALID
R ^{0: VIN has not passed validation.}
1: VIN has passed validation and can be used as a charging source.
5 VBUS_CON
R ^{0: VBUS has been less than VBAT for at least 100ms (VBUS is disconnected).}
1: VBUS > VBAT and VBUS > 4.5 V for at least 4ms (VBUS is connected).
0: VBUS has not passed validation.
4 VBUS_VALID R 1: VBUS has passed validation and can be used as a charging source.
This bit is mirrored in SP_CHARGER_U[6].
3 SOURCE
2:0 Reserved
R ^{0: VIN is used for IC power and charging.}
1: VBUS is used for IC power and charging.
R These bits always return 0.
© 2010 Fairchild Semiconductor Corporation
FAN54300 • Rev. 1.0.4
41
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