LTC4245 LINER [Linear Technology], LTC4245 Datasheet - Page 31

• Manufacturer Part Number: LTC4245
• Description: Multiple Supply Hot Swap Controller with I2C Compatible Monitoring
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
Table 8. ALERT Register B (01h) – Read/Write
Table 9. CONTROL Register C (02h) – Read/Write
Table 10. ON Register D (03h) – Read/Write
BIT
B7
B6
B5
B4
B3
B2
B1
B0
BIT
C7
C6
C5
C4
C3
C2
C1
C0
BIT
D7
D6
D5
D4
D3
D2
D1
D0
NAME
–12V FET On Status
NAME
GPIO1 State Change Alert
BD_SEL# State Change Alert
FET Short Alert
PGI Fault Alert
Alert Present
Power Bad Alert
Overcurrent Alert
Undervoltage Alert
NAME
ADC Free-Run Disable
Sequencing Enable
Mass Write Enable
PGI Fault Autoretry
PGI Pin Disable
Reserved
Overcurrent Autoretry
Undervoltage Autoretry
3.3V FET On Status
5V FET On Status
12V FET On Status
–12V FET On Control
3.3V FET On Control
5V FET On Control
12V FET On Control
U
U
W
OPERATION
Indicates State of –12V FET. Read Only Bit; 1 = FET On, 0 = FET Off
Indicates State of 3.3V FET. Read Only Bit; 1 = FET On, 0 = FET Off
Indicates State of 5V FET. Read Only Bit; 1 = FET On, 0 = FET Off
Indicates State of 12V FET. Read Only Bit; 1 = FET On, 0 = FET Off
Turns –12V FET On and Off. Not used if CFG Pin is Not Low. Cannot Write 1 if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
Turns 3.3V FET On and Off. Cannot Write 1 if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
Turns 5V FET On and Off. Cannot Write 1 if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
Turns 12V FET On and Off. Also Turns –12V FET On and Off if CFG Pin is Not Low. Cannot Write 1
if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
OPERATION
Enables Alert When GPIO1 Changes State; 1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert When BD_SEL# Changes State; 1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert for FET Short Condition; 1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert When a PGI Fault Occurs; 1 = Enable Alert, 0 = Disable Alert (Default)
ALERT# Pin Open-Drain Output State; 1 = Pulls Low, 0 = High Impedance (Default)
Enables Alert When Output Power is Bad; 1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert for Overcurrent Condition; 1 = Enable Alert, 0 = Disable Alert (Default)
Enables Alert for Undervoltage Condition; 1 = Enable Alert, 0 = Disable Alert (Default)
OPERATION
Disable ADC Free Running Operation to Allow On-Demand Measurement and Writes to ADC
Registers; 1 = Halt ADC Free Running, 0 = ADC Free Running (Default)
Enables Supplies to Turn-On in a Set Sequence
1 = Sequencing Enabled, 0 = Sequencing Disabled (Default)
Enables Mass Write Using Address (0010 111)b
1 = Mass Write Enabled (Default), 0 = Mass Write Disabled
Enables Autoretry After a PGI Fault; 1 = Retry Enabled, 0 = Retry Disabled (Default)
Enables PGI Pin Going Low During Normal Operation to Shut Off Switches
1 = PGI Pin Disabled (Default), 0 = PGI Pin Enabled
Not Used
Enables Autoretry After an Overcurrent Fault; 1 = Retry Enabled, 0 = Retry Disabled (Default)
Enables Autoretry After an Undervoltage Fault; 1 = Retry Enabled (Default), 0 = Retry Disabled
U
LTC4245
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