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LTC4222IUH#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
LTC4222
25
4222fb
APPLICATIONS INFORMATION
Table 3. CONTROL Registers A – Read/Write
BIT CONTROL 1 (D0h) CONTROL 2 (D4h) OPERATION
7:6 GPIO1 Configure GPIO2 Configure
FUNCTION A6 A7 GPIO PIN
Power Good (Default) 0 0 GPIO = C3
Power
Good 0 1 GPIO = C3
General Purpose Output 1 0 GPIO = A5
General Purpose Input 1 1 C6 = GPIO
5 GPIO1 Output GPIO2 Output Output Data for GPIO Pins When Configured as General Purpose Output
1 = High Impedance, 0 = Pulled Low
4 Reserved Mass Write Enable Allows Mass Write Addressing
1 = Mass Write Enabled (Default), 0 = Mass Write Disabled
3 Channel 1 FET On Control Channel 2 FET On Control On Control Bit, Latches the State of the On Pin at the End of the
Debounce Delay
1 = FET On, 0 = FET Off
2 Channel 1 Overcurrent Auto-Retry Channel 2 Overcurrent Auto-Retry Overcurrent Auto-Retry Bit
1 = Auto-Retry After Overcurrent, 0 = Latch Off After Overcurrent
(Default)
1 Channel 1 Undervoltage Auto-Retry Channel 2 Undervoltage Auto-Retry Undervoltage Auto-retry
1 = Auto-Retry After Undervoltage (Default), 0 = Latch Off After
Undervoltage
0 Channel 1 Overvoltage Auto-Retry Channel 2 Overvoltage Auto-Retry Overvoltage Auto-retry
1 = Auto-Retry After Overvoltage (Default), 0 = Latch Off After
Overvoltage
Table 4. ALERT Registers B – Read/Write
BIT ALERT 1 (D1h) ALERT 2 (D5h) OPERATION
7 Reserved Reserved Not Used
6 Reserved Reserved Not Used
5 Channel 1 FET Short Alert Channel 2 FET Short Alert Enables Alert for FET Short Condition
1 = Enable Alert, 0 = Disable Alert (Default)
4 EN1 State Change Alert EN2 State Change Alert Enables Alert When EN Changes State
1 = Enable Alert, 0 = Disable Alert (Default)
3 Channel 1 Power Bad Alert Channel 2 Power Bad Alert Enables Alert When Output Power is Bad
1 = Enable Alert, 0 = Disable Alert (Default)
2 Channel 1 Overcurrent Alert Channel 2 Overcurrent Alert Enables Alert for Overcurrent Condition
1 = Enable Alert, 0 = Disable Alert (Default)
1 Channel 1 Undervoltage Alert Channel 2 Undervoltage Alert Enables Alert for Undervoltage Condition
1 = Enable Alert, 0 = Disable Alert (Default)
0 Channel 1 Overvoltage Alert Channel 2 Overvoltage Alert Enables Alert for Overvoltage Condition
1 = Enable Alert, 0 = Disable Alert (Default)
LTC4222
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4222fb
APPLICATIONS INFORMATION
Table 5. STATUS Registers C – Read
BIT STATUS 1 (D2h) STATUS 2 (D6h) OPERATION
7 FET On FET On 1 = FET On, 0 = FET Off
6 GPIO1 Input GPIO2 Input Reports the State of the GPIO1
Pin 1 = GPIO1 High, 0 = GPIO1 Low
5 Channel 1 FET Short Status Channel 2 FET Short Status Reports the State of the GPIO2
Pin 1 = GPIO2 High, 0 = GPIO2 Low
4 EN1 Status EN2 Status Indicates If the Channel is Enabled When EN is Low
1 = EN pin Low, 0 = EN pin High
3 Channel 1 Power Bad Channel 2 Power Bad Indicates Power is Bad When FB is Low
1 = FB Low, 0 = FB High
2 Channel 1 Overcurrent Channel 2 Overcurrent Indicates Overcurrent Condition; 1 = Overcurrent, 0 = Not Overcurrent
1 Channel 1 Undervoltage Channel 2 Undervoltage Indicates Input Undervoltage When UV is Low
1 = UV Low, 0 = UV High
0 Channel 1 Overvoltage Channel 2 Overvoltage Indicates Input Overvoltage When OV is High
1 = OV High, 0 = OV Low
Table 6. FAULT Registers D – Read/Write
BIT FAULT 1 (D3h) FAULT 2 (D7h) OPERATION
7 Reserved Reserved Reserved
6 Reserved Reserved Reserved
5 Channel 1 FET Short Fault
Occurred
Channel 2 FET Short Fault
Occurred
Indicates Potential FET Short was Detected When Measured Current
Sense Voltage Exceeded 1mV While FET was Off
1 = FET was Shorted, 0 = FET is Good
4 Channel 1 EN Changed State Channel 2 EN Changed State Indicates That the LTC4215-1 was Enabled or Disabled When EN
Changed State
1 = EN Changed State, 0 = EN Unchanged
3 Channel 1 Power Bad Fault
Occurred
Channel 2 Power Bad Fault
Occurred
Indicates Power was Bad When FB Went Low
1 = FB was Low, 0 = FB was High
2 Channel 1 Overcurrent Fault
Occurred
Channel 2 Overcurrent Fault
Occurred
Indicates Overcurrent Fault Occurred
1 = Overcurrent Fault Occurred, 0 = No Overcurrent Faults
1 Channel 1 Undervoltage Fault
Occurred
Channel 2 Undervoltage Fault
Occurred
Indicates Input Undervoltage Fault Occurred When UV Went Low
1 = UV was Low, 0 = UV was High
0 Channel 1 Overvoltage Fault
Occurred
Channel 2 Overvoltage Fault
Occurred
Indicates Input Overvoltage Fault Occurred When OV Went High
1 = OV was High, 0 = OV was Low
LTC4222
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Table 7. ADC Register Data Format: ADINn, SOURCEn, SENSEn MSB Bytes – Read/Write*
BIT (7) BIT (6) BIT (5) BIT (4) BIT (3) BIT (2) BIT (1) BIT (0)
Data (9) Data (8) Data (7) Data (6) Data (5) Data (4) Data (3) Data (2)
*Set bit ADC _CONTROL(0) before writing
Table 8. ADC Register Data Format: ADINn, SOURCEn, SENSEn LSB Bytes – Read/Write*
BIT (7) BIT (6) BIT (5) BIT (4) BIT (3) BIT (2) BIT (1) BIT (0)
Data (1) Data (0) Reserved** Reserved** Reserved** Reserved** Reserved** Reserved**
*Set bit ADC _CONTROL(0) before writing
**Read as zero
APPLICATIONS INFORMATION
Table 9. ADC CONTROL Register E – Read/Write
BIT ADC_CONTROL (E4h) OPERATION
7 Reserved Reserved
6 Reserved Reserved
5 ADC Busy Status Bit That is High When the ADC is Converting. Always High in Free-Run Mode, Low When ADC is
Halted or After a Point and Shoot Conversion. Read Only
4 ADC Alert Enables the ALERT Pin to Pull Low When the ADC Finishes a Measurement
3 ADC Channel Address These Bits May Be Written to Cause the ADC to Make a Single Measurement of the Desired Channel
When the Halt Bit is High
FUNCTION SF2-0
SOURCE1 000
SOURCE2 001
ADIN1 010
ADIN2 011
SENSE1 100
SENSE2 101
2
1
0 Halt Stops the Data Converter and Enables Point and Shoot Mode
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

LTC4222IUH#PBF

Mfr. #:
Buy LTC4222IUH#PBF
Manufacturer:
Analog Devices Inc.
Description:
Hot Swap Voltage Controllers Dual Hot Swap Controller w/ADC and I2C
Lifecycle:
New from this manufacturer.
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