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ADM1041A
TABLE OF CONTENTS
General Description.........................................................................3
Rev. 0 | Page 2 of 56
Sample Application Circuit Description...................................3
Specifications.....................................................................................6
Absolute Maximum Ratings..........................................................13
Thermal Characteristics............................................................13
ESD Caution................................................................................13
Pin Configuration and Function Descriptions...........................14
Terminology................................................................................16
Theory of Operation......................................................................18
Power Management....................................................................18
Gain Trimming and Configuration.........................................18
Differential Remote Sense Amplifier.......................................19
Set Load Voltage.........................................................................19
Load Overvoltage (OV).............................................................19
Local Voltage Sense....................................................................19
Local Overvoltage Protection (OVP) ......................................19
Local Undervoltage Protection (UVP)....................................19
False UV Clamp..........................................................................19
Voltage Error Amplifier.............................................................20
Main Voltage Reference.............................................................20
Current-Sense Amplifier...........................................................20
Current Sensing..........................................................................21
Current-Transformer Input ......................................................21
Current-Sense Calibration........................................................21
Current-Limit Error Amplifier.................................................21
Overcurrent Protection .............................................................22
Current Share..............................................................................22
Current-Share Offset..................................................................22
I
SHARE
Drive Amplifier................................................................22
Differential Sense Amplifier .....................................................22
REVISION HISTORY
I
SHARE
Error Amplifier................................................................. 22
I
SHARE
Clamp ................................................................................ 22
SHARE_OK Detector................................................................ 23
Pulse/AC
SENSE
2............................................................................. 24
Pulse............................................................................................. 24
AC
SENSE
.......................................................................................... 24
OrFET Gate Drive...................................................................... 25
Oscillator and Timing Generators............................................... 27
Logic I/O and Monitor Pins...................................................... 27
SMBus Serial Port....................................................................... 30
Microprocessor Support............................................................30
Broadcasting................................................................................ 30
SMBus Serial Interface............................................................... 30
General SMBus Timing............................................................. 31
SMBus Protocols for RAM and EEPROM.............................. 33
SMBus Read Operations ........................................................... 35
SMBus Alert Response Address (ARA).................................. 36
Support for SMBus 1.1............................................................... 36
Layout Considerations............................................................... 36
Power-Up Auto-Configuration................................................ 36
Extended SMBus Addressing.................................................... 37
Backdoor Access......................................................................... 37
Register Listing............................................................................... 38
Detailed Register Descriptions..................................................... 39
Manufacturing Data...................................................................48
Microprocessor Support................................................................ 49
Test Name Table.............................................................................. 51
Outline Dimensions....................................................................... 53
Ordering Guide .......................................................................... 53
7/05—Revision 0: Initial Version