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ADM1041A Datasheet(PDF) 2 Page - Analog Devices

Part No. ADM1041A
Description  Secondary-Side Controller with Current Share and Housekeeping
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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ADM1041A Datasheet(HTML) 2 Page - Analog Devices

 
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ADM1041A
Rev. 0 | Page 2 of 56
TABLE OF CONTENTS
General Description ......................................................................... 3
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
ISHARE Drive Amplifier ................................................................ 22
Differential Sense Amplifier ..................................................... 22
ISHARE Error Amplifier................................................................. 22
ISHARE Clamp ................................................................................ 22
SHARE_OK Detector ................................................................ 23
Pulse/ACSENSE2............................................................................. 24
Pulse ............................................................................................. 24
ACSENSE.......................................................................................... 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
REVISION HISTORY
7/05—Revision 0: Initial Version


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