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ADP1043A
TABLE OF CONTENTS
Features .............................................................................................. 1 ?
Applications ....................................................................................... 1 ?
General Description ......................................................................... 1 ?
Typical Application Circuit ............................................................. 1 ?
Revision History ............................................................................... 3 ?
Functional Block Diagram .............................................................. 4 ?
Specifications..................................................................................... 5 ?
Absolute Maximum Ratings............................................................ 8 ?
Thermal Resistance ...................................................................... 8 ?
Soldering ........................................................................................ 8 ?
ESD Caution .................................................................................. 8 ?
Pin Configuration and Function Descriptions ............................. 9 ?
Typical Performance Characteristics ........................................... 11 ?
Theory of Operation ...................................................................... 12 ?
Current Sense .............................................................................. 12 ?
Voltage Sense and Control Loop .............................................. 13 ?
ADCs ............................................................................................ 13 ?
Digital Filter ................................................................................ 14 ?
PWM and Sync Rect Outputs (OUTA, OUTB, OUTC,
OUTD, OUTAUX, SR1, SR2) ................................................... 14 ?
Synchronous Rectification ........................................................ 15 ?
Adaptive Dead Time Control.................................................... 15 ?
Light Load Mode ........................................................................ 15 ?
Modulation Limit ....................................................................... 15 ?
OrFET Control (GATE) ............................................................ 15 ?
VDD ............................................................................................. 18 ?
VDD/VCORE OVLO ................................................................ 18 ?
Power Good................................................................................. 18 ?
Soft Start ...................................................................................... 19 ?
Current Sharing (Share) ............................................................ 20 ?
Power Supply System and Fault Monitoring ............................... 22 ?
Flags .............................................................................................. 22 ?
Monitoring Functions ................................................................ 22 ?
Voltage Readings ........................................................................ 22 ?
Current Readings........................................................................ 22 ?
Power Readings........................................................................... 23 ?
Power Monitoring Accuracy ..................................................... 23 ?
First Flag Fault ID and Value Registers ................................... 23 ?
External Flag Input (FLAGIN Pin) .......................................... 23 ?
Temperature Readings (RTD Pin)............................................ 23 ?
Overtemperature Protection (OTP) ........................................ 23 ?
Overcurrent Protection (OCP) ................................................ 24 ?
Constant Current Mode ............................................................ 25 ?
Overvoltage Protection (OVP) ................................................. 25 ?
Undervoltage Protection (UVP) .............................................. 25 ?
AC Sense (ACSNS)..................................................................... 26 ?
Volt-Second Balance .................................................................. 26 ?
Load Line ..................................................................................... 26 ?
Power Supply Calibration and Trim ............................................ 27 ?
CS1 Trim...................................................................................... 27 ?
CS2 Trim...................................................................................... 27 ?
Voltage Calibration and Trim ................................................... 27 ?
Output Voltage Setting (VS3+, VS3? Trim) ........................... 28 ?
VS1 Trim...................................................................................... 28 ?
VS2 Trim...................................................................................... 28 ?
RTD/OTP Trim .......................................................................... 28 ?
Layout Guidelines....................................................................... 28 ?
Communication.............................................................................. 29 ?
I 2 C Interface ................................................................................ 29 ?
EEPROM ..................................................................................... 31 ?
Software GUI .............................................................................. 32 ?
Register Listing ............................................................................... 33 ?
Detailed Register Descriptions ..................................................... 35 ?
Fault Registers ............................................................................. 35 ?
Value Registers ............................................................................ 38 ?
Current Sense and Current Limit Registers............................ 41 ?
Voltage Sense Registers .............................................................. 46 ?
ID Registers ................................................................................. 49 ?
PWM and Synchronous Rectifier Timing Registers ............. 50 ?
Digital Filter Programming Registers ...................................... 58 ?
Adaptive Dead Time Registers ................................................. 60 ?
EEPROM Registers .................................................................... 64 ?
Resonant Mode Operation ............................................................ 65 ?
Resonant Mode Enable .............................................................. 65 ?
PWM Timing in Resonant Mode............................................. 65 ?
Synchronous Rectification in Resonant Mode ....................... 65 ?
Adjusting the Timing of the PWM Outputs ........................... 66 ?
Frequency Limit Setting ............................................................ 66 ?
Feedback Control in Resonant Mode ...................................... 66 ?
Soft Start in Resonant Mode ..................................................... 66 ?
Rev. 0 | Page 2 of 72
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