Datasheet

ADP1046A Data Sheet
Rev. 0 | Page 2 of 88
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Typical Application Circuit ............................................................. 1
Revision History ............................................................................... 3
Specifications ..................................................................................... 4
Absolute Maximum Ratings ............................................................ 9
Thermal Resistance ...................................................................... 9
Soldering ........................................................................................ 9
ESD Caution .................................................................................. 9
Pin Configuration and Function Descriptions ........................... 10
Typical Performance Characteristics ........................................... 12
Theory of Operation ...................................................................... 14
Current Sense .............................................................................. 15
Voltage Sense and Control Loop .............................................. 16
ADCs ............................................................................................ 16
VS1 Operation (VS1) ................................................................. 16
VS2 Operation (VS2) ................................................................. 17
VS3 Operation (VS3+, VS3−) ................................................... 17
Voltage Line Feedforward and ACSNS.................................... 17
Digital Filter ................................................................................ 17
PWM and Synchronous Rectifier Outputs
(OUTA, OUTB, OUTC, OUTD, OUTAUX, SR1, SR2) ........ 18
Synchronous Rectification ........................................................ 19
Synchronous Rectifier (SR) Delay ............................................ 19
Light Load Mode ........................................................................ 19
Modulation Limit ....................................................................... 19
Soft Start ...................................................................................... 20
OrFET Control (GATE Pin) ..................................................... 22
VDD ............................................................................................. 24
VDD/VCORE OVLO ................................................................ 24
Power Good ................................................................................. 24
Current Sharing .......................................................................... 25
Power Supply System and Fault Monitoring ............................... 27
Flags .............................................................................................. 27
Monitoring Functions ................................................................ 27
Voltage Readings ........................................................................ 27
Current Readings ........................................................................ 27
Power Readings ........................................................................... 28
Power Monitoring Accuracy ..................................................... 28
First Flag Fault ID and Value Registers ................................... 28
External Flag Input (FLAGIN Pin) .......................................... 28
Temperature Readings (RTD Pin) ........................................... 28
Overtemperature Protection (OTP) ........................................ 29
Overcurrent Protection (OCP) ................................................ 29
Constant Current Mode ............................................................ 30
Overvoltage Protection (OVP) ................................................. 30
Undervoltage Protection (UVP) .............................................. 31
AC Sense (ACSNS)..................................................................... 31
Volt-Second Balance .................................................................. 31
Digital Load Line and Slew Rate .............................................. 32
Power Supply Calibration and Trim ............................................ 33
CS1 Trim ...................................................................................... 33
CS2 Trim ...................................................................................... 33
Voltage Calibration and Trim ................................................... 34
Output Voltage Setting (VS3+, VS3− Trim) ........................... 34
VS1 Trim ...................................................................................... 34
VS2 Trim ...................................................................................... 34
RTD/OTP Trim .......................................................................... 34
ACSNS Calibration and Trim ................................................... 35
Layout Guidelines ........................................................................... 36
CS2+ and CS2− ........................................................................... 36
VS3+ and VS3−........................................................................... 36
VDD ............................................................................................. 36
SDA and SCL .............................................................................. 36
CS1 ............................................................................................... 36
Exposed Pad ................................................................................ 36
VCORE ........................................................................................ 36
RES ............................................................................................... 36
RTD .............................................................................................. 36
AGND, DGND, and PGND ...................................................... 36
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C Interface Communication ...................................................... 37
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C Overview ............................................................................... 37
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C Address .................................................................................. 37
Data Transfer............................................................................... 37
General Call Support ................................................................. 39
10-Bit Addressing ....................................................................... 39
Fast Mode .................................................................................... 39
Repeated Start Condition .......................................................... 39
Electrical Specifications ............................................................. 39