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ADP-I2C-USB-Z датащи(PDF) 2 Page - Analog Devices

номер детали ADP-I2C-USB-Z
подробное описание детали  Digital Controller for Power Supply Applications with PMBus Interface
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ADP-I2C-USB-Z датащи(HTML) 2 Page - Analog Devices

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ADP1055
Data Sheet
Rev. A | Page 2 of 140
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Typical Application Diagram .......................................................... 1
Revision History ............................................................................... 3
Functional Block Diagram .............................................................. 4
Specifications..................................................................................... 5
Absolute Maximum Ratings.......................................................... 10
Thermal Resistance .................................................................... 10
Soldering...................................................................................... 10
ESD Caution................................................................................ 10
Pin Configuration and Function Descriptions........................... 11
Typical Performance Characteristics ........................................... 13
Controller Architecture ................................................................. 16
Start-Up and Power-Down Sequencing ...................................... 17
VDD and VCORE Pins.............................................................. 17
Power-Up and Power-Down Commands ............................... 17
Power Sequencing ...................................................................... 17
Power-Up and Soft Start Routine............................................. 17
Soft Stop Routine........................................................................ 17
VDD/VCORE OVLO ................................................................ 18
Control Loop and PWM Operation............................................. 19
Voltage Sense, Feedback, and Control Loop............................. 19
Output Voltage Sense ................................................................. 19
Digital Filter ................................................................................ 19
Digital Filter Programming Registers...................................... 20
Digital Compensation Filters During Soft Start..................... 20
Filter Transition .......................................................................... 20
PWM and Synchronous Rectifier Outputs (OUTA, OUTB,
OUTC, OUTD, SR1, SR2) ......................................................... 21
Synchronous Rectification ........................................................ 21
Modulation Limit ....................................................................... 22
Switching Frequency Programming ........................................ 22
ADCs and Telemetry...................................................................... 23
ADCs for Current Sensing ........................................................ 23
ADCs for Voltage Sensing ......................................................... 24
ADCs for Temperature Sensing................................................ 24
Theory of Operation ...................................................................... 25
Accurate Primary Overcurrent Protection ............................... 25
Primary Fast Overcurrent Protection...................................... 25
Matched Cycle-by-Cycle Current Limit (OCP Equalization)... 25
Low Temperature Filter ............................................................. 25
Voltage Loop Autocorrection ................................................... 25
Nonlinear Gain/Response ......................................................... 26
Integrator Windup and Output Voltage Regulation Loss
(Overshoot Protection) ............................................................. 26
Accurate Secondary Overcurrent Protection ......................... 26
Secondary Fast Overcurrent Protection.................................. 27
Secondary Fast Reverse Current Protection............................... 27
Feedforward and Input Voltage Sense ..................................... 27
Accurate Overvoltage and Undervoltage Protection............. 28
Fast Overvoltage Protection...................................................... 28
External Frequency Synchronization ...................................... 28
Temperature Sensing ................................................................. 29
GPIO and PGOOD Signals....................................................... 29
GPIO3 and GPIO4 as Snubber PWM Outputs...................... 31
Average Constant Current Mode ............................................. 32
32-Bit Key Code ......................................................................... 32
SR Phase-In, SR Transition, and SR Fast Phase-In ................ 33
Output Voltage Slew Rate.......................................................... 33
Adaptive Dead Time Compensation ....................................... 33
SR Delay....................................................................................... 34
Current Sharing (ISHARE Pin) ................................................ 34
Droop Sharing ............................................................................ 36
Light Load Mode and Deep Light Load Mode....................... 37
Pulse Skipping............................................................................. 37
Soft Stop....................................................................................... 37
Duty Cycle Double Update Rate .............................................. 37
Duty Balance, Volt-Second Balance, and Flux Balancing..... 38
Fault Responses and State Machine Mechanics ......................... 39
Priority of Faults ......................................................................... 39
Flags ............................................................................................. 39
First Fault ID (FFID) ................................................................. 39
Fault Condition During Soft Start and Soft Stop ................... 40
Watchdog Timer......................................................................... 40
Standard PMBus Flags............................................................... 42
Black Box Feature ........................................................................... 43
Black Box Operation.................................................................. 43
Black Box Contents .................................................................... 43
Black Box Timing ....................................................................... 44


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