ADP1043A Controller Datasheet

ADP1043A Datasheet PDF, Equivalent


Part Number

ADP1043A

Description

Digital Controller

Manufacture

Analog Devices

Total Page 30 Pages
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ADP1043A
FEATURES
Integrates all typical controller functions
Digital control loop
Remote and local voltage sense
Primary and secondary side current sense
PWM control
Synchronous rectifier control
Current sharing
Integrated programmable loop filter
I2C interface
Extensive fault detection and protection
Extensive programming
Fast calibration
EEPROM
Standalone or microcontroller control
APPLICATIONS
AC-to-DC power supplies
Isolated dc-to-dc power supplies
Redundant power supplies
Parallel power supplies
Server, storage, network, and communications infrastructure
Digital Controller for Isolated
Power Supply Applications
ADP1043A
GENERAL DESCRIPTION
The ADP1043A is a secondary side power supply controller IC
designed to provide all the functions that are typically needed in
an ac-to-dc or isolated dc-to-dc control application.
The ADP1043A is optimized for minimal component count,
maximum flexibility, and minimum design time. Features
include remote voltage sense, local voltage sense, primary and
secondary side current sense, pulse-width modulation (PWM)
generation, and hot-swap sense and control. The control loop is
digital with an integrated programmable digital filter. Protection
features include current limiting, ac sense, undervoltage lockout
(UVLO), and overvoltage protection (OVP).
The built-in EEPROM provides extensive programming of the
integrated loop filter, PWM signal timing, inrush current, and
soft start timing and sequencing. Reliability is improved through
a built-in checksum and redundancy of critical circuits.
A comprehensive GUI is provided for easy design of loop filter
characteristics and programming of the safety features. The
industry-standard I2C bus provides access to the many moni-
toring and system test functions.
The ADP1043A is available in a 32-lead LFCSP and operates
from a single 3.3 V supply.
PFC
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AC
INPUT
DRIVER
TYPICAL APPLICATION CIRCUIT
ADuM1410
DRIVER
DRIVER
SR1 SR2 ACSNS
CS1
PGND CS2– CS2+
VS1 GATE VS2
VS3+
OUTA
OUTB
OUTC
OUTD
OUTAUX
RES ADD RTD VCORE FLAGIN PSON PGOOD2 PGOOD1 SDA SCL
VS3–
SHAREo
SHAREi
VDD DGND AGND
VDD
Figure 1.
MICROCONTROLLER
LOAD
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.

ADP1043A
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 
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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 
I2C 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


Features Digital Controller for Isolated Power Su pply Applications ADP1043A FEATURES Int egrates all typical controller function s Digital control loop Remote and local voltage sense Primary and secondary si de current sense PWM control Synchronou s rectifier control Current sharing Int egrated programmable loop filter I2C in terface Extensive fault detection and p rotection Extensive programming Fast ca libration EEPROM Standalone or microcon troller control GENERAL DESCRIPTION Th e ADP1043A is a secondary side power su pply controller IC designed to provide all the functions that are typically ne eded in an ac-to-dc or isolated dc-to-d c control application. The ADP1043A is optimized for minimal component count, maximum flexibility, and minimum design time. Features include remote voltage sense, local voltage sense, primary and secondary side current sense, pulse-wi dth modulation (PWM) generation, and ho t-swap sense and control. The control l oop is digital with an integrated programmable digital filter. .
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