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Analog Devices Semiconductor Electronic Components Datasheet

ADP1055 Datasheet

Digital Controller

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ADP1055 pdf
Data Sheet
Digital Controller for Power Supply
Applications with PMBus Interface
ADP1055
FEATURES
−40°C to +125°C operation
PMBus Revision 1.2 compliant with PEC and extended
manufacturer specific commands
32-bit password protection with command masking
64 address selections (16 base addresses, expandable to 64)
6 PWM control signals, 625 ps resolution
Frequency from 48 kHz to 1 MHz
Duty cycle double update rate
Digital control loop (PID + additional pole or zero
configurability)
Programmable loop filters (CCM, DCM, low/normal
temperature)
Fast line voltage feedforward
Adaptive dead time compensation for improved efficiency
Remote voltage sense
Redundant programmable OVP
Current sense
Primary side cycle-by-cycle fast protection
Secondary side cycle-by-cycle fast overcurrent protection
Secondary side averaged reverse current protection using
diode emulation mode with fixed debounce
Synchronous rectifier control for improved efficiency
in light load mode
Nonlinear gain for faster transient response from DCM to CCM
Frequency synchronization
Soft start and soft stop functionality
Average and peak constant current mode
External PN junction temperature sensing
4 GPIOs (2 GPIOs configurable as active clamp snubber PWMs)
Extended black box data recorder for fault recording
User trimming on input and output voltages and currents
Digital current sharing
APPLICATIONS
Isolated dc-to-dc power supplies and modules
Redundant power supply systems
GENERAL DESCRIPTION
The ADP1055 is a flexible, feature-rich digital secondary side
controller that targets ac-to-dc and isolated dc-to-dc secondary
side applications. The ADP1055 is optimized for minimal
component count, maximum flexibility, and minimum design
time. Features include differential remote voltage sense, primary
and secondary side current sense, pulse-width modulation (PWM)
generation, frequency synchronization, redundant OVP, and
current sharing. The control loop digital filter and compensation
terms are integrated and can be programmed over the PMBus™
interface. Programmable protection features include
overcurrent (OCP), overvoltage (OVP) limiting, undervoltage
lockout (UVLO), and external overtemperature (OTP).
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 programmable protection circuits.
A comprehensive GUI is provided for easy design of loop filter
characteristics and programming of the safety features. The
industry-standard PMBus provides access to the many monitoring
and system test functions. The ADP1055 is available in a 32-lead
LFCSP and operates from a single 3.3 V supply.
TYPICAL APPLICATION DIAGRAM
DC
INPUT
VOUT
LOAD
DRIVER
iCoupler ®
DRIVER
SR1 SR2
CS1
OUTA
OUTB
OUTC
OUTD
VFF
CS2– CS2+
ADP1055
RES ADD JTD JRTN GPIO1 TO GPIO4 CTRL SMBALRT
OVP
SDA SCL
VS+ VS–
ISHARE
SYNC
NC
VCORE
VDD AGND DGND
VDD
Figure 1.
PMBus
Rev. A
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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 ©2014–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADP1055 Datasheet

Digital Controller

No Preview Available !

ADP1055 pdf
ADP1055
Data Sheet
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
Rev. A | Page 2 of 140


Part Number ADP1055
Description Digital Controller
Maker Analog Devices
Total Page 30 Pages
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