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ADP1050 Datasheet

Digital Controller

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ADP1050 pdf
Data Sheet
Digital Controller for Isolated
Power Supply with PMBus Interface
ADP1050
FEATURES
GENERAL DESCRIPTION
Versatile digital voltage mode controller
High speed input voltage feedforward control
4 pulse-width modulation (PWM) logic outputs with 625 ps
resolution
Switching frequency: 49 kHz to 625 kHz
Frequency synchronization as slave device
Pulse skipping power saving mode
Prebias startup
Conditional overvoltage protection
Extensive fault detection and protection
PMBus compliant
Graphical user interface (GUI) for ease of programming
On-board EEPROM for programming and data storage
Available in a 20-lead, 4 mm × 4 mm LFCSP
−40°C to +125°C operating temperature
APPLICATIONS
High density, isolated dc-to-dc power supplies
Intermediate bus converters
High availability parallel power systems
Server, storage, industrial, networking, and communications
infrastructure
The ADP1050 is an advanced digital controller with a PMBus
interface targeting high density, high efficiency dc-to-dc power
conversion. This controller implements voltage mode control
with high speed, input voltage feedforward operation for
enhanced transient and noise performance. The ADP1050 has
four programmable pulse-width modulation (PWM) outputs
capable of controlling most high efficiency power supply
topologies, with the added control of synchronous rectification (SR).
The ADP1050 implements several features to enable a robust
system of parallel and redundant operation for customers who
require high availability. The device provides synchronization,
prebias startup, and conditional overvoltage techniques to
identify and safely shut down an erroneous power supply in
parallel operation mode.
The ADP1050 is based on flexible state machine architecture
and is programmed using an intuitive graphical user interface
(GUI). The easy to use GUI reduces design cycle time and
results in a robust, hardware coded system loaded into the built-
in EEPROM. The small size (4 mm × 4 mm) of the LFCSP
package makes the ADP1050 ideal for ultracompact, isolated
dc-to-dc power module or embedded power designs.
TYPICAL APPLICATIONS CIRCUIT
DC
INPUT
LOAD
ADuM3221
ADP3624 or
ADP3654
SR1 SR2
CS1
OUTA
OUTB
VF
ADP1050
OVP VS+ VS–
SYNI/FLGI
RES ADD RTD VCORE
VDD
PG/ALT CTRL SDA SCL AGND
PMBus
Figure 1.
Rev. 0
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rights of third parties that may result from its use. Specifications subject to change without notice. No
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2014 Analog Devices, Inc. All rights reserved.
Technical Support
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Analog Devices Semiconductor Electronic Components Datasheet

ADP1050 Datasheet

Digital Controller

No Preview Available !

ADP1050 pdf
ADP1050
Data Sheet
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Typical Applications Circuit............................................................ 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Timing Diagram ........................................................................... 7
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
PWM Outputs (OUTA, OUTB, SR1, and SR2)...................... 13
Synchronous Rectification ........................................................ 13
PWM Modulation Limit and 180° Phase Shift....................... 14
Frequency Synchronization ...................................................... 14
Output Voltage Sense and Adjustment.................................... 16
Digital Compensator.................................................................. 17
Closed-Loop Input Voltage Feedforward Control and
VF Sense ...................................................................................... 18
Open-Loop Input Voltage Feedforward Operation............... 19
Open-Loop Operation............................................................... 19
CS1 Current Sense (CS1 Pin).................................................... 20
Soft Start and Shutdown ............................................................ 20
Volt-Second Balance Control.................................................... 22
Pulse Skipping............................................................................. 23
Prebias Startup ............................................................................ 23
VDD and VCORE ...................................................................... 23
Chip Password ............................................................................ 24
Power Monitoring, Flags, and Fault Responses.......................... 25
Flags.............................................................................................. 25
Voltage Readings ........................................................................ 28
Current Readings........................................................................ 28
Power Readings........................................................................... 28
Duty Cycle Reading.................................................................... 28
Switching Frequency Reading .................................................. 28
Temperature Reading................................................................. 29
Temperature Linearization Scheme ......................................... 30
PMBus Protection Commands................................................. 30
Manufacturer Specific Protection Commands....................... 32
Manufacturer Specific Protection Responses ......................... 34
Power Supply Calibration and Trim ............................................ 35
IIN Trim (CS1 Trim).................................................................... 35
VOUT Trim (VS Trim) ................................................................. 35
VIN Trim (VF Gain Trim) .......................................................... 35
RTD and OTP Trim ................................................................... 36
Layout Guidelines........................................................................... 37
CS1 Pin ........................................................................................ 37
VS+ and VS− Pins ...................................................................... 37
VDD Pin ...................................................................................... 37
VCORE Pin ................................................................................. 37
RES Pin ........................................................................................ 37
SDA and SCL Pins...................................................................... 37
Exposed Pad................................................................................ 37
RTD Pin ....................................................................................... 37
AGND Pin ................................................................................... 37
PMBus/I2C Communication......................................................... 38
PMBus Features .......................................................................... 38
Overview ..................................................................................... 38
PMBus/I2C Address ................................................................... 38
Data Transfer............................................................................... 38
General Call Support ................................................................. 40
10-Bit Addressing....................................................................... 40
Fast Mode .................................................................................... 40
Fault Conditions ......................................................................... 40
Timeout Conditions................................................................... 40
Data Transmission Faults .......................................................... 40
Data Content Faults ................................................................... 41
EEPROM ......................................................................................... 42
EEPROM Features...................................................................... 42
EEPROM Overview ................................................................... 42
EEPROM Password.................................................................... 42
Page Erase Operation................................................................. 42
Read Operation (Byte Read and Block Read) ........................ 43
Write Operation (Byte Write and Block Write) ..................... 43
Downloading EEPROM Settings to Internal Registers......... 44
Saving Register Settings to the EEPROM ............................... 44
EEPROM CRC Checksum ........................................................ 44
Rev. 0 | Page 2 of 92
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Part Number ADP1050
Description Digital Controller
Maker Analog Devices
Total Page 30 Pages
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