Document
Data Sheet
3-Channel Digital Power Supply Controller
ADP1053
FEATURES
Configurable 8-PWM engine with up to 3 channels 2 independent digitally controlled channel outputs Voltage mode PWM control with 625 ps resolution Remote voltage sensing on both channels Programmable compensation filters Voltage feedforward option Flexible start-up sequencing and tracking Switching frequency: 50 kHz to 625 kHz Frequency synchronization Independent channel protections: OVP and OCP 2 independent OTP circuits Programmable fault protection sequence Volt-second balance and dual-phase current balance
for interleaved configurations On-board EEPROM PMBus-compliant Graphical user interface (GUI) for ease of programming Available in a 40-lead, 6 mm × 6 mm LFCSP
APPLICATIONS
AC-to-DC power supplies Isolated dc-to-dc power supplies Intermediate rail power supplies Nonisolated dc-to-dc power converter
GENERAL DESCRIPTION
The ADP1053, based on a voltage mode PWM architecture, is a flexible, application dedicated digital controller designed for isolated and nonisolated dc-to-dc power supply applications. The ADP1053 enables highly efficient power supply design and facilitates the introduction of intelligent power management techniques to improve energy efficiency at a system level.
The ADP1053 provides control, monitoring, and protection of up to three independent channel outputs. The eight flexible PWM outputs can be configured as three independent channels: two regulated channels with feedback control plus one additional unregulated channel with a fixed duty cycle. The frequency of these three channels can be programmed individually from 50 kHz to 625 kHz; all channels can be synchronized internally or to an external signal.
All eight PWM outputs can also be assigned to enable a singlechannel solution, which may be required in high power, high efficiency applications.
Features include differential voltage sensing, fast current sensing, flexible start-up sequencing and tracking, and synchronization between devices to reduce low frequency system noise. Protection and monitoring features include overcurrent protection (OCP), undervoltage protection (UVP), overvoltage protection (OVP), and overtemperature protection (OTP).
SIMPLIFIED TYPICAL APPLICATION CIRCUIT
VIN_DC
DRIVER
DRIVER
VOUT A+
DRIVER
RSENSE
LOAD VOUT A–
PWM OUTPUTS
ADP1053
CS2–_A CS2+_A
VS+_A
iCoupler
VS–_A
10241-001
DUPLICATE THE ABOVE SCHEMATICS FOR CHANNEL B
VOUT B+ VOUT B–
Figure 1.
Rev. A
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
©2012 Analog Devices, Inc. All rights reserved.
ADP1053
TABLE OF CONTENTS
Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Simplified Typical Application Circuit .......................................... 1 Revision History ............................................................................... 3 Functional Block Diagram .............................................................. 4 Specifications..................................................................................... 5 Absolute Maximum Ratings............................................................ 9
Thermal Resistance ...................................................................... 9 Soldering........................................................................................ 9 ESD Caution.................................................................................. 9 Pin Configuration and Function Descriptions........................... 10 Application Circuits ....................................................................... 12 Theory of Operation ...................................................................... 14 PWM Outputs (OUT1 to OUT8) ............................................ 14 Frequency Synchronization ...................................................... 16 Voltage Sense............................................................................... 16 Current Sense.............................................................................. 17 SR FETs Reverse Current Protection ....................................... 19 Control Loops and Feedback References ................................ 19 .