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ADP1043 View Datasheet(PDF) - Analog Devices

Part NameDescriptionManufacturer
ADP1043 Digital Controller for Isolated Power Supply Applications ADI
Analog Devices ADI
ADP1043 Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
ADP1043
GENERAL DESCRIPTION
The ADP1043 is a secondary side controller for switch mode
power supplies (SMPS). It is designed for use in isolated redundant
applications. The ADP1043 integrates the typical functions that
are needed to control a power supply. These include
Output voltage sense and feedback
Digital loop filter compensation
PWM generation
Current sharing
OrFET control
Current, voltage, and temperature sense
Housekeeping and I2C interface
Calibration and trimming
The main function of controlling the output voltage is
performed using the feedback ADCs, the digital loop filter, and
the PWM block. The feedback ADCs use a patented multipath
approach. There is a combination of a high speed, low
resolution (fast and coarse) ADC and a low speed, high
resolution (slow and accurate) ADC. Loop compensation is
implemented using the digital filter. This PID (proportional,
integral, derivative) filter is implemented in the digital domain,
allowing easy programming of filter characteristics, which is of
great value in customizing and debugging designs. The PWM
block generates up to six programmable PWM outputs for
control of FET drivers and synchronous rectification FET
drivers. This programmability allows many traditional and
unique switching topologies to be realized.
Preliminary Technical Data
A current share bus interface is provided for parallel power
supplies. The part also has hot-swap OrFET sense and control
for N+1 redundant power supplies.
Conventional power supply housekeeping features, such as
remote and local voltage sense and primary and secondary side
current sense, are included. An extensive set of protections is
offered, including overvoltage protection (OVP), overcurrent
protection (OCP), overtemperature protection (OTP),
undervoltage protection (UVP), ground continuity monitoring,
and ac sensing.
All these features are programmable through the I2C bus
interface. This bus interface is also used to calibrate the power
supply. Other information, such as input current, output
current, and fault flags, is also available through the digital bus
interface.
The internal 1024-byte EEPROM makes it possible to store all
programmed values and allows standalone control without a
microcontroller. Approximately 700 bytes of the EEPROM are
available for user information, such as version and manufactu-
ring date.
The ADP1043 comes with a free downloadable GUI, which
provides all the necessary software to program the part.
The ADP1043 operates from a single 3.3 V supply and is
specified from −40°C to +85°C.
CS1
SR1
SR2
OUTA
OUTB
OUTC
OUTD
OUTAUX
VDD
VCORE
RES
AGND
VREF
ADC
OSC
ADC
ADC
ADC
ADC
PWM
ENGINE
UVLO
LDO
DIGITAL
CORE
8kB EEPROM
I2C
INTERFACE
ADC
ADC
IREF
DGND
ADD
RTD
Figure 2. Functional Block Diagram
ADP1043
ADC
PWM
VS3+
VS3–
SHAREo
SHAREi
PGOOD1
PGOOD2
FLAGIN
PSON
SCL
SDA
Rev. PrA | Page 2 of 8
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