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ADP1043AACPZ-RL датащи(PDF) 4 Page - Analog Devices

номер детали ADP1043AACPZ-RL
подробное описание детали  Digital Controller for Isolated Power Supply Applications
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
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ADP1043AACPZ-RL датащи(HTML) 4 Page - Analog Devices

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ADP1043A
Rev. 0 | Page 4 of 72
The ADP1043A is a secondary side controller for switch mode
power supplies (SMPS). It is designed for use in isolated redun-
dant applications. The ADP1043A 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
Current, voltage, and temperature sense
OrFET control
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 multipath approach (patent
pending). The ADP1043A combines 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 to allow easy programming
of filter characteristics, which is of great value in customizing
and debugging designs.
The PWM block generates up to seven 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.
A current share bus interface provides 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 protec-
tion (UVP), ground continuity monitoring, and ac sense.
All these features are programmable through the I2C bus inter-
face. 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 I2C bus interface.
The internal EEPROM can store all programmed values and
allows standalone control without a microcontroller. A free,
downloadable GUI is available that provides all the necessary
software to program the ADP1043A. For more information
about the GUI, contact Analog Devices, Inc., for the latest
software and a user guide.
The ADP1043A operates from a single 3.3 V supply and is
specified from −40°C to +85°C.
FUNCTIONAL BLOCK DIAGRAM
RES
SHAREo
VS3–
VS3+
PGOOD1
VDD
OUTA
OUTB
SR1
SR2
OUTC
OUTD
CS1
PSON
SCL
SDA
VCORE
AGND
OUTAUX
PGOOD2
SHAREi
FLAGIN
DGND
RTD
ADD
ADC
ADC
ADC
ADC
UVLO
PWM
ENGINE
VREF
LDO
ADC
ADC
8kB
EEPROM
DIGITAL
CORE
I2C
INTERFACE
PWM
OSC
Figure 2.


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