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ADP1046-100-EVALZ 数据表(PDF) 4 Page - Analog Devices

部件名 ADP1046-100-EVALZ
功能描述  Digital Controller for Isolated
Download  96 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADP1046-100-EVALZ 数据表(HTML) 4 Page - Analog Devices

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ADP1046
Data Sheet
Rev. 0 | Page 4 of 96
The ADP1046 is a secondary side controller for switch mode
power supplies (SMPS). It is designed for use in isolated redun-
dant applications. The ADP1046 integrates the typical functions
that are needed to control a power supply, such as
Output voltage sense and feedback
Voltage line feedforward control
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 ADP1046 combines a high speed, low resolution (fast and
coarse) ADC with a low speed, high resolution (slow and accurate)
ADC. Loop compensation is implemented using the digital filter.
This proportional, integral, derivative (PID) filter is implemented
in the digital domain to allow easy programming of filter char-
acteristics, 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 is provided for paralleling multiple
power supplies. The ADP1046 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 (voltage continuity),
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 that is useful for power monitoring, 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 and provides all the necessary
software to program the ADP1046. To obtain the latest software
and a user guide, visit http://www.analog.com/digitalpower.
The ADP1046 operates from a single 3.3 V supply and is specified
from −40°C to +125°C.
FUNCTIONAL BLOCK DIAGRAM
RES
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
ADC
UVLO
PWM
ENGINE
VREF
LDO
ADC
ADC
8kB
EEPROM
DIGITAL
CORE
I2C
INTERFACE
PWM
OSC
1.2V
+–
0.45V
+–
V_OVP
SHAREo
ADP1046
Figure 2. ADP1046 Simplified Block Diagram


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