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PDF ADP1046A Data sheet ( Hoja de datos )
| Número de pieza | ADP1046A | |
| Descripción | Digital Controller | |
| Fabricantes | Analog Devices | |
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Data Sheet
Digital Controller for Isolated
Power Supply Applications
ADP1046A
FEATURES
Integrates all typical PWM controller functions
7 PWM control signals
Digital control loop
Integrated programmable loop filters
Programmable voltage line feedforward
Dedicated soft start filter
Remote and local voltage sense
Primary and secondary side current sense
Synchronous rectifier control
Current sharing
OrFET control
I2C interface
Extensive fault detection and protection
Extensive programming and telemetry
Fast digital calibration
User accessible EEPROM
APPLICATIONS
AC-to-DC power supplies
Isolated dc-to-dc power supplies
Redundant power supply systems
Server, storage, network, and communications
infrastructure
GENERAL DESCRIPTION
The ADP1046A is a flexible, digital secondary side controller
designed for ac-to-dc and isolated dc-to-dc secondary side
applications. The ADP1046A is pin-compatible with the
ADP1043A and offers several enhancements and new features,
including voltage feedforward and improved loop response to
maximize efficiency.
The ADP1046A is optimized for minimal component count,
maximum flexibility, and minimum design time. Features
include local and remote voltage sense, primary and secondary
side current sense, digital pulse-width modulation (PWM)
generation, current sharing, and redundant OrFET control. The
control loop digital filter and compensation terms are integrated
and can be programmed over the I2C interface. Programmable
protection features include overcurrent protection (OCP), over-
voltage protection (OVP), undervoltage lockout (UVLO), and
overtemperature protection (OTP).
The built-in EEPROM provides extensive programming of the
integrated loop filter, PWM signal timing, inrush current, and
soft start timing and sequencing. Reliability is improved through
a built-in checksum and programmable protection circuits.
A comprehensive GUI is provided for easy design of loop
filter characteristics and programming of the safety features.
The industry-standard I2C bus provides access to the many
monitoring and system test functions.
The ADP1046A is available in a 32-lead LFCSP and operates
from a single 3.3 V supply.
TYPICAL APPLICATION CIRCUIT
DC
INPUT
LOAD
DRIVER
iCoupler®
DRIVER
DRIVER
SR1 SR2
CS1
ACSNS
CS2– CS2+ PGND
VS1 GATE VS2
VS3+
OUTA
OUTB
OUTC
OUTD
OUTAUX
ADP1046A
RES ADD RTD VCORE FLAGIN PSON PGOOD2 PGOOD1 SDA SCL
VS3–
SHAREo
SHAREi
VDD DGND AGND
VDD
MICROCONTROLLER
Figure 1.
Rev. 0
Document Feedback
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
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
Free Datasheet http://www.datasheet4u.com/
1 page  
Data Sheet
Parameter
VS3 HIGH SPEED ADC
Equivalent Sampling
Frequency
Equivalent Resolution
Dynamic Range
VS1 FAST OVP COMPARATOR
Threshold Accuracy
Propagation Delay
VS1 UVP DIGITAL COMPARATOR
VS1 UVP Accuracy
Propagation Delay
AC SENSE COMPARATOR
Input Voltage Threshold
Propagation Delay
ADC Clock Frequency
Input Voltage Range
Usable Input Voltage Range
Sampling Frequency for I2C
Reporting
Sampling Period for
Feedforward
Measurement Accuracy
Leakage Current
CURRENT SENSE 1 (CS1 PIN)
Input Voltage Range
Usable Input Voltage Range
ADC Clock Frequency
Register Update Rate
Current Sense Measurement
Accuracy
Current Sense Measurement
Resolution
CS1 Fast OCP Threshold
CS1 Fast OCP Speed
CS1 Accurate OCP DC Accuracy
CS1 Accurate OCP Speed
Leakage Current
Symbol Test Conditions/Comments
fSAMP
fSW = 390.6 kHz
At factory trim of 1.2 V
At other thresholds (0.8 V to 1.6 V)
Does not include debounce time
(Register 0x0A[7] = 1)
VACSNS
Does not include debounce time
(Register 0x0B[3] = 1)
PWM and resonant mode
From ACSNS threshold to SRx rising edge
(resonant mode only)
Equivalent resolution is 11 bits
Factory trimmed at 1.0 V
0% to 100% of usable input voltage range
10% to 90% of usable input voltage range
900 mV to 1.1 V
VIN
Factory trimmed at 0.7 V; tested under dc
input conditions
10% to 50% of usable input voltage range
0% to 100% of usable input voltage range
40% to 60% of usable input voltage range
10% to 90% of usable input voltage range
Min
−2.06
−2.0
0.4
0
0
−5.0
−2.0
−1.0
−16
0
0
−3.0
−41.4
−6.0
−84
−1.0
1.184
−2.0
−28
Typ
fSW
6
±30
1
40
80
0.45
160
1.56
1
100
10
1
1.56
10
12
1.2
80
2.62
ADP1046A
Max
1.60
+2.06
Unit
kHz
Bits
mV
%
%
ns
+2.0 % FSR
µs
0.5 V
ns
MHz
1.6 V
1.4 V
Hz
µs
+3.0 % FSR
+2.0 % FSR
+1.0 % FSR
+16 mV
1.0 µA
1.4 V
1.3 V
MHz
ms
+3.0
+41.4
+3.0
+42
+1.0
1.216
100
+2.0
+28
5.24
1.0
% FSR
mV
% FSR
mV
% FSR
Bits
V
ns
% FSR
mV
ms
μA
Rev. 0 | Page 5 of 88
Free Datasheet http://www.datasheet4u.com/
5 Page 
Data Sheet
ADP1046A
Pin No.
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Mnemonic
OUTD
OUTAUX
GATE
SCL
SDA
PSON
FLAGIN
PGOOD2
PGOOD1
SHAREo
SHAREi
DGND
VCORE
VDD
RTD
ADD
RES
VS3−
VS3+
EP
Description
PWM Output for Primary Side Switch. This signal is referenced to AGND. This pin can be disabled when not in use.
Auxiliary PWM Output. This signal is referenced to AGND. This pin can be disabled when not in use.
OrFET Gate Drive Output. This signal is referenced to AGND. If this pin is not used, leave it floating.
I2C Serial Clock Input. This signal is referenced to AGND.
I2C Serial Data Input and Output (Open Drain). This signal is referenced to AGND.
Power Supply On Input. This signal is referenced to AGND. This pin is the hardware PSON control signal. It is
recommended that a 1 nF capacitor be connected from the PSON pin to AGND for noise debouncing and
decoupling.
Flag Input. An external signal can be input at this pin to generate a flag condition.
Power-Good Output (Open Drain). This signal is referenced to AGND. This pin is controlled by the PGOOD2 flag.
This pin is set by a programmable combination of internal flags. If this pin is not used, connect it to AGND.
Power-Good Output (Open Drain). This signal is referenced to AGND. This pin is controlled by the PGOOD1 flag.
This pin is set by a programmable combination of internal flags. If this pin is not used, connect it to AGND.
Share Bus Output Voltage Pin. Connect this pin to 3.3 V through a pull-up resistor (typically 2.2 kΩ). When
configured for a digital share bus, this pin is a digital output. This signal is referenced to AGND. If this pin is
not used, connect it to AGND.
Share Bus Feedback Pin. Connect this pin to the SHAREo pin. This signal is referenced to AGND. If this pin is not
used, connect it to AGND.
Digital Ground. This pin is the ground reference for the digital circuitry of the ADP1046A. Star connect to AGND.
Output of the 2.5 V Regulator. Connect a decoupling capacitor of at least 330 nF (1 µF maximum) from this pin
to DGND as close to the IC as possible to minimize PCB trace length. It is recommended that the VCORE pin not
be used as a reference or to generate other logic levels using resistive dividers.
Positive Supply Input. This signal is referenced to AGND. Connect a 4.7 µF decoupling capacitor from this pin to
AGND as close to the IC as possible to minimize PCB trace length.
Thermistor Input. Place a thermistor (100 kΩ, 1%; beta = 4250, 1%) in parallel with a 16.5 kΩ, 1% resistor. This
pin is referenced to AGND. If this pin is not used, connect it to AGND.
Address Select Input. This pin is used to program the I2C address. Connect a resistor from ADD to AGND. This
signal is referenced to AGND.
Resistor Input. This pin sets up the internal voltage reference for the ADP1046A. Connect a 10 kΩ, ±0.1% resistor
from RES to AGND. This signal is referenced to AGND.
Inverting Remote Voltage Sense Input. There should be a low ohmic connection to AGND. The resistor divider
on this input must have a tolerance specification of 0.5% or better to allow for trimming. Connect a 0.1 µF
capacitor from VS3− to AGND.
Noninverting Remote Voltage Sense Input. This signal is referenced to VS3−, and the nominal input voltage at
this pin is 1 V. The resistor divider on this input must have a tolerance specification of 0.5% or better to allow for
trimming. This pin is the input to the high frequency Δ-Σ ADC.
Exposed Pad. The ADP1046A has an exposed thermal pad on the underside of the package. For increased
reliability of the solder joints and maximum thermal capability, it is recommended that the pad be soldered
to the PCB AGND plane.
Rev. 0 | Page 11 of 88
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
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