Datasheet ADP1047 Datasheet (ANALOG DEVICES)

Digital Power Factor Correction Controller

Preliminary Technical Data

FEATURES

Flexible, single phase, digital power factor correction (PFC)

controller True rms ac power metering Enhanced dynamic response Optimized light load efficiency performance

Output voltage adjustment

Frequency reduction Inrush control Switching frequency spread spectrum for improved EMI External frequency synchronization PMBus compliant

Programmable ac line fault detection and protection

Programmable output fault detection and protection Extensive fault protection for high reliability systems Frequency range from 30 kHz to 400 kHz 8 kB EEPROM Programming via easy-to-use graphical user interface (GUI)

APPLICATIONS

AC/DC power supplies for applications including

Computing server and storage

Network and communication infrastructure

Industrial and medical

GENERAL DESCRIPTION

The ADP1047 is a digital power factor correction controller providing accurate input power metering capability and inrush control targeting ac/dc systems.

The digital PFC function is based on a conventional boost PFC with multiplication of the output voltage feedback combined with the input current and voltage to provide optimum harmonic correction and power factor for ac/dc systems. All signals are converted into the digital domain to provide maximum

With Accurate AC Power Metering

ADP1047

flexibility—all key parameters can be reported and adjusted via the PMBus interface. This allows users to optimize system performance, maximize efficiency across the load range, and reduce design time to market.

The ADP1047 provides accurate, rms measurement of input voltage, current and power. This information can be reported to the secondary of the power supply via the PMBus interface.

The combination of a flexible, digitally controlled PFC engine and accurate input power metering facilitate the adoption of intelligent power management systems capable of making decisions to improve end user system efficiency. The device targets further efficiency improvements through programmable frequency reduction at light load and the capability to reduce the output voltage at low loads.

The ADP1047 provides enhanced integrated features and functions; the Inrush and soft start control functions provide significant component count reduction with easy design optimization.

The device targets high reliability, redundant power supply applications and has extensive and robust protection circuitry: independent overvoltage protection, overcurrent (ILIM), ground continuity metering, and ac sensing. Internal overtemperature is provided and external temperature can be recorded via an external sensing device.

The internal 8 kB EEPROM stores all the programmed values and allows standalone control without a microcontroller. All parametric reporting and adjustments are programmed via an easy-to-use GUI—no complex programming is required.

The ADP1047 operates from a single 3.3 V supply. The device is available in a 24-lead QSOP package specified over ambient temperature range −40°C to +85°C.

Rev. PrA

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her 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. Trademarks and registered trademarks are the property of their respective owners.

ADP1047 Preliminary Technical Data

FUNCTIONAL BLOCK DIAGRAM

OVP

PGND

DAC

ADP1047

CS- CS+

ILIM

VAC PGND

VFB

INRUSH

PWM

PWM2

VDD

VCORE

RES

UVLO

LDO

PWM

ENGINE

VREF

ADC

CS

OCP

ADC

VAC

DIGITALCORE

8kb EEPROM

I2C

INTERFACE

ADC

VFB

OLP OVP

OSC

PGOOD

AC_OK

SYNC

PSON SCL

SDA

ADD

RTD

Figure 1.

AGND

DGND

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ADP1047 Preliminary Technical Data

SPECIFICATIONS

VDD = 3.3 V TA = -40°C to +85°C, unless otherwise noted.

Table 1.

Parameter Symbol Test Conditions/Comments Min Typ Max Units

POWER SUPPLY

Operating Supply Voltage VDD 3.0 3.3 3.6 V Supply Current IDD Normal operation (PSON high) 17 mA Peak Supply Current I

POWER-ON RESET

POWER ON RESET VDD rising 1.8 2.95 V UVLO VDD falling 2.80 2.85 2.90 V

OVLO 3.7 3.9 4.1 V

VAC PIN LEAKAGE CURRENT μA

OVLO Debouncing (VDD and V

) Programmable 2 500 μs

CORE

VCORE

Output Voltage Temperature = 25°C 2.3 2.5 2.7 V

PWM OUTPUT

Output Voltage

Low V High V

Rise Time C Fall Time C

DUTY CYCLE

Minimum Off Time Programmable 40 1200 ns Minimum On Time Programmable 0 1200 ns

VOLTAGE SENSE INPUT RANGE

VAC

Input Voltage 0 1.6 V

VFB

Input Voltage 0 1.6 V

RTD

Input Voltage 0 1.6 V

SWITCHING FREQUENCY

Frequency Range Programmable (see Table TBD) 30 400 kHz Accuracy −3% +3%

OSCILLATOR, CLOCK AND PLL

Oscillator Frequency 1.51 1.56 1.61 MHz Digital Clock Frequency 200 MHz PLL Frequency 200 MHz

RES

Output Voltage Temperature = 25°C – RES = 50 kΩ 0.98 1.0 1.02 V Temperature Stability 320 ppm/°C

CURRENT SENSE ADC

Input Voltage Range Low Line Programmable 750 mV Input Voltage Range High Line Programmable 500 mV Current Source High Line 10 kΩ level shift resistor, V Current Source Low Line 10 kΩ level shift resistor, V Current Source Accuracy ±0.03 %

PWM

Output Low Level 0.8 V Output High Level 2.0 V

During EEPROM programming (10 ms) 27 37 mA

DD_PK

Sink current = 10 mA 0.4 V

PWMOL

Source current = 10 mA

PWMOH

= 50 pF 3.5 ns

LOAD

= 50 pF 1.5 ns

LOAD

CS+

VDD − 0.4 V

− V

= 0 V 75 μA

CS−

− V

= 0 V 62.5 μA

CS−

V

Rev. PrA | Page 4 of 12

Preliminary Technical Data ADP1047

Parameter Symbol Test Conditions/Comments Min Typ Max Units

PGOOD/AC_OK

Output Low Level 0.8 V

Output High Level 2.0 V

Debounce (High to Low and Low to

High)

FAST OVERCURRENT PROTECTION

Fast OCP Threshold

Positive Signal 1470 1500 1530 mV Negative Signal 490 500 510 mV

Current Source

Positive Signal Programmable in four steps 20 80 A

Negative Signal Programmable in four steps 60 120 A Current Source Accuracy ±3.2 % Propagation Delay From threshold trip to PWM disabled 160 ns Blanking Time Programmable in eight steps 40 800 ns Debouncing Time Programmable in four steps 40 240 ns

RMS OVERCURRENT PROTECTION

RMS OCP Threshold Fully Programmable (0x5B) RMS Accuracy −2 +2 % Propagation Delay AC line frequency is 50 Hz 12 ms

FAST OVERVOLTAGE PROTECTION

OVP Threshold

Rising

Falling

Minimum Step 3.9 mV

Accuracy 4 %

Propagation Delay (Latency) Does not include blanking/debouncing 160 ns Debouncing Time Programmable in four steps 120 680 ns Blanking Time

ACCURATE OVERVOLTAGE PROTECTION

OVP Threshold Fully programmable (0x5B) Accuracy −2 +2 % Propagation Delay AC line frequency is 50 Hz 10 ms

OPEN-LOOP PROTECTION

VFB Error Threshold Propagation Delay 200 ns

Debouncing Time Programmable( shared with fast OVP) 120 680 ns Common Mode −0.2 +1.6 V

SDA/SCL VDD = 3.3 V

Input Voltage

Low 0.8 V

High 2.2 V Output Voltage Low 0.4 V Pull-Up Current 100 350 µA Leakage Current −5 +5 µA

SERIAL BUS TIMING

Clock Frequency 400 kHz Glitch Immunity tSW 50 ns Bus Free Time t Start Setup Time t Start Hold Time t

Programmable 0 600 ms

Fully programmable between 1 V and

1 1.5 V

1.5 V (0xFE2F) with seven bits Fully Programmable between 1 V and

1 1.5 V

1.5 V (0xFE30) with seven bits

Blanking after threshold

10 s

reprogramming

VFB

4.7 µs

BUF

SU;STA

HD;STA

±80 ±100 ±120 mV

4.7 µs 4 µs

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ADP1047 Preliminary Technical Data

Parameter Symbol Test Conditions/Comments Min Typ Max Units

SCL Low Time t SCL High Time t SCL, SDA Rise Time tR 1000 ns SCL, SDA Fall Time tF 300 ns Data Setup Time t Data Hold Time t

EEPROM RELIABILITY

Endurance 10 k cycles Data Retention Temperature = 85°C 10 Years

4.7 μs

LOW

4 μs

HIGH

250 ns

SU;DAT

300 ns

HD;DAT

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Preliminary Technical Data ADP1047

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Supply Voltage (Continuous) VDD 3.8 V Digital core supply voltage VCORE 2.7 V Digital Pins −0.3 V to (VDD + 0.3 V) Analog Pins

AGND to DGND −0.3 V to +0.3 V Operating Temperature Range −40°C to +85°C Storage Temperature Range −65°C to +150°C Maximum Junction Temperature 150°C Peak Solder Reflow Temperature

SnPb Assemblies (10 sec to 30 sec) 240°C

RoHS Compliant Assemblies

(20 sec to 40 sec)

260°C

Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

ESD CAUTION

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ADP1047 Preliminary Technical Data

V

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

AGND

1

VAC

2 3

VFB

4

OVP

PGND

5

ADP1047

6

ILIM

NC

CS-

CS+

DGND PSON CORE

7

(Not to Scal e)

8

9 10 11 12

TOP VIEW

Figure 2. Pin Configuration

Table 3. Pin Function Descriptions

Pin No. Name Description

1 AGND Analog Ground. Connect this pin directly to DGND. This is an analog voltage input to the ADC. 2 VAC Input Line Voltage Sense. This signal is referred to PGND. 3 VFB

Feedback Voltage Sense. This signal is referred to PGND. This is the feedback signal for PFC power circuit regulation.

This pin is used as the analog voltage input to the ADC. 4 OVP Overvoltage Protection. This signal is referred to PGND. This signal is used as redundant OVP protection. 5 PGND

Power Ground. This is the connection for the ground line of the power rail. Place a low impedance path between this

pin and AGND. 6 ILIM Current Limiting. Peak current limiting. This signal is referred to PGND. 7 NC No Connect. Do not connect to this pin. 8 CS− Differential Current Sense Negative Input. This signal is used for current measurement, metering, and protection. 9 CS+ Differential Current Sense Positive Input. This signal is used for current measurement, metering, and protection. 10 DGND Digital Ground. Ensure a low ohmic contact between this pin and AGND. 11 PSON Power Supply Enable Signal. This signal is used to enable/disable the PFC controller. This signal is referred to DGND. 12 VCORE Output of 2.5 V Regulator. Connect a 100 nF capacitor from this point to DGND. 13 PWM Pulse-Width Modulation Output for PFC Regulation. This signal is referred to DGND. 14 PWM2 Auxiliary PWM (ADP1047) or Interleaved PWM Output (ADP1048). This signal is referred to DGND. 15 AC_OK Open Drain Output. User configurable signal from a combination of flags. This signal is referred to DGND. 16 PGOOD Open Drain Output. User configurable signal from a combination of flags. This signal is referred to DGND. 17 INRUSH Inrush Control Signal. This is the inrush control signal to an external inrush driver; open drain referenced to DGND. 18 SYNC

Controller Synchronization. This pin allows paralleled PFC controllers to synchronize to reduce interference. This signal

is referred to DGND. 19 SCL I2C Serial Clock Input. This signal is referred to DGND. 20 SDA I2C Serial Data Input and Output (Open Drain). This signal is referred to DGND. 21 ADD Address Select Input. Connect a resistor from this pin to AGND. 22 RTD Thermistor Input. A thermistor is placed from this pin to AGND. This signal is referred to AGND. 23 RES Internal Voltage Reference. Connect a 50 kΩ resistor from RES to AGND. 24 VDD Positive Supply Input for the IC. Range from 3.0 V to 3.6 V. This signal is referred to AGND.

24 23 22 21 20 19 18 17 16 15 14 13

VDD RES RTD ADD SDA SCL SYNC INRUSH PGOOD AC_OK PWM2 PWM

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Preliminary Technical Data ADP1047

THEORY OF OPERATION

ADP1047 is a PFC controller with AC power metering. In addition to the more conventional features like voltage sense and current sense, the part generates a programmable PWM output for control.

An extensive set of protection is offered that includes overvoltage protection (OVP), overcurrent protection (OCP), undervoltage protection (UVP), ground continuity metering, and ac sensing.

All these features are programmable through the I

2

C bus interface. This bus interface is also used to calibrate the power supply. Other information, such as input voltage, input current, input power, and fault flags are also available through the digital bus interface.

The control loop is implemented in the digital domain allowing easy programming of filter characteristics, which is of great value in customizing and debugging designs.

The built-in EEPROM is used to store programmed values and instructions. Reliability is improved through a built-in checksum and redundancy of critical circuits. In the event of a system fault, the EEPROM can be configured to capture the first instance of failure. This feature can be used to improve overall system reliability and reduce failure mode analysis time.

ADP1047 comes with a free downloadable software GUI, which provides all the necessary software to program it.

The ADP1047 operates from a single 3.3 V supply and is specified from −40°C to +85°C.

Vout

Bulk

Cap

AC Input

VRec

1 2 3 4 5 6 7 8

9 10 11 12

Relay

AGND VAC VFB OVP PGND ILIM

NC

CSCS+

DGND PSON VCORE

SYNC

INRUSH

PGOOD

AC_OK

PWM2

PWM

ADP1047

VDD RES RTD ADD SDA

SCL

3.3V

24 23 22 21 20

PMBus

19 18 17 16 15 14 13

Figure 3. Typical Application Circuit

Rev. PrA | Page 9 of 12

ADP1047 Preliminary Technical Data

OUTLINE DIMENSIONS

0.345 (8.76)

0.341 (8.66)

0.337 (8.55)

0.065 (1.65)

0.049 (1.25)

0.010 (0.25)

0.004 (0.10)

COPLANARITY

0.004 (0.10)

24

1

0.025 (0.64) BSC

CONTROLLING DIMENSIONSARE IN INCHES; MILLIMETERDIMENSIONS (IN PARENTHESES) AREROUNDED-OFF INCH EQUIVALENTS FOR REFERENCE ONLY AND ARE NOTAPPROPRIATE FOR USE IN DESIGN.

0.012 (0.30)

0.008 (0.20)

COMPLIANT TO JEDEC STANDARDS MO-137-AE

13

12

0.158 (4.01)

0.154 (3.91)

0.150 (3.81)

0.069 (1.75)

0.053 (1.35)

SEATING PLANE

0.244 (6.20)

0.236 (5.99)

0.228 (5.79)

8° 0°

0.010 (0.25)

0.006 (0.15)

0.050 (1.27)

0.016 (0.41)

0.020 (0.51)

0.010 (0.25)

0.041 (1.04) REF

01-03-2008-A

Figure 4. 24-Lead Shrink Small Outline Package [QSOP]

(RQ-24)

Dimensions shown in inches

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Preliminary Technical Data ADP1047

NOTES

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ADP1047 Preliminary Technical Data

NOTES

I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors).

Rev. PrA | Page 12 of 12

Datasheet ADP1047 Datasheet (ANALOG DEVICES)

Specifications and Main Features

Frequently Asked Questions

User Manual

FEATURES

APPLICATIONS

GENERAL DESCRIPTION

TABLE OF CONTENTS

FUNCTIONAL BLOCK DIAGRAM

SPECIFICATIONS

ABSOLUTE MAXIMUM RATINGS

ESD CAUTION

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

THEORY OF OPERATION

OUTLINE DIMENSIONS