Computing & Communications SBU - AC-DC APPLICATIONS GROUP
222 Kansas Street, EL Segundo 90245 CALIFORNIA, USA
IRAC1150-300W Demo Board
User’s Guide
Rev 3.0
8/2/2005
Rev 3.0
8/2/2005
International Rectifier
Page 1 of 18
Table of Contents
1
1.1
2
2.1
2.2
2.3
2.4
2.5
2.6
3
3.1
3.2
3.3
3.4
4
4.1
4.2
4.3
4.4
4.5
5
INTRODUCTION........................................................................................................................3
Features .................................................................................................................................3
DESCRIPTION...........................................................................................................................4
Demo Board Specifications ....................................................................................................4
Schematic...............................................................................................................................5
Demo Board Component Layout ............................................................................................6
Demo Board Picture ...............................................................................................................6
Demo Board PCB Layout .......................................................................................................7
Demo Board Bill of Material ....................................................................................................8
DEMO BOARD OPERATING PROCEDURE.............................................................................9
Load Connection ....................................................................................................................9
AC Input..................................................................................................................................9
DC Power Supply Voltage ......................................................................................................9
Power-up Sequence .............................................................................................................10
PERFORMANCE CHARACTERIZATION DATA .....................................................................11
AC Line Voltage and Current Waveforms.............................................................................11
Output Voltage at AC Line Start Up ......................................................................................12
100% Load Step ...................................................................................................................14
Power Factor ........................................................................................................................16
EMI .......................................................................................................................................17
Demo Board Warnings and Operating Restrictions..................................................................18
Table of Figures
Figure 1 - Demo Board Schematic Diagram .........................................................................................5
Figure 2 - Demo Board Component Placement ....................................................................................6
Figure 3 - Demo Board Photo ...............................................................................................................6
Figure 4 - Demo Board Top Layer Copper............................................................................................7
Figure 5 - Demo Board Bottom Layer Copper.......................................................................................7
Figure 6 - VCC connector and test points .............................................................................................9
Figure 7 - Recommended Demo Board Test Setup ............................................................................10
Figure 8 - Power Factor vs. Line/Load ................................................................................................16
Figure 9 - EMI Plot 115VAC @ 300W Load........................................................................................17
Rev 3.0
8/2/2005
International Rectifier
Page 2 of 18
1 INTRODUCTION
This document details the IRAC1150-300W Demo Board featuring the IR1150S Power Factor
Correction control IC. The document includes a description of the application in addition to
schematics, PCB layout, bill of material, design process, and test setup and results.
The IRAC1150-300W Demo Board is designed to demonstrate the performance of the IR1150S
control IC in a 300W continuous conduction mode boost converter for power factor correction.
The board is designed for universal AC input and 387VDC output.
There are high voltages present whenever the board is energized and proper precautions
should be taken to avoid potential shock and personal injury.
1.1 Features
•
•
•
•
•
•
•
•
•
•
•
•
•
IEC1000-3-2 (EN61000-3-2) Compliant, Low Harmonic Distortion
Universal Input Voltage
Regulated 387VDC ±2.5% Output Voltage
Current Loop Controlled Power Limiting
Brownout Protection
Over voltage Protection
Open Feedback loop Protection
100kHz ±11% Switching Frequency, (User Programmable from 50kHz to 200kHz)
High Efficiency IRFP27N60K Power Switch
Hyper Fast Recovery IR 8ETX06 Boost Diode
Full Load Start Up
No Minimum Load Requirements
Sleep Mode Enable for Low Standby Current Requirement, (Blue Angel, etc.)
Rev 3.0
8/2/2005
International Rectifier
Page 3 of 18
2 DESCRIPTION
The IR1150S is designed for use in continuous conduction mode boost converter applications for
power factor correction and harmonic current reduction. The controller allows for near unity power
factor and exceeds all requirements of IEC1000-3-2 (EN61000-3-2) for harmonic distortion.
The IC utilizes trailing edge modulation and peak current mode control to force the input current to
follow the sinusoidal input voltage in both shape and phase. The IC incorporates numerous protection
features for robust operation and provides a high performance solution while minimizing external
components, design time, and printed circuit board real estate, all in an 8 pin SOIC package.
The IR1150S provides a cost effective solution for lower power designs, which are typically
dominated by discontinuous mode solutions, as well as high power designs typical of the 16 pin
solutions requiring more external components and valuable PCB space.
2.1 Demo Board Specifications
AC Line Voltage Range………………………………………………………….….90 – 264VAC
AC Line Frequency Range……………………………………………………….…….47 – 63Hz
Converter Switching Frequency…………………………………………….….….100kHz ±11%
Output Voltage……………………………………………………………………..387VDC
±2.5%
Maximum Output Power………………………………………………………………….…..300W
Minimum Load Requirement…………………………………………………………………None
OVP Threshold (Max)………..……………………………………………….…………..418VDC
Efficiency (@ 90VAC / 300W)……………………………………………………,,,,,………..92%
Power Factor (@115VAC / 300W)……………………………………………,,,,,,.………..0.999
Operating Ambient Temp Range………………………………………..………….…….0 - 40°C
Note: A fan is recommended whenever operating at maximum output power
Rev 3.0
8/2/2005
International Rectifier
Page 4 of 18
2.2 Schematic
AC-IN1
+
J1
AC-IN2
2
1
4
L1
2.2 mHy
-
3
1
2
CONN
2
2
3
C1
0.47UF, 250V
R1
470k, 1W
1
F1
5A
CONN
C2
0.47UF, 250V
H/K
C3
0.33UF, 630V
Vcc
1
2
J3
4
1
RT1
THERMISTOR 2
1
2
Rev 3.0
D2
IR8EWSO8S
RECT AC
L2
R22
390, 1W
C17
56pF
2
1
Vout
J2
D3
8ETX06
1
2
CONN
JP1
JUMPER1
+
RTN
C14
330UF, 450V
500UHY
D1
BRIDGE
8/2/2005
t
2
R11
499k
1
R13
499k
C13
1 0.33UF, 630V
2
R21
470k, 1W
1
2
2
2
R12
499k
D7
D1N4148
GATE
U1
1
2
3
4
2
R4
100
2
R6
60.4k
1
R5
0.10, 3W
2
1
C8
1000pF
C15
Not Used
1
COM GATE
FREQ VCC
ISNS
VFB
OVP COMP
IR1150S
8
7
6
5
2
1
C10
22UF, 25V
+
VFB
COMP
1
2
C9
1.0UF
D8
10BQ040
C11
0.33UF
C12
0.01UF
1
C16
Not Used
R8
1.0k
2
R10
10K
R15
18.4k
1
R20
18.2k
2
2
R7
6.2
1
2
R9
2.7
1
Q1
IRFP27N60K
1
R14
499k
1
ISNS
FREQ
OVP
Vcc RTN
COM
Figure 1 - Demo Board Schematic Diagram
International Rectifier
Page 5 of 18
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