IRF IRAUDPS3 Class-d audio amplifier Datasheet

Energy Saving Products
101 N.Sepulveda Blvd, EL Segundo 90245 California, USA
IRAUDPS3-30V
+/-30V Power Supply for
Class-D Audio Amplifier
Reference Design
User Guide
Rev. 1.2
6/23/2015
International Rectifier
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
Table of Contents
1
INTRODUCTION ........................................................................................................................ 3
2
IRS27951/2 DESCRIPTION ....................................................................................................... 3
3
EVALUATION BOARD SPECIFICATIONS ................................................................................ 4
3.1
Board Description ................................................................................................................... 5
3.2
Schematic ............................................................................................................................... 6
3.3
Board PCB Layout .................................................................................................................. 7
3.4
Bill of Materials ....................................................................................................................... 8
4
EVALUATION BOARD OPERATING PROCEDURE ............................................................... 10
4.1
Load Connection .................................................................................................................. 11
4.2
AC Input ................................................................................................................................ 11
4.3
IRS27952 DC Supply Voltage .............................................................................................. 11
4.4
Disconnect the Board ........................................................................................................... 11
5
SYSTEM PERFORMANCE CHARACTERIZATION ................................................................ 12
5.1
Primary Waveforms .............................................................................................................. 12
5.2
Dynamic Load Response and Regulation Waveforms.......................................................... 13
Test Conditions: Full Load (2A to +B and -B); No Load (0A) ......................................................... 13
5.3
Output Waveforms with Audio Amplifier Load ...................................................................... 14
5.4
Output Ripple ........................................................................................................................ 18
5.5
Efficiency .............................................................................................................................. 18
5.6
Thermal Data ........................................................................................................................ 19
6
Transformer Spec..................................................................................................................... 20
6.1
Electrical Diagram................................................................................................................. 20
6.2
Resonant Transformer Winding Characteristics ................................................................... 20
Rev. 1.2
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
1 INTRODUCTION
This document details the performance and test procedure of IRAUDPS3-30V Reference Design,
featuring the IRS27952S Resonant Half Bridge controller. The document includes schematic diagram,
PCB layout, test setup, test procedure, and test results.
2 IRS27951/2 DESCRIPTION
The IRS2795(1,2) is an 8 pin, high-voltage, double-ended controller specific for the resonant half-bridge
topology. It provides 50% complementary duty cycle; the high-side and the low-side devices are driven 180°
out-of-phase for exactly the same time. The IC incorporates additional protection features for robust operation
and provides a high performance solution while minimizing external components and printed circuit board area.
The IC enables the designer to externally program all the following features using a 2 pin oscillator - operating
frequency range (minimum and maximum frequency), startup frequency, dead time, soft-start time and sleep
mode. Each of these functions are programmed as follows –
The minimum frequency is programmed using RT and CT.
The dead time is programmed using CT.
RSS and CSS program the converter soft-start time.
RSS//RT and CT program the converter start-up frequency.
The converter maximum frequency is set by (Rmax//RT) and CT.
Sleep mode is initiated by pulling the CT/SD to COM.
At start-up, to prevent uncontrolled inrush current, the switching frequency starts from a programmable
maximum value and progressively decays until it reaches the steady-state value determined by the control
loop. This frequency shift is nonlinear to minimize output voltage overshoot and its duration is programmable
as well. Output voltage regulation is obtained by modulating the operating frequency. An externally
programmable dead time is inserted between the turn-OFF of one switch and the turn-ON of the other one
allows device zero-voltage turn-on transitions.
IRS2795 uses IR’s proprietary high-voltage technology to implement a VS sensing circuitry that monitors the
current through the low-side half bridge MOSFET for short circuit faults. By using the RDSON of the low-side
MOSFET, the IRS2795 eliminates the need for an additional current sensing resistor, filter and current-sensing
pin. This protection feature is latched and the thresholds are fixed at 2V for IRS27951 and 3V for IRS27952.
Finally, the controller IC also features a micro power startup current (ICC<100µA) and a user initiated sleep
mode during which the IC power consumption is less than 200µA (@ Vcc=15V). The sleep mode function
allows system designs with reduced standby power consumption and can be used to meet stringent energy
standards from Blue Angel, Energy Star etc.
Rev. 1.2
6/23/2015
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
3 EVALUATION BOARD1 SPECIFICATIONS
AC Voltage Range
88V-132V or 176V-264V
With user selectable 110/220V jumper
The jumper is configured for 110Vac input in default
AC Line Frequency
47-63Hz
Output Voltage
+/-30V, 28V~32V regulation under 120W load.
+15%/-25%, 22.5V~34.5V under maximum pulsed load
Average Load
60W, PS will be designed to thermally support this load
5 Minutes Cont. Load
120W, PS will be designed to electrically support this load
Maximum Pulse Load
200W, 20Hz sinusoid pulse, at Nominal Vin and +20% Vin
150W, 20Hz sinusoid pulse, at -20% Vin (Note2)
This load has to be managed by the output capacitors
Efficiency
>88% at 120W load
Converter Switching
Frequency Range
60-190 kHz
Maximum Ambient
Operating Temperature
50C
Board Size
3”x5”x1.5”
Main board: Single layer PCB
Control board: Double layer PCB
There are high voltages present whenever the board is energized and proper precautions
should be taken to avoid potential shock and personal injury.
1
Please note that EMI measurements have not been performed on this evaluation board. The primary goal of this board is to demonstrate the
performance of the IRS27952 controller IC.
2
The LLC resonant half-bridge has narrow line regulation range. At low line the capability of peak power is folded back.
Rev. 1.2
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
3.1 Board Description
The evaluation board consists of a front-end AC-DC rectifier stage cascaded with a half-bridge resonant DCDC converter with +/-30V output voltage rails.
The front end is a conventional pi type EMI filter, followed by bridge rectifier stage. Two 200V/680uF bulk
capacitors are connected in series to provide stable DC bus voltage. The rectifier can be configured as full
bridge rectifier for 220Vac input, or voltage doubler rectifier for 110Vac input.
The downstream converter is a multi-resonant half bridge LLC converter whose control is implemented with the
IRS27952 controller HVIC (U101 on the control board). The controller drives the two half-bridge MOSFETs
with a 50 percent fixed duty cycle with pre-defined dead-time. Output voltage regulation is achieved by
changing the switching frequency according to the feedback signal.
IRS27952 is self-supplied in this reference design. The startup resistors R7 and R7A~C provide startup current
to IRS27952 during power up and charge the Vcc capacitors (CP3 and C5 on the main board). Once Vcc
voltage exceeds Vccuv+ threshold, IRS27952 starts operation and the auxiliary winding of power transformer
can provide bias to the IC. The voltage of auxiliary winding could vary a lot when load changes from 0A to full
load, so a linear regulator – Z101, R101 and Q101 (on the control board) – is used to keep Vcc regulated at
12V.
The transformer uses the magnetic integration approach, incorporating the resonant series and shunt
inductances in the power transformer. The transformer configuration chosen for the secondary winding is
center-tap. The feedback loop is implemented by means of a classical configuration using a TL431 (U104) to
adjust the current in the optocoupler PC817 (U103). The optocoupler transistor modulates the current from the
RT pin of the controller IC to modulate the switching frequency, thus achieving output voltage regulation.
The secondary side has two center-tapped windings for +30V and -30V output. Each rail has full wave rectifier
and filter with the return connected to center-tap. The feedback loop is configured to regulate the rail to rail
voltage to 60V. The balance of +30V and -30V is achieved by the symmetric windings of transformer.
Rev. 1.2
6/23/2015
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3.2 Schematic
Figure 1 – Main Board Schematic
Figure 2 – Control Board Schematic
Rev. 1.2
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3.3 Board PCB Layout
Figure 3 – Main Board Layout (Single layer PCB)
Figure 4 – Control Board Layout (double layer PCB)
Rev. 1.2
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3.4 Bill of Materials
Qty.
Value
Description
Designator
Digikey P/N
Vendor
3
N/C
2
(open) MUR1620CTG
(OPEN)
CR1, CR2
(open)
ON Semiconductor
1
2P AC Receptacle RA
2P AC Receptacle RA
AC2
Q273-ND
Qualtek
1
0.022uF/250V
CAP .022UF 630V METAL POLYPRO
C9
495-1329-ND
EPCOS Inc
1
0.1uF/50V
CAP .10UF 50V CERAMIC X7R 0805
C5
399-1169-1-ND
Kemet
1
0.1uF/305VAC
CAP .10UF 305VAC EMI
SUPPRESSION
C4
495-2319-ND
EPCOS Inc
1
0.1uF/400V
CAP .10UF 400V METAL POLY
C7
495-2444-ND
EPCOS Inc
2
0.1uF/100V
C11, C14
399-1805-1-ND
Kemet
1
0.47uF/305V
CAP .1UF 100V CER X7R SMT 1206
CAP .47UF 305VAC EMI
SUPPRESSION
C3
495-2322-ND
EPCOS Inc
1
100uF/25V
CAP 100UF 25V ELECT VZ RADIAL
CP3
493-1301-ND
Nichicon
2
680uF/200V
CAP 680UF 200V ELECT SMQ SNAP
CP1, CP2
565-2733-ND
United Chemi-Con
2
4700uF/50V
CAPACITOR 4700UF 50V ELECT
TSUP
CP6, CP7
P6931-ND
2
1uF/100V
CAP CER 1UF 100V X7R 1206
C18, C19
490-3909-1-ND
Panasonic - ECG
Murata Electronics North
America
1
2.2nF
CAP CER 2200PF 250VAC X1Y1 RAD
C10
445-2411-ND
TDK
2
0.01uF
CAP CERM .01UF 10% 50V X7R 0805
C20, C21
478-1383-1-ND
AVX Corporation
1
CONN BLOCK TERM
PCB 5.08MM 6POS
CONN BLOCK TERM PCB 5.08MM
6POS
CNN2
281-1438-ND
Weidmuller
1
CONN HEADER 2POS
.100
CONN HEADER 2POS .100 VERT TIN
SW1
WM6602-ND
Molex Connector
Corporation
1
3 pin header o.100"
pitch
CONN HEADER 3POS .100 VERT TIN
HDR1
WM6603-ND
Molex Connector
Corporation
2
STTH1002CB
DIODE FAST 200V 10A D-PAK
CR3, CR4
497-3536-5-ND
STMicroelectronics
2
ES1D
DIODE ULTRA FAST 1A 200V SMA
D3, D4
ES1D-E3/61TGICTND
Vishay/General
Semiconductor
1
24V
DIODE ZENER 200MW 24V SOD323
DZ1
MMXZ5252BTPMSCT-ND
Micro Commercial Co
1
Transformer
019-7340-01R
T1
1
Mini Fuse 4A
FUSE 4A 250V 8.5X8.5 TIME-LAG
Fuse
486-1474-ND
Schurter Inc
1
Pico fuse holder
FUSEHOLDER FOR SUB-MINI LINK
PCB
F1
486-1244-ND
Schurter Inc
2
5.2uH/5.5A
INDUCTOR POWER SHIELD 5.2UH
SMD
L4, L6
513-1396-1-ND
Cooper Bussmann, Copper
Bussmann
1
Jumper
IRS2795 Control
Module
Jumper
Lr
IRS2795 Control Module
CN1, CN2
IRS2795
IR-XIAN, IR_XIAN
LED2A
LED 470NM
ROUND BLUE 3MM
TT Electronics
PLK1076-ND
Panasonic - ECG
IPA50R250CP -ND
FDPF18N50T-ND
Infineon /
Fairchild
2
C8, D1, D2
1
Blue LED
LED 470NM ROUND BLUE 3MM
1
1mH/2.2A
LINE FILTER 1.0MH 2.2A N SERIES
L1
4
Screw M3
MH-130
MH1, MH2,
MH3, MH4
2
IPA50R250CP or
FDPF18N50
MOSFET N-CH 550V 13A TO-220F or
MOSFET N-CH 500V 18A TO-220F
FET1, FET2
Rev. 1.2
6/23/2015
International Rectifier
Precision
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to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
1
GBU4J-BP
RECT BRIDGE GPP 4A 600V GBU0
BR1
GBU4J-BPMS-ND
Micro Commercial Co
1
0R
RES 0 OHM 1/8W 0805 SMD
R14
RHM0.0ARCT-ND
Rohm Semiconductor
2
2.2k
RES 2.2K OHM 1W 5% 2512 SMD
R12, R13
PT2.2KXCT-ND
Panasonic - ECG
2
4.7k
RES 4.7K OHM 1/4W 5% 1206 SMD
R5, R6
RHM4.7KERCT-ND
Rohm Semiconductor
1
27
RES 27 OHM 1/4W 5% 1206 SMD
R11
311-27ERCT-ND
Yageo
1
47k
RES 47K OHM 1/4W 5% 1206 SMD
RHM47KERCT-ND
Rohm
8
100k
RES 100K OHM 1/4W 5% 1206 SMD
R8
R3, R3A,
R4, R4A,
R7, R7A,
R7B, R7C
RHM100KERCT-ND
Rohm Semiconductor
2
220k
RES 220K OHM 1/4W 5% 1206 SMD
R1, R2
311-220KERCT-ND
2
Shorting Jumper
J1, J2
WM23944-ND
1
5 ohms
Shorting Jumper 2P_HDR_.100
TINRUSH CURRNT LMTR 5.0 OHM
RADIAL
Yageo
Molex Connector
Corporation
TH1
495-2096-ND
EPCOS Inc
BOM of Main Board
Qty.
Value
Description
Designator
Digikey P/N
1
2.2uF
CAP CER 2.2UF 50V X7R 1206
C101
490-3367-1-ND
Vendor
Murata Electronics North
America
1
100nF
CAP .10UF 50V CERAMIC X7R 0805
C102
399-1169-1-ND
Kemet
1
100nF
CAP .10UF 50V CERAMIC X7R 1206
C103
399-1248-1-ND
Kemet
1
510pF
CAP CER 510PF 50V 5% C0G 0603
C104
490-1444-1-ND
Kemet
1
4.7uF/16V
CAP TANTALUM 4.7UF 16V 20%
SMD
C105
495-2233-1-ND
1
100nF
CAP CER .1UF 50V 10% X7R 0603
C106
490-1519-1-ND
Kemet
Murata Electronics North
America
1
1nF
CAP 1000PF 50V CERAMICX7R 0603
399-1082-1-ND
2
HDR 6P
CONN HEADER 6POS .100 R/A TIN
C107
CN101,
CN104
1
US1G
DIODE ULTRA FAST 1A 400V SMA
D101
2
SDM100K30L-7
1
1N4148WT-7
DIODE SCHOTTKY 30V 1.0A SOD323
DIODE SWITCH 100V 150MW SOD523
1
N/C
1
3 pin header o.100"
pitch
CONN HEADER 3POS .100 VERT TIN
1
Blue
WM6006-ND
Kemet
Molex Connector
Corporation
Vishay/General
Semiconductor
D102, D104
US1G-E3/61TGICTND
SDM100K30LDICTND
D103
1N4148WTDICT-ND
Diodes Inc
HDR101
WM6603-ND
Molex Connector
Corporation
LED 468NM BLUE CLEAR 0805 SMD
LED101
160-1645-1-ND
Lite-On Inc
100k
POT 1.0K OHM 3MM CERM SQ TOP
SMD
P101
ST32ETB104CT-ND
Copal Electronics Inc
1
1k
POT 1.0K OHM 3MM CERM SQ TOP
SMD
P102
ST32ETB102CT-ND
Copal Electronics Inc
1
PBSS4350X
TRANS NPN 50V 3A SOT89
Q101
568-4159-1-ND
NXP Semiconductors
1
10k
RES 10K OHM 1/10W 5% 0603 SMD
R101
311-10KGRCT-ND
Yageo
2
10
RES 10 OHM 1/8W 5% 0805 SMD
R103, R110
P10ACT-ND
Panasonic - ECG
2
22
RES 22 OHM 1/8W 5% 0805 SMD
R104, R109
P22ACT-ND
Panasonic - ECG
1
16k
RES 16.0K OHM 1/10W 1% 0603 SMD
R105
P16.0KHCT-ND
Panasonic ECG
1
Rev. 1.2
Diodes Inc
D105
6/23/2015
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
3
6.2k
RES 6.20K OHM 1/10W 1% 0603 SMD
3
N/C
1
2.7k
RES 2.7K OHM 1/10W 5% 0603 SMD
1
10k
RES 10K OHM 1/4W 5% 1206 SMD
R106, R108,
R111
R107, R115,
R118
P6.20KHCT-ND
Panasonic ECG
R112
311-2.7KGRCT-ND
Yageo
R113
RHM10KERCT-ND
Rohm Semiconductor
1
4.7k
RES 4.7K OHM 1/10W 5% 0603 SMD
R114
311-4.7KGRCT-ND
Yageo
1
27k
RES 27.0K OHM 1/10W 1% 0603 SMD
R116
311-27.0KHRCT-ND
Yageo
1
47k
RES 47.0K OHM 1/10W 1% 0603 SMD
R117
311-47.0KHRCT-ND
Yageo
1
1.2k
RES 1.20K OHM 1/10W 1% 0603 SMD
R119
311-1.20KHRCT-ND
Yageo
1
IRS27952
IC DRIVER HALF BRIDGE OSC
8SOIC
U101
IRS27952SPBF-ND
International Rectifier
(Infineon Technologies)
2
PC817
PHOTOCOUPLER LO IF TRAN 4SMD
U102, U103
425-1461-1-ND
Sharp Microelectronics
1
TL431
IC PREC SHUNT REG ADJ SOT23-3
U104
NXP Semicondoctor
1
12V
DIODE ZENER 200MW 12V SOD323
Z101
568-4883-1-ND
MM3Z12VT1GOSCTND
ON Semiconductor
Z102
BZT52C12-FDICTND
Diodes Inc
1
12V
DIODE ZENER 500MW 12V SOD123
BOM of the Control Board
4 EVALUATION BOARD OPERATING PROCEDURE
Variable
AC
Source
(Variac or
Electronic)
CAUTION: Potentially lethal voltages exist on this demo board when powered up. Improper
or unsafe handling of this board may result in serious injury or death.
ISOLATION
TRANSFORMER
+30V
COM
COM
-30V
Figure 5 - Recommended Evaluation Board Test Setup
Rev. 1.2
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4.1 Load Connection
Connect electronic loads or class-D audio amplifier board (such as IRAUDAMP5) to connector CNN2. +30V is
marked as +B on the board, and -30V is marked as –B.
4.2 AC Input
The PSU is designed to work under narrow AC input range. On the main board there is a jumper to select AC
line voltage. If the jumper is shorted, the board works at 110Vac +/-20%. If the jumper is open, the board works
at 220Vac +/-20%.
The AC voltage select jumper HDR1 locates between the input bridge rectifier BR1 and Bus capacitor C8. The
default connection is for 110V AC input (HDR1 jumper is shorted).
An isolation transformer on the AC side is highly recommended, so that all the control signals on the board can
easily be probed by using regular scope probes.
The NTC resistor limits the inrush current upon initial application of full AC line voltage. Once power is applied
to demo board, potentially lethal high voltages will be present on board and necessary precautions should be
taken to avoid serious injury.
4.3 IRS27952 DC Supply Voltage
The board is self-supplied by startup circuit and auxiliary winding of transformer. The startup circuit starts to
work once AC or DC input voltage applies to the board.
4.4 Disconnect the Board
It is recommended to discharge the bulk capacitor CP1 and CP2 every time after evaluation is finished:
- Disconnect the high voltage AC source from AC2
- Apply an external 12V DC voltage to control board for a while until bus voltage drops to 0V. Connect
12V to Vcc (pin 5 of CN1) and COM to pin 1 of CN1.
1
2
3
4
5
6
COM LO VS HO Vcc COM
Rev. 1.2
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5 SYSTEM PERFORMANCE CHARACTERIZATION
5.1 Primary Waveforms
Test Conditions: Full Load (2A to +B and -B); No Load (0A)
Ch 1: Low-side device VGS – Ch3 : Voltage at VS pin
Ch 4: Resonant tank current
Rev. 1.2
88Vac Input, Full Load Operation
88Vac Input, No Load Operation
132Vac input, Full Load Operation
132Vac Input, No Load Operation
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Ch 2: +30V Output Voltage Ch 4: Resonant tank current
+B
+B
110Vac, 120W load startup
110Vac, no load startup
The switching frequency sweeps from 180khz to regulation frequency in 20ms~30ms, prevents high current
spike during startup. The output voltage has no overshoot during startup.
5.2 Dynamic Load Response and Regulation Waveforms
Test Conditions: Peak Load (8A to +B and -B); No Load (0A)
Ch 1: +B output – Ch 2: -B output
Ch 4: Output current
110Vac, 8A dynamic load to each rail
8A peak current, 20Hz, 50% duty-cycle
Rev. 1.2
6/23/2015
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5.3 Output Waveforms with Audio Amplifier Load
5.3.1. 110Vac input, 1kHz, 10% clipping
Ch1: +B, Ch2: -B, Ch3: output current on the GND return
Output voltage regulated at +29V/-31V. Power supply output power 250W.
Output power 125W/ch at 1khz, 10% clipping.
Rev. 1.2
6/23/2015
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5.3.2 110Vac input, 20Hz, 10% clipping
Ch1: +B, Ch2: -B, Ch3: output current on the GND return
At 20hz, 10% clipping, +B varies from 31.2V to 23.7V, ripple 7.5V; –B varies from -32.2V to -23.2V,
ripple 9V. Power supply output power 200W.
Output power 100W/ch at 20hz, 10% clipping.
Rev. 1.2
6/23/2015
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to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
5.3.3 132Vac input, 20Hz, 10% clipping
Ch1: +B, Ch2: -B, Ch3: output current on the GND return
At 20hz, 10% clipping, +B varies from 32.5V to 25.6V, ripple 6.9V; –B varies from -34.9V to -28.3V,
ripple 6.6V. Power supply output power is 220W.
Output power 110W/ch at 20hz, 10% clipping.
Rev. 1.2
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5.3.4 88Vac input, 20Hz, 10% clipping
Ch1: +B, Ch2: -B, Ch3: output current on the GND return
At 20hz, 10% clipping, +B varies from 30.4V to 20.11V, ripple 10.3V; –B varies from -31.1 V to -19.5V,
ripple 11.6V. Power supply output power is 150W.
Output power 75W/ch at 20hz, 10% clipping.
Rev. 1.2
6/23/2015
International Rectifier
Page 17 of 20
PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
5.4 Output Ripple
Both +B and –B output voltage ripple is less than 100mV at 2A load.
5.5 Efficiency
The efficiency was tested with constant load. The result is shown in the table below.
Low line:
Vinac(V)
Iout(A)
88
110
132
Rev. 1.2
6/23/2015
+B
Iout(A)
‐B
Pin (W)
Pout (W)
Efficiency
0
29.93
0
29.99
2.5
0
0
2
29.11
0
30.81
65.7
58.22
88.6%
0
30.37
2
29.55
66.4
59.1
89.0%
2
29.38
2
30.53
134.6
119.82
89.0%
0
29.94
0
30.06
2.51
0
0
2
29.24
0
30.7
65.1
58.48
89.8%
0
30.34
2
29.61
65.8
59.22
90.0%
2
29.55
2
30.4
132.4
119.9
90.6%
0
29.96
0
29.99
2.7
0
0
2
29.16
0
30.8
65.1
58.32
89.6%
0
30.3
2
29.65
66
59.3
89.8%
2
29.58
2
30.37
132
119.9
90.8%
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
High line:
Vinac(V)
Iout(A)
176
220
264
+B
Iout(A)
‐B
Pin (W)
Pout (W)
Efficiency
0
29.935
0
30.07
2.3
0
0
2
29.42
2
30.51
132
119.86
90.8%
0
29.96
0
30.06
2.5
0
0
2
29.56
2
30.39
130
119.9
92.2%
0
29.96
0
30.07
2.7
0
0
2
29.58
2
30.39
130
119.94
92.3%
5.6 Thermal Data
The thermal performance is tested at 110Vac input and 120W load for 5 minutes.
Ambient
Transformer
Bridge
FET1
FET2
IC IRS27952
CR3
CR4
Dummy load R12,R13
Rev. 1.2
6/23/2015
International Rectifier
23
67
76
50
51
49
96
93
71
Page 19 of 20
PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
6 Transformer Spec
Minimum operating frequency: 60 kHz
Minimum operating frequency: 200 kHz
Primary inductance: 600 µH 10% @1 kHz - 0.25V (Note 1)
Leakage inductance: 160 µH 10% @1 kHz - 0.25V (Note 2)
Note: 1 Measured between Pins 4 and 6
Note: 2 Measured between Pins 4 and 6 with secondary windings shorted
6.1 Electrical Diagram
Schematic
11
1
P3, P4
P3
S1
2
Secondary
windings
S1,S2
S3, S4
Primary
winding
(P1, P2)
3
Transformer cross section view
winding's sequencing
12
11
10
1
2
3
9
8
7
4
5
6
Bottom
View
10
P4
S2
P1
S3
12
8
4
7
5
NC
P2
6
S4
9
IRAUDPS3 transformer
e
6.2 Resonant Transformer Winding Characteristics
Rev. 1.2
6/23/2015
Winding
Pins
Turn number
RMS Current
P1&P2
4-6
58
1.5A
P3
1 -2
4
0.1A
P4
2 -3
4
0.1A
S1
11 - 10
10
1.6A
S2
10 – 12
10
1.6A
S3
8-7
10
1.6A
S4
7- 9
10
1.6A
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PROPRIETARY INFORMATION - This document and the information contained therein are proprietary and are not to be reproduced, used or disclosed
to others for manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER.
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