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Rev. 4.0    5/22/2010 

International Rectifier 

Page 1 of 16 

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.

 

 

 

          

             

 

Energy Saving Products  

101 N.Sepulveda Blvd, EL Segundo 90245  California, USA 

 

 

 

 

 

 

 

 

IRAC27951-220W 

 

IRS27951 Evaluation Board 

User Guide  

  

 

 

Содержание IRAC27951

Страница 1: ...ed 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 Energy...

Страница 2: ...Evaluation Board Picture 6 3 4 Board Component Placement 6 3 5 Board PCB Layout 7 3 6 Bill of Materials 8 4 EVALUATION BOARD OPERATING PROCEDURE 9 4 1 Load Connection 9 4 2 AC DC Input 10 4 3 IRS27951...

Страница 3: ...me 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 i...

Страница 4: ...m converter is a multi resonant half bridge LLC converter whose control is implemented with the IRS27951 U1 controller HVIC The controller drives the two half bridge MOSFETs with a 50 percent fixed du...

Страница 5: ...1uF 275V X2 265VAC N 1 2 JP1 Header 3 1 RT 610uH Dg1 1N4148 Rgs1 DNP D1 V30100S D3 20TQ040 W1 Jumper U3 TL431 DNP Do not Populate L1 t RNTC 5 DNP Do NotP opulate 3 3uH 10A Lf2 C2 0 1uF 275V X2 C3 0 33...

Страница 6: ...erein 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 3 Evaluati...

Страница 7: ...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 writin...

Страница 8: ...160 FDICT ND Dz Zener Diode SMD 1 18V 0 5W DIGIKEY FLZ18VCCT ND F1 FUSE IEC FA LBC 5x20 1 250V 5A DIGIKEY F2395 ND JP1 CONN HEADER 3POS 0 156 VERT TIN 1 DIGIKEY WM4621 ND JP3 CONN HEADER 2POS 0 1 VERT...

Страница 9: ...of this board may result in serious injury or death 4 1 Load Connection Connect a resistive or electronic load capable of 150W continuous power on the 24V rail to connector JP4 and a 75W continuous po...

Страница 10: ...e 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 However the Vcc will be stable...

Страница 11: ...r manufacture or any other purpose except as specifically authorized in writing by INTERNATIONAL RECTIFIER 5 SYSTEM PERFORMANCE CHARACTERIZATION Test Conditions VIN 400V DC Full Load 24V 6A 12V 6A No...

Страница 12: ...ort Circuit Protection IRS27951 uses high voltage technology to sense the current in the low side MOSFET The voltage at the VS node is sensed when the low side device is turned ON and the system shuts...

Страница 13: ...rom full load to no load and no load to full load was applied to test the dynamic response of the system The output voltage is tightly regulated within a 3 regulation band over the entire line load ra...

Страница 14: ...tem power management functions for reducing overall standby power consumption by disabling the down converter when no power is being requested by the converter main output voltage rails Ch 1 Low side...

Страница 15: ...30 0 150 0 170 0 190 0 210 0 Efficiency Output Power W Efficienyvs Output Power 400Vdc input 270Vac input Figure 8 Efficiency plot 5 6 Thermal Data The thermal performance of IRS27951 demo board is te...

Страница 16: ...ctrical Diagram 9 7 14 17 20 11 13 19 2 5 18 12 TX Note pin19 is shorted to pin18 on PCB pin13 is shorted to pin12 on PCB 6 2 Resonant Transformer Winding Position on Coil former 6 3 Resonant Transfor...

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