International Rectifier IRDC3847-P1V2 User Manual Download Page 6

IRDC3847-P1V2

Confidential

This evaluation board is a preliminary version meant for the engineering evaluation of the  IR3847. Based on the results of the 
continuing evaluation, this board  can evolve and change without notice

2/13/2012

6

Bill of Materials

Item

Quantity

Part Reference

Value

Description

Manufacturer

Part Number

1

5 C2 C3 C4  C5 C57

22uF

22uF,1206,16V, X5R, 20%

Panasonic

ECJ3YB1C226M

2

1 C1  

330uF

SMD Elecrolytic, Fsize, 25V, 
20%

Panasonic

EEV-FK1E331P

3

6

C9 C14 C24 C25 
C37 C33

0.1uF

0603, 25V, X7R, 10%

Panasonic

ECJ-1VB1E104K

4

1 C8

2200pF

2200pF,0603,50V,X7R

Panasonic

ECJ-1VB1H222K

5

1 C11

150pF

50V, 0603, NP0, 5%

Murata

GRM1885C1H151JA01
D

6

7 C15 C16  C17  C18 

C19 C20  C62

22uF

0805, 6.3V, X5R, 20%

TDK

C2012X5R0J226M

7

1 Vo

Tektronix test connector

Tektronix

131-5031-00  

8

1 C26

10nF

0603, 50V, X7R,  10%

Panasonic

ECJ-1VB1H103K

9

1 L1

0.150uH

0.150uH, DCR=0.29mohm

Cyntec

PCDC1008-R150EMO

10

1 R1

1K

0603,1/10W,1%

Rohm

MCR03EZPFX1001

11

1 R2

2.67K

0603,1/10W,1%

Rohm

MCR03EZPFX2671

12

1 R3

2.61K

0603,1/10W,1%

Rohm

MCR03EZPFX2611

13

1 R4

84.5

0603,1/10W,1%

Panasonic

ERJ-3EKF84R5V

14

1 R6

20

20,0603,1/10 W,1%

Vishay/Dale

CRCW060320R0FKEA

15

7

R8 R28 R10 R11 
R44 R33 R34 

0

0,0603,1/10 W,5%

Vishay/Dale

CRCW06030000Z0EA

16

1 C39

1uF

0603, X5R, 16V

TDK

C1608X5R1C105M

17

C66

10uF

0603, X5R, 10V

TDK

C1608X5R1A106M

18

2 R15 R32

23.2K

0603,1/10 W,1%

Rohm

MCR03EZPFX2322

19

2 R30 R31

0

1206,1/4 W,5%

Panasonic

ERJ-8GEY0R00V

20

1 R18

49.9K

49.9K,0603,1/10 W,1%

Rohm

MCR03EZPFX4992

21

1 R19

39.2K

39.2K,0603,1/10W,1%

Rohm

MCR03EZPFX3922

22

1 R9

23.2K

23.2K,0603,1/10W,1%

Rohm

MCR03EZPFX2322

23

1 R17

10K

0603,1/10 W,1%

Rohm

MCR03EZPFX1002

24

1 U1

IR3847

IR3847 5mm X6mm

International Rectifier

IR3847

Summary of Contents for IRDC3847-P1V2

Page 1: ...lockout for proper start up enhanced line load regulation with feed forward external frequency synchronization with smooth clocking internal LDO true differential remote sensing and pre bias start up...

Page 2: ...Vcc operation by installing R35 This version of the demoboard was built with a previous revision of the IR3847 for which Vp was pin 14 and Vref was pin 15 However in the new revision these pins have...

Page 3: ...ts are mounted on the top side of the board Power supply decoupling capacitors and feedback components are located close to IR3847 The feedback resistors are connected to the output of the remote sens...

Page 4: ...2 67K C4 22uF C15 22uF R6 20 C16 22uF R31 0 ohm R8 0 C17 22uF C35 N S C18 22uF R30 0 ohm C19 22uF PGD U1 IR3847 Vin 17 LGnd 11 Rt Sy nc 4 SW 22 Vcc 18 Comp 8 Vsns 6 PGnd 26 OCSelect 5 FB 7 Boot 2 PGD...

Page 5: ...hout notice 2 13 2012 5 Schematic for Transient Load set up Vout N S R38 N S C65 N S C59 N S C58 N S C64 N S C46 N S R22 N S R23 N S R24 N S R25 N S R45 N S ExtLoadCtrl 1 M1 IRF6721 N S U2 MIC4452 SO8...

Page 6: ...est connector Tektronix 131 5031 00 8 1 C26 10nF 0603 50V X7R 10 Panasonic ECJ 1VB1H103K 9 1 L1 0 150uH 0 150uH DCR 0 29mohm Cyntec PCDC1008 R150EMO 10 1 R1 1K 0603 1 10W 1 Rohm MCR03EZPFX1001 11 1 R2...

Page 7: ...ut notice 2 13 2012 7 TYPICAL OPERATING WAVEFORMS Vin 12 0V Vo 1 2V Io 0A 25A 1MHz Room Temperature no airflow Fig 5 Output Voltage Ripple 25A load Ch1 Vout Fig 6 Inductor node at 25A load Ch2 LX Fig...

Page 8: ...eering evaluation of the IR3847 Based on the results of the continuing evaluation this board can evolve and change without notice 2 13 2012 8 TYPICAL OPERATING WAVEFORMS Vin 12 0V Vo 1 2V Io 2 5A 10A...

Page 9: ...ering evaluation of the IR3847 Based on the results of the continuing evaluation this board can evolve and change without notice 2 13 2012 9 TYPICAL OPERATING WAVEFORMS Vin 12 0V Vo 1 2V Io 17 5A 25A...

Page 10: ...tion of the IR3847 Based on the results of the continuing evaluation this board can evolve and change without notice 2 13 2012 10 TYPICAL OPERATING WAVEFORMS Vin 12 0V Vo 1 2V Io 0A 25A 1MHz Room Temp...

Page 11: ...g evaluation of the IR3847 Based on the results of the continuing evaluation this board can evolve and change without notice 2 13 2012 11 Fig 12 Power loss versus load current Fig 11 Efficiency versus...

Page 12: ...on of the IR3847 Based on the results of the continuing evaluation this board can evolve and change without notice 2 13 2012 12 THERMAL IMAGES Vin 12 0V Vo 1 2V Io 0A 25A 1MHz Room Temperature No airf...

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