Richtek RT7247AHGSP Manual Download Page 11

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RT7247AHGSP

Evaluation Board

UG7247AHGSP-00 July 2014

www.richtek.com

More Information

For more information, please find the related datasheet or application notes from Richtek website

http://www.richtek.com

Important Notice for Richtek Evaluation Board

THIS DOCUMENT IS FOR R

EFERENCE ONLY, NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK’S WARRANTY, EXPRESS

OR IMPLIED, UNDER CONTRACT, TORT OR STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE TO

BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL

DAMAGES.

Summary of Contents for RT7247AHGSP

Page 1: ...s information to enable operation and modification of the evaluation board and circuit to suit individual requirements Table of Contents Purpose 1 Introduction 2 General Product Information 2 Key Perf...

Page 2: ...inates input current surge during start up The RT7247A also provides output under voltage protection and thermal shutdown protection The low current 3 A shutdown mode provides output disconnection ena...

Page 3: ...lt Input Voltage 12V Max Output Current 2A Default Output Voltage 3 3V Default Marking Package Type RT7247AHGSP PSOP 8 Exposed Pad Operation Frequency Steady 340kHz at all loads Other Key Features 4 5...

Page 4: ...the test points and pin names listed in the table below Test point Pin name Signal Comment expected waveforms or voltage levels on test points VIN Input voltage Input voltage range 4 5V to 18V VOUT O...

Page 5: ...terminals and verify the output voltage and current Output Voltage Setting Set the output voltage with the resistive divider R1 R2 between VOUT and GND with the midpoint connected to FB The output is...

Page 6: ...GND 4 9 SS 8 EN 7 COMP 6 FB 5 L1 10uH C10 0 1uF TP2 SS R4 100k R5 NF C13 NF C1 10uF C2 10uF C4 22uF C8 NF C7 3 3nF C3 0 1uF C5 22uF R1 75k R2 24k R3 13k C6 0 1uF TP1 EN C11 0 1uF C9 NF D2 NF D1 NF VOU...

Page 7: ...1C226KE20 22uF 10 16V X5R Ceramic Capacitor 1210 Murata C7 1 0603B332K500 3 3nF 10 50V X7R Ceramic Capacitor 0603 WALSIN C3 C6 C10 C11 4 C1608X7R1H104K080AA 0 1uF 10 50V X7R Ceramic Capacitor 0603 TDK...

Page 8: ...RT7247AHGSP Evaluation Board UG7247AHGSP 00 July 2014 www richtek com 8 EVB Layout Top View 1 st layer Bottom View 2nd Layer...

Page 9: ...RT7247AHGSP Evaluation Board UG7247AHGSP 00 July 2014 www richtek com 9 Component Placement Guide Component Side 1 st layer PCB Layout Component Side 1 st Layer...

Page 10: ...RT7247AHGSP Evaluation Board UG7247AHGSP 00 July 2014 www richtek com 10 Component Placement Guide Bottom Side 2 nd layer PCB Layout Bottom Side 2 nd layer...

Page 11: ...rtant Notice for Richtek Evaluation Board THIS DOCUMENT IS FOR REFERENCE ONLY NOTHING CONTAINED IN THIS DOCUMENT SHALL BE CONSTRUED AS RICHTEK S WARRANTY EXPRESS OR IMPLIED UNDER CONTRACT TORT OR STAT...