RT6200GE Evaluation Board your power partner. RT6200GE Evaluation Board Purpose The RT6200 is a high voltage Buck converter that can deliver up to 0.6A output current from a wide input voltage range of 4.5V to 36V. This document explains the function and use of the RT6200 evaluation board (EVB) and provides information to enable operation and modification of the evaluation board and circuit to suit individual requirements. Table of Contents PURPOSE................................................................................................................................................................................ 1 INTRODUCTION...................................................................................................................................................................... 2 KEY PERFORMANCE SUMMARY TABLE ................................................................................................................................... 2 BENCH TEST SETUP CONDITIONS............................................................................................................................................ 3 SCHEMATIC, BILL OF MATERIALS AND BOARD LAYOUT........................................................................................................... 5 MORE INFORMATION........................................................................................................................................................... 10 IMPORTANT NOTICE FOR RICHTEK REFERENCE DESIGNS ...................................................................................................... 10 UG6200GE-00 January 2015 1 http://www.richtek.com RT6200GE Evaluation Board your power partner. Introduction General Product Information The RT6200 is a high voltage Buck converter that can support the input voltage range from 4.5V to 36V and the output current can be up to 0.6A. Current mode operation provides fast transient response and eases loop stabilization. The chip also provides protection functions such as cycle-by-cycle current limit and thermal shutdown protection. The RT6200 is available in the SOT-23-6 package. Product Feature Wide Operating Input Voltage Range : 4.5V to 36V Adjustable Output Voltage Range : 0.8V to 15V 0.6A Output Current 0.35Ω Internal Power MOSFET Switch High Efficiency up to 95% 1.2MHz Fixed Switching Frequency (Duty <90%) Support duty up to 95% Stable with Low ESR Output Ceramic Capacitors Thermal Shutdown Cycle-By-Cycle Over-Current Protection Key Performance Summary Table Key Features Evaluation Board Number: PCB008_V1 Default Input Voltage 12V Max Output Current 0.6A Default Output Voltage 5V Default Marking & Package Type RT6200GE Operation Frequency Steady 1.2MHz at all loads Other Key Features 4.5V to 36V Input Voltage Range Support duty up to 95% Protection Cycle-By-Cycle Over Current Protection Thermal Shutdown UG6200GE-00 January 2015 2 http://www.richtek.com RT6200GE Evaluation Board your power partner. Bench Test Setup Conditions Headers Description and Placement Please carefully inspect the EVB IC and external components, comparing them to the following Bill of Materials, to ensure that all components are installed and undamaged. If any components are missing or damaged during transportation, please contact the distributor or send e-mail to [email protected] Test Points The EVB is provided with the test points and pin names listed in the table below. Test point/ Signal Comment (expected waveforms or voltage levels on test points) VIN Input voltage Input voltage range= 4.5V to 36V VOUT Output voltage Default output voltage = 5.0V Pin name Output voltage range= 0.8V to 15V (see ‘’ Output Voltage Setting’’ section for changing output voltage level) SW Switching node test point SW waveform EN Enable test point Enable signal. EN is automatically pulled high by internal circuit to enable operation. Connect EN low (or by R4 pull low resistor) to disable operation. BST Boot strap supply test point Floating supply voltage for the high-side N-MOSFET switch GND Ground Ground Power-up & Measurement Procedure 1. Apply a 12V nominal input power supply (4.5V < VIN < 36V) to the VIN and GND terminals. 2. The EN voltage is pulled to logic high by internal circuit to enable operation. Drive EN high (>2.5V) to enable operation or low (<0.4V) to disable operation. 3. There is a 3-pin header JP2 “EN” for enable control. To use a jumper at “H” option to tie EN test pin to input power VIN for enabling the device. Inversely, to use a jumper at “L” option to tie EN test pin and ground GND for disabling the device. UG6200GE-00 January 2015 3 http://www.richtek.com RT6200GE Evaluation Board your power partner. 4. Verify the output voltage (approximately 5.0V) between VOUT and GND. 5. Connect an external load up to 0.6A to the VOUT and GND 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 set by the following formula: VOUT = 0.8 x (1 + R1 ) R2 The installed VOUT capacitor (C4) is 22μF, 16V X5R ceramic types. Do not exceed their operating voltage range and consider their voltage coefficient (capacitance vs. bias voltage) and ensure that the capacitance is sufficient to maintain stability and provide sufficient transient response for your application. This can be verified by checking the output transient response as described in the RT6200 IC datasheet. UG6200GE-00 January 2015 4 http://www.richtek.com RT6200GE Evaluation Board your power partner. Schematic, Bill of Materials & Board Layout EVB Schematic Diagram C2: 10μF/50V/X5R, 1206, TDK C3216X5R1H106K C4: 22μF/16V/X5R, 1210, Murata GRM32ER61C226K L1: 15μH TAIYO YUDEN NR8040T150M, DCR=50mΩ UG6200GE-00 January 2015 5 http://www.richtek.com RT6200GE Evaluation Board your power partner. Bill of Materials Reference Qty Part number Description Package Manufacture U1 1 RT6200GE DC-DC Converter SOT-23-6 RICHTEK C2 1 C3216X5R1H106K160AB 1206 TDK 1210 Murata 0603 Murata 10μF/±10%/50V/X5R Ceramic Capacitor 22μF/±10%/16V/X5R 1 C4 GRM32ER61C226KE20# Ceramic Capacitor 10nF/±10%/50V/X7R 1 C8 GRM32MR71H103KA01# Ceramic Capacitor 15μH/2.7A/±20%, DCR=50mΩ, 1 L1 NR8040T150M TAIYO 8mmx8mmx4mm Inductor YUDEN R1 1 91kΩ/±1%, Resistor 0603 R2 1 17.4kΩ/±1%, Resistor 0603 CP1 1 Short D1 1 JP2 1 3-Pin Header 0 Not Installed B340A 40V/3A Schottky Diode Diodes C1, C3, C5, C6, C7, C9, C10, R4, 0603 R5, D2 TP 3 GP 6 BST, SW, EN Test Pin VIN, GND, VOUT, GND, Golden Pin GND, GND UG6200GE-00 January 2015 6 http://www.richtek.com RT6200GE Evaluation Board your power partner. EVB Layout st Top View (1 layer) Bottom View (4th Layer) UG6200GE-00 January 2015 7 http://www.richtek.com RT6200GE Evaluation Board your power partner. st Component Placement Guide—Component Side (1 layer) st PCB Layout—Component Side (1 Layer) UG6200GE-00 January 2015 8 http://www.richtek.com RT6200GE Evaluation Board your power partner. PCB Layout—Bottom Side (4th layer) UG6200GE-00 January 2015 9 http://www.richtek.com RT6200GE Evaluation Board your power partner. More Information For more information, please find the related datasheet or application notes from Richtek website http://www.richtek.com. Important Notice for Richtek Reference Designs 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 STATUTORY, WITH RESPECT TO THE PRESENTATION HEREIN. IN NO EVENT SHALL RICHTEK BE LIABLE T O BUYER OR USER FOR ANY AND ALL DAMAGES INCLUDING WITHOUT LIMITATION TO DIRECT, INDIRECT, SPECIAL, PUNITIVE OR CONSEQUENTIAL DAMAGES. Connect Richtek Through WeChat 微信扫一扫，服务马上到！ UG6200GE-00 January 2015 10 http://www.richtek.com