RT5047AGSP Evaluation Board your power partner. RT5047AGSP Single Output LNB Supply and Control Voltage Regulator Purpose The RT5047A is a highly integrated voltage regulator and interface IC, specifically design for supplying power and control signals from advanced satellite set-top box (STB) modules to the LNB down-converter in the antenna dish or to the multi-switch box. This document explains the function and use of the RT5047A evaluation board (EVB), and provides information to enable operation, 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 & Board Layout ........................................................................................................... 4 More Information.................................................................................................................................................... 7 Important Notice for Richtek Evaluation Board ....................................................................................................... 7 EVB_RT5047AGSP-00 December 2015 1 http://www.richtek.com RT5047AGSP Evaluation Board your power partner. Introduction General Product Information The device is consists of the independent current-mode boost controller and low dropout linear regulator along with the circuitry required for 22kHz tone shaping to support DiSEqC™ 1.x communications. The RT5047A provides fault protections including over-current, over-temperature and under-voltage lockout. The RT5047A is available in a SOP-8 (Exposed Pad) package to achieve optimized solution for thermal dissipation. Product Feature Wide Input Supply Voltage Range : 8V to 16V Output Current Limit of 550mA with 45ms timer Low Noise LNB Output Voltage (13.3V and 18.3V by SEL Pin) ±3% High Accuracy for 0mA to 500mA Current Output Push-Pull Output Stage minimizes 13.3V to 18.3V and 18.3V to 13.3V Output Transition Time External 22kHz Tone Input Meet DiSEqC™ 1.x Protocol Output Short Circuit Protection Over-temperature Protection Key Performance Summary Table Key Features Evaluation Board Number : PCB014_V1 Default Input Voltage 12V Max Output Current 500mA Default Output Voltage Low is for 13.3V, high is for 18.3V Default Marking & Package Type RT5047AGSP, SOP-8 (Exposed Pad) Operation Frequency 700kHz (Typ.) EVB_RT5047AGSP-00 December 2015 2 http://www.richtek.com RT5047AGSP 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/ Pin name Signal Comment (expected waveforms or voltage levels on test points) LNB LNB output pin Output Voltage for LNB. Output capacitor should not higher than 4.7µF. BOOST Boost feedback point Boost Output and Tracking Supply Voltage to LNB. LX Switch node Switching Node of DC/DC Boost Converter. VIN Input voltage Power Supply Input. EN Enable point High to enable the LNB and low to disable the LNB. SEL Output level select point Low for VLNB is 13.3V and high for VLNB is 18.3V. FAULT Fault detect point Open drain. Pull to 3.3V by 4.7kΩ resistor. This pin will pull to low when OCP trigger. TONE TONE input signal Supply a 22kHz signal at this pin to control the output tone signal. GND Ground The Exposed Pad must be soldered to a large PCB and connected to GND for maximum power dissipation. EVB_RT5047AGSP-00 December 2015 3 http://www.richtek.com RT5047AGSP Evaluation Board your power partner. Power-up & Measurement Procedure 1. Connect input power (8V < VIN < 16V) and input ground to VIN and GND test pins respectively. 2. To use a jumper at “H” option to tie EN test pin for enabling the device. Inversely, to use a jumper at “L” option to tie EN test pin and ground GND for disabling the device. 3. Supply a 22kHz signal of the “TONE” pin to adjust the output tone signal. 4. Verify the output voltage between LNB and GND. 5. Connect an external load up to 0.45A to the VOUT and GND terminals and verify the output voltage and current. Schematic, Bill of Materials & Board Layout EVB Schematic Diagram EVB_RT5047AGSP-00 December 2015 4 http://www.richtek.com RT5047AGSP Evaluation Board your power partner. Bill of Materials Reference Qty Part Number Description Package Manufacture U1 1 RT5047AGSP Voltage Regulator SOP-8 (Exposed Pad) RICHTEK C1, C2, C3, C4, C5, C6 6 10µF/50V C-0805 C8 1 100nF/25V C-0603 C9 1 0.1µF/50V C-0805 C10 1 NC R1, C7 2 NC R2 1 NC R3, R4, R6, R7 4 4.7k R-0603 R5 1 12k R-0603 R8 1 4k R-0603 L1 1 10µH L-NR8040_2 GP1, GP2, GP3 3 GND SIP-1P-GP GP4 1 VIN SIP-1P-GP GP5 1 LNB SIP-1P-GP D1, D2, D3 3 SS14 SS14 D4 1 SMDJ20A D-SMC_DO-214_1 J1 1 TONE SIP-3P J2 1 NC SIP-3P J3 1 SEL SIP-3P J4 1 EN SIP-3P Z1, Z2 2 FK_1 FK_1 Z3, Z4, Z5, Z6 4 SIP-1P-M SIP-1P-M EVB_RT5047AGSP-00 December 2015 5 http://www.richtek.com RT5047AGSP Evaluation Board your power partner. PCB Layout Top View Bottom View EVB_RT5047AGSP-00 December 2015 6 http://www.richtek.com RT5047AGSP 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 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 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. EVB_RT5047AGSP-00 December 2015 7 http://www.richtek.com