EVB_RT4801HWSC

RT4801HWSC Evaluation Board your power partner. RT4801H Dual Output LCD Bias for Smartphones and Tablets Purpose The RT4801H is a dual output LCD bias with the input voltage range from 2.5V to 5.5V and provides 80mA output current. This document explains the function and use of the RT4801H evaluation board (EVB), and provides information to enable operation, output voltage setting of the evaluation board. Table of Contents Purpose.........................................................................................................................................................................1 Introduction ...................................................................................................................................................................2 Bench Test Setup Conditions ........................................................................................................................................3 Schematic, Bill of Materials & Board Layout.................................................................................................................6 More Information ...........................................................................................................................................................8 Important Notice for Richtek Evaluation Board.............................................................................................................8 EVB_RT4801HWSC-00 December 2016 1 http://www.richtek.com RT4801HWSC Evaluation Board your power partner. Introduction General Product Information The RT4801H is a highly integrated Boost and LDO and inverting charge pump to generate positive and negative 2 output voltage. The output voltages can be adjusted from ±4V to ±6V with 100mV steps by I C interface protocols. With its input voltage range of 2.5V to 5.5V, RT4801H is optimized for products powered by single-cell batteries and symmetrical output currents up to 80mA. The RT4801H is available in the WL-CSP-15B 1.31x2.07 (BSC) package. Product Feature                2.5V to 5.5V Supply Voltage Range Up to 90% Efficiency with Small Magnetics Support Up to 80mA Output Current Low 1µA Shutdown Current Internal Soft-start Function Short Circuit Protection Function Over-Voltage Protection Function Over-Current Protection Function Over-Temperature Protection Function Elastic Positive and Negative Voltage On/Off Control by ENP/ENN Voltage Output from 4V to 6V per 0.1V Low Input Noise and EMI Output with Programmable Fast Discharge when IC Shutdown 2 Adjustable Output Voltage by I C Compatible Interface Available in the 15-Ball WL-CSP Package Key Performance Summary Table Key Features Evaluation Board Number: PCB084_V1 Default Input Voltage 3.7V Max Output Current 80mA Default Output Voltage VOP = 5V, VON = -5V Default Marking & Package Type RT4801HWSC, WL-CSP-15B 1.31x2.07 (BSC) EVB_RT4801HWSC-00 December 2016 2 http://www.richtek.com RT4801HWSC Evaluation Board your power partner. Bench Test Setup Conditions Carefully inspect all the components used in the EVB according to the following Bill of Materials table, and then make sure all the components are undamaged and correctly installed. If there is any missing or damaged component, which may occur during transportation, please contact our distributors or e-mail us at evb_service@richtek.com. 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) VIN Input voltage Input voltage with range 2.5V to 5.5V. ENP VOP Enable Enable control pin for VOP. ENN VON Enable Enable control pin for VON. GND Ground Ground. 2 I2C I C Control Pins to set function and output voltage. VOP Positive output voltage Default voltage: 5V±1%. VON Negative output voltage Default voltage: -5V±1%. LXP Switching Node of Boost Converter Test Pin Switching Node of Boost Converter. EVB_RT4801HWSC-00 December 2016 3 http://www.richtek.com RT4801HWSC Evaluation Board your power partner. Power-up & Measurement Procedure Connect input voltage (2.5V < VIN < 5.5V). 1. To use a jumper at “H” option to tie ENP or ENN test pin to input voltage VIN via CP3 or external voltage via CP2 for enabling the device. Inversely, to use a jumper at “L” option to tie ENP or ENN test pin to ground GND for disabling the device. 2 2. To verify the output voltage VOP and VON (±5V) via I C connector. 3. To connect an external load up to 80mA and verify the output voltage and current. Output Voltage Setting 2 The output voltage can be programmed by a MCU through the dedicated I C interface according to the VOP/VON voltage selection table. The device slave address is 0xE6. Table1. VOP Voltage Selection Name Register DATA Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 VOP (V) VOP 00h 00h Reserved Reserved Reserved 0 0 0 0 0 4 VOP 00h 01h Reserved Reserved Reserved 0 0 0 0 1 4.1 VOP 00h 02h Reserved Reserved Reserved 0 0 0 1 0 4.2 VOP 00h 03h Reserved Reserved Reserved 0 0 0 1 1 4.3 VOP 00h 04h Reserved Reserved Reserved 0 0 1 0 0 4.4 VOP 00h 05h Reserved Reserved Reserved 0 0 1 0 1 4.5 VOP 00h 06h Reserved Reserved Reserved 0 0 1 1 0 4.6 VOP 00h 07h Reserved Reserved Reserved 0 0 1 1 1 4.7 VOP 00h 08h Reserved Reserved Reserved 0 1 0 0 0 4.8 VOP 00h 09h Reserved Reserved Reserved 0 1 0 0 1 4.9 VOP 00h 0Ah Reserved Reserved Reserved 0 1 0 1 0 5 VOP 00h 0Bh Reserved Reserved Reserved 0 1 0 1 1 5.1 VOP 00h 0Ch Reserved Reserved Reserved 0 1 1 0 0 5.2 VOP 00h 0Dh Reserved Reserved Reserved 0 1 1 0 1 5.3 VOP 00h 0Eh Reserved Reserved Reserved 0 1 1 1 0 5.4 VOP 00h 0Fh Reserved Reserved Reserved 0 1 1 1 1 5.5 VOP 00h 10h Reserved Reserved Reserved 1 0 0 0 0 5.6 VOP 00h 11h Reserved Reserved Reserved 1 0 0 0 1 5.7 VOP 00h 12h Reserved Reserved Reserved 1 0 0 1 0 5.8 VOP 00h 13h Reserved Reserved Reserved 1 0 0 1 1 5.9 VOP 00h 14h Reserved Reserved Reserved 1 0 1 0 0 6 EVB_RT4801HWSC-00 December 2016 4 http://www.richtek.com RT4801HWSC Evaluation Board your power partner. Table 2. VON Voltage Selection Name Register DATA Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 VON (V) VON 01h 00h Reserved Reserved Reserved 0 0 0 0 0 -4 VON 01h 01h Reserved Reserved Reserved 0 0 0 0 1 -4.1 VON 01h 02h Reserved Reserved Reserved 0 0 0 1 0 -4.2 VON 01h 03h Reserved Reserved Reserved 0 0 0 1 1 -4.3 VON 01h 04h Reserved Reserved Reserved 0 0 1 0 0 -4.4 VON 01h 05h Reserved Reserved Reserved 0 0 1 0 1 -4.5 VON 01h 06h Reserved Reserved Reserved 0 0 1 1 0 -4.6 VON 01h 07h Reserved Reserved Reserved 0 0 1 1 1 -4.7 VON 01h 08h Reserved Reserved Reserved 0 1 0 0 0 -4.8 VON 01h 09h Reserved Reserved Reserved 0 1 0 0 1 -4.9 VON 01h 0Ah Reserved Reserved Reserved 0 1 0 1 0 -5 VON 01h 0Bh Reserved Reserved Reserved 0 1 0 1 1 -5.1 VON 01h 0Ch Reserved Reserved Reserved 0 1 1 0 0 -5.2 VON 01h 0Dh Reserved Reserved Reserved 0 1 1 0 1 -5.3 VON 01h 0Eh Reserved Reserved Reserved 0 1 1 1 0 -5.4 VON 01h 0Fh Reserved Reserved Reserved 0 1 1 1 1 -5.5 VON 01h 10h Reserved Reserved Reserved 1 0 0 0 0 -5.6 VON 01h 11h Reserved Reserved Reserved 1 0 0 0 1 -5.7 VON 01h 12h Reserved Reserved Reserved 1 0 0 1 0 -5.8 VON 01h 13h Reserved Reserved Reserved 1 0 0 1 1 -5.9 VON 01h 14h Reserved Reserved Reserved 1 0 1 0 0 -6 EVB_RT4801HWSC-00 December 2016 5 http://www.richtek.com RT4801HWSC Evaluation Board your power partner. Schematic, Bill of Materials & Board Layout EVB Schematic Diagram Bill of Materials Reference Qty Part number Description Package Manufacturer U1 1 RT4801HWSC Dual Output LCD Bias IC WL-CSP-15B 1.31x2.07 (BSC) RICHTEK C1, C6, C8 3 GRM188R61C475KAAJ 4.7µF/16V/0603 C-0603 Murata C5, C9 2 GRM188R61C106KAAL 10µF/16V/0603 C-0603 Murata L1 1 1269AS-H 2.2µH 2520 TOKO R4, R5 2 RC0603JR-074K7L 4.7K/0603 R-0603 Yageo EVB_RT4801HWSC-00 December 2016 6 http://www.richtek.com RT4801HWSC Evaluation Board your power partner. PCB Layout st Top View (1 layer) th Bottom View (4 Layer) EVB_RT4801HWSC-00 December 2016 7 http://www.richtek.com RT4801HWSC 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_RT4801HWSC-00 December 2016 8 http://www.richtek.com