EVB_RT9480GQW

your power partner. RT9480GQW Evaluation Board Dual Output Power Bank Reference Design Using RT9480 EZPBS™ Integrated Chip Purpose The RT9480 is a high integration and this single chip includes a linear charger a synchronous Boost with dual output load management and a torch function support.This document explains the function and use of the RT9480 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 General Description ........................................................................................................................................... 2 Features ............................................................................................................................................................. 2 Application ......................................................................................................................................................... 2 Evaluation Board ............................................................................................................................................... 2 Specification ...................................................................................................................................................... 3 Schematic .......................................................................................................................................................... 3 BOM.................................................................................................................................................................... 4 PCB Layout ........................................................................................................................................................ 4 LED Indicator Function...................................................................................................................................... 5 Charging Test with 6000mAh ............................................................................................................................ 6 Boost Efficiency Test ........................................................................................................................................ 6 More Information ............................................................................................................................................... 7 Important Notice for Richtek Evaluation Board................................................................................................ 7 EVB_RT9480GQW-00 June 2015 http://www.richtek.com your power partner. RT9480GQW Evaluation Board Introduction General Product Description The RT9480 is a high integration and easy to use power solution for Li-ion power bank and other powered handheld applications. We call it EZPBS™ (Easy to Use Power Bank Solution). This single chip includes a linear charger a synchronous Boost with dual output load management and a torch function support. The battery volume and the state of charging and discharging can be indicated by 4LEDs. The RT9480 is available in the WQFN-24L 4x4 package. Product Features EZPBS™ (Easy to Use Power Bank Solution)    Compact BOM Elements with EZPBS™ Single Chip Protection Functions (OTP, OVP, OCP, VBUS and Output Short Protection) Support Charging and Discharging at the same time by Smart Algorithm Charger      One Linear Charger up to 1.2A DPM Function (Dynamic Power Management) Thermal Regulation Auto-Recharge Support JEITA Function USB Output     Support Dual USB Output Auto and Button Control One Sync-Boost up to 2.5A Peak Efficiency 97% Battery State of Charge (SOC) Indicator  Battery SOC Detection Support NTC for Battery Temperature Sensing  4 LEDs for Battery SOC Display  Application  Li-ion Power Bank Evaluation Board 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 evb_service@richtek.com EVB_RT9480GQW-00 June 2015 http://www.richtek.com RT9480GQW Evaluation Board your power partner. 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) VBAT Input voltage Input voltage range = 3V to 4.2V USBOUT Output voltage Output voltage = 5.1V VBUS Input voltage Input voltage range = 4.75V to 5.25V GND Ground Ground Power-up & Measurement Procedure 1. RT9480 starts work by provide VBAT voltage then plug-in VBUS. 2. Chargeing: Adapter or USB plug-in 3. Discharging: PD plug-in Specification Parameter Symbol VBUS Operation Voltage Range Output Voltage Min Typ. Max Units 5 5.5 V VOUTBST 5.1 V Switching Frequency FSW 250 kHz MAX Output Current IOUT 2.5 A Battery Quiescent Current for Standby_Auto Mode IBAT_sdy 90 μA Battery Quiescent Current for Standby_Button Mode IBAT_sdy 30 μA Schematic EVB_RT9480GQW-00 June 2015 http://www.richtek.com RT9480GQW Evaluation Board your power partner. BOM Reference Q'ty P/N Description Package Manufacture U7 1 RT9480 E2U Power Bank Solution WQFN-24L 4x4 RICHTEK U9 1 S-8261ACKMD-G4KT2x Battery Protection IC SOT-23-6 SEIKO U10, U11 2 SIS438DN NMOS SIS438DN VISHAY C1, C3, C7 3 EMK212ABJ106KD-T 10μF/16V/X5R C-0805 TAIYO C2, C6, C8 3 EMK212B7105KD-T 1μF/16V/X7R C-0805 TAIYO C4, C5 2 LMK212BBJ226MD-T 22μF/10V/X5R C-0805 TAIYO C10 1 UMR107B7104KA-T 0.1μF/50V/X7R C-0603 TAIYO L1 1 LVS505040-1R0-N Power Inductor L-NR8040 CHILISIN R1 1 RM06FTN1002 10K/0603/1% R-0603 TA-I R7, R8 2 RM04FTN4992 49.9K/0402/1% R-0402 TA-I R9 1 RM04FTN4700 470/0402/1% R-0402 TA-I R10 1 RM04FTN2001 2K/0402/1% R-0402 TA-I D1, D2, D3, D4 4 SMD LED D-0603 SW1 1 USB2 1 USB-MICRO USB-MICRO JP3 1 USB PortX2 USB-A SW KEY-YM061 Switch PCB Layout Top View EVB_RT9480GQW-00 June 2015 Bottom View http://www.richtek.com your power partner. RT9480GQW Evaluation Board LED Indicator Function About LED indicator, it will follow below table to show SOC. The LED current is 0.75mA. ●●●● Low→High ● : LED ON, ○ : LED OFF, ● : LED FLASH Battery Voltage Operation of Charging ●○○○ ●●○○  3700mV ●●●○ ●●●● ●●○○  3700mV  3940mV ●●●○ ●●●● ●●●○  3940mV  4100mV ●●●●  4100mV  4200mV ●●●● 4200mV ●●●● Battery Voltage Operation of Discharging  4200mV  3880mV ●●●●  3880mV  3720mV ●●●○  3720mV  3500mV ●●○○  3500mV  3200mV  3200mV  2800mV EVB_RT9480GQW-00 ●○○○ ●○○○ June 2015 http://www.richtek.com RT9480GQW Evaluation Board your power partner. Charging Test with 6000mAh 4.5 1,600 1,500 VBAT (V) 4 1,300 1,200 1,100 1,000 900 3.5 800 700 600 500 3 Charge Current (mA) 1,400 VBAT IVBUS 400 300 200 100 2.5 0 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000 Charge Time (sec.) Boost Efficiency Test Efficiency (%) 100 90 3.1V 80 3.2V 70 3.3V 60 3.4V 50 3.7V 40 3.9V 30 4.2V 20 10 0 0.1 1 10 IOUT (A) EVB_RT9480GQW-00 June 2015 http://www.richtek.com your power partner. RT9480GQW Evaluation Board 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_RT9480GQW-00 June 2015 http://www.richtek.com