rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.richtek.com 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 descript ion ................................ ................................ ................................ ................................ ........... 2 features ................................ ................................ ................................ ................................ ............................. 2 application ................................ ................................ ................................ ................................ ......................... 2 evaluation board ................................ ................................ ................................ ................................ ............... 2 specification ................................ ................................ ................................ ................................ ...................... 3 schematic ................................ ................................ ................................ ................................ .......................... 3 bom ................................ ................................ ................................ ................................ ................................ .... 4 pcb layout ................................ ................................ ................................ ................................ ........................ 4 led indicator function ................................ ................................ ................................ ................................ ...... 5 chargi ng test with 6000mah ................................ ................................ ................................ ............................ 6 boost efficiency test ................................ ................................ ................................ ................................ ........ 6 more information ................................ ................................ ................................ ................................ ............... 7 important notice for richtek evaluation board ................................ ................................ ................................ 7 y o u r p o w e r p a r t n e r .
rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.richtek.com 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 ezpb s ? 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 ? suppor t 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 tha t all components are installed and undamaged. if any components are missing or damaged during transportation, please contact the di stributor or send e - mail to evb_service@richtek.com y o u r p o w e r p a r t n e r .
rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.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 vo ltage levels on test points) v bat input voltage input voltage range = 3 v to 4.2 v usbout output voltage o utput voltage = 5.1v vbus input voltage input voltage range = 4 .75 v to 5.25 v 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 min typ . max units v bus operation voltage range 5 5 .5 v output voltage voutbst 5.1 v switching frequency f s w 250 khz max output current i out 2.5 a battery quiescent current for standby _auto mode ibat_sdy 90 a battery quiescent current for standby_button mode ibat_sdy 30 a schematic y o u r p o w e r p a r t n e r .
rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.richtek.com 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 s eiko u10, u11 2 sis438dn nmos sis438dn vishay c1, c 3, c 7 3 emk212abj106kd - t 10 f/16v/x5r c - 0805 taiyo c2, c 6 , c 8 3 emk212b7105kd - t 1 f/16v/x7r c - 0805 taiyo c4, c 5 2 lmk212bbj226md - t 22 f/10v/x5r c - 0805 taiyo c 10 1 umr107b7104ka - t 0.1 f/50v/x7r c - 0603 taiyo l1 1 lvs505040 - 1r0 - n power inductor l - nr8040 chilisin r 1 1 rm0 6 ftn1002 10k/0 603 /1% r - 0 603 ta - i r 7 , r 8 2 rm04ftn4 99 2 4 9.9 k/0402/1% r - 0402 ta - i r 9 1 rm0 4 ftn4700 470/0 4 0 2 /1% r - 0402 ta - i r 10 1 rm0 4 ftn2001 2k/0 402 /1% r - 0402 ta - i d 1 , d 2 , d 3 , d 4 4 smd led d - 0603 sw1 1 sw key - ym061 switch usb2 1 usb - micro usb - micro jp3 1 usb portx2 usb - a pcb layout top view bottom view y o u r p o w e r p a r t n e r .
rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.richtek.com 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 fl a sh battery voltage operation of charging ? 37 0 0mv ? 37 0 0mv ? 3940mv ? 3940mv ? 4100mv ? 4100mv ? 4200mv 4200mv battery voltage operation of disc harging ? 4200mv ? 3880mv ? 3880mv ? 3720mv ? 3720mv ? 35 0 0mv ? 35 0 0mv ? 3200mv ? 3200mv ? 2800mv y o u r p o w e r p a r t n e r .
rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.richtek.com charging test with 6000mah boost efficiency test y o u r p o w e r p a r t n e r . 0 100 200 300 400 500 600 700 800 900 1,000 1,100 1,200 1,300 1,400 1,500 1,600 2.5 3 3.5 4 4.5 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 16,000 18,000 20,000 22,000 charge current (ma) v bat (v) charge time (sec.) vbat ivbus 0 10 20 30 40 50 60 70 80 90 100 0.1 1 10 efficiency (%) i out (a) 3.1v 3.2v 3.3v 3.4v 3.7v 3.9v 4.2v
rt 9480 gqw evaluation board evb_RT9480GQW - 00 june 2015 http://www.richtek.com more information for more information, please find the related datasheet or application notes from rich t ek 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 richteks 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. y o u r p o w e r p a r t n e r .
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