ec49021 usb charger enhance ic e-cmos corp. ( www.ecmos.com.tw ) page 1 of 6 4i01n-rev.f002 descripti o oo o ns the ec49021 is designed for usb dedicated charging port (dcp) controller. the ec49021 can automaticall y detect and provide the correct signal on the d+ and d- data li nes to the usb devices. the internal dedicated char ging schemes can change the charging mode for the different usb devi ce. bc1.2 dcp that short the d+ line to the d- line apple divider dcp that apply specified voltage on the d+ and d- lines samsung specification that apply specified voltage on the d+ and d- lines the ec49021 set the usb interface data d+ and d- to the required condition then the handheld charging device will start to charge current as much as possible from the powe r source . feature operating range: 4.5v to 5.5v automatically switch data lines d+ and d- connecti ons for the attached usb device supports samsung device charging mode supports bc1.2 charging specification mode supports selectable apple 1a ,2a and 2.4a charging mode supports most of mainstream usb device fast chargi ng rohs compliant and lead-free package sot23-5 package application ac-dc wall adapter with usb port vehicle usb power charger other usb charger power bank usb charger ordering information ec49021nn xx x part number package marking marking information EC49021NNB2R sot23-5l 49021 lllll 1. lllll lot no. b2 sot23-5 r tape & reel
ec49021 usb charger enhance ic e-cmos corp. ( www.ecmos.com.tw ) page 2 of 6 4i01n-rev.f002 pin symbol type function 1 mode input internal default pull high mode selection: 1a, 2a and 2.4a 2 gnd ground ground 3 vcc power power 4 d bi-direction usb positive data line 5 d bi-direction usb negative data line pin information pin description reference application circuit
ec49021 usb charger enhance ic e-cmos corp. ( www.ecmos.com.tw ) page 3 of 6 4i01n-rev.f002 parameter min max units supply voltage vcc -0.3 7 v input / output voltage mode, d , d -0.3 7 v operating temperature range to -20 +85 storage temperature range ts -65 150 human body model (hbm) *note1 8 (class-3b) kv esd protection rating machine model (mm) *note2 200 (class-m4) v parameter conditions min typ max units vcc operating range, vcc - 4.5 - 5.5 v operating current, icc vcc=5v - 500 - ua mode, d , d d output impedance vcc=5v 35 - 65 k d output impedance vcc=5v 35 - 65 k mode, d , d - 0 - vcc, v absolute maximum ratings note1: testing facility: - testing ambient condition [temperature: 255 ] [humidity:5510 ] - reference documents [mil-std-883h/method 3015.8] - human body model rating: class 0: 0v ~ 249v class 1a: 250v ~ 499v class 1b: 500v ~ 999v class 1c: 1000v ~ 1999v class 2: 2000v ~ 3999v class 3a: 4000v ~ 7999v class 3b: 8000v ~ note2: testing facility: - testing ambient condition [temperature: 255 ] [humidity:5510 ] - reference documents [ahsi/esd s5.2-2009] - machine model rating class m1: 0v ~ 99v class m2: 100v ~ 199v class m3: 200v ~ 399v class m4: 400v ~ caution this integrated circuit has been designed carefully in the esd protection ability. failure to observe proper handling and installation procedures may cau se damage. recommend that all integrated circuits should be handled with appropriate precautions. electrical characteristics ( for vcc=5v and tj=25 o c )
ec49021 usb charger enhance ic e-cmos corp. ( www.ecmos.com.tw ) page 4 of 6 4i01n-rev.f002 mode function external pull-high with r1(1k ) apple 2a mode external pull-down with r2(1k ) apple 1a mode external pull-down with r2(2m ) apple 2.4a mode function description 1. the ec49021 is an usb dedicated charging port (d cp) controller. the built-in auto-detect function c an monitors the voltage of d+ and d- data lines. to provide t he correct voltage level on the d+ and d- data line s automatically, the compliant usb devices can be charged with the charging current as much as possible. that can red uce the charging time when use the ec49021 as the controller i n the usb charge feature kit. 2. mode truth table reference application circuit caution: when select the charge mode, please make sure the c urrent ability of power source that can provide the desiredcontinue current. any maximum continue charg ing current must not exceed the limited of the maxi mum current rating ofthe power source, like wall adapter, vehic le usb charger, and other usb charger. 2. the ec49021 only control the voltage of d / d lines on the usb port to support the auto-detect c harging procedure and does not control the usb power (v bus ) operation. the remaining battery capacity in the compliant usb devices may affect the charging current. if the remaining battery capacity is low, the charging cu rrent may be high. conversely the charging current may be low wh en the remaining battery capacity is high.
ec49021 usb charger enhance ic e-cmos corp. ( www.ecmos.com.tw ) page 5 of 6 4i01n-rev.f002 4. the ec49021 support most of the common protocols : usb battery charging specification, revision 1.2(b c 1.2) china telecommunications industry standard yd/t 15 91-2009 specified divider mode 5. there are three types of charging ports defined to provide different current to the usb device. standard downstream port(sdp) charging downstream port(cdp) dedicated charging port(dcp) the bc1.2 specification defines the charging us b port that provides power for the portable device. 6. dedicated charging port (dcp) the dcp is a downs tream port on the device which generally allows por table devices with fast charge at their maximum rated current . a usb charger with dcp can be a wall adapter or v ehicle power adapter. the electrical characteristics in the data d+ and d- data lines can identify the charging mode. 7. short the d+ line to the d- line the usb bc1.2 specification and the china telec ommunications industry standard yd/t 1501-2009 defi ne the d+ and d- should be shorted. this is shown as below 8. divider mode there are some different charging schemes for t he dcp mode. all of them have different voltage lev els on the d+ line and d- line. this is shown as below the ec49021 can detect the d+ line and d- line volt ages automatically and provide the correct signals on the d+ and d- pins for the different usb portable device to fast charge. important notice the products are not intended for use in life suppo rt appliances, devices, or systems. use in such applications are expressly prohibited.
ec49021 usb charger enhance ic e-cmos corp. ( www.ecmos.com.tw ) page 6 of 6 4i01n-rev.f002 package dimensions
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