• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

need up using TTP223 touch sensor with high power LED


New Member
hi all,

I am trying to build a very simple circuit that uses a TTP223 module to control a high power LED such as a CREE XML, XPG, XRE powered by 1 single 3.7 li-ion battery. My understanding is that the output current max out at 8mA which is well below the operating amp of the LED itself. I have read about using transistors or mosfet to increase the current or voltage to achieve this but I can not figure out how to hook it up if both share the same power source. also I have looked at the CN5711 chip which is used as a constant current LED driver but I have no idea how to trigger it to get it to turn on and off with the TTP223. any help is appreciated. Thank you!.

TTP223: https://datasheet.lcsc.com/szlcsc/TTP223-BA6_C80757.pdf

CN5711: http://www.consonance-elec.com/pdf/datasheet/DSE-CN5711.pdf

CREE XML2: https://www.cree.com/led-components/media/documents/XLampXML2.pdf
forward voltage 2.85 V @ 700 mA

EE World Online Articles