UIC1WGEVB: Low Cost Universal AC Input LED Circuit Evaluation Board

This circuit uses active switching to change how the load is being driven. The LED load will either be driven from the capacitor, C1, discharging, or directly from the AC source. The CCR ensures a constant current through the LED throughout all modes of operation. The switching point of the circuit may be changed by varying the resistor, R1. Changing this switching point will change the amount of time the capacitor is charging. If a higher power output is desired a higher current CCR can be used and the switching point will need to be changed. A metal oxide varistor and fuse are designed into the circuit for surge protection purposes.

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description	Parts Used
UIC1WGEVB	Active	Pb-free	Low Cost Universal AC Input LED Circuit Evaluation Board	DBB08G-TM-E MMBT3906LT1G MMBT6520LT1G MMSZ5270BT1G NSIC2020JBT3G PZTA96ST1G

Technical Documents

Type	Document Title	Document ID/Size	Rev
Design Notes	Low Cost Universal Input AC LED Circuit	DN05087/D - 554 KB	0
Eval Board: Test Procedure	UIC1WGEVB Test Procedure	UIC1WGEVB_TEST_PROCEDURE.pdf - 152 KB	0
Eval Board: Schematic	UIC1WGEVB Schematic	UIC1WGEVB_SCHEMATIC.pdf - 46 KB	0
Eval Board: Gerber	UIC1WGEVB Gerber Layout Files (Zip Format)	UIC1WGEVB_GERBERS.zip - 12 KB	0
Eval Board: BOM	UIC1WGEVB Bill of Materials	UIC1WGEVB_BOM_ROHS.pdf - 37 KB	0
Video	Low Cost Universal AC Input LED Circuit Evaluation Board - UIC1WGEVB	WVD17600/D