40WLEDBULBGEVB: Dimmable 120 Vac, 6.5 W Input Parallel-to-Series Lighting Circuit Evaluation Board

ON Semiconductor’s parallel-to-series topology dynamically adjusts LED load voltage as the instantaneous bridge output voltage varies. While a switch-mode power supply (a buck converter) reconfigures the input voltage to match the load, this circuit reconfigures the load to match the input voltage. When the instantaneous input voltage is relatively low, the LEDs are configured in parallel. When the instantaneous input voltage is relatively high, the LEDs are configured in series. The circuit is designed for input voltages between 100 Vac and 140 Vac. ON Semiconductor CCRs are used to provide constant LED current and to protect LEDs from over-voltage conditions. The circuit employs an additional CCR (shown as CCR2) to increase LED current at high voltages for improved PF and THD performance.

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description	Parts Used
40WLEDBULBGEVB	Active	Pb-free	Dimmable 120 Vac, 6.5 W Input Parallel-to-Series Lighting Circuit Evaluation Board	NSIC2020JBT3G NSIC2030JBT3G

Technical Documents

Type	Document Title	Document ID/Size	Rev
Design Notes	Dimmable 120 Vac, 6.5 W Input Parallel-to-Series Lighting Circuit	DN05084/D - 513 KB	1
Eval Board: BOM	40WLEDBULBGEVB Bill of Materials ROHS Compliant	40WLEDBULBGEVB_BOM_ROHS.pdf - 34 KB	0
Eval Board: Gerber	40WLEDBULBGEVB Gerber Layout Files (Zip Format)	40WLEDBULBGEVB_GERBER.zip - 39 KB	0
Eval Board: Schematic	40WLEDBULBGEVB Schematic	40WLEDBULBGEVB_SCHEMATIC.pdf - 47 KB	0
Eval Board: Test Procedure	40WLEDBULBGEVB Test Procedure	40WLEDBULBGEVB_TEST_PROCEDURE.pdf - 34 KB	0
Video	40W Equivalent LED Design Demonstration - 40WLEDBULBGEVB	WVD17602/D