11 kW OBC Reference Design
A three-phase On Board Charger (OBC) platform achieving state-of-the-art system efficiency with AEC-Q SiC power devices and drivers.Learn More
The 60WLEDBULBGEVB Evaulation Board showcases an enhanced parallel-to-series LED lighting circuit. It uses updated control circuitry that allows the ability to accommodate multiple LED voltages by simply adjusting a single resistor (R3) as well as compensating for drift in LED voltage with temperature. It also has superb PF and THD performance, dimmability, low cost, and
This circuit uses a parallel-to-series topology that dynamically adjusts LED load voltage as the instantaneous bridge output voltage varies. While a switch-mode power supply such as 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 instantaneously 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 efficiency, PF, and THD performance.
|Dimmable, 9.5 W, 120 Vac CCR Lighting Circuit Evaluation Board||
MMBT6517LT1G , MMBTA56LT1G ,
MMSZ5265BT1G , NSIC2030JBT3G ,
NSIC2050JBT3G , NSS1C200LT1G ,
|Eval Board: BOM||60WLEDBULBGEVB Bill of Materials ROHS Compliant||60WLEDBULBGEVB_BOM_ROHS.pdf - 49 KB||0|
|Eval Board: Gerber||60WLEDBULBGEVB Gerber Layout Files (Zip Format)||60WLEDBULBGEVB_GERBERS.zip - 553 KB||0|
|Eval Board: Schematic||60WLEDBULBGEVB Schematic||60WLEDBULBGEVB_SCHEMATIC.pdf - 69 KB||0|
|Eval Board: Test Procedure||60WLEDBULBGEVB Test Procedure||60WLEDBULBGEVB_TEST_PROCEDURE.pdf - 43 KB||0|
|Video||60W Equivalent LED Design Demonstration - 60WLEDBULBGEVB||WVD17603/D|