The 100 W LED ballast offers 3 gentle ranges, works with enter voltages, makes use of fewer elements, and runs with a two-part design.
RDK-801 is a 100 W reference design from Energy Integrations for an LED ballast with 3-way dimming. It delivers fixed present for LED strings working between 36 V and 48 V, supporting output currents from 0 mA as much as 2080 mA. It accepts a large enter voltage vary from 100 VAC to 277 VAC, making it appropriate for international functions.
The ballast makes use of a two-stage energy provide structure. The primary stage is an influence issue correction (PFC) increase converter based mostly on the PFS7626C from the HiperPFS-4 household. This extremely built-in system combines a steady conduction mode (CCM) PFC controller, gate driver, and a 600 V energy MOSFET right into a single InSOP-24D package deal. It eliminates the necessity for exterior present sense resistors and adjusts switching frequency dynamically based mostly on enter voltage, output load, and line cycle circumstances.
The second stage is an remoted flyback DC-DC converter utilizing the LYT6079C from the LYTSwitch-6 household. This system integrates the primary-side change, management circuitry, and secondary-side synchronous rectification. It additionally makes use of FluxLink know-how to transmit indicators throughout the isolation barrier with out the necessity for an optocoupler, enhancing system reliability and decreasing part depend.
The enter stage incorporates a fuse for overcurrent safety, a varistor for surge safety, and an NTC thermistor to restrict inrush present. EMI filtering and full-bridge rectification assist preserve low THD and excessive energy issue.
Using built-in units considerably reduces part depend. There’s no want for exterior present sense resistors, optocouplers, or separate gate drivers. This results in a smaller PCB footprint and a extra dependable design.
The PFC stage maintains excessive effectivity throughout a large load vary, together with light-load circumstances, by adjusting the switching frequency. The system meets regulatory necessities for energy issue and THD with out extra correction circuits.
Constructed-in security options within the ICs—comparable to over-voltage, over-current, and thermal safety—simplify compliance and enhance fault tolerance.
For producers, the simplified design lowers meeting value, shortens improvement time, and will increase product reliability. Vitality effectivity ensures compliance with international laws and reduces thermal stress, enhancing long-term efficiency.
For finish customers, 3-way dimming provides versatile lighting management with out requiring separate dimmer circuits. Excessive effectivity reduces vitality consumption, cuts working prices, and extends the lifetime of the LED fixture.
Energy Integrations has examined this reference design. It comes with a invoice of supplies (BOM), schematics, meeting drawing, printed circuit board (PCB) format, and extra. The corporate’s web site has extra information in regards to the reference design. To learn extra about this reference design, click on right here.
