GS Series DSC Digital LED Lighting Technology Designed by dsPIC33

This article introduces the main features of the digital LED lighting development kit using the dsPIC33 GS series DSC, the block diagram of the digital LED lighting development kit and the buck daughter board, the block diagram of the digital LED lighting development kit and the boost daughter board, the baseboard interface circuit diagram, the baseboard power supply circuit diagram, the baseboard DMX and analog circuit diagram, the components table used in the LED lighting baseboard, as well as the buck daughter board circuit diagram, the boost daughter board circuit diagram and the bill of materials for the digital LED lighting development kit.

The dsPIC33F series is a high-performance 16-bit digital signal controller (DSC) that uses an improved Harvard architecture and a C compiler-optimized instruction set. It has a 16-bit wide data bus and 24-bit wide instructions, and an operating speed of 40MIPS at 3.0-3.6V. It is suitable for multi-circuit switching power supplies (SMPS) and other digital power converters such as AC/DC converters, DC/DC converters, power factor correction (PFC), uninterruptible power supplies (UPS), inverters, embedded power controllers and digital lighting.

LED lighting applications supported by Microchip’s LED Lighting development Kit include dimmable LCD backlighting, signage, LED replacement of fluorescent tubes and incandescent bulbs, architectural lighting, and automotive lighting applications. Automotive lighting products include exterior applications, such as headlights, daytime running lights and signal lights.

Key features of Microchip’s Digital LED Lighting Development Kit include:

Color control for RGB LEDs

Supports DMX512 Standard for brightness control

Flexible input voltage support, including both Buck and Boost topologies

Fully dimmable

Full digital control

Fault protection

Fully controlled with a single dsPIC33FJ16GS504 DSC.

Figure 1. Digital LED Lighting Development Kit Outline

The LED Lighting Development Kit can be used to demonstrate the capabilities of Microchips “GS” series of dsPIC Digital Signal Controllers (DSCs) in controlling multiple High Brightness (HB) LEDs. The development kit uses separate daughter cards for both buck and boost applications.

The Digital LED Lighting Development Kit includes:

The LED Lighting Development Kit contains the following items:

• LED Lighting Development Kit Base Board

• Buck Daughter Card

• Boost Daughter Card

• Light Diffuser

• Information Sheet

Figure 2. Appearance of LED lighting substrate
Table of components used in LED lighting substrate:

Figure 4. Digital LED Lighting Development Kit and Boost Daughter Board Block Diagram

Figure 5. Baseboard Interface Circuit Diagram

Figure 6. Baseboard Power Circuit Diagram

Figure 7. Baseboard DMX and Analog Circuit Diagram

Figure 8. Buck Daughter Board Circuit Diagram

Figure 9. Boost Daughter Board Circuit Diagram
Digital LED Lighting Development Kit Bill of Materials (BOM):