Digital LEDs simplify design and reduce cost of low-power lighting arrays
The IN-PIS63BTPx family of red, green, blue and white LEDs from Inolux include an embedded controller and four pins to enable digital control signals to be passed from LED to LED in a simple daisy-chain configuration.
A circuit based on digital addressable LEDs eliminates the need for an expensive LED driver, as well as additional passive components and board traces
The Inolux IN-PIS63BTPx family of digitally addressable monocolor LEDs provides manufacturers of low-power light source systems with a new way to save space, reduce costs, and greatly simplify board layouts.
Traditional lighting system designs using arrays of analogue LEDs require complex board traces to connect each LED individually to an LED driver or a microcontroller with multiple inputs and outputs. This set-up demands numerous peripheral components, such as capacitors and resistors, to manage voltage division and current limiting.
The Inolux IN-PIS63BTPx monocolor LEDs provide for a much simpler circuit design. By using a single wire from the controller IC to the first LED, the control signal can be passed in a daisy-chain configuration to up to 999 other LEDs in the array. This dramatically simplifies wiring, reduces the size of the board layout, and eliminates the need for additional peripheral components, resulting in substantial reductions in both material and assembly costs.
The IN-PIS63BTPx series, the only monocolor digitally addressable LEDs on the market, enables manufacturers to achieve precise and customizable lighting effects in a more compact and efficient package than is possible with conventional LEDs.
Inolux has demonstrated that in a typical application circuit, replacing six conventional LEDs (powered by an 18-channel analogue LED driver and supported by three resistors and two capacitors) with six IN-PIS63BTPx LEDs can reduce bill-of-materials cost by up to 39%. Unlike the conventional approach with standard LEDs, which may require multiple boards, the Inolux addressable LEDs allow all components to be mounted on a single PCB, providing additional savings in board material and assembly costs.
Housed in a surface-mount 0603 package, the IN-PIS63BTPx LEDs support a data rate of 800 kbits/s, enabling a refresh rate of up to 30 frames per second.
| Part Number | Color Designation | Color Specification | Luminous Intensity |
| IN-PIS63BTPR | Red | 625 nm | 330 mcd |
| IN-PIS63BTPG | Green | 525 nm | 520 mcd |
| IN-PIS63BTPB | Blue | 460 nm | 110 mcd |
| IN-PIS63BTPW | White | x 0.275; y 0.265 | 300 mcd |