Complete Guide to SMD LEDs with Built-in ICs: Types, Applications, and Advantages

 

What is the first thing that springs to mind when you think of the LED industry? The solution lies in SMD LEDs. SMD LEDs are now a fundamental component of optoelectronics, particularly those with built-in ICs. Numerous consumer electronics, automobiles, and industrial displays employ this technology.

 

1.What is An SMD LED with Built-in IC?

An SMD LED with a built-in IC is a tiny optoelectronic component. Surface-mount chip packages integrate an LED with a driver/control IC. Surface mount technology, which is used for a three-in-one design, allows the chip to be soldered directly onto the PCB. This design combines electronic drive, intelligent controls, and light emission into a single structure.

 

2.The Conventional Design of An SMD LED with Built-in IC

2.1 Light-emitting layer

This LED chip combines a YAG-phosphor with a GaN-blue LED chip. It emits white light, which typically has a color temperature range of 2700K to 6500K.

 

2.2 Control layer

Driver ICs have integrated circuitry. These include a constant-current source, a dimming module with PWM, and a protocol decoder. Signal processing is usually done by the decoder using SPI/I2C/single wire interfaces.

Three layers of protection are also included in the integrated circuitry: thermal shutdown, thermal overcurrent and overvoltage. To safeguard the circuit, they’re automatically triggered when specific criteria are crossed.

 

2.3 Packaging Structure

Substrate material:Good-temperature co-fired ceramic and epoxy resin with good thermal conductivity are typically used as the lamp bead’s substrate materials.

The microlens array is integrated into the lamp bead. The lamp beam angle is 120deg+-10%. The uniformity of the light is greater than 90%.