With the rapid development of the LED industry, the 2835 SMD LED has emerged as a popular choice for various lighting applications due to its compact size, high efficiency, and excellent performance. This article aims to provide an in-depth introduction to the specifications of the 2835 SMD LED, covering its design, characteristics, and applications.

Introduction to 2835 SMD LED Specifications

The 2835 SMD LED, also known as a 2835 surface-mounted device, is a type of LED that is designed to be mounted directly onto a printed circuit board (PCB). The "2835" refers to the dimensions of the LED package, which are typically 2.8mm in width and 3.5mm in length. This size makes it suitable for a wide range of applications, from small indicator lights to high-brightness lighting fixtures.

Physical Specifications

The physical specifications of a 2835 SMD LED include its dimensions, package type, and thermal characteristics. Here are some key points: - Dimensions: As mentioned, the 2835 LED package measures 2.8mm in width and 3.5mm in length, with a thickness of approximately 1.6mm. This compact size allows for high packing density on PCBs. - Package Type: The 2835 LED is available in a variety of package types, including the traditional SMD package, as well as more advanced packages like the COB (Chip on Board) and CSP (Chip Scale Package). Each package type has its own advantages and is chosen based on the specific application requirements. - Thermal Characteristics: The thermal resistance of a 2835 LED is an important consideration for heat management. It typically ranges from 100°C/W to 150°C/W, depending on the manufacturer and the package design. Good thermal management is crucial for ensuring the longevity and reliability of the LED.

Electrical Specifications

Electrical specifications define the performance of the 2835 SMD LED in terms of its forward voltage, current, luminous intensity, and efficiency. Here are the key electrical parameters: - Forward Voltage (Vf): The forward voltage of a 2835 LED is the voltage required to drive the LED at its rated current. It typically ranges from 2.8V to 3.2V for common color options like red, green, and blue. For white LEDs, the Vf can be higher, often around 3.2V to 3.6V. - Forward Current (If): The forward current is the current that flows through the LED when it is forward biased. For a 2835 LED, the typical forward current ranges from 20mA to 30mA. It is essential to operate the LED within its specified current range to prevent overheating and ensure optimal performance. - Luminous Intensity (Iv): Luminous intensity is a measure of the light output of the LED. It is typically expressed in milliwatts (mW) or candela (cd). The luminous intensity of a 2835 LED can vary significantly depending on the color and the manufacturer, but it generally ranges from 20mW to 50mW for common colors. - Efficiency: Efficiency is defined as the ratio of the luminous flux (lm) to the electrical power (W) consumed by the LED. A higher efficiency means the LED produces more light per unit of power. The efficiency of a 2835 LED can range from 50 to 100 lumens per watt (lm/W), with some high-efficiency models exceeding 100 lm/W.

Color and Wavelength Specifications

The color and wavelength specifications of a 2835 SMD LED are crucial for applications that require specific color rendering. Here are some details: - Color: 2835 LEDs are available in a wide range of colors, including red, green, blue, yellow, white, and RGB (red, green, blue). The color is determined by the phosphor coating applied to the LED chip. - Wavelength: The wavelength of a 2835 LED is the peak emission of the light. For example, a red LED might have a peak wavelength of around 620nm, while a blue LED might have a peak wavelength of around 470nm. White LEDs can have a wide range of peak wavelengths, typically between 460nm and 530nm for the blue chip, with a phosphor coating that emits the desired color of white.

Applications

The versatility of the 2835 SMD LED makes it suitable for a wide range of applications, including: - General Lighting: 2835 LEDs are commonly used in LED strips, panel lights, and downlights for general indoor and outdoor lighting. - Automotive Lighting: They are used in automotive lighting systems for indicator lights, brake lights, and tail lights. - Consumer Electronics: 2835 LEDs are used in various consumer electronics devices, such as smartphones, tablets, and laptops, for indicator lights and display backlights. - Signage and Advertising: The high brightness and color options of 2835 LEDs make them ideal for signage and advertising applications.

Conclusion

The 2835 SMD LED has become a staple in the LED industry due to its compact size, high efficiency, and excellent performance. Understanding the specifications of these LEDs is essential for designers and engineers to select the right components for their applications. As technology continues to advance, we can expect to see further improvements in the efficiency, color rendering, and thermal management of 2835 SMD LEDs, making them even more versatile and suitable for a wider range of applications.