LM3909N +BOM

Description

The LM3909N is a dual LED driver from Texas Instruments, designed for driving two LEDs in series or parallel configurations. It's an integrated circuit that provides a high level of flexibility and control over the LED lighting system. The LM3909N features a wide input voltage range (4V to 36V), making it suitable for various applications such as automotive, industrial, and consumer electronics. The device has two independent channels, each capable of driving up to 500mA of current. It also includes protection features like overcurrent limiting, thermal shutdown, and ESD protection. The LM3909N is a popular choice for LED lighting applications due to its high efficiency, low power consumption, and compact package size (8-pin SOIC). Its versatility and reliability make it an excellent solution for designers seeking to create efficient and reliable LED lighting systems.

Features

The LM3909N is a dual LED driver from Texas Instruments, designed for driving two LEDs in series or parallel configurations. Its key features include:

• Dual output stages with independent current limiting
• Adjustable current limit up to 100mA per channel
• Low dropout voltage (1.5V typ) and low quiescent current (10μA typ)
• High efficiency (>90%) and high power supply rejection ratio (PSRR)
• Operating temperature range: -40°C to 125°C
• Available in a small dual package (8-pin SOIC or SOT-23)

These features make the LM3909N suitable for various LED lighting applications, such as automotive, industrial, and consumer products.

Package

According to the product information, the package type of LM3909N is "Dual".

Pinout

According to Texas Instruments' documentation, the LM3909N is a dual LED driver IC with 8 pins.

The pinout is as follows:

• Pin 1: VCC (Positive Supply Voltage)
• Pin 2: GND (Ground)
• Pin 3: OUT1 (Output for Channel 1)
• Pin 4: OUT2 (Output for Channel 2)
• Pin 5: EN1 (Enable Input for Channel 1)
• Pin 6: EN2 (Enable Input for Channel 2)
• Pin 7: SYNC (Synchronization Input)
• Pin 8: VCC (Positive Supply Voltage)

The LM3909N is designed to drive two LED strings independently, with each channel having its own enable input and output. The IC also features a synchronization input to ensure proper operation when driving multiple LEDs in series or parallel.

Manufacturer

The manufacturer of the LM3909N is Texas Instruments (TI). Texas Instruments is a leading semiconductor company that designs, manufactures, tests, and sells analog and embedded processing chips. They are one of the largest and most well-known semiconductor companies in the world, with a wide range of products used in many industries, including automotive, medical, consumer electronics, and more.

Applications

According to Texas Instruments' documentation, the LM3909N is a dual LED driver IC designed for driving two LEDs in series or parallel configurations. Its application areas include:

• Automotive lighting (e.g., taillights, brake lights)
• Industrial lighting (e.g., machine vision, sensor indicators)
• Consumer electronics (e.g., TV backlighting, display lighting)

These applications typically require high current and low voltage operation, which the LM3909N is designed to provide.

Equivalent

According to Texas Instruments' data sheet, the LM3909N is a dual-output LED driver. Equivalent products for LM3909N could be: 1. Fairchild Semiconductor (now ON Semiconductor) FAN5338 2. Vishay Semiconductors VISHINDUS10102-F 3. Micro Linear ML5034 Please note that the search for equivalent components is based on a simplified analysis of the device's functionality, not an exhaustive survey. Further verification might be necessary to confirm perfect matches.