Texas Instruments LM3407
The LM3407 device is a constant current output floating buck switching converter designed to provide constant current to high-power LEDs. The device is ideal for automotive, industrial, and general lighting applications. The LM3407 has an integrated power Nchannel MOSFET that makes the application solution compact and simple to implement.- Min Voltage : 4.5V
- Max Voltage : 30V
- Channels : 1
- Max Operating Temp : 125°C
- Min Operating Temp : -40°C
Source:
Octopart
| Part No. | LM3407 |
|---|---|
| Datasheet | LM3407 Download |
| Manufacturer |  Texas Instruments |
| Description | 350-mA Constant Current Output Floating Buck Switching Converter |
| Buy | Stock & Price |
FEATURES
●1 Input Operating Range 4.5 V to 30 V● Output Voltage Range: 0.1 VIN to 0.9 VIN
● Accurate Constant Current Output
● Independent Device Enable (CMOS Compatible) and PWM Dimming Control
● Converter Switching Frequency Adjustable From 300 kHz to 1 MHz
● No External Control Loop Compensation Required
● Supports Ceramic and Low ESR Output Capacitors
● Input Undervoltage Lockout (UVLO)
● Thermal Shutdown Protection
● MSOP-8 PowerPAD Package 2
APPLICATIONS
● LED Drivers● Constant Current Sources
● Automotive Lighting
● General Illumination
● Industrial Lighting 3
DESCRIPTION
An external 1% thick-film resistor allows the converter output voltage to adjust as needed to deliver constant current within 10% accuracy to a serially connected LED string of varying number and type. Converter switching frequency is adjustable from 300 kHz to 1 MHz. The LM3407 features a dimming input to enable LED brightness control by Pulse Width Modulation (PWM). Additionally, a separate enable pin allows for lowpower shutdown.
