350-mA constant, constant current output floating buck switching converter for high power LEDs
Product details
Parameters
Package | Pins | Size
Features
- 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
Description
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 N-channel MOSFET that makes the application solution compact and simple to implement. 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 low-power shutdown. An exposed pad MSOP-8 package provides excellent heat dissipation and thermal performance. Input UVLO and output open-circuit protection ensure a robust LED driver solution.
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM3407 350-mA, Constant Current Output Floating Buck Switching Converter for High-Power LEDs datasheet (Rev. C) | Nov. 15, 2016 |
White paper | Common LED Functions and LED Driver Design Considerations | Sep. 21, 2020 | |
Technical articles | Here's how body electronics and lighting technology are changing the driving experience | Sep. 26, 2016 | |
Technical articles | LED brightness adjustment: high-frequency PWM dimming | Aug. 26, 2016 | |
User guide | LM3407 Component Calculator (Rev. A) | May 23, 2016 | |
Technical articles | Take better selfies with innovative LED flashes | Nov. 18, 2014 | |
Technical articles | Solving the automotive EMI issues in new cars with all the screens | Sep. 10, 2014 | |
Application note | AN-1656 Design Challenges of Switching LED Drivers (Rev. A) | May 03, 2013 | |
Application note | AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) | Apr. 23, 2013 | |
User guide | AN-1763 LM3407 Evaluation Board Reference Design (Rev. A) | Jan. 21, 2009 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LM3407 evaluation board contains a Pulse-Width-Modulation (PWM) floating buck converter with an integrated N-Channel power MOSFET and is designed to provide a constant current output for driving high power LEDs, such as the Lumileds Luxeon® power LEDs and OSRAM Golden DRAGON® LED.
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HVSSOP (DGN) | 8 | View options |
Ordering & quality
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- Ongoing reliability monitoring
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