LT3950 Datasheet PDF | Analog Devices

Analog Devices LT3950

The LT3950 has an internal PWM generator for dimming that maps an analog control signal to an exponential scale used to define PWM dimming duty ratio. This can be used to prevent damage to the part in case of open LED events. In addition to operating as a constant current source, the LT3950 also provides output voltage regulation.

Part No.	LT3950
Datasheet	LT3950 Download
Manufacturer	Analog Devices
Description	1.5A LED Driver
Buy	Stock & Price

FEATURES

n Operates in Boost, SEPIC, Buck Mode and BuckBoost Mode n 128:1 Internal Exponential Scale PWM Dimming n Wide Input Voltage Range (3V to 60V) n 1.5A, 60V Internal Switch n 20000:1 External PWM Dimming at 100Hz n ±2% LED Current and Output Voltage Regulation n PMOS Switch Driver for PWM Dimming n LED Short/Open Protection and Indication n Constant Voltage and Constant Current Regulation n Adjustable 300kHz to 2MHz Switching Frequency n Adjustable 100Hz to 1kHz PWM Generator Frequency n Internal Spread Spectrum Frequency Modulation n Easy Synchronization to External Clock n Programmable VIN UVLO with Hysteresis n Available in 16-Lead MSOP Package n AEC-Q100 Qualified for Automotive

APPLICATIONS

n Display Backlighting n Automotive and Avionic Lighting

DESCRIPTION

The LT®3950 is a multitopology DC/DC converter designed specifically to drive high current LEDs. It contains a 1.5A, 60V DMOS switch and supports an external PWM dimming PMOS. Using an exponential scale to define duty ratio preserves dimming resolution across a wide range of LED current.