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LT3519EMS LT3519IMS LT3519 - LED Driver with Integrated Schottky Diode

Features a3nd Benefits

 

• Up to 3000:1 True Color PWM™ Dimming
• Wide Input Voltage Range
• Operation from 3V to 30V
• Transient Protection to 40V
• Rail-to-Rail LED Current Sense from 0V to 45V
• 45V, 750mA Internal Switch
• Internal Schottky Diode
• Constant-Current and Constant-Voltage Regulation
• Boost, SEPIC, Buck-Boost Mode or Buck Mode Topology
• Open LED Protection and Open LED Status Pin
• Programmable Undervoltage Lockout with Hysteresis
• Fixed Frequency: 400kHz (LT3519), 1MHz (LT3519-1), 2.2MHz (LT3519-2)
• Internal Compensation
• CTRL Pin Provides Analog Dimming
• Low Shutdown Current: <1μA
• 16-Lead MSOP Package

 

 

Product details

 

The LT3519/LT3519-1/LT3519-2 are fixed frequency step-up DC/DC converters designed to drive LEDs. They feature an internal 45V, 750mA low side switch and Schottky diode. Combining a traditional voltage feedback and a unique rail-to-rail current sense feedback allows these converters to operate as a constant-voltage source or constant-current source. Internal compensation simplifies applications. These devices feature rail-to-rail LED current sense pins that provide the most flexibility in choosing a converter configuration to drive the LEDs. The LED current is externally programmable with a sense resistor. The external PWM provides up to 3000:1 PWM dimming and the CTRL input provides analog dimming.

 

 

Applications

 

• Automotive
• Industrial
• Constant Current Source
• Current Limited Constant Voltage Source

 

 

 

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