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LM3424 Datasheet(PDF) 1 Page - Texas Instruments |
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LM3424 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 69 page  SS TGAIN OVP LM3424 nDIM VIN GND TSENSE TREF DDRV VS DAP GATE EN COMP VIN CSH RT/SYNC IS HSN SLOPE VCC HSP 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 ILED PWM TEMP Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM3424, LM3424-Q1 SNVS603C – AUGUST 2009 – REVISED AUGUST 2015 LM3424/-Q1 Constant Current N-Channel Controller with Thermal Foldback for Driving LEDs 1 Features 3 Description The LM3424 is a versatile high voltage N-channel 1 • LM3424-Q1 is an Automotive Grade Product That MOSFET controller for LED drivers. It can be easily is AEC-Q100 Grade 1 Qualified configured in buck, boost, buck-boost and SEPIC • VIN Range from 4.5V to 75V topologies. In addition, the LM3424 includes a • High-Side Adjustable Current Sense thermal foldback feature for temperature management of the LEDs. This flexibility, along with • 2- Ω, 1-A Peak MOSFET Gate Driver an input voltage rating of 75 V, makes the LM3424 • Input Undervoltage and Output Overvoltage ideal for illuminating LEDs in a large family of Protection applications. • PWM and Analog Dimming Adjustable high-side current sense allows for tight • Cycle-by-Cycle Current Limit regulation of the LED current with the highest • Programmable Softstart and Slope Compensation efficiency possible. The LM3424 uses standard peak current-mode control providing inherent input voltage • Programmable, Synchronizable Switching feed-forward compensation for better noise immunity. Frequency It is designed to provide accurate thermal foldback • Programmable Thermal Foldback with a programmable foldback breakpoint and slope. • Precision Voltage Reference In addition, a 2.45V reference is provided. • Low Power Shutdown and Thermal Shutdown The LM3424 includes a high-voltage startup regulator that operates over a wide input range of 4.5 V to 75 2 Applications V. The internal PWM controller is designed for adjustable switching frequencies of up to 2.0 MHz • LED Drivers - Buck, Boost, Buck-Boost, and and external synchronization is possible. The SEPIC controller is capable of high speed PWM dimming • Indoor and Outdoor Area SSL and analog dimming. • Automotive Device Information(1) • General Illumination PART NUMBER PACKAGE BODY SIZE (NOM) • Constant-Current Regulators LM3424 HTSSOP (20) 6.50 mm x 4.40 mm Typical Boost Application Circuit LM3424-Q1 (1) For all available packages, see the orderable addendum at the end of the datasheet. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
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