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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LM3421 датащи(PDF) 1 Page - Texas Instruments |
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LM3421 датащи(HTML) 1 Page - Texas Instruments |
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1 / 65 page  LM3421, LM3421-Q1 LM3423, LM3423-Q1 www.ti.com SNVS574D – JULY 2008 – REVISED SEPTEMBER 2011 LM3421, LM3421Q1, LM3421Q0, LM3423, LM3423Q1, LM3423Q0 N-Channel Controllers for Constant Current LED Drivers Check for Samples: LM3421, LM3421-Q1, LM3423, LM3423-Q1 1 FEATURES DESCRIPTION The LM3421/23 are versatile high voltage N-channel 2 • LM3421Q1/LM3423Q1 are Automotive Grade MosFET controllers for LED drivers . They can be Products That are AEC-Q100 Grade 1 Qualified easily configured in buck, boost, buck-boost and (-40°C to +125°C Operating Junction SEPIC topologies. This flexibility, along with an input Temperature) and Similarly voltage rating of 75V, makes the LM3421/23 ideal for LM3421Q0/LM3423Q0 are AEC-Q100 Grade 0 illuminating LEDs in a large family of applications. Qualified (-40°C to +150°C Operating Junction Adjustable high-side current sense voltage allows for Temperature) tight regulation of the LED current with the highest • VIN Range From 4.5V to 75V efficiency possible. The LM3421/23 uses Predictive • High-Side Adjustable Current Sense Off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. • 2 Ω, 1A Peak MosFET Gate Driver This method of control eases the design of loop • Input Under-Voltage and Output Over-Voltage compensation while providing inherent input voltage Protection feed-forward compensation. • PWM and Analog Dimming The LM3421/23 devices include a high-voltage • Cycle-by-Cycle Current Limit startup regulator that operates over a wide input • Programmable Switching Frequency range of 4.5V to 75V. The internal PWM controller is designed for adjustable switching frequencies of up to • "Zero Current" Shutdown and Thermal 2.0 MHz, thus enabling compact solutions. Additional Shutdown features include "zero current" shutdown, analog • LED Output Status Flag (LM3423/23Q1/23Q0 dimming, PWM dimming, over-voltage protection, Only) under-voltage lock-out, cycle-by-cycle current limit, and thermal shutdown. • Fault Status Flag and Timer (LM3423/23Q1/23Q0 Only) The LM3423 also includes an LED output status flag, a fault flag, a programmable fault timer, and a logic APPLICATIONS input to select the polarity of the dimming output driver. • LED Drivers - Buck, Boost, Buck-Boost, and SEPIC The LM3421Q1/23Q1 are AEC-Q100 grade 1 qualified and LM3421Q0/23Q0 are AEC-Q100 grade • Indoor and Outdoor Area SSL 0 qualified. • Automotive • General Illumination • Constant-Current Regulators 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2011, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
Аналогичный номер детали - LM3421 |
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Аналогичное описание - LM3421 |
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