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LM3414MR Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM3414MR Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 25 page VIN LX DIM FS PGND IADJ GND VCC * DAP connect to GND D1 L1 GND Iout = 1A LM3414/14HV RFS RIADJ Vin GND 4.5V ± 42 VDC (LM3414) CIN PWM dimming signal CVCC GND GND 4.5V ± 65 VDC (LM3414HV) LM3414, LM3414HV www.ti.com SNVS678E – JUNE 2010 – REVISED MAY 2013 1A 60W Common Anode Capable Constant Current Buck LED Driver Requires No External Current Sensing Resistor Check for Samples: LM3414, LM3414HV 1 FEATURES DESCRIPTION The LM3414 and LM3414HV are 1A 60W (see Note 2 • Support LED Power up to 60W (see Note under below) common anode capable constant current buck Description): 18x 3W HBLEDs LED drivers. They are exceptionally suitable to drive • Requires NO External Current Sensing single string of 3W HBLED with up to 96% efficiency. Resistor They accept input voltages from 4.5VDC to 65VDC and deliver up to 1A average LED current with ±3% • ±3% LED Current Accuracy accuracy. The integrated low-side N-channel power • Up to 96% Efficiency MOSFET and current sensing element realize simple • High Contrast Ratio (Minimum Dimming and low component count circuitry as no Current Pulse Width <10 µS) bootstrapping capacitor and external current sensing resistor are required. An external small-signal resistor • Integrated Low-Side N-Channel MOSFET to ground provides very fine LED current adjustment, • Adjustable Constant LED Current From 350mA analog dimming as well as thermal fold-back to 1000mA functions. • Support Analog Dimming and Thermal Fold- Constant switching frequency operation eases EMI. Back No external loop compensation network is needed. • Wide Input Voltage Range: The proprietary Pulse-Level-Modulation (PLM) control – 4.5V to 42V (LM3414) method benefits in high conversion efficiency and true average LED current regulation. Fast response time – 4.5V to 65V (LM3414HV) realizes fine LED current pulse fulfilling the 240 Hz • Constant Switching Frequency Adjustable 256-step dimming resolution requirement for general from 250 kHz to 1000 kHz lighting. • Thermal Shutdown Protection The LM3414 and LM3414HV are available in SOIC-8 • Power Enhanced SOIC-8 or 3mm x 3mm and 3mm x 3mm WSON-8 packages. WSON-8 Package Note: Thermal de-rating applies according to actual operation conditions APPLICATIONS • High Power LED Driver • Architectural Lighting, Office Troffer • Automotive Lighting • MR-16 LED Lamp Simplified Application Schematic 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 © 2010–2013, 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. |
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