Texas Instruments

Description

Last LED. Users Guide. SNVA193E January 2007 Revised April 2013. AN- 1545 LM3404 /LM3404HV Evaluation Board. 1. Introduction. The LM3404 /04HV is a buck regulator derived controlled current source designed to drive a series string. performance, fast dimming, and true constant LED current capabilities of the LM3402 and LM3404 devices. 2. Circuit Performance with LM3404 . This evaluation board (see Figure 1) uses the LM3404 to provide a constant forward current of LM3404 Driving a Seoul. Semi Zpower P4 1A LED -. RD-134. National Semiconductor. LM3404 . Chris Richardson. April 2007. 1.0 Design Specifications . Inputs. Output #1. VinMin=8.1V. Vout1=3.8V. VinMax=9.9V. Iout1=1A. 2.0 Design 1. Introduction. The LM3402/02HV and LM3404 /04HV are buck-regulator derived , controlled current sources designed to drive a series string of high power, high brightness LEDs (HBLEDs) such as the Luxeon K2 Emitter at forward currents ABSTRACT. The LM3404 /04HV is a buck-regulator designed for driving high powered LEDs at forward currents of up to 1.0A. LED drivers often experience thermal conditions that are extreme even by the standards of switching converters.