사용자 설명서 (LM3404HVEVAL/NOPB)차례FEATURES1APPLICATIONS1DESCRIPTION1Typical Application1Connection Diagrams2ABSOLUTE MAXIMUM RATINGS(LM3404)3RECOMMENDED OPERATING CONDITIONS (LM3404)3ABSOLUTE MAXIMUM RATINGS (LM3404HV)4RECOMMENDED OPERATING CONDITIONS (LM3404HV)4ELECTRICAL CHARACTERISTICS5LM34045LM3404HV5LM3404/LM3404HV5TYPICAL PERFORMANCE CHARACTERISTICS7BLOCK DIAGRAM10APPLICATION INFORMATION11THEORY OF OPERATION11CONTROLLED ON-TIME OVERVIEW11AVERAGE LED CURRENT ACCURACY12MAXIMUM OUTPUT VOLTAGE12MINIMUM OUTPUT VOLTAGE12HIGH VOLTAGE BIAS REGULATOR12INTERNAL MOSFET AND DRIVER13FAST SHUTDOWN FOR PWM DIMMING13PEAK CURRENT LIMIT13OVER-VOLTAGE/OVER-CURRENT COMPARATOR13LOW POWER SHUTDOWN14THERMAL SHUTDOWN14DESIGN CONSIDERATIONS15SWITCHING FREQUENCY15LED RIPPLE CURRENT15BUCK CONVERTERS WITHOUT OUTPUT CAPACITORS15BUCK CONVERTERS WITH OUTPUT CAPACITORS15INPUT CAPACITORS16RECIRCULATING DIODE17LED CURRENT DURING DIM MODE17TRANSIENT PROTECTION CONSIDERATIONS18CS PIN PROTECTION19CS PIN PROTECTION WITH OVP20VIN PIN PROTECTION22GENERAL COMMENTS REGARDING OTHER PINS23Design Example 1: LM340423RON and tON24OUTPUT INDUCTOR24USING AN OUTPUT CAPACITOR25RSNS25INPUT CAPACITOR25RECIRCULATING DIODE26CB AND CF26EFFICIENCY26Design Example 2: LM3404HV27RON and tON27OUTPUT INDUCTOR27USING AN OUTPUT CAPACITOR28RSNS29INPUT CAPACITOR29RECIRCULATING DIODE29CB AND CF29EFFICIENCY29Layout Considerations30COMPACT LAYOUT30GROUND PLANE AND SHAPE ROUTING30CURRENT SENSING31REMOTE LED ARRAYS31Revision History32크기: 1.28메가바이트페이지: 39Language: English매뉴얼 열기