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ZXLD1374 датащи(PDF) 32 Page - Diodes Incorporated |
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ZXLD1374 датащи(HTML) 32 Page - Diodes Incorporated |
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32 / 37 page ![]() ZXLD1374 60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER WITH AEC-Q100 ZXLD1374 Document number: DS35032 Rev. 2 - 2 32 of 37 www.diodes.com March 2011 © Diodes Incorporated A Product Line of Diodes Incorporated Applications Examples 1.5A Buck LED driver In this application example, ZXLD1374 is connected as a Buck LED driver with schematic and parts list shown below. The LED driver is able to deliver 1.5A of LED current to single or multiple LEDs in series with input voltage ranged from 10V to 50V. In order to achieve high efficiency under high LED current, Super Barrier Rectifier (SBR) with low forward voltage is used as free wheeling rectifier. With only a few extra components, the ZXLD1374 LED driver is able to deliver LED power of greater than 60W. This is suitable for applications which require high LED power likes high power down lighting, wall washer, automotive LED lighting etc. Figure 52. Application circuit of 1.5A Buck LED driver Bill of Material Ref No. Value Part No. Manufacturer U1 60V 1.5A LED driver ZXLD1374 Diodes Inc D1 100V 3A SBR SBR3U100 Diodes Inc L1 33µH 4.2A 744770933 Wurth Electronik C1 100pF 50V SMD 0805/0603 Generic C2 1µF 100V X7R SMD1206 Generic C3 C4 C5 2.2µF 100V X7R SMD1210 Generic R1 R2 300m Ω 1% SMD1206 Generic R3 4.7 Ω SMD1206 Generic Typical Performance Efficiency vs Input Voltage 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% 10 15 20 25 30 35 40 45 50 Input Voltage (V) 1 LED VF=3.4V 3 LED VF=9.8V 5 LED VF=16V Figure 53. Efficiency LED Current vs Input Voltage 0 400 800 1200 1600 10 15 20 25 30 35 40 45 50 Input Voltage (V) 1 LED VF=3.4V 3 LED VF=9.8V 5 LED VF=16V Figure 54. Line regulation |
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