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HM9803 Datasheet(PDF) 1 Page - Shenzhen Huazhimei Semiconductor Co., Ltd |
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HM9803 Datasheet(HTML) 1 Page - Shenzhen Huazhimei Semiconductor Co., Ltd |
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1 / 7 page  80V 0.5A Switching Current Buck PFM LED Constant Current Driver Rev 1.2 1 Features n Wide 24V to 80V Input Voltage Range n 0.2V current sense voltage reference. n Directly drive 3~8 series 1W LED. n Excellent line and load regulation. n High efficiency up to 96%. n Internal optimize power HV-MOSFET. n Built in thermal shutdown function. n Built in UVLO function. n Built in current limiting function. n Built in LED open & short protection. n Built in soft-start circuit. n Available in SOIC-8 package. Applications n EBIKE LED Lighting n LED Lighting & LED LAMP n General purpose lighting General Description The HM9803 is a monolithic high voltage switching regulator with PFM that is specifically designed to operate from a 24V~80V DC supply. The HM9803 is a high efficiency LED driver switching regulator. The LED string is driven at DC constant current rather than constant voltage, thus providing constant current output and enhanced reliability. Figure1. Package Type of HM9803 Shenzhen H&M Semiconductor Co.Ltd http：//www.hmsemi.com |
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