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ZXLD1370 Datasheet(PDF) 1 Page - Diodes Incorporated |
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ZXLD1370 Datasheet(HTML) 1 Page - Diodes Incorporated |
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1 / 33 page  ZXLD1370 ZXLD1370 Document number: DS32165 Rev. 2 - 2 1 of 33 www.diodes.com May 2010 © Diodes Incorporated A Product Line of Diodes Incorporated 60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER Description The ZXLD1370 is an LED driver controller IC for driving external MOSFETs to drive high current LEDs. It is a multi- topology controller enabling it to efficiently control the current through series connected LEDs. The multi-topology enables it to operate in buck, boost and buck-boost configurations. The 60V capability coupled with its multi-topology capability enables it to be used in a wide range of applications and drive in excess of 15 LEDs in series. The ZXLD1370 is a modified hysteretic controller using a patent pending control scheme providing high output current accuracy in all three modes of operation. High accuracy dimming is achieved through DC control and high frequency PWM control. The ZXLD1370 uses two pins for fault diagnosis. A flag output highlights a fault, while the multi-level status pin gives further information on the exact fault. Pin Assignments TSSOP-16 EP Curve showing LED current vs. TLED Features • 0.5% typical output current accuracy • 6 to 60V operating voltage range • LED driver supports Buck, Boost and Buck-boost • configurations • Wide dynamic range dimming o 20:1 DC dimming o 1000:1 dimming range at 500Hz • Up to 1MHz switching • High temperature control of LED current using TADJ Typical Application Circuit Buck-boost diagram utilizing thermistor and Tadj |
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