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ZXLD1374 Datasheet(PDF) 1 Page - Diodes Incorporated |
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ZXLD1374 Datasheet(HTML) 1 Page - Diodes Incorporated |
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1 / 35 page  ZXLD1374 ZXLD1374 Document number: DS35032 Rev. 1 - 2 Page 1 of 35 www.diodes.com October 2010 © Diodes Incorporated A Product Line of Diodes Incorporated 60V HIGH ACCURACY 1.5A BUCK/BOOST/BUCK-BOOST LED DRIVER CONVERTER Description The ZXLD1374 is an LED driver converter IC with integrated 1.5A low side switch to drive high current LEDs. It is a multi- topology converter 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 16 LEDs in series. The ZXLD1374 is a modified hysteretic converter using a patent pending control scheme providing high output current accuracy in all three topologies. High accuracy dimming is achieved through DC control and high frequency PWM control. The ZXLD1374 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-20EP ZXLD1374 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ADJ REF TADJ SHP STATUS SGND PGND PGND N/C N/C GI PWM FLAG ISM VIN VAUX LX LX N/C N/C Thermal Pad ZXLD1374 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ADJ REF TADJ SHP STATUS SGND PGND PGND N/C N/C GI PWM FLAG ISM VIN VAUX LX LX N/C N/C Thermal Pad Curve showing LED current vs. TLED Features • 0.5% typical output current accuracy • 6.3 to 60V operating voltage range • 1.5A integrated low side switch • LED driver supports Buck, Boost and Buck-boost topologies • 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 • Green mold compound (No Br, Sb) and RoHS compatible Typical Application Circuit |
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