ZLED7730 Datasheet, PDF (3/22 Pages) List of Unclassifed Manufacturers – High Current 40V LED Driver with Switch Dimming

ZLED7x30 Datasheet
Contents
1 IC Characteristics .......................................................................................................................................................... 5
1.1 Absolute Maximum Ratings ................................................................................................................................... 5
1.2 Operating Conditions ............................................................................................................................................. 5
1.3 Electrical Parameters ............................................................................................................................................. 6
1.4 Typical Operation Graphs ...................................................................................................................................... 7
2 Circuit Description ....................................................................................................................................................... 12
2.1 ZLED7x30 Overview ............................................................................................................................................ 12
2.2 Control of Output Current via External Sense Resistor Rs .................................................................................. 12
2.3 Multi-Mode Switch Dimming................................................................................................................................. 12
2.4 ZLED7x30 Protection Features............................................................................................................................ 13
2.4.1 Thermal Shut-down Protection ..................................................................................................................... 13
2.4.2 LED Open-Load Protection........................................................................................................................... 13
3 Application Circuit Design............................................................................................................................................ 14
3.1 Applications.......................................................................................................................................................... 14
3.2 Thermal Considerations for Application Design ................................................................................................... 15
3.2.1 Temperature Effects of Load, Layout, and Component Selection................................................................. 15
3.2.2 Temperature Effects of Low Supply Voltage VIN ........................................................................................... 15
3.3 External Component Selection............................................................................................................................. 15
3.3.1 Sense Resistor Rs ........................................................................................................................................ 15
3.3.2 Inductor L1.................................................................................................................................................... 16
3.3.3 Bypass Capacitor C1 .................................................................................................................................... 17
3.3.4 De-bouncing Capacitor C2............................................................................................................................ 19
3.3.5 Capacitor C3 for Reducing Output Ripple..................................................................................................... 19
3.3.6 Diode D1....................................................................................................................................................... 19
3.4 Application Circuit Layout Requirements ............................................................................................................. 19
4 ESD Protection............................................................................................................................................................ 20
5 Pin Configuration and Package ................................................................................................................................... 20
6 Ordering Information ................................................................................................................................................... 21
7 Document Revision History ......................................................................................................................................... 22
© 2016 Integrated Device Technology, Inc.
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April 20, 2016