Data Sheet Rev. 1.2 / August 2011 ZLED7530 High Current 40V LED Driver with Switch Dimming ZLED7530 High Current 40V LED Driver with Switch Dimming Features Brief Description Switch dimming with multiple levels The ZLED7x30 continuous-mode inductive step- Three modes for output level settings down converter family is one of our ZLED LED- Up to 0.75A output current control ICs. It is designed for applications requiring Internal 40V power switch high brightness and high current. The ZLED7x30 can efficiently drive a single LED or multiple Wide DC input voltage range 8.5 to 40 VDC series-connected LEDs from a voltage input higher Output current accuracy: 5% (typical) than the LED forward voltage (Vin = 8.5 to LED open-circuit protection 40VDC). It provides an adjustable output current Thermal shutdown protection (1.2A maximum), which is set via an external resistor and controlled by the ZLED7x30s Benefits integrated high-side output current-sensing circuit and high speed internal 40V power switch. Its low High efficiency: up to 98% conducting impedance ensures high system effi- Very few external components needed for ciency. operation The ZLED7x30 provides a switch dimming func- Adds switch dimming function to existing tion. It detects external switch action to adjust out- installation put current, allowing dimming functionality to be achieved without changing the original lighting sys- Available Support tem circuitry. Evaluation Kit The switch dimming is implemented in either two- level mode or three-level mode. The output current Physical Characteristics of every level and the total number of levels are Operating temperature: -40C to 105C customer selected by setting the corresponding input conditions of DIM1 and DIM2 pin. Switching frequency: up to 1MHz SOP-8 package The ZLED7x30 enables diverse industrial and consumer lighting applications requiring high driving currents, wide operating voltage range, ZLED7x30 Family Selection Matrix high efficiency, and variable brightness control. It Product Max. Current Output Package offers over-temperature and LED open-circuit ZLED7030 1.2A SOP-8 protection. The ZLED7x30 can also minimize bill- of-material costs because very few external ZLED7330 1.0A SOP-8 components are required for most applications. ZLED7530 0.75A SOP-8 Only a resistor, a diode, an inductor, and three capacitors are needed for a typical basic ZLED7730 0.35A SOP-8 application. For additional information on our ZLED driver ZLED7x30 Typical Application Circuit family, visit www.zmdi.com/products/led-drivers/ Rs Switch D1 Vs = 8.5 to 40 VDC (C3) LED Vin I SENSE String L1 33 to 220 H ZLED7x30 C1 C2 LX 220F 0.1F DIM1 GND/Floating GND/Floating GND DIM2 2011 Zentrum Mikroelektronik Dresden AG Rev. 1.2 All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.