ZLED7x20 Family High Current 40V LED Driver with Internal Switch Brief Description Benefits The ZLED7x20 continuous-mode inductive stepdown converter family is part of our line of LEDcontrol ICs. It is designed for applications requiring high brightness and high current. It can efficiently drive a single LED or multiple series-connected LEDs from a voltage input higher than the LED forward voltage: Vin = 6 to 40 VDC. It provides an adjustable output current ≤1.2A, which is set via an external resistor and controlled by the ZLED7x20’s integrated high-side output current-sensing circuit and high speed internal 40V power switch. An external control signal, which can be a DC voltage, PWM, or microcontroller-generated waveform, on the ADJ pin can also be used to linearly adjust a continuous output current or to control a gated output current. High efficiency: up to 98% Single pin on/off and brightness control using DC voltage or PWM Very few external components needed for operation Footprint compatible with our ZLED7000 depending on the application. Available Support Evaluation Kit Physical Characteristics Operating junction temperature: -40°C to 125°C Switching frequency: up to 1MHz The output can be turned off by applying a voltage lower than 0.2V to the ADJ pin, which puts the ZLED7x20 in a low-current standby state. ZLED7x20 Family Selection Matrix The ZLED7x20 enables diverse industrial and consumer lighting applications requiring high driving currents, wide operating voltage range, high efficiency, and variable brightness control. It offers over-temperature and LED open-circuit protection. The ZLED7x20 can also minimize bill-ofmaterial costs because very few external components are required for most applications. Only a resistor, a diode, an inductor, and three capacitors are needed for a typical basic application. Product Max. Current Output Package ZLED7020 1.2A SOT89-5 ZLED7320 1.0A DFN-5 ZLED7520 0.75A DFN-5 ZLED7720 0.35A DFN-5 ZLED7x20 Typical Application Circuit Features Rs Vs = 6 to 40 VDC Up to 1.2A output current D1 Internal 40V power switch Wide DC input voltage range 6 to 40 VDC Output current accuracy: 3% (typical) Vin Dimming ratio: 1200:1 LED open-circuit protection Thermal shutdown protection (C1) C2 0.1µF LX GND LED String L1 ZLED7x20 ADJ (C3) I SENSE 33µH to 220µH For more information, contact ZMDI via [email protected]. © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.40 — June 11, 2014. 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. ZLED7x20 Family High Current 40V LED Driver with Internal Switch ZLED7x20 Block Diagram 6 to 40 VDC Rs VS D1 4 ISENSE (C1) C2 VCC 0.1µF 5 VIN (C3) n LED VDDA Power Supply, Oscillator, and UnderVoltage Detection (UV) VDDD 1 ISENSE LX VIN Power MOS UV ISENSE And Driver POR VREF SD L1 33µH to 220µH DR SD 500kΩ 3 Shutdown ADJ ISENSE ZLED7X20 POR Trim LX GND 2 Typical Applications Illuminated LED signs and other displays Interior/exterior LED lighting LED street and traffic lighting (low voltage) MR16 LED spot lights Architecture/building LED lighting Retrofit LED lighting fixtures LED backlighting General purpose industrial and consumer LED applications Ordering Information Product Code Description ZLED7020-ZI1R ZLED7020 – High Current (1200mA) 40V LED Driver with Internal Switch SOT89-5 (Tape & Reel) ZLED7320-ZI1R ZLED7320 – High Current (1000mA) 40V LED Driver with Internal Switch DFN-5 (Tape & Reel) ZLED7520-ZI1R ZLED7520 – High Current (750mA) 40V LED Driver with Internal Switch DFN-5 (Tape & Reel) ZLED7720-ZI1R ZLED7720 – High Current (350mA) 40V LED Driver with Internal Switch DFN-5 (Tape & Reel) ZLED7020KIT-D1 ZLED7020-D1 Demo Board, 1 ZLED-PCB8 and 5 ZLED7020 ICs Kit ZLED-PCB8 Test PCB with a 5W white high brightness (HB) LED, cascadable to a multiple LED string Printed Circuit Board (PCB) Sales and Further Information Package www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Global Headquarters Grenzstrasse 28 01109 Dresden, Germany ZMD America, Inc. 1525 McCarthy Blvd., #212 Milpitas, CA 95035-7453 USA Central Office: Phone +49.351.8822.306 Fax +49.351.8822.337 USA Phone 1.855.275.9634 Phone +1.408.883.6310 Fax +1.408.883.6358 European Technical Support Phone +49.351.8822.7.772 Fax +49.351.8822.87.772 DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer, licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty, tort (including negligence), strict liability, or otherwise. European Sales (Stuttgart) Phone +49.711.674517.55 Fax +49.711.674517.87955 Zentrum Mikroelektronik Dresden AG, Japan Office 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Zentrum Mikroelektronik Dresden AG, Korea Office U-space 1 Building 11th Floor, Unit JA-1102 670 Sampyeong-dong Bundang-gu, Seongnam-si Gyeonggi-do, 463-400 Korea Phone +82.31.950.7679 Fax +82.504.841.3026 © 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.40 — June 11, 2014. 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.