ZLED7010 40V LED Driver with Temperature Compensation Brief Description Features Capable of 95% efficiency* Operates in continuous mode with a wide input range from 6 VDC to 40 VDC Integrated 40V power switch One-pin on/off or brightness control via DC voltage or PWM control signal Switching frequency: ≤ 1MHz Dimming rate: 1200:1 (typical) Output current accuracy: 5% (typical) Built-in temperature compensation and open-circuit protection for LEDs Thermal shutdown protection for the ZLED7010 Very few external components needed for operation Broad range of applications: outputs up to ≤750mA SOP-8 package The ZLED7010, one of our ZLED Family of LED control ICs, is an inductive step-down converter that is optimal for driving a single LED or multiple LEDs (connected in series) from a voltage source greater than the voltage rating of the LED. The ZLED7010 operates in continuous mode. Capable of operating efficiently with voltage supplies ranging from 6 VDC to 40 VDC, it is ideal for low-voltage lighting applications. The ZLED7010 minimizes current consumption by remaining in a low-current standby mode (output is off) until a voltage of ≥0.3V is applied to the ADJI pin. In operating mode, the ZLED7010 can source LEDs with an output current of ≤ 750mA (≤ 30 watts of output power*) that is externally adjustable. The ZLED7010’s integrated output switch and high-side current sensing circuit use an external resistor to adjust the average output current. LED control is achieved via an external control signal at the ZLED7010’s ADJI pin, implemented as a pulse-width modulation (PWM) waveform for a gated output current or a DC voltage for continuous current. The ZLED7010 provides a temperature compensation function for maintaining stable and reliable LED operation. LED over-temperature conditions are detected via a negative temperature coefficient (NTC) thermistor mounted close to the LEDs. If an over-temperature condition occurs, the NTC value reaches the value of a threshold resistor and the IC reduces LED current automatically. After the circuit recovers to a safe temperature, current returns to the set value. ADJO outputs and ADJI inputs of consecutive ICs can be interconnected as a driver chain deploying the temperature compensation information of the predecessor. This reduces the part count because only the first stage of the series requires an NTC. 6 to 40 VDC Application Examples Illuminated LED signs and other displays LED traffic and street lighting (low-voltage) Architectural LED lighting, including low-voltage applications for buildings Halogen replacement LEDs (low-voltage) LED flood-lighting LED backlighting General purpose exterior and interior LED lighting, including applications requiring low-voltage General purpose low-voltage industrial applications ZLED7010 Application Circuit RS VS D1 1 C1 4 1μF 3 C2 100nF R2 50kΩ 6 n LED 2 ISENSE VIN RNTC RTH ZLED7010 ADJI GND R3 NTC L1 LX ADJO 8 47μH 5 7 * See section 2.3 in the data-sheet for details © 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1 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. ZLED7010 40V LED Driver with Temperature Compensation SOP-8 Package Dimensions and Pin Assignments Symbol A A1 A2 b c D Dimension (mm) Min 1.350 0.100 Max 1.750 0.250 1.450 Typical 0.350 0.178 4.800 0.490 0.250 5.000 Symbol E E1 e L θ Dimension (mm, except θ) Min Max 3.800 4.000 5.800 6.240 1.270 Typical 0.400 1.270 0° 8° Ordering Information Product Sales Code Description ZLED7010-ZI1R ZLED7010 – 40V LED Driver with Temperature Compensation Package ZLED7010KIT-D1 ZLED7010 Demo Board with LED on Cool Body 12VAC/VDC Kit ZLED-PCB1 Test PCB with one 3W white HB-LED, cascadable to 1 multiple LED string Printed Circuit Board ZLED-PCB2 10 unpopulated test PCBs for modular LED string with footprints of 9 common HB-LED types Printed Circuit Board Sales and Further Information www.zmdi.com Zentrum Mikroelektronik Dresden AG (ZMD AG) Zentrum Mikroelektronik Dresden AG, Japan Office ZMD America, Inc. Grenzstrasse 28 01109 Dresden Germany 8413 Excelsior Drive Suite 200 Madison, WI 53717 USA Phone +49 (0)351.8822.7.533 Fax +49(0)351.8822.8.7533 Phone +1 (608) 829-1987 Fax +1 (631) 549-2882 SOP8 (Tape & Reel) [email protected] 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan Phone +81.3.6895.7410 Fax +81.3.6895.7301 ZMD Far East, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +886.2.2377.8189 Fax +886.2.2377.8199 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. © 2010 Zentrum Mikroelektronik Dresden AG — Rev. 1.1 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.