ZLED7015 1.0MHz Boost Converter with Internal 35V Switch Brief Description Features Integrated 35V power switch Wide input range: 6VDC to 30VDC The ZLED7015, one of our ZLED family of LED control ICs, is a constant current boost converter with an internal high-power 35V switch. It is optimal for driving multiple white LEDs connected in series so that the LED current is uniform for better brightness and color control. It can also drive devices that require a constant voltage and is capable of operating efficiently with voltage supplies ranging from 6VDC to 30VDC. It is ideal for diverse lighting applications requiring low supply voltages such as SELV applications. Typically, smaller, less expensive external components can be used since the ZLED7015 switches at 1.0MHz (typical). Over-temperature protection Over-voltage (open LED string) protection adjusted via external resistor divider Under-voltage lockout ensures reliable circuit operation Control of output current during start-up via internal “soft-start” Switching frequency: 1.0MHz Single pin on/off or brightness control via PWM, microcontroller, or DC voltage control signal input MSOP-10 package The ZLED7015 output current is adjustable via an external current sense resistor RS connected from the FB pin to ground. Benefits High efficiency: up to 95% efficiency Few small, low-profile components needed for operation The ZLED7015 improves efficiency and minimizes power losses in the current setting resistor RS by use of an internal 0.3V feedback reference voltage. Small form-factor package Available Support Dimming can be controlled using a pulse-width modulation (PWM) waveform or a DC voltage applied to the FB pin. Evaluation Kit Physical Characteristics The ZLED7015 provides a “soft-start” function to prevent excessive in-rush current on start-up and ensures a controlled rise of the output voltage. Operating temperature: -40°C to 85°C RoHS-compliant Over-voltage protection is adjustable via external resistors R1 and R2. ZLED7015 Typical Application Circuit VOUT VIN = 6 to 30 VDC L1 D1 REN R1 CIN RVDD C1 EN C2 LX OVP VDD R2 CVDD ZLED7015 PGND LED String FB COVP COUT VP AGND CVP RS © 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 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. ZLED7015 1.0MHz Boost Converter with Internal 35V Switch ZLED7015 Block Diagram 6 to 30 VDC VIN L1 RVDD CIN ZLED7015 9 REN CVDD C1 D1 2 LDO C2 VP VDD Bias & Reference Bandgap COUT CVP 7 – FB 10 R + LX RS VREF Oscillator S n LED Ramp Gen ∑ 4 R1 Q COVP R2 Slope Compensation Shutdown RS EN Current Sense OVP 6 Over-Voltage Protection Thermal Protection Current Limit PGND 1 AGND 3, 5 Typical Applications Low-Voltage Retro-fit Lighting Architectural/Building Lighting MR16 Lights Replacement Tubes SELV Lighting LED Backlighting Signage and Outdoor Lighting General Purpose Low-Voltage Industrial and Consumer Applications Ordering Information Product Sales Code Description Package ZLED7015-ZI1R ZLED7015 – 1.0MHz Boost Converter with Internal 35V Switch MSOP-10 (Tape & Reel) ZLED7015KIT-E1 ZLED7015-E1 Evaluation Board, 1 ZLED-PCB10, and 5 ZLED7015 ICs Kit Sales and Further Information www.zmdi.com [email protected] Zentrum Mikroelektronik Dresden AG Grenzstrasse 28 01109 Dresden Germany ZMD America, Inc. 275 South 5th Avenue Pocatello, ID 83201 USA 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 Zentrum Mikroelektronik Dresden AG, Korean Office POSCO Centre Building West Tower, 11th Floor 892 Daechi, 4-Dong, Kangnam-Gu Seoul, 135-777 Korea Phone +49.351.8822.7.533 Fax +49.351.8822.8.7533 Phone +1.208.478.7200 Fax +1.208.478.7200 Phone +81.3.6895.7410 Fax +81.3.6895.7301 Phone +886.2.2377.8189 Fax +886.2.2377.8199 Phone +82.2.559.0660 Fax +82.2.559.0700 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. © 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.00 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.