ZLED7520ZI1R ZMDI, ZLED7520ZI1R Datasheet

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Data Sheet Rev. 1.2 / August 2011 ZLED7520 High Current 40V LED Driver with Internal Switch ...

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... Evaluation Kit Physical Characteristics Operating temperature: -40° 105° C Switching frequency 1MHz ZLED7x20 Family Selection Matrix Product Max. Current Output ZLED7020 1.2A ZLED7320 1.0A ZLED7520 0.75A ZLED7720 0.35A For additional information on our ZLED driver family, visit www.zmdi.com/products/led-drivers/ Package SOT89-5 DFN-5 DFN-5 DFN-5 ...

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... Package SOT89-5 (Tape & Reel) DFN-5 (Tape & Reel) DFN-5 (Tape & Reel) DFN-5 (Tape & Reel) Kit Printed Circuit Board (PCB) LED_Drivers@zmdi.com ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +886.2.2377.8189 Fax +886.2.2377.8199 ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Contents 1 IC Characteristics .......................................................................................................................................................... 6 1.1 Absolute Maximum Ratings ................................................................................................................................... 6 1.2 Operating Conditions ............................................................................................................................................. 6 1.3 Electrical Parameters ............................................................................................................................................. 7 1.4 Typical Operation Graphs ...................................................................................................................................... 8 2 Circuit Description ...

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ZLED7520 High Current 40V LED Driver with Internal Switch List of Figures Figure 1.1 ZLED7x20 Supply Operating Current vs. Input Supply Voltage (V Figure 1.2 ZLED7x20 Supply Quiescent Shutdown Current vs. Input Supply Voltage (V Figure 1.3 Efficiency (%) vs. ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 1 IC Characteristics Note: Exceeding the maximum ratings given in this section could cause operation failure and/or cause permanent damage to the ZLED7x20. Exposure to these conditions for extended periods may ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 1.3 Electrical Parameters Test conditions for the following specifications are T Production testing of the chip is performed at 25° C unless otherwise stated. Functional operation of the chip and specified ...

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ZLED7520 High Current 40V LED Driver with Internal Switch No. PARAMETER 1.3.18 Propagation delay of internal comparator 1.3.19 Thermal shutdown temperature 1.3.20 Thermal shutdown hysteresis 1.4 Typical Operation Graphs The curves are valid for the typical application circuit and T ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 1.3 Efficiency (%) vs. Input Supply Voltage (V 1 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0 Figure 1.4 Efficiency vs. Input Supply Voltage (V 1 ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 1.5 Efficiency vs. Input Supply Voltage (V 1 0.95 0.9 0.85 0.8 0.75 0.7 0.65 0 Figure 1.6 Output Current Variation vs. Input Supply Voltage (V ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 1.7 Sense Voltage vs. Operating Temperature (Rs=0.10 , L1=47µH, V 99.4 99.2 99.0 98.8 98.6 98.4 98.2 98.0 97.8 -40 -30 -20 -10 0 Figure 1.8 Dimming Rate with 100Hz ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 1.9 LED Open-Circuit Protection (Rs=0.30 , L1=47µH, V © 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.2 Data Sheet All rights reserved. The material contained herein may not be reproduced, ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 2 Circuit Description 2.1 ZLED7x20 Overview The ZLED7x20 is a continuous-mode inductive step-down converter LED driver for driving single or multiple series-connected LEDs from a voltage input higher than the LED ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 2.4 Control of Output Current via a PWM Signal on the ADJ Pin An external pulse width modulation (PWM) control signal input on the ADJ pin can be used for brightness ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 3 Application Circuit Design 3.1 Applications The ZLED7x20 is designed for applications requiring features such as high-speed switching, variable brightness control, operation with voltages up to 40V, high efficiency, or protection ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 3.2 Basic ZLED7x20 Application Circuit with Output Current Controlled by External DC Voltage VDC Figure 3.3 Basic ZLED7x20 Application Circuit with ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 3.4 Basic ZLED7x20 Application Circuit with Output Current Controlled by External Microcontroller Signal 3.2 Thermal Considerations for Application Design 3.2.1 Temperature Effects of Load, Layout, and Component Selection Do not ...

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ZLED7520 High Current 40V LED Driver with Internal Switch To ensure stable output current, use a 1% accuracy resistor with adequate power tolerance and a good temperature characteristic for Rs. Table 3.1 Recommended Values for Sense Resistor Rs (ADJ pin ...

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ZLED7520 High Current 40V LED Driver with Internal Switch The inductance value has an equivalent effect on t the same reason, the inductance has no influence on the duty cycle, for which the relationship of the summed LED forward voltages ...

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ZLED7520 High Current 40V LED Driver with Internal Switch AVG MIN MAX MAX LX Where: Symbol I Average nominal LED string current assuming that the ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Example: For an application of 3 LEDs driven at 0.33A and supplied with 24VDC, a maximum ripple of 10% is allowed. The ZLED7x20 is operated at 150kHz with a duty cycle ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Do not lay out high-voltage traces near the ADJ pin because if the board is contaminated, leakage current can affect the ADJ pin voltage and cause unintended output current. To further ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 5 Pin Configuration and Package 5.1 SOT89-5 Package Pin-out and Dimensions for the ZLED7020 Figure 5.1 ZLED7020 Pin Configuration – SOT89-5 Package LX GND ADJ Table 5.1 ZLED7020 Pin Descriptions—SOT89-5 Package ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 5.2 SOT89-5 Package Dimensions for the ZLED7020 Dimension (mm) Symbol Min A 1.400 b 0.320 b1 0.360 c 0.350 D 4.400 D1 1.400 E 2.300 E1 3.940 ...

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ZLED7520 High Current 40V LED Driver with Internal Switch 5.2 DFN-5 Package Pin-out and Dimensions for the ZLED7320, ZLED7520 and ZLED7720 Figure 5.3 ZLED7320, ZLED7520 & ZLED7720 Pin Configuration — DFN-5 Package LX 1 GND 2 ADJ 3 Table 5.2 ...

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ZLED7520 High Current 40V LED Driver with Internal Switch Figure 5.4 DFN-5 (DFN4*4-05L) Package Dimensions for the ZLED7320, ZLED7520 & ZLED7720 B A Dimension (mm) Symbol Min A 3.95 B 3.95 C 0.70 D 0.37 e 0.75 f 2.17 g ...

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... SOT89-5 (Tape & Reel) DFN-5 (Tape & Reel) DFN-5 (Tape & Reel) DFN-5 (Tape & Reel) Kit Printed Circuit Board (PCB) Printed Circuit Board (PCB) LED_Drivers@zmdi.com ZMD FAR EAST, Ltd. 3F, No. 51, Sec. 2, Keelung Road 11052 Taipei Taiwan Phone +886.2.2377.8189 Fax +886 ...