ZLED7730ZI1R ZMDI, ZLED7730ZI1R Datasheet

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Data Sheet Rev. 1.2 / August 2011 ZLED7730 High Current 40V LED Driver with Switch Dimming ...

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... Physical Characteristics Operating temperature: -40° 105° C Switching frequency 1MHz SOP-8 package Product ZLED7030 ZLED7330 ZLED7530 a typical basic ZLED7730 For additional information on our ZLED driver family, visit www.zmdi.com/products/led-drivers Vin I SENSE ZLED7x30 C2 LX 0.1 F DIM1 GND DIM2 ZLED7x30 Family Selection Matrix Max ...

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... GND 7 Package SOP-8 (Tape & Reel) SOP-8 (Tape & Reel) SOP-8 (Tape & Reel) SOP-8 (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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ZLED7730 High Current 40V LED Driver with Switch Dimming 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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ZLED7730 High Current 40V LED Driver with Switch Dimming List of Figures Figure 1.1 ZLED7x30 Supply Operating Current vs. Input Supply Voltage (V Figure 1.2 Efficiency (%) vs. Input Supply Voltage (V Figure 1.3 Efficiency vs. Input Supply Voltage (V ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 1 IC Characteristics Note: Exceeding the maximum ratings given in this section could cause operation failure and/or cause permanent damage to the ZLED7x30. Exposure to these conditions for extended periods may ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 1.3 Electrical Parameters Except as noted, test conditions for the following specifications are T otherwise noted. Production testing of the chip is performed at 25° C unless otherwise stated. Functional operation ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming No. PARAMETER 1.3.17 Recommended output switch duty cycle range at f LXmax 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 ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 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 0.95 ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming Figure 1.5 Output Current Variation vs. Input Supply Voltage (V (Rs=0.15 , L1=47µH) 0.7 0.69 0.68 0.67 0.66 0.65 0.64 0.63 0.62 0.61 0 Figure 1.6 Sense ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming Figure 1.7 demonstrates a typical switch dimming waveform. Channel 1 (blue) is the supply voltage. Channel 4 (magenta) shows the output current at 100%, then 60%, and then 30%. Figure 1.7 ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming Figure 1.8 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, adapted, ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 2 Circuit Description 2.1 ZLED7x30 Overview The ZLED7x30 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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ZLED7730 High Current 40V LED Driver with Switch Dimming K = Current ratio to initial current (see section 1.3). X The input conditions on the DIM1 and DIM2 pins set the number of current levels and the current ratio relative ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 3 Application Circuit Design 3.1 Applications The ZLED7x30 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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ZLED7730 High Current 40V LED Driver with Switch Dimming Figure 3.3 ZLED7x30 Application Circuit using a Halogen Electronic Transformer to Operate with AC Line Supply 3.2 Thermal Considerations for Application Design 3.2.1 Temperature Effects of Load, Layout, and Component Selection ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 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 Nominal Average ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming 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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ZLED7730 High Current 40V LED Driver with Switch Dimming AVG MIN V V MAX MAX Where: Symbol I Average nominal LED string current assuming that the contribution of the IC ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming Example: For an application of 3 LEDs driven at 0.33A and supplied with 24VDC, a maximum ripple of 10% is allowed. The ZLED7x30 is operated at 150kHz with a duty cycle ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming Because Rs is typically a low value resistor important to consider the resistance of the traces in series with R as part of the total current sense resistance. Use ...

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ZLED7730 High Current 40V LED Driver with Switch Dimming SOP8 Package Dimensions Table 5.2 Package Dimensions SOP-8 Dimension Symbol Min A 1.350 A1 0.100 A2 1.450 Typical b 0.350 c 0.178 D 4.800 The SOP-8 package has a thermal resistance ...

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... Zentrum Mikroelektronik Dresden AG, Japan Office 2nd Floor, Shinbashi Tokyu Bldg. 4-21-3, Shinbashi, Minato-ku Tokyo, 105-0004 Japan +1 (608) 829-1987 Phone +81.3.6895.7410 +1 (631) 549-2882 Fax +81.3.6895.7301 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 . ...