ZLED7020KIT-D1 Demo Kit Description Important Notice Restrictions in Use IDTs ZLED7020KIT-D1 Demo Kit hardware is designed for ZLED7020 demonstration, evaluation, laboratory setup, and module development only. The ZLED7020KIT-D1 Demo Kit hardware must not be used for module production or production test setups. Disclaimer IDT shall not be liable for any damages arising out of defects resulting from (i) delivered hard- and software (ii) non-observance of instructions contained in this manual and in any other documentation provided to user, or (iii) misuse, abuse, use under abnormal conditions or alteration by anyone other than IDT. To the extent permitted by law, IDT hereby expressly disclaims and user expressly waives any and all warranties, whether express, implied or statutory, including, without limitation, implied warranties of merchantability and of fitness for a particular purpose, statutory warranty of non-infringement and any other warranty that may arise by reason of usage of trade, custom or course of dealing. Contents 1 Kit Contents ................................................................................................................................................... 2 2 Kit Description ............................................................................................................................................... 2 2.1. Overview ................................................................................................................................................. 2 2.2. Power Supply.......................................................................................................................................... 2 2.3. Interface .................................................................................................................................................. 3 2.4. Key Demo board features and benefits .................................................................................................. 3 2.5. Circuit Operation ..................................................................................................................................... 5 2.6. Schematic Diagram ................................................................................................................................ 5 3 Ordering Information ..................................................................................................................................... 6 4 Related Documents ....................................................................................................................................... 6 5 Glossary ........................................................................................................................................................ 6 6 Document Revision History ........................................................................................................................... 6 List of Figures Figure 2.1 ZLED7020KIT-D1 Demo Board (Top View) .................................................................................... 3 Figure 2.2 ZLED7020KIT-D1 Schematic Diagram ............................................................................................ 5 List of Tables Table 2.1 DC Input Voltages ............................................................................................................................ 4 2016 Integrated Device Technology, Inc. 1 May 10, 2016 ZLED7020KIT-D1 Demo Kit Description 1 Kit Contents The ZLED7020KIT-D1 Demo Kit consists of the following parts: ZLED7020-D1 Demo Board VX.x Five ZLED7020 samples, SOT89-5 package ZLED7020KIT-D1 Demo Kit Start-up Information Kit Disclaimer The ZLED7020KIT-D1 Demo Kit is fully assembled and ready for immediate operation. 2 Kit Description 2.1. Overview The ZLED7020KIT-D1 Demo Kit provides a quick and easy method for evaluating the ZLED7020 within its basic application circuit. Reading the ZLED7020 Data Sheet before using the Demo Kit is recommended for understanding the operation of the ZLED7020 and the Demo Board. The ZLED7020 continuous-mode inductive step-down converter is one of ZLED family of high brightness, high current LED control ICs. It can efficiently drive a single LED or multiple series-connected LEDs from a voltage input higher than the LED voltage (Vin = 6 to 40 VDC). It provides an adjustable output current (1.2A maximum), which is set via an external resistor and controlled by the ZLED7020s integrated high-side output current-sensing circuit. An external control signal (DC voltage or a PWM waveform) on the ADJ pin can be used to linearly adjust the output for either continuous or gated-output current. The output can be turned off by applying a voltage lower than 0.2V to the ADJ pin, which puts the ZLED7020 in a low-current standby state. The ZLED7020 IC is designed for LED current drive applications of up to 1.2A. The main features of ZLED7020 driver are: Up to 1.2A output current. Wide input voltage range: 6V to 40V. Internal 40V 1.2A NDMOS switch. High efficiency ( > 90% possible). Up to 1MHz switching frequency. The Demo Board contains a standard 4-pin terminal connector to allow the user to easily connect and supply a LEDs board. The Demo Board also has two LED power pads (LED+ and LED-) to provide more flexibility in supplying a power LED or LED string. A 33uH shielded inductor was chosen to set nominal frequency around 300kHz.The shielded inductor is selected to minimize radiated EMI. The layout with any switching regulator is crucial to minimize radiated EMI. This reference design keeps the critical track lengths to a minimum. Ground has been maximized around critical areas. Figure 2.1 shows the top view of the populated kit PCB. 2.2. Power Supply The board requires basically 12V, or above for LED strings, AC or DC power supply. Referring to circuit schematics at Figure 2.2, the shortcut solder joints could be used at R1 and R3, utilizing a zero ohm resistor in order to enable the pure DC operation. Care has to be taken in this case, since the system is not reverse polarity protected 2016 Integrated Device Technology, Inc. 2 May 10, 2016