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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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RT4539AWSC датащи(PDF) 1 Page - Richtek Technology Corporation |
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RT4539AWSC датащи(HTML) 1 Page - Richtek Technology Corporation |
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1 / 39 page  RT4539A Copyright © 2022 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation DS4539A-01 December 2022 www.richtek.com 1 39V High Efficiency Boost Converter with I2C Controlled 6-CH LED Driver General Description The RT4539A is a high efficiency driver for white LEDs. It is suitable for single/two cell battery input to drive LED light bars which contains six strings in parallel. The internal current sinks support a maximum of ±2% current mismatching for excellent brightness uniformity in each string of LEDs. To provide enough headroom for current sink operation, the Boost converter monitors the minimum voltage of the feedback pins and regulates an optimized output voltage for power efficiency. The RT4539A has a wide input voltage operating range from 2.7V to 24V and contains I2C interface for controlling the dimming mode, operating frequency and the LED current. The internal 250mΩ, 39V power switch with current-mode control provides over-current protection. The switching frequency of the RT4539A is adjustable from 300kHz to 1.6MHz, which allows flexibility between efficiency and component size. The RT4539A are available in the WL-CSP-20B 1.71x2.371 (BSC) and WQFN-24L 4x4 packages. Applications TabletandNotebook Backlight Features Wide Operating Input Voltage: 2.7V to 24V High Output Voltage: Up to39V Programmable Channel Current: 10.04mA to 35mA Channel Current Regulation with Accuracy ±3% and Matching ±2% DimmingControls Direct PWM Dimming up to 20kHz and Minimum On-Time to 400ns PWM to Analog Dimming up to 20kHz with 9-bit Resolution PWM Pin and/or I2C-Controlled with Programmable Linear@12 bits or Exponential@11 bits Brightness Control Digitally Advanced Sloping for Smooth Dimming Adjustable Dimming Mode Control. Adjustable Advanced Brightness Control. Adjustable Switching Frequency of Boost Converter from 300kHz to 1.6MHz. PFM function for High Efficiency at Light Load Programmable Spread Spectrum Scheme and Edge Rate Control Minimize Switching Noise and Improve EMI Performance Protections LED Strings Open Detection LED Strings Short Protection Programmable Current Limit of Boost. Programmable Over-Voltage Protection Level Over-Temperature Protection Integrated Memory by MTP 20-Ball WL-CSP, with pitch 0.4mm and 24-Lead WQFN Packages Simplified Application Circuit FB1 FB2 FB3 VIN VOUT FB4 L1 D1 RT4539A : : : : : : : : : : : : COUT1 LX GND : : : : : : FB5 FB6 PGND C1 EN SCL SDA MCU VIN CIN PWM R1 CCP VCP COUT2 |
Аналогичный номер детали - RT4539AWSC |
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Аналогичное описание - RT4539AWSC |
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