Powerint LNK417EG 15W LED驱动解决方案

电子工程师 2019-03-18 485

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描述

关键词： LED驱动 , LNK417EG , Powerint

Powerint公司的15W LED驱动器采用LinkSwitchTM-PH LNK417EG器件和±3% CC调整,具有高效率,功率因素大于0.9,AC输入电压90V-265V,满足IEC 61000-4-5环形波, IEC 61000-3-2 Class C谐波和EN55015 B接触EMI要求,起动时间小于100ms.本文介绍了该驱动器主要特性和指标, 驱动器和子板电路图以及相应的材料清单与PCB布局图.

This document describes an isolated, power factor corrected, very high efficiency LED driver (non-dimmable) designed to drive an LED string of 30 V at a current of 500 mA(both nominal) from an input voltage range of 90 VAC to 265 VAC. The design employs a secondary side current feedback circuit to achieve less than 3% output current regulation over line and load. A reference board DER-284 was used with the secondary constant current regulation daughter board added to demonstrate how this technique can be used on and LinkSwitch-PH flyback design.

The LED driver uses a LNK417EG device from the LinkSwitch-PH family of ICs. This integrated controller and 725 V MOSFET dramatically reduces complexity and omponent count.

This document contains the LED driver specification, schematic, and bill of material,transformer documentation and typical performance characteristics.

15W LED驱动器主要特性:

≤3% output current regulation over line and load

Highly energy efficient

Efficiency ≥88% at 115 VAC and 230 VAC input

Low cost, low component count and small printed circuit board footprint solution

Frequency jitter for smaller, lower cost EMI filter components

Integrated protection and reliability features

Output open-circuit / output short-circuit protection with auto-recovery

Line input overvoltage shutdown extends voltage withstand during line faults.

Auto-recovering thermal shutdown with large hysteresis protects both components
and printed circuit board

No damage during brown-in or brown-out conditions

Meets IEC 61000-4-5 ring wave, IEC 61000-3-2 Class C harmonics and EN55015 B conducted EMI

Clean start-up – no output blinking

Fast start-up (<100 ms) – no perceptible delay