基于iW3620的40W AC-DC LED驱动方案
基于iw3620的40w ac-dc led驱动方案
iw3620是iwatt公司的高性能ac/dc离线led驱动器，器件在高负载条件下工作在准谐振模式，以得到高的效率和各种内置的保护特性，降低emi，工作频率高达130khz，通用输入电压85 vac到 264 vac，可驱动40w 的led照明。本文介绍了iw3620主要特性以及典型应用电路。
iw3620：digital pwm constant current controller for ac/dc led driver
the iw3620 is a high performance ac/dc offline led driver which uses digital control technology to build peak current mode pwm flyback power supplies. the device operates in quasi-resonant mode at heavy load to provide high efficiency along with a number of key built-in protection features while minimizing the external component count, simplifying emi design and lowering the total bill of material cost. the iw3620 removes the need for secondary feedback circuitry while achieving excellent line and load regulation. it also eliminates the need for loop compensation components while maintaining stability over all operating conditions. pulse-by-pulse waveform analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load response. the built-in current limit function enables optimized transformer design in universal off-line applications over a wide input voltage range.
iw3620主要特性：
primary-side feedback eliminates opto-isolators and simplifies design
quasi-resonant operation for highest overall efficiency and low emi
up to 130 khz switching frequency enables small size
very tight led constant current regulation
built-in output constant-current control with primary-side feedback for led driver.
low start-up current (10 μa typical)
built-in soft start
built-in short circuit protection and output overvoltage protection
current sense resistor short protection
over-temperature protection
open circuit protection
universal input range from 85 vac to 264 vac
single-fault protection
small input bulk capacitor
long mtbf
high efficiency
iw3620应用：
solid state led lighting for incandescent, halogen, and fluorescent tube replacement
图1 iw3620典型应用电路
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iw3620是iwatt公司的高性能ac/dc离线led驱动器，器件在高负载条件下工作在准谐振模式，以得到高的效率和各种内置的保护特性，降低emi，工作频率高达130khz，通用输入电压85 vac到 264 vac，可驱动40w 的led照明。本文介绍了iw3620主要特性以及典型应用电路。
iw3620：digital pwm constant current controller for ac/dc led driver
the iw3620 is a high performance ac/dc offline led driver which uses digital control technology to build peak current mode pwm flyback power supplies. the device operates in quasi-resonant mode at heavy load to provide high efficiency along with a number of key built-in protection features while minimizing the external component count, simplifying emi design and lowering the total bill of material cost. the iw3620 removes the need for secondary feedback circuitry while achieving excellent line and load regulation. it also eliminates the need for loop compensation components while maintaining stability over all operating conditions. pulse-by-pulse waveform analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load response. the built-in current limit function enables optimized transformer design in universal off-line applications over a wide input voltage range.
iw3620主要特性：
primary-side feedback eliminates opto-isolators and simplifies design
quasi-resonant operation for highest overall efficiency and low emi
up to 130 khz switching frequency enables small size
very tight led constant current regulation
built-in output constant-current control with primary-side feedback for led driver.
low start-up current (10 μa typical)
built-in soft start
built-in short circuit protection and output overvoltage protection
current sense resistor short protection
over-temperature protection
open circuit protection
universal input range from 85 vac to 264 vac
single-fault protection
small input bulk capacitor
long mtbf
high efficiency
iw3620应用：
solid state led lighting for incandescent, halogen, and fluorescent tube replacement
图1 iw3620典型应用电路
MIMO技术在3G中的设计应用
Q3季度小米成功挤下苹果登上季军宝座，能否继续保持
人工智能引爆科技狂潮 各大厂商乘势落子机器人
5G时代下无线电的发射规则需要更改吗
Arm打造有1万亿台互连设备的世界 提供安全、灵活的物联网解决方案
基于iW3620的40W AC-DC LED驱动方案
逆变电路的原理是什么 逆变电路是如何工作的
盘点上海人工智能大会上的无人驾驶车
浅析小分子OLED的制造工艺及核心技术
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卫星移动通信现状与未来发展
BK7256-音视频SOC芯片功能应用简介
小米、OPPO、vivo三家公司针对零部件供应展开激烈斗争
智能工厂正当时 移动机器人先行早