IR IRS2980 90-250VAC离线LED驱动解决方案
IR公司的IRS2980采用该公司的控制和高压技术,实现简单高性能调光LED驱动解决方案,包括调光LED驱动控制器,滞后电流调整,闭环LED电流调光控制,模拟/PWM调光输入,集成了高压稳压器,250uA微功耗起动,主要用在LED照明/CFL替代灯以及LED驱动模块.本文介绍了IRS2980主要特性,方框图, 应用电路图以及90-250VAC离线LED驱动器IRPLLED7参考设计主要特性,方框图, 电路图和材料清单.
The IRS2980 utilizes International Rectifier’s control and high-voltage technologies to realize a simple, high performance dimming LED driver solution. This solution is based on a hysteretic topology where the high frequency AC output current is controlled by adjusting the oscillator frequency and duty cycle.
IRS2980主要特性:
• Dimming LED driver controller
• Hysteretic Current Regulation
• Closed-loop LED current dimming control
• Analog/PWM Dimming Input
• Internal High Voltage Regulator
• Internal 15.6V zener clamp diode on Vcc
• Micropower startup (250μA)
• Latch immunity and ESD protection
LED驱动器系统特性:
• Single chip dimming solution
• Simple LED current dimming control method
• No external protection circuits required (fully internal)
• Easy to use for fast design cycle time
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