Cirrus CS1680调光7W LED驱动器解决方案

Cirrus公司的CS1680是低压照明的可调光LED驱动器,具有最好的变压器兼容性,调光特性以及高达83%的效率,最低调光量5%,输出电压12V/15V,主要用在MR16灯和所有的12VAC/DC低压照明应用.本文介绍了CS1680主要特性,框图和应用电路,以及CRD1680-7W 7 W参考设计主要特性,电路图,材料清单和PCB设计图.
The CS1680 is a cascade boost-buck dimmable LEDdriver for the 12V halogen lamp-replacement market.
The CS1680 uses a Cirrus Logic proprietary intelligentdigital control that provides exceptional single-lamp andmulti-lamp transformer compatibility for non-dimmer systemsand dimmer systems paired with electronic andmagnetic low-voltage transformers.
The CS1680 integrates a continuous conduction mode(CCM) boost converter that provides transformer compatibilityand dimmer compatibility. An adaptive digitalalgorithm controls the boost stage and dimmer compatibilityoperation mode to enable flicker-free operationdown to 5% output current with leading-edge and trailing-edge dimmers.
CS1680主要特性:

• Best-in-class Transformer Compatibility
- Magnetic Transformers
- Electronic Transformers
• Best-in-class Dimmer Compatibility
- Leading-edge (TRIAC) Dimmers
- Trailing-edge Dimmers
• High Efficiency
- Up to 80% for CS1680-00 Applications
- Up to 83% for CS1680-02 Applications
• Flicker-free Dimming
• 5% Minimum Dimming Level
• Cascade Boost-buck Topology with Constant-currentOutput
- CS1680-00 Output Voltage 15V
- CS1680-02 Output Voltage 21V
• Fast Startup
• Tight LED Current Regulation: Better than ±10%
• >0.9 Power Factor on Magnetic Transformers
• Soft Start
• Protections:
-Output Open/Short
- Boost Overvoltage
-Overcurrent Detection
- External Overtemperature Using NTC
CS1680应用:

• MR16 Lamps
• All 12VAC/VDC Low-voltage Lighting Applications

图1.CS1680框图

图2.CS1680...