Maxim Integrated MAX16841

Description

The MAX16841 is an LED driver for AC line (100V, 120V, 220V, and 230V AC) input lamps. It features proprietary control of the input current that allows lamps to dim smoothly from full to zero light intensity, while providingactive power factor correction (PFC). It is a very flexible product that can be used in isolated (e.g., flyback) and nonisolated (e.g., buck) configurations. The conventional use of an optocoupler in isolated configurations can beavoided in MAX16841-based designs.The constant frequency-control technique of the device allows maximization of the conversion efficiency at both low and high AC line by operating at the conduction mode that minimizes total conduction and switching losses.The device can be configured for universal input (90V to 264V AC) dimmable applications, allowing the design of an LED lamp that can be operated and dimmed worldwide.This device can be used without electrolytic capacitors, thus maximizing the lamp lifetime. In this case, the LED current is a rectified sinusoid with a frequency that is twice the AC line frequency.The device also features thermal shutdown, current limit, open LED protection, and VCC undervoltage lockout. The MAX16841 is available in an 8-pin SO package and operates over the -40NC to +125NC temperature range.

Features

• Smooth Dimming with Leading-Edge (Triac) and Trailing-Edge Dimmers
• Active Power Factor Correction
• Nonisolated (e.g., Buck) and Isolated (e.g., Flyback) Topologies
• Universal 90V to 264V AC Input Range
• Constant Frequency-Control Scheme Maximizes Efficiency at High and Low AC Line Voltage
• Constant Power Control with No Need for Optocouplers
• Very-Low Quiescent Current
• Output Open and Short Protection
• Thermal Shutdown
• Available in an 8-Pin SO Package

Typical applications

• Universal Input LED Retrofit Lamps
• Retrofit LED Lamps with Triac Dimming
• Residential LED Lighting
• Industrial and Commercial Lighting

More information

• Datasheet
• IC product information