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AF1820 - Without electrolyte capacitor Offline LED Controller

Download the AF1820 datasheet PDF. This datasheet also covers the AF1820-Alfa variant, as both devices belong to the same without electrolyte capacitor offline led controller family and are provided as variant models within a single manufacturer datasheet.

General Description

The AF1820 is a TRIAC and multi-steps dimmable simplest current injected topology control IC for isolation LED driver that had some characteristics, the first is operating without electrolytic capacitors which is necessary for the DC power supply structure, the second is operating without photo coup

Key Features

  • Without electrolyte capacitor No photo coupler PWM frequency jittering to reduce EMI noise HV Start-up circuit eliminates outer resistor and reduce input power consumption Constant current (RMS) for LED Phase-controlled TRIAC Dimming Multi-steps dimming Integrated Over Current Protection (OCP) Embedded Leading Edge Blanking (LEB) Integrated Over Voltage Protection (OVP) Integrated Thermal Shutdown (TSD) System efficiency >90% in simulation System PF >0.9 in simulation.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AF1820-Alfa-MOS.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AF1820
Manufacturer Alfa-MOS
File Size 836.28 KB
Description Without electrolyte capacitor Offline LED Controller
Datasheet download datasheet AF1820 Datasheet

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Other Datasheets by Alfa-MOS

Part Number Description
AF1821 Primary Side Control Offline LED Controller
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AF1860 Step-Down LED Driver
AF1880 Linear LED Driver
AF1117 Low Dropout Positive Voltage Regulator

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Alfa-MOS Technology AF1820 Dimmable, Without electrolyte capacitor Offline LED Controller with Active PFC General Description The AF1820 is a TRIAC and multi-steps dimmable simplest current injected topology control IC for isolation LED driver that had some characteristics, the first is operating without electrolytic capacitors which is necessary for the DC power supply structure, the second is operating without photo coupler and the last is enhancing the power factor to larger than 90%. Eliminating the electrolytic capacitor in the LED lighting driver could fulfill the long life time and high efficiency of the lamps. Eliminating the photo coupler in the light load LED lighting driver could save the power which is larger than 0.75W for 500mA LED current. (reference voltage 2.5v × 0.