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AF1821 - Primary Side Control Offline LED Controller

Download the AF1821 datasheet PDF. This datasheet also covers the AF1821-Alfa variant, as both devices belong to the same primary side control offline led controller family and are provided as variant models within a single manufacturer datasheet.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AF1821-Alfa-MOS.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AF1821
Manufacturer Alfa-MOS
File Size 1.03 MB
Description Primary Side Control Offline LED Controller
Datasheet download datasheet AF1821 Datasheet

General Description

The AF1821 is a TRIAC dimmable, primary-side-control offline LED lighting controller which can achieve high power factor and flicker-free TRIAC dimming output LED current for an isolate lighting application in a single stage converter.

Overview

Alfa-MOS Technology AF1821 TRIAC Dimming, Primary Side Control Offline LED Controller with Active PFC.

Key Features

  • over-voltage protection, short-circuit protection, cycle-by-cycle current limit, VCC UVLO and auto-restart over temperature protection. The AF1821 is available in a small SOP-8 package. Features Real Current Control Without Secondaryfeedback Circuit Flicker-free Phase-controlled TRIAC Dimming Accurate Constant Current Output Boundary Conduction Mode Operation Ultra-low (10µA) Start Up Current Low (1mA) Quiescent Current Input UVLO Cycle-by-cycle Current Limit Over-voltage Protection Short-circu.

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