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The SD682X is a single stage primary side regulation (PSR) power factor correction (PFC) controller, built-in high voltage power MOSFET, specially designed for flyback LED driver.

The Device adopts constant on time operation to achieve high power factor.

The SD682X provides accurate constant current control and operates in boundary conduction mode (BCM) with high efficiency. The Device adopts primary side regulation eliminating the opto-couple, secondary feedback control and loop compensation for reducing design and cost.

Constant TON is adopted for high PF; due to patented close-loop control technology pin COMP and peripheral compensation network are unnecessary, and output current will not be affected by moisture or leakage current; thanks to patented THD technology, low THD is obtained without optimized THD network in most applications.

The SD682X provides completed protections such as short LED protection, open LED protection and over temperature protection, etc.

Main feature

PSR flyback topology
Boundary Conduction Mode
Patented close-loop technology to prevent moisture and leakage, peripheral compensation network is unnecessary
Patented THD optimized technology without need of peripheral optimized network
Built-in 650V high voltage power MOSFET
Leading edge blanking
Constant on time controlVC
C under voltage lockout
Over temperature protection
Cycle by cycle current limiting
Peak current compensation
Short LED protection and Open LED protection

Ordering Information

Product Name	Package form	Marking	Hazardous Substance Control	Packing Type
SD6821S	SOP-7-225-1.27	/	Halogen free	Tube
SD6821STR	SOP-7-225-1.27	/	Halogen free	Tape & reel
SD6822S	SOP-7-225-1.27	/	Halogen free	Tube
SD6822STR	SOP-7-225-1.27	/	Halogen free	Tape & reel
SD6824S	SOP-7-225-1.27	/	Halogen free	Tube
SD6824STR	SOP-7-225-1.27	/	Halogen free	Tape & reel
SD6824D	DIP-7-300-2.54	/	Halogen free	Tube
SD6827D	DIP-7-300-2.54	/	Halogen free	Tube

Block Diagram

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Documents

title	Types of	Size (KB)	date	Download the latest English version
SD682X		0	2024-09-03	SD682X Brief Datasheet

Packages

SOP-7-225-1.27

DIP-7-300-2.54

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