The SD7800 is a single stage primary side regulation (PSR) power factor correction (PFC) controller, specially designed for flyback LED driver.
The SD7800 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.
The SD7800 adopts constant on time operation to achieve high power factor. 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 SD7800 provides completed protections such as input over voltage protection, input under voltage protection, LED short protection, LED open protection, cycle-by-cycle current limiting, and four section high temperature drop current and over temperature protection setting, etc.
PSR flyback topology
Boundary Conduction Mode
Constant on time control
Patented close-loop technology to prevent moisture and leakage, peripheral compensation network is unnecessary
Patented THD optimized technology without need of peripheral optimized network
VCC over voltage protection and VCC under voltage lockout
Input over voltage protection and input under voltage protection
Cycle-by-cycle current limiting and peak current compensation
LED short protection and LED open protection
Four section high temperature drop current setting
Four section over temperature protection setting
Product Name | Package form | Marking | Hazardous Substance Control | Packing Type | Remarks |
---|---|---|---|---|---|
SD7800 | SOP-8-225-1.27 | / | Halogen free | Tube | |
SD7800TR | SOP-8-225-1.27 | / | Halogen free | Tape & reel |
title | Types of | Size (KB) | date | Download the latest English version |
---|---|---|---|---|
SD7800 | 0 | 1970-01-01 | SD7800 Brief Datasheet |