General Description

The SIC976XD are built-in HV start-up and IC power supply circuit, main line power up

constant current LED regulators with high current accuracy which applies to single stage

step-down power factor corrected LED drivers. 600V power MOSFET is integrated, which can

significantly simplify the design of LED lighting system.

High accuracy of output current is achieved by sampling the output current directly. Quasi

Resonant (QR) Buck topology reduces the switching losses and largely increases the efficiency.

The SIC976XD are supplied from the main line, the VDD power supply resistors and power

feedback circuits from LED chips are not needed, save cost and help for assemble efficiency.

The SIC976XD have multi-protection functions which largely enhance the safety and

reliability of the system, including VDD over-voltage protection, VDD UVLO, short-circuit

protection, LED open protection, cycle-by-cycle current limit and over-temperature protection.

The SIC9762D available in SOP-7 package, SIC9763D available in SOP-7 & DIP-7package,

SIC9764D available in DIP-7 package, SIC9767D available in SOP-7 package.

特性 Features

·Active PFC for High power factor and low THD

·±3% LED output current accuracy

·Built-in HV start-up and IC power supply circuit

·600V high voltage MOSFET integrated

·Quasi-Resonant (QR) Buck topology

·System efficiency up to 95%

·Ultra low start up & operating current

·Cycle-by-cycle current limit

·LED short protection

·LED open protection

·Over-temperature protection