General Description
The LD7831 is a high power factor primary side Flyback LED controller with HV start-up, specially designed for LED lighting. The LD7831 provides constant current (CC) operation requiring neither photo-coupler nor secondary control circuit. It minimizes the components counts in a SOP-7. Those make it easy to design for cost- effective applications.
With HV start-up technology, high power factor and TM control, the start-up time and resistor loss could be minimized efficiently. The circuit can easily achieve PF>0.90 to meet most of the international standard requirements.

FEATUREs
● High Voltage (700V) Startup Circuit
● High Power Factor Flyback Primary Side PFC
   Controller
● High Efficiency Transition Mode Operation
● 28V VCC OVP (VCC Over Voltage Protection)
● OCP (Cycle by Cycle Current Limiting)
● SCP (Output Short Protection)
● OTP (Over Temperature Protection)
● CS Short Protection
● Adjustable Output OVP
● 250/-500mA Driving Capability
● Internal OTP Function

APPLICATIONs
● LED Power Supply
● LED Light Bulb/Tube