General Description

The EC4329 is a high precision non-isolated buck driver with APFC, specially designed for universal input offline
constant current LED lighting, and reach out low THD.
Operating in critical conduction mode, the power MOSFET switching loss is reduced and the inductor is fully utilized.
Withthe fewest external components, and cutting- edge circuit design, output ability can be precisely controlled in
the most competitive method of all kinds.
EC4329 adopts floating ground structure, inductor current is hence sensed during the whole switching cycle, which
generates precise output current, line and load regulation when being applied in system.
EC4329 also features full protection function to enhance Reliability on board, including LED Open/ Short circuit
Protection, OVP/ UVP/ OTP( Self- reduce)/ OCP Current Sensing Open protection, Soft start and so on.
EC4329 performed in compact SOT23-6 package.

Features

◆ High Power Factor, ultra- low THD
◆ Valley Switch, High Efficiency, LOW EMI
◆ Soft Start
◆ Thermal Regulation Compensation
◆ ±3% Output Current Accuracy
◆ Universal AC input
◆ Auto Induction Compensate
◆ Auto Output Voltage adaption
◆ Full Protection Features: ( LED O/S CKT; OTP OCP; OVP/UVP)
◆ Auto Recovery to default
◆ Fewest external components required on board

Applications

◆ LED High Brightness Lighting
◆ Light Bulb, Light Tube