EC4329 Datasheet, PDF (1/7 Pages) E-CMOS Corporation – Offiline Step-down Buck LED Driver IC with APFC

Offiline Step-down Buck LED Driver IC with APFC
EC4329
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.
Typical Application
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
E-CMOS Corp. (www.ecmos.com.tw)
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