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Offline Controller for LED Lighting with Power Factor Correction

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GENERAL DESCRIPTION

The XC9404 series are LED lighting offline controllers that use PFM(Pulse Frequency Modulation) control and

have a Power Factor improvement function. The operating input voltage range is 85VAC to 270VAC, and the

current is controlled on the primary side without using a Opto-coupler or secondary side control circuit. Because

LED current fluctuations caused by input voltage fluctuations and LED voltage fluctuations can be suppressed, a

stable LED lighting power supply is obtained.

A high Power Factor and low THD are attained by synchronizing the input current with the input voltage, and

operation in DCM(Discontinuous Current Mode) makes it possible to achieve high efficiency. An internal

acceleration startup circuit enables the LED lighting to illuminate quickly.

Over Voltage Protection, Over Current Protection, UVLO and Thermal shutdown are provided as protective

functions to protect the LED lighting in the event of LED Open/Short-circuiting.

ETR32008-001

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FEATURES

Operating Voltage

Output Wattage

Power Factor / THD

Control Method

: 85VAC ~ 270VAC

: up to 50W

: Power Factor 0.95 or more

/ THD up to 10% attainable

: PFM control

Function

Protection Function

Package

Operating Ambient Temperature

Environmentally Friendly

: Opto-coupler free due to primary control

Built-in acceleration Start

Low Start up Current 20μA

: LED Open/Short protection

Over Voltage Protection

Over Current Protection

UVLO

Thermal shutdown

: SOP-8D

: -40℃ ~ +105 ℃

: EU RoHS Compliant, Pb Free

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TYPICAL APPLICATION CIRCUITS

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APPLICATIONS

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LED Bulb

・

LED spot Light

・

LED Tube

・

Street Light

・

Residential Lighting

・

Other applications with LED Lighting

85~270VAC

D1

D3

Q1

LED

C7

LT1

D2

R7

C5

CY1

Pri

Sec

AUX

Rg

RL2

ZD1

C1

R1

R2

BR1

CX1

+

R5

R6

L1

L2

R3

C2

C3

R4

RVdd1

C4

RL1

ZVS

ISEN

IC

VINS

Vsine

VDD

GND

GATE

Rs

RVdd2