ECQ-E2224JF(2012) View Datasheet(PDF) - Infineon Technologies

Part Name

Description

Manufacturer

ECQ-E2224JF
(Rev.:2012)

Phase Cut Dimmable Non-isolated Buck Converter for LED Retrofit Bulb with ICL8002G & CoolMOS™ 600V C6

Infineon Technologies 

AN-EVALLED-ICL8002G-B2

Phase Cut Dimmable Non-isolated Buck Converter for LED Retrofit Bulb with ICL8002G & CoolMOS™ 600V C6

1

Introduction

ICL8002G is a quasi-resonant PWM controller specially designed for high efficient offline LED driving

application. It can be configured for different topologies such as flyback and buck converter. This document

illustrates the ICL8002G in dimmable LED bulb application using the non-isolated buck topology. The ICL8002G

IC’s quasi-resonant operation mode, precise cycle-by-cycle peak current control, integrated PFC and phase-cut

dimming control, and various protections make it an outstanding system solution for dimmable LED bulbs.

The ICL8002G non-isolated bulb demo board shows high efficiency and power factor with single stage design.

Damping and bleeder circuit blocks were added to achieve high compatibility with wide range of dimmers. The

output current is well regulated over a wide input and output voltage range. Its compact form factor makes it

easy to fit into many LED lamp shapes and sizes.

Other available demo boards for ICL8001G/ICL8002G are designed with isolated flyback topology. If galvanic

isolation is not required, a non-isolated buck topology can be used with the following advantages:

• Lower PCBA BOM cost due to less costly power inductor and lower voltage rated MOSFET

• Smaller form factor due to more compact size of the power inductor

This demo board can be ordered with the sales code EVALLED-ICL8002G-B2.

2

List of Features

• Smooth dimming curve with high dimmer compatibility

• High efficiency (>86%)

• High power factor (>0.95) with low THD (<20%)

• Small form factor (40mm x 20mm x 25mm)

• Quasi-resonant floating buck operation

• Precise cycle-by-cycle peak current control

• Integrated start-up power cell and built-in digital soft-start

• Comprehensive protection functions

• Low system BOM cost for dimmable bulbs

3

Technical Specification

Table 1 lists the performance specification of the EVALLED-ICL8002G-B2 demo board.

Table 1 Design Specification

Parameter

Value

Unit

Input voltage

90-132

V

Line frequency

50/60

Hz

Input power*

12

W

Output power*

10

W

Output voltage

30-38

V

Output current

300

mA

Power factor

> 0.95

THD**

< 20%

Efficiency**

86%

*: Actual input and output power depends on the output

voltage **: Measured at 120Vac with output of 34.3V/295mA

Application Note

5

Version 1.1, 2012-08-03

Share Link: