IRPLCFL4 International Rectifier, IRPLCFL4 Datasheet

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IRPLCFL4

Manufacturer Part Number
IRPLCFL4
Description
IC BALLAST DIMMING CFL 3-WAY
Manufacturer
International Rectifier
Datasheet

Specifications of IRPLCFL4

Main Purpose
Lighting, Ballast Control
Utilized Ic / Part
IR2156
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Secondary Attributes
-
Embedded
-
Primary Attributes
-
Other names
*IRPLCFL4
Not recommended for new designs - please refer to IRPLCFL8U
TOPICS COVERED
Introduction
The 3 way dimming system widely adopted in the US with conventional filament lamps consists of a
light bulb that has a modified Edison screw type base which allows 3 connections to be made to a
special lamp socket that also has 3 connections.
International Rectifier
Live
Standard Edison Screw Base
Introduction
Existing Ballast Solutions
Functional Description
Protection Circuits
Neutral
A 3 Way Dimming CFL Ballast
233 Kansas Street, El Segundo, CA 90245 USA
Bill of Materials
By Peter Green
Live 1 Live 2
3 Way Dimming Edison Screw
Output Inductor Design
Layout Issues
Component Selection
Lamp Preheating
Neutral
Base
IRPLCFL4
Rev.C

Related parts for IRPLCFL4

IRPLCFL4 Summary of contents

Page 1

... Edison screw type base which allows 3 connections to be made to a special lamp socket that also has 3 connections. Standard Edison Screw Base Live Neutral IRPLCFL4 233 Kansas Street, El Segundo, CA 90245 USA By Peter Green Layout Issues Component Selection ...

Page 2

... Low DC bus (150V) / high frequency 2. High DC bus (300V) / high frequency 3. High DC bus (300V) / low frequency 2 3 Way Dimming Light Bulb 40W Filament ….. minimum output …... medium output …… maximum output IRPLCFL4 60W Filament www.irf.com ...

Page 3

... MOSFET failure. The conclusion is that the approach to design described above is unable to provide a reliable ballast. Solution A completely new approach has been developed that overcomes all of the above limitations based around the popular and versatile IR2156 ballast control I.C. www.irf.com IRPLCFL4 3 ...

Page 4

... Lamp Current 4 Ballast / Lamp Operating Characteristic Ballast Running Frequency IRPLCFL4 www.irf.com ...

Page 5

... This also compensates for any tolerances in the components of the circuit or the lamp. Reference www.irf.com Regulated Lamp Current Control System VCO & DRIVER + Lamp Arc Current - IRPLCFL4 5 ...

Page 6

... The opamp is configured as a non-inverting DC amplifier with a fixed gain so the output will give a higher voltage when both lives are connected and a lower voltage when only one is connected. In this way it is possible by selecting the values of R4, R5, R6 and R11, to achieve any three light levels that may be required. 6 IRPLCFL4 www.irf.com ...

Page 7

... C11 integrated CFL these could also be left out and pin 10 CS could be connected directly to COM. www.irf.com Circuit Schematic R3 D8 R15 7 IC2 C20 VCC VDC R16 R17 R19 RPH CPH COM R18 C10 C11 IC1b IRPLCFL4 R13 Q1 L3a L3 C15 C13 D9 C17 Q2 C14 D10 R9 C16 C18 R21 L3b D5 C19 R20 D6 C12 R14 7 ...

Page 8

... The connecting track from C5 to the MOSFET half-bridge should also be kept short and as far away from the error amplifier as possible. C14 should be close to IC1 and IC2 with short tracks to the positive supply pins to provide maximum decoupling. All tracks carrying HF currents in the output section should be kept away from IC1 and IC2 and associated components. 8 IRPLCFL4 www.irf.com ...

Page 9

... The number of turns in the auxiliary cathode windings of the output inductor L2 should be chosen to provide suffi- cient preheat. In designs for ballasts with integral lamps the shutdown pin can be grounded so that the inductor may saturate without shutting down the circuit. www.irf.com IRPLCFL4 9 ...

Page 10

... Diode SMD DL4148 Small Signal Diode SMD DF10S Bridge SMD RL-5480-3-2700 Filter Inductor HM00-01741 Inductor 2.2mH EF20 ECQ-E2104KB 100nF 200V EEU-EB2V220 22uF 200V 105C Electrolytic ECE-AIVKG220 22uF 35V 105C Electrolytic IRPLCFL4 Reference IC1 IC2 Q1,2 D8 D5,6,7,9,10 D1-4 L1,L2 L3 C1,2 C3,4 C7 www.irf.com ...

Page 11

... ERJ-8GEYJ103V 10K 1206 ERJ-8GEYJ105V 1M 1206 ERJ-8GEYJ333V 33K 1206 ERJ-8GEYJ102V 1K 1206 ERJ-8GEYJ154V 150K 1206 0.5R 0.25W Axial ERJ-8GEYJ220V 22R 1206 Data and specifications subject to change without notice. IRPLCFL4 Reference C8,20 C9 C10 C11 C5,6,19 C17,18 C13 C14 C15 C16 C12 R1,2 R7,15 ...

Page 12

... REVISION HISTORY FOR REFERENCE DESIGN IRPLCFL4 Date Change August 8, 2008 Added “Not recommended for new designs – please refer to IRPLCFL8U 12 IRPLCFL4 www.irf.com ...

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