Cirrus-logic AN399 Manual de usuario descargar pdf

Cirrus Logic, Inc.

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AN399

Design Example of CS1611

for 11W Dimmer-Compatible SSL Circuit

Features

• Supports Cirrus Logic CS1611

• Quasi-resonant Flyback Topology with Constant-

current Output

• Flicker-free Dimming

• Line Voltage: 207VAC - 223VAC

• Rated Input Power: 11W

• Rated Output Power: 9W

• Efficiency: ~83% at 300mA for 10xLEDs in Series

• Low Component Count

General Description

This application note provides an example of a Solid State

Lighting (SSL) LED lamp circuit designed using Cirrus

Logic’s CS1611, the CRD1611-11W-30V. The CRD1611-

11W-30V reference design demonstrates the performance

of the CS1611 resonant mode AC/DC LED driver IC with a

300mA output driving

10xLEDs in series

. It offers best-in-

class dimmer compatibility and minimum dimming

performance with leading-edge, trailing-edge, and digital

dimmers. The form factor is targeted to fit into many LED

bulb applications (A19-type, PAR).

AUG‘14

AN399

1 2 3 4 5 6 ... 14 15

Indice de contenidos

Pagina 1 - Design Example of CS1611

Pagina 2 - Risk of Electric Shock

AN399105. THERMAL IMAGINGFigure 6. Top ThermalFigure 7. Bottom Thermal

Pagina 3 - 1. INTRODUCTION

AN399116. DIMMER COMPATIBILITYA19 Lamp with a CS1611 (230V/50Hz)Date 8/3/2011 Power Factor1,40.934Vendor Cirrus Logic EN55015 Compliant (Y/N) NInput V

Pagina 4 - 2. SCHEMATIC

AN399121. Tested at nominal input voltage, nominal input frequency and without a dimmer after soaking for 15 minutes2. Average3. Peak-to-peak4. Measur

Pagina 5 - 3. BILL OF MATERIALS

AN399137. PERFORMANCE PLOTS 0.250.270.290.310.330.35210 230 250Output Current (A) Line Voltage (V) Figure 8. Output Current vs. Line Voltage 75%80%85

Pagina 6 - 4. BOARD LAYOUT

AN39914 0.80.820.840.860.880.90.920.940.960.981210 230 250Power Factor Line Voltage (V) Figure 10. Power Factor vs. Line Voltage

Pagina 7 - Figure 3. Bottom Silkscreen

AN399158. REVISION HISTORYRevision Date ChangesRD1 AUG 2014 Preliminary release

Pagina 8 - Figure 4. Top Routing

AN3992Contacting Cirrus Logic SupportFor all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to y

Pagina 9 - Figure 5. Bottom Routing

AN39931. INTRODUCTIONThe CS1611 is a 230VAC quasi-resonant flyback mode dimmable LED controller IC. The CS1611 uses a digital con-trol algorithm that

Pagina 10 - 5. THERMAL IMAGING

AN39942. SCHEMATICFigure 1. Schematic$5(9 '(6&5,37,21 '$7(,1,7,$/5(/($6(&8);5%67$8;,$&&/$036*1'628

Pagina 11 - 6. DIMMER COMPATIBILITY

AN39953. BILL OF MATERIALS Table 1: Bill of Materials

Pagina 12

AN39964. BOARD LAYOUTFigure 2. Top Silkscreen

Pagina 13 - 7. PERFORMANCE PLOTS

AN3997Figure 3. Bottom Silkscreen

Pagina 14 - Power Factor

AN3998Figure 4. Top Routing