Cirrus-logic AN398 Uživatelský manuál stáhnout pdf

Cirrus Logic, Inc.

http://www.cirrus.com

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AN398

Design Example of CS1610

for 15W Dimmer-Compatible SSL Circuit

Features

• Supports Cirrus Logic CS1610

• Quasi-resonant Flyback Topology with Constant-

current Output

• Flicker-free Dimming

• Line Voltage 108VAC - 132VAC

• Rated Input Power: 15W

• Rated Output Power: 13.2W

• Efficiency: ~81% at 470mA for 9xLEDs 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 CS1610, the CRD1610-15W-27V. The CRD1610-

15W-27V reference design demonstrates the performance

of the CS1610 resonant mode AC/DC LED driver IC with a

470mA output driving

9xLEDs 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

AN398

1 2 3 4 5 6 ... 14 15

Shrnutí obsahu

Strany 1 - Design Example of CS1610

Strany 2 - Risk of Electric Shock

AN398105. THERMAL IMAGINGFigure 6. Top ThermalFigure 7. Bottom Thermal

Strany 3 - 1. INTRODUCTION

AN398116. DIMMER COMPATIBILITYA19 Lamp with a CS1615A (120V/60Hz)Date 9/10/2012 Power Factor1,40.934Vendor Cirrus Logic EN55015 Compliant (Y/N) NInput

Strany 4 - 2. SCHEMATIC

AN398121. Tested at nominal input voltage, nominal input frequency and without a dimmer after soaking for 15 minutes2. Average3. Peak-to-peak4. Measur

Strany 5 - 3. BILL OF MATERIALS

AN398136. PERFORMANCE PLOTS 0.40.410.420.430.440.450.460.470.480.490.5108 120 132Output Current (A) Line Voltage (V) Figure 8. Output Current vs. Lin

Strany 6 - 4. BOARD LAYOUT

AN39814Figure 10. Power Factor vs. Line Voltage 0.60.650.70.750.80.850.90.951108 120 132Power Factor Line Voltage (V) Figure 11. Input Power vs Dim

Strany 7 - Figure 3. Bottom Silkscreen

AN398157. REVISION HISTORYRevision Date ChangesRD1 AUG 2014 Preliminary release

Strany 8 - Figure 4. Top Routing

AN3982Contacting Cirrus Logic SupportFor all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to y

Strany 9 - Figure 5. Bottom Routing

AN39831. INTRODUCTIONThe CS1610 is a 120VAC quasi-resonant flyback mode dimmable LED controller IC. The CS1610 uses a digital con-trol algorithm that

Strany 10 - 5. THERMAL IMAGING

AN39842. SCHEMATICFigure 1. Schematic

Strany 11 - 6. DIMMER COMPATIBILITY

AN39853. BILL OF MATERIALS Table 1: Bill of Materials

Strany 12

AN39864. BOARD LAYOUTFigure 2. Top Silkscreen

Strany 13 - Efficiency (%)

AN3987Figure 3. Bottom Silkscreen

Strany 14 - Real Power

AN3988Figure 4. Top Routing