Cirrus-logic AN400 Manual de usuario descargar pdf

Cirrus Logic, Inc.

http://www.cirrus.com

CRD1615W-11W-36V Schematic

AN400

Design Example of CS1615

for 11W Dimmer-Compatible SSL Circuit

Features

• Supports Cirrus Logic CS1615

• Quasi-resonant Buck-Boost Topology with Constant-

current Output

• Flicker-free Dimming

• Line Voltage: 108VAC -132VAC

• Rated Input Power: 11W

• Rated Output Power: 9.25W

• Efficiency: ~87.5% at 250mA for 12xLEDs 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 CS1615, the CRD1615-11W-36V. The CRD1615-

11W-36V reference design demonstrates the performance

of the CS1615 resonant mode AC/DC LED driver IC with a

250mA output driving

12xLEDs 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

AN400

1 2 3 4 5 6 ... 14 15

Indice de contenidos

Pagina 1 - Design Example of CS1615

Pagina 2 - Risk of Electric Shock

AN400105. THERMAL IMAGINGFigure 6. Top ThermalFigure 7. Bottom Thermal

Pagina 3 - 1. INTRODUCTION

AN400116. DIMMER COMPATIBILITYA19 Lamp with a CS1615A (120V/60Hz)Date 11/20/2013 Power Factor1,40.934Vendor Cirrus Logic EN55015 Compliant (Y/N) NInpu

Pagina 4 - 2. SCHEMATIC

AN400121. 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

AN400137. PERFORMANCE PLOTS 0.20.210.220.230.240.250.26108 110 112 114 116 118 120 122 124 126 128 130 132Output Current (A) Line Voltage (V) Figure 8

Pagina 6 - 4. BOARD LAYOUT

AN40014 0.80.820.840.860.880.90.920.940.960.981108 110 112 114 116 118 120 122 124 126 128 130 132Power Factor Link Voltage (V) Figure 10. Power Fact

Pagina 7 - Figure 3. Bottom Silkscreen

AN400158. REVISION HISTORYRevision Date ChangesRD1 AUG 2014 Preliminary release

Pagina 8 - Figure 4. Top Routing

AN4002Contacting 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

AN40031. INTRODUCTIONThe CS1615 is a 120VAC quasi-resonant buck-boost mode dimmable LED controller IC. The CS1615 uses a digitalcontrol algorithm that

Pagina 10 - 5. THERMAL IMAGING

AN40042. SCHEMATICFigure 1. Schematic

Pagina 11 - 6. DIMMER COMPATIBILITY

AN40053. BILL OF MATERIALS Ref Description Manufacturer Part Number ManufacturerBR1 DIODE RECT 200V 0.8A NPB MINIDIP HD02-T DIODES INCC1 CAP FILM 0.0

Pagina 12

AN40064. BOARD LAYOUTFigure 2. Top Silkscreen

Pagina 13 - 7. PERFORMANCE PLOTS

AN4007Figure 3. Bottom Silkscreen

Pagina 14 - Power Factor

AN4008Figure 4. Top Routing

Pagina 15 - 8. REVISION HISTORY

AN4009Figure 5. Bottom Routing