Cirrus-logic AN402 Instrukcja Użytkownika Pobierz pdf

Cirrus Logic, Inc.

http://www.cirrus.com

CRD1615A-8W-125V Schematic

AN402

Design Example of CS1615A

for 8.5W Dimmer-Compatible SSL Circuit

Features

• Supports Cirrus Logic CS1615A

• Quasi-resonant Buck-Boost Topology with Constant-

current Output

• Flicker-free Dimming

• Line Voltage: 108VAC -132VAC

• Rated Input Power: 8.5W

• Rated Output Power: 7.83W

• Efficiency: ~88% at 58mA for 42xLEDs 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 CS1615A, the CRD1615A-8W-125V. The

CRD1615A-8W-125V reference design demonstrates the

performance of the CS1615A resonant mode AC/DC LED

driver IC with a 58mA output driving

42xLEDs 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

AN402

1 2 3 4 5 6 ... 13 14

Podsumowanie treści

Strona 1 - Design Example of CS1615A

Strona 2 - Risk of Electric Shock

AN402105. DIMMER COMPATIBILITYA19 Lamp with a CS1615A (120V/60Hz)Date 11/20/2013 Power Factor1,40.934Vendor Cirrus Logic EN55015 Compliant (Y/N) NInpu

Strona 3 - 1. INTRODUCTION

AN402111. Tested at nominal input voltage, nominal input frequency and without a dimmer after soaking for 15 minutes2. Average3. Peak-to-peak4. Measur

Strona 4 - 2. SCHEMATIC

AN402126. PERFORMANCE PLOTS 0.040.0450.050.0550.06108 110 112 114 116 118 120 122 124 126 128 130 132LED Current (A) Link Voltage (V) Figure 6. Outpu

Strona 5 - 3. BILL OF MATERIALS

AN40213 0.950.9550.960.9650.970.9750.980.9850.990.9951108 110 112 114 116 118 120 122 124 126 128 130 132Power Factor Line Voltage (V) Figure 8. Pow

Strona 6 - 4. BOARD LAYOUT

AN402147. REVISION HISTORYRevision Date ChangesRD1 AUG 2014 Preliminary release

Strona 7 - Figure 3. Bottom Silkscreen

AN4022Contacting Cirrus Logic SupportFor all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to y

Strona 8 - Figure 4. Top Routing

AN40231. INTRODUCTIONThe CS1615A is a 120VAC quasi-resonant buck-boost mode dimmable LED controller IC. The CS1615A uses adigital control algorithm th

Strona 9 - Figure 5. Bottom Routing

AN40242. SCHEMATICFigure 1. Schematic

Strona 10 - 5. DIMMER COMPATIBILITY

AN40253. BILL OF MATERIALS Ref Descript Part # ManufacturerBR1 DIODE RECT 200V 0.8A NPB MINIDIP HD02-T DIODES INCC1 CAP FILM 0.047UF 250VDC RADIAL B3

Strona 11

AN40264. BOARD LAYOUTFigure 2. Top Silkscreen

Strona 12 - 6. PERFORMANCE PLOTS

AN4027Figure 3. Bottom Silkscreen

Strona 13 - Power Factor

AN4028Figure 4. Top Routing

Strona 14 - 7. REVISION HISTORY

AN4029Figure 5. Bottom Routing