Cirrus-logic AN401 Instrukcja Użytkownika Pobierz pdf (Strona 1)

Cirrus Logic, Inc.

http://www.cirrus.com

CRD1615-25W-33V Schematic

AN401

Design Example of CS1615

for 25W Dimmer-Compatible SSL Circuit

Features

• Supports Cirrus Logic CS1615

• Quasi-resonant Flyback Topology with Constant-

current Output

• Flicker-free Dimming

• Line Voltage: 108VAC -132VAC

• Rated Input Power: 25W

• Rated Output Power: 20.5W

• Efficiency: ~83% at 575mA for 11xLEDs 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 CRD1615-25W-33V. The CRD1615-

25W-33V reference design demonstrates the performance

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

575mA output driving

11xLEDs 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

AN401

1 2 3 4 5 6 ... 13 14

Podsumowanie treści

Strona 1 - Design Example of CS1615

Strona 2 - Risk of Electric Shock

AN401105. DIMMER COMPATIBILITYA19 Lamp with a CS1615A (120V/60Hz)Date 4/5/2013 Power Factor1,40.99Vendor Cirrus Logic EN55015 Compliant (Y/N) NInput V

Strona 3 - 1. INTRODUCTION

AN401111. 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

AN401126. PERFORMANCE PLOTS 0.50.510.520.530.540.550.560.570.580.59108 110 112 114 116 118 120 122 124 126 128 130 132LED Current (A) Line Voltage (V)

Strona 5 - 3. BILL OF MATERIALS

AN40113 0.950.9550.960.9650.970.9750.980.9850.990.995108 110 112 114 116 118 120 122 124 126 128 130 132Power Factor Line Voltage (V) Figure 8. Power

Strona 6 - 4. BOARD LAYOUT

AN401147. REVISION HISTORYRevision Date ChangesRD1 AUG 2014 Preliminary release

Strona 7 - Figure 3. Bottom Silkscreen

AN4012Contacting 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

AN40131. INTRODUCTIONThe CS1615 is a 120VAC quasi-resonant flyback mode dimmable LED controller IC. The CS1615 uses a digital con-trol algorithm that

Strona 9 - Figure 5. Bottom Routing

AN40142. SCHEMATICFigure 1. Schematic

Strona 10 - 5. DIMMER COMPATIBILITY

AN40153. BILL OF MATERIALS Part Description Part Number ManufacturerC1 CAP FILM 0.12UF 250VDC RADIAL ECQ-E2124KB Panasonic Electronic ComponentsC

Strona 11

AN40164. BOARD LAYOUTFigure 2. Top Silkscreen

Strona 12 - 6. PERFORMANCE PLOTS

AN4017Figure 3. Bottom Silkscreen

Strona 13 - Power Factor

AN4018Figure 4. Top Routing