Cirrus-logic AN405 Instrukcja Użytkownika Pobierz pdf (Strona 1)

Cirrus Logic, Inc.

http://www.cirrus.com

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CRD1680-10W-18V Schematic

AN405

Design Example of CS1680

for 10W Dimmer-Compatible SSL Circuit

Features

• Constant-current Output

• Flicker-free Dimming

• Line Voltage: 12 VAC/VDC, +/- 10%

• Rated Input Power: 10W

• Rated Output Power: 7.8W

• Efficiency: ~82% at 430mA for 6xLEDs 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 CS1680, the CRD1680-10W-18V. The CRD1680-

10W-18V reference design demonstrates the performance

of the CS1680 dimmable LED driver for low-voltage lighting

with a 430mA output driving

6xLEDs in series

. It provides

exceptional single-lamp and multi-lamp transformer

compatibility for non-dimmer systems and dimmer systems

paired with electronic and magnetic low-voltage

transformers. The form factor is targeted to fit into MR16

LED lamp applications.

OCT‘14

AN405

1 2 3 4 5 6 ... 12 13

Podsumowanie treści

Strona 1 - Design Example of CS1680

Strona 2 - Risk of Electric Shock

AN405105. DIMMER COMPATIBILITYTable 2: 120VAC, 60HZ Mains Power System1. Tested at nominal input voltage, nominal input frequency and without a dimmer

Strona 3 - 1. INTRODUCTION

AN405116. PERFORMANCE PLOTS 00.050.10.150.20.250.30.350.40.450.515 30 45 60 75 90 105 120 135 150 165 180Output Current (A) Dim Angle (ƕ) Mode 2 Mode

Strona 4 - 2. SCHEMATIC

AN40512 0.370.380.390.40.410.420.430.440.450.460.47108 110 112 114 116 118 120 122 124 126 128 130 132Output Current (A) Line Voltage (V) Mode 2 Mode

Strona 5 - 3. BILL OF MATERIALS

AN405137. REVISION HISTORYRevision Date ChangesRD1 AUG 2014 Preliminary release

Strona 6 - 4. BOARD LAYOUT

AN4052Contacting Cirrus Logic SupportFor all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to y

Strona 7 - Figure 3. Bottom Silkscreen

AN40531. INTRODUCTIONThe CS1680 is a cascade boost-buck dimmable LED controller IC. The CS1680 uses a Cirrus Logic proprietary in-telligent digital co

Strona 8 - Figure 4. Top Routing

AN40542. SCHEMATICFigure 1. Schematic       

Strona 9 - Figure 5. Bottom Routing

AN40553. BILL OF MATERIALS Designator Value Manufacturer Part NumberC1, C10 CAP CER 10UF 25V 10% X7R 1206 Taiyo Yuden TMK316B7106KL-TDC2CAP CER 27PF

Strona 10 - 5. DIMMER COMPATIBILITY

AN40564. BOARD LAYOUTFigure 2. Top Silkscreen

Strona 11 - 6. PERFORMANCE PLOTS

AN4057Figure 3. Bottom Silkscreen

Strona 12 - Efficiency (%)

AN4058Figure 4. Top Routing

Strona 13 - 7. REVISION HISTORY

AN4059Figure 5. Bottom Routing