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Cirrus Logic, Inc.

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CDB1610-8W

8 Watt Demonstration Board

Features

• Quasi-resonant Flyback with Constant-current Output

• Flicker-free Dimming

• Line Voltage 120VAC, ±10%

• Rated Input Power: 8.3W

• Rated Output Power: 7.0W

• Efficiency: 84% at 460mA, for 5

LEDs in series

• Low Component Count

• Supports Cirrus Logic Product CS1610

General Description

The CDB1610-8W reference design demonstrates the

performance of the CS1610 resonant mode AC/DC

dimmable LED driver IC with a 460mA output driving

5LEDs in series

. It offers best-in-class dimmer

compatibility with leading-edge, trailing-edge, and digital

dimmers.

DIMENSIONS (OVERALL)

Length Width Height

For more information, see Figure 3.

ORDERING INFORMATION

CDB1610-8W-Z 8 Watt Reference Design

Supports CS1610

3.62 91.9mm2.54 64.5mm1.108 28mm

FEB ‘13

DS977DB4

Summary of content (21 pages)

PAGE 1
CDB1610-8W CDB1610-8W 8 Watt Demonstration Board Features General Description • Quasi-resonant Flyback with Constant-current Output • Rated Input Power: 8.3W The CDB1610-8W reference design demonstrates the performance of the CS1610 resonant mode AC/DC dimmable LED driver IC with a 460mA output driving 5  LEDs in series. It offers best-in-class dimmer compatibility with leading-edge, trailing-edge, and digital dimmers. • Rated Output Power: 7.
PAGE 2
CDB1610-8W IMPORTANT SAFETY INSTRUCTIONS Read and follow all safety instructions prior to using this demonstration board. This Engineering Evaluation Unit or Demonstration Board must only be used for assessing IC performance in a laboratory setting. This product is not intended for any other use or incorporation into products for sale. This product must only be used by qualified technicians or professionals who are trained in the safety procedures associated with the use of demonstration boards.
PAGE 3
CDB1610-8W 1. INTRODUCTION The CS1610 is a 120VAC quasi-resonant flyback mode dimmable LED controller IC. The CS1610 uses a digital control algorithm that is optimized for high efficiency and >0.9 power factor over a wide input voltage range (108VAC to 132VAC). The CS1610 integrates a critical conduction mode (CRM) boost converter that provides power factor correction and dimmer compatibility with a constant output current, quasi-resonant flyback stage.
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PAGE 5
CDB1610-8W 3. BILL OF MATERIALS Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 Rev A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A B1 A A A Description WIRE 24 AWG SOLID PVC INS BLK NPb DIODE RECT 400V 0.8A NPB MINIDIP CAP 0.1uF ±10% 250V POLY NPb RAD CAP 2.
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4. BOARD LAYOUT CDB1610-8W DS977DB4 Figure 3.
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DS977DB4 7 CDB1610-8W Figure 4.
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CDB1610-8W DS977DB4 Figure 5.
PAGE 9
DS977DB4 9 CDB1610-8W Figure 6.
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CDB1610-8W 5. DIMMER COMPATIBILITY - CS1610 (108V - 132V) Input Power 8.3W 836/888 Dimmer Compatibility Date 12/19/2011 Power Factor1,5 Vendor Cirrus Logic EN55015 Compliant (Y/N) 84.3% Efficiency 0.91 Y 1,5 8.3 Input Voltage 120V Nominal Input Power (W) Form Factor CRD1610-8W Maximum Input Power (W)2,5 8.5 Model # CDB1610-8W Output Voltage (V)1,3 14.
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CDB1610-8W Dimmer Type Flicker Free Steady-state Monotonic Dimming Max Iout (mA) Min Iout (mA) # of Lamps # of Lamps # of Lamps # of Lamps Total 1 5 10 1 5 10 1 5 10 1 5 10 Lutron - Trailing Edge Y Y Y Y Y Y 445 440 435 9 9 9 21 Lutron - Leading Edge Y Y Y Y Y Y 470 469 470 9 9 9 24 Lutron - Leading Edge Y Y Y Y Y Y 469 470 469 9 9 9 24 Lutron - Motion Sensor Y Y Y Y Y Y 470 469 470 0 0 0 24 Lutron - Leading Edge Y Y Y Y Y
PAGE 12
CDB1610-8W 6. INDUCTOR CONSTRUCTION The CDB1610-8W includes a critical conduction mode (CRM) boost converter that provides power factor correction and dimmer compatibility with a constant output current, quasi-resonant flyback stage. The following sections describe the boost and flyback inductors installed on the CDB1610-8W. 6.
PAGE 13
CDB1610-8W 6.2 Flyback Transformer The flyback transformer stage is a quasi-resonant current-regulated DC-DC Converter capable of delivering the highest possible efficiency at a constant current while minimizing line frequency ripple. The auxiliary winding is used for zero-current detection and overvoltage protection. 4 113T #36 AWG (0.13 mm) Primary 5 67 T # 36AWG (0.13mm) B 10T #27AWG (0.35mm) Secondary A 3 2 10 T # 36AWG (0.13mm) Auxiliary 1 Figure 8. Flyback Transformer Schematic 6.2.
PAGE 14
CDB1610-8W 7. PERFORMANCE PLOTS 0.5 Output Current (mA) 0.4 0.3 0.2 0.1 0 20 40 60 80 100 120 140 160 180 Dim Angle (°) Figure 9. Typical Output Current vs. Dim Angle 10 9 8 Input Power (W) 7 6 5 4 3 2 1 0 20 40 60 80 100 120 140 160 180 Dim Angle (°) Figure 10. Typical Input Power vs.
PAGE 15
CDB1610-8W 1.00 Output Current (A) 0.80 0.60 0.40 0.20 0.00 100 110 120 130 140 Line Voltage (V) Figure 11. Output Current vs. Line Voltage, 108VAC to 132VAC 90 Efficiency (%) 80 70 60 100 110 120 130 140 Vin (VAC) Figure 12. Typical Efficiency vs.
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CDB1610-8W 1.00 0.95 Power Factor 0.90 0.85 0.80 0.75 0.70 0.65 0.60 100 110 120 130 140 Line Voltage (V) Figure 13. Power Factor vs.
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CDB1610-8W Figure 14. No-dimmer Mode, Startup 120 VAC Figure 15.
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CDB1610-8W Figure 16. Boost FET, Q1, Waveform Figure 17.
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CDB1610-8W Figure 18. ILED at Maximum Dim Angle, Turn-on Waveforms Figure 19.
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CDB1610-8W Figure 21.
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CDB1610-8W 8. REVISION HISTORY Revision Date Changes DB1 FEB 2012 Initial Release. DB2 FEB 2012 Change to schematic and BOM. DB3 AUG 2012 Updated schematic. DB4 FEB 2013 Corrected typographical errors.