Cirrus Logic AN399 User Manual
An399, Top bottom, Features
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Cirrus Logic, Inc. 2014
(All Rights Reserved)
Cirrus Logic, Inc.
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AN399
Design Example of CS1611
for 11W Dimmer-Compatible SSL Circuit
Features
• Supports Cirrus Logic CS1611
• Quasi-resonant Flyback Topology with Constant-
current Output
• Flicker-free Dimming
• Line Voltage: 207VAC - 223VAC
• Rated Input Power: 11W
• Rated Output Power: 9W
• Efficiency: ~83% at 300mA for 10xLEDs 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 CS1611, the CRD1611-11W-30V. The CRD1611-
11W-30V reference design demonstrates the performance
of the CS1611 resonant mode AC/DC LED driver IC with a
300mA output driving 10xLEDs 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
AN399