Cirrus Logic AN400 User Manual
An400
Copyright
Cirrus Logic, Inc. 2014
(All Rights Reserved)
Cirrus Logic, Inc.
CRD1615W-11W-36V Schematic
AN400
Design Example of CS1615
for 11W Dimmer-Compatible SSL Circuit
Features
• Supports Cirrus Logic CS1615
• Quasi-resonant Buck-Boost Topology with Constant-
current Output
• Flicker-free Dimming
• Line Voltage: 108VAC -132VAC
• Rated Input Power: 11W
• Rated Output Power: 9.25W
• Efficiency: ~87.5% at 250mA for 12xLEDs 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 CRD1615-11W-36V. The CRD1615-
11W-36V reference design demonstrates the performance
of the CS1615 resonant mode AC/DC LED driver IC with a
250mA output driving 12xLEDs 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
AN400