Cirrus Logic AN402 User Manual
An402
Copyright
Cirrus Logic, Inc. 2014
(All Rights Reserved)
Cirrus Logic, Inc.
CRD1615A-8W-125V Schematic
AN402
Design Example of CS1615A
for 8.5W Dimmer-Compatible SSL Circuit
Features
• Supports Cirrus Logic CS1615A
• Quasi-resonant Buck-Boost Topology with Constant-
current Output
• Flicker-free Dimming
• Line Voltage: 108VAC -132VAC
• Rated Input Power: 8.5W
• Rated Output Power: 7.83W
• Efficiency: ~88% at 58mA for 42xLEDs 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 CS1615A, the CRD1615A-8W-125V. The
CRD1615A-8W-125V reference design demonstrates the
performance of the CS1615A resonant mode AC/DC LED
driver IC with a 58mA output driving 42xLEDs 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
AN402