Cirrus Logic AN374 - Manual (Page 4)

AN374
4 AN374REV2
2 Introduction
This application note provides a guide to designing a solid-state lighting (SSL) LED lamp circuit using Cirrus Logic's
CS1630/31. The first half of the document presents an introduction to the CS1630/31 color control system and the
criterion for selecting a compatible light engine. The second half of the document supports the design effort by de-
tailing the requirements to curve fit the polynomial gain equations for a robust color correlation temperature solution.
2.1 Definition of Acronyms
Acronym Description
PFC Power Factor Correction
ZCD Zero-current Detection
BOP Boost Overvoltage Protection
COP Clamp Overpower Protection
OVP Second-stage Output Open Circuit Protection and Overvoltage Protection
OCP Second-stage Overcurrent Protection
OLP Second-stage Open Loop Protection
SCP Short Circuit Protection
iOTP Internal Overtemperature Protection
eOTP External Overtemperature Protection
PLC Power Line Calibration
OTP One-time Programmable
LED Light Emitting Diode
TX Transformer
TRIAC
TRIode for Alternating Current, which is an electronic component that can conduct current in either
direction when it is triggered. It is formally called a bidirectional triode thyristor.
NTC Negative Temperature Coefficient thermistor
SSL
Solid-state lighting. Refers to a type of lighting that uses semiconductor LEDs as a source of illumi-
nation rather than electrical filaments, plasma, or gas.
CSV Comma-separated Values File
CCT Correlated Color Temperature
DAC Digital-to-Analog Converter