Cirrus Logic CRD1610A-8W - Manual (Page 3)

CRD1610A-8W
DS1012RD3 3
1. INTRODUCTION
The CS1610A is a 120VAC quasi-resonant flyback mode dimmable LED controller IC. The CS1610A uses a digital
control algorithm that is optimized for high efficiency and > 0.90 power factor over a wide input voltage range
(108VAC to 132VAC). The CS1610A 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. An
adaptive dimmer compatibility algorithm controls the boost stage and dimmer compatibility operation mode to enable
flicker-free operation to <2% output current with leading-edge, trailing-edge, and digital dimmers.
The CRD1610A-8W board is optimized to deliver low system cost in a high-efficiency, flicker-free, phase-dimmable,
solid-state lighting (SSL) solution for incandescent lamp replacement applications. The feedback loop is closed
through an integrated digital control system within the IC. The variation in switching frequency also provides a
spread-frequency spectrum, thus minimizing the conducted EMI filtering requirements. Protection algorithms such
as output open/short, current-sense resistor open/short, and overtemperature thermistors protect the system during
abnormal conditions. Details of these features are provided in the CS1610A/11A/12A/13A TRIAC Dimmable LED
Driver IC data sheet.
The CRD1610A-8W board demonstrates the performance of the CS1610A. This reference board has been de-
signed for an output load of 5

LEDs in series at 460mA (14.6V typical).
This document provides the schematic for the board. It includes oscilloscope screen shots that indicate various op-
erating waveforms. Graphs are also provided that document the performance of the board in terms of Efficiency vs.
Line Voltage, Output Current vs. Line Voltage, and Output Current vs. Dim Angle for the CS1610A dimmable LED
controller IC.
Extreme caution needs to be exercised while handling this board. This board is to be used by trained professionals
only.