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Overview

The CS1630 and CS1631 are high-performance offline AC/DC LED drivers for dimmable and high color rendering index (CRI) LED replacement lamps and luminaires. They feature Cirrus Logic’s proprietary digital dimmer compatibility control technology and digital correlated color temperature (CCT) control system that enables two-channel LED color mixing. The CS1630 is designed for 120VAC line voltage applications, and the CS1631 is optimized for 230VAC line voltage applications.

The CS1630/31 integrates a critical conduction mode boost converter, providing power factor correction and superior dimmer compatibility with a primary-side regulated quasi-resonant second stage, which is configurable for isolated and non-isolated topologies. The digital CCT control system provides the ability to program dimming profiles, such as constant CCT dimming and black body line dimming. The CS1630/31 optimizes LED color mixing by temperature compensating LED current with an external NTC. The IC controller is also equipped with power line calibration for remote system calibration and end-of-line programming. The CS1630/31 provides a register lockout feature for security against potential access to proprietary registers.

Features

? Best-in-class Dimmer Compatibility

- Leading-edge (TRIAC) Dimmers

- Trailing-edge Dimmers

- Digital Dimmers (with Integrated Power Supply)

? Correlated Color Temperature (CCT) Control System

? Up to 85 Efficiency

? Flicker-free Dimming

? Programmable Dimming Profile

- Constant CCT Dimming

- Black Body Line Dimming

? 0 Minimum Dimming Level

? Temperature Compensated LED Current

? End-of-line Programming Using Power Line Calibration

- Lower LED Binning Requirement

? Programmable Series or Parallel Two-Channel Output

- Interleaved Output Eliminates Additional Transformer

? Programmable Quasi-resonant Second Stage with

Constant-current Output

- Flyback, Buck, and Tapped Buck

? Register Lockout

? Fast Startup

? Tight LED Current Regulation: Better than ±5

? Primary-side Regulation (PSR)

? >0.9 Power Factor

? IEC-61000-3-2 Compliant

? Soft Start

? Protections:

- Output Open/Short

- Current-sense Resistor Open/Short

- External Overtemperature Using NTC

Applications

? Dimmable Retrofit LED Lamps and LED Luminaries

? High CRI Lighting

? Offline LED Drivers

? Commercial Lighting