Cirrus Logic CS1631 - Manual

Copyright  Cirrus Logic, Inc. 2013
(All Rights Reserved)
Cirrus Logic, Inc.
http://www.cirrus.com
CS1630
CS1631
2-Channel TRIAC Dimmable LED Driver IC
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
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.
Applications
• Dimmable Retrofit LED Lamps and LED Luminaries
• High CRI Lighting
• Offline LED Drivers
• Commercial Lighting
Ordering Information
See page 55
.
D7
R13
NTC
Z2
BR1 BR1
AC
Mains
C7
L1
D2
BR1 BR1
D5
C8
R11
L2
D6
C2
R4
R8
R14
R6
R7
Q4
Q2
Z1 C4
CS1630 /31
IAC
SOURCE
FBAUX
BSTOUT
GND SGND
13
16
5
4
CLAMP
GD
FBSENSE
eOTP
15
10
12
11
1
2
BSTAUX
C3
R2
D1
Q3
R10
3
R
S
C NTC
T1
R1
C1
R5
C6
D4
D3
C5
Q1
R9
R3
V
B S T
V rect
14
VDD
R12
D9
C9
C11
C12
D11
D8
R15 D10
Q5
R16
C10
Z3
IGND
LED2+
LED 1+
LED 1-
LED2-
D
GND
_
Q V CC
APR’13
DS954F3