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Cirrus Logic

CS1630 Datasheet Preview

CS1630 Datasheet

(CS1630 / CS1631) 2-Channel TRIAC Dimmable LED Driver IC

No Preview Available !

CS1630
CS1631
2-Channel TRIAC Dimmable LED Driver IC
Features & Description
• 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 2-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. It features 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 & Description
• Dimmable Retrofit LED Lamps and LED Luminaries
• High CRI Lighting
• Offline LED Drivers
• Commercial Lighting
Ordering Information
See page 53.
L1
BR1 BR1
AC
Mains
BR1
R1
C2
C1
BR1
Vr ec t
C3 R3
R2 R4
D2
Q1
D1 Z1 C4
L2
R5
D3 C6
C5 D4
D6
R6
R7 1
BSTAUX
R8
R9
16
BSTOUT
CLAMP 3
2
IAC
CS1630 /31
13
GD
Q2 15
5 FBAUX
SOURCE
D5 FBSENSE 11
14 VDD
10
eOTP
C7 SGND
4
GND
12
VB S T
R10 C8 Z2
D7
Q3
Q4
T1
D8
R12
C9
Z3
C10
V CC
D_
Q
GND
R15
D9
RS
NTC
CNTC R11
R13
R14
LED2+
C11
LED 2-
Q5
LED1+
C12
LED 1-
D10
Preliminary Product Information
This document contains information for a product under development.
Cirrus Logic reserves the right to modify this product without notice.
Cirrus Logic, Inc.
http://www.cirrus.com
Copyright Cirrus Logic, Inc. 2012
(All Rights Reserved)
MAY’12
DS954PP4




Cirrus Logic

CS1630 Datasheet Preview

CS1630 Datasheet

(CS1630 / CS1631) 2-Channel TRIAC Dimmable LED Driver IC

No Preview Available !

CS1630/31
1. INTRODUCTION
BSTOUT 16
IAC 2
15 k
Iref
MUX
ADC
15k
BSTAUX 1
SOURCE 5
VFB ZCD(th)
+
-
V S OURCE(th )
+
-
Boost ZCD
t B S TZCD
I S OURCE
SGND 4
SDA 6
SCL 7
SYNC 9
NC 8
eOTP 10
VDD
I CONNE CT
VCONNE CT(th)
-
+
Voltage
Regulator
POR
+
-
V S T(th)
V S TP (th )
VZ
tLE B
OLP
OCP
Peak
Control
DAC
-
+ VOLP (th)
+
- VOCP (th )
+
-
V P k_Max(th)
Output Open
tFB ZCD
Flyback ZCD
+
- VOV P (th )
+
- VFB ZCD(th)
VDD
ICLA MP
14 VDD
13 GD
12 GND
11 FBSENSE
15 FBAUX
3 CLAMP
Figure 1. CS1630/31 Block Diagram
A typical schematic using the CS1630/31 IC is shown on the
previous page.
Startup current is provided from a patent-pending, external
high-voltage source-follower network. In addition to providing
startup current, this unique topology is integral in providing
compatibility with digital dimmers by ensuring VDD power is
always available to the IC. During steady-state operation, an
auxiliary winding on the boost inductor back-biases the
source-follower circuit and provides steady-state operating
current to the IC to improve system efficiency.
The rectified input voltage is sensed as a current into pin IAC
and is used to control the adaptive dimmer compatibility
algorithm and extract the phase of the input voltage for output
dimming control. During steady-state operation, the external
high-voltage, source-follower circuit is source-switched in
critical conduction mode (CRM) to boost the input voltage.
This allows the boost stage to maintain good power factor,
provide dimmer compatibility, reduce bulk capacitor ripple
current, and provide a regulated input voltage to the second
stage.
The current into the boost output voltage sense pin (BSTOUT)
senses the output voltage of the CRM boost front-end.
The quasi-resonant second stage is implemented with peak-
current mode primary-side control, which eliminates the need
for additional components to provide feedback from the
secondary and reduces system cost and complexity.
Voltage across an external user-selected resistor is sensed
through pin FBSENSE to control the peak current through the
second stage inductor. Leading-edge and trailing-edge
blanking on pin FBSENSE prevents false triggering.
Pin FBAUX is used to sense the second stage inductor
demagnetization to ensure quasi-resonant switching of the
output stage.
An internal current source is adjusted by a feedback loop to
regulate a constant reference voltage on pin eOTP for external
negative temperature coefficient (NTC) thermistor
measurements. An external NTC is connected to pin eOTP to
provide thermal protection of the system and LED temperature
compensation. The output current of the system is steadily
reduced when the system temperature exceeds a
programmable temperature set point. If the temperature
reaches a designated high set point, the IC is shutdown and
stops switching.
2 DS954PP4


Part Number CS1630
Description (CS1630 / CS1631) 2-Channel TRIAC Dimmable LED Driver IC
Maker Cirrus Logic
PDF Download

CS1630 Datasheet PDF






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