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Cirrus Logic, Inc.

http://www.cirrus.com

CS1615

CS1616

Single Stage Dimmable Offline AC/DC

Controller for LED Lamps

Features

• Best-in-class Dimmer Compatibility

- Leading-edge (TRIAC) Dimmers

- Trailing-edge Dimmers

- Digital Dimmers (Dimmers with an Integrated Power

Supply)

• Flicker-free Dimming

• 0% to 100% Smooth Dimming

• Primary-side Regulation (PSR)

• Active Power Factor Correction (PFC)

- >0.9 Power Factor

• Constant-current Output

- Flyback

- Buck-boost

• Tight LED Current Regulation: Better than ±5%

• Low THD: Less Than 20%

• Up to 90% Efficiency

• Fast Startup

• IEC61000-3-2 Compliant

• Meets NEMA SSL 6 Dimming Standard

- Closely Matches Incandescent S-curve

• Protection Features

- Output Open Circuit

- Output Short Circuit

- External Overtemperature Using NTC

Overview

The CS1615 and CS1616 are high-performance single

stage dimmable offline AC/DC controllers. The CS1615/16

is a cost-effective solution that provides unmatched single-

and multi-lamp dimmer-compatibility performance for

dimmable LED applications. The CS1615 is designed for

120VAC line voltage applications, and the CS1616 is

designed for 230VAC line voltage applications.

Across a broad range of dimmers, the CS1615/16 provides

smooth flicker free dimming, and consistently dims to

nearly zero light output, which closely matches the dimming

performance of incandescent light bulbs. Cirrus Logic’s

patent pending approach to dimmer compatibility provides

full functionality on a wide range of dimmers, including

leading-edge, trailing-edge, and digital dimmers.

Applications

• Retro-fit LED Lamps

• External LED Drivers

• LED Luminaries

• Commercial Lighting

Ordering Information

See page 14.

Mains

BR1

CS1615/16

FBAUX

GND

IAC

LED+

VDD

SOURCE

eOTP

NTC

LED-

FBSENSE

Sense

SGN D

CTRL1 CTRL2

CTRL1

CTRL2

C1 C2

rect

AUX

R4 R5

JUN’13

DS961F1

Summary of content (16 pages)

PAGE 1
CS1615 CS1616 Single Stage Dimmable Offline AC/DC Controller for LED Lamps Features Overview • Best-in-class Dimmer Compatibility - Leading-edge (TRIAC) Dimmers - Trailing-edge Dimmers - Digital Dimmers (Dimmers with an Integrated Power Supply) • Flicker-free Dimming • 0% to 100% Smooth Dimming • Primary-side Regulation (PSR) • Active Power Factor Correction (PFC) - >0.
PAGE 2
CS1615/16 1. INTRODUCTION VDD VDD Voltage Regulator 14 VDD(on) VDD(off ) VZ I ref 15k 2 OLP - + VS OURCE(th) Peak Control + - + - - t VAUX CTRL1 eOTP CTRL2 11 FBSENSE 16 FBAUX 3 CLAMP VOCP (th) VP k_Max (th ) DAC SGND GND VOLP (th ) + ADC - 5 12 3 OCP SOURCE GD - Blank IAC 13 POR + + V FS TA RT(th ) 4 Output Overvoltage 8 Zero-current Detect ICONNE CT 10 9 + - VOV P(th ) VDD MUX + - VZCD(th) VDD V CONNE CT(th) - I CLA MP + Figure 1.
PAGE 3
CS1615/16 2. PIN DESCRIPTION NC 1 16 FBAUX Zero-current Detect Rectifier Voltage Sense IAC 2 15 NC No Connect Voltage Clamp Current Source CLAMP 3 14 VDD IC Supply Voltage Source Ground SGND 4 13 GD Gate Drive Source Switch SOURCE 5 12 GND Ground No Connect NC 6 11 FBSENSE Flyback Current Sense No Connect NC 7 10 eOTP External Overtemperature Protection Dimmer Hold Current CTRL1 8 9 CTRL2 LED Load Current No Connect 16-lead SOIC and TSSOP Figure 2.
PAGE 4
CS1615/16 3. CHARACTERISTICS AND SPECIFICATIONS 3.1 Electrical Characteristics Typical characteristics conditions: • TA = 25 °C, VDD = 12V, GND = 0 V • All voltages are measured with respect to GND. • Unless otherwise specified, all currents are positive when flowing into the IC.
PAGE 5
CS1615/16 Parameter Condition Symbol Min Typ Max Unit Flyback/Buck-boost Protections Overcurrent Protection (OCP) (Note 4) VOCP(th) - 1.69 - V Overvoltage Protection (OVP) (Note 5) VOVP(th) - 1.
PAGE 6
CS1615/16 3.2 Thermal Resistance Symbol Parameter SOIC TSSOP Unit JA Junction-to-Ambient Thermal Impedance 2 Layer PCB 4 Layer PCB 119 105 138 103 °C/W °C/W JC Junction-to-Case Thermal Impedance 2 Layer PCB 4 Layer PCB 50 44 44 28 °C/W °C/W 3.3 Absolute Maximum Ratings Characteristics conditions: All voltages are measured with respect to GND. Pin Symbol 14 VDD Parameter IC Supply Voltage Value Unit 18.5 V 2,8,9, 10,11,16 Analog Input Maximum Voltage -0.5 to (VDD +0.
PAGE 7
CS1615/16 4. TYPICAL PERFORMANCE PLOTS 8 3 2 IDD (mA) UVLO Hysteresis 6 4 Falling Edge 2 Rising Edge 1 0 -2 0 -50 0 50 100 0 150 2 4 6 8 Temperature (ºC) 12 14 16 18 20 VDD (V) Figure 3. UVLO Characteristics Figure 4. Supply Current vs. Voltage 10 20 19.5 9 Turn On Vz (V) VDD (V) 10 19 8 Turn Off 18.5 7 -50 0 50 100 18 150 -45 Temperature (ºC) -20 5 25 55 85 105 125 Temperature (ºC) Figure 6. Zener Voltage vs. Temperature Figure 5.
PAGE 8
CS1615/16 5. GENERAL DESCRIPTION 5.1 Overview The CS1615 and CS1616 are high-performance single stage dimmable offline AC/DC controllers. The CS1615/16 is a costeffective solution that provides unmatched single- and multi-lamp dimmer-compatibility performance for dimmable LED applications. The CS1615 is designed for 120VAC line voltage applications, and the CS1616 is designed for 230VAC line voltage applications.
PAGE 9
CS1615/16 dimmer switch on the falling edge of the input voltage using a source-controlled dimmer-compatibility circuit. 5.4.1 Clamp Overpower Protection The CS1615/16 clamp overpower protection (COP) control logic averages the turn-on time of the clamp circuit. If the output of the averaging logic exceeds 10%, a COP event is actuated. The clamp circuit is disabled as well as the flyback/buck-boost controller and the dimmer-compatibility circuit.
PAGE 10
CS1615/16 Figure 14 illustrates the dual-mode buck-boost topology. The CS1615/16 regulates the output current by controlling the peak current to ensure that the target output charge is achieved every half line-cycle. Demagnetization time of the inductor is sensed by the FBAUX pin using an auxiliary winding and is used as an input to the control loop.
PAGE 11
CS1615/16 Overcurrent Protection Overcurrent protection (OCP) is implemented by monitoring the voltage across the sense resistor. If this voltage exceeds a threshold VOCP(th) of 1.69V, a fault condition occurs. The IC output is disabled and the controller attempts to restart after approximately one second. 5.6.8 Open Loop Protection Open loop protection (OLP) and sense resistor short protection are implemented by monitoring the voltage across the resistor.
PAGE 12
CS1615/16 6. PACKAGE DRAWING 16-PIN TSSOP (173 MIL BODY) F # & & ("6(& 1-"/& T 1*/ */%*$"503 - %&5"*- " Y 5JQT EEE $ # " 501 7*&8 %&5"*- " % " " D 4&"5*/( 1-"/& C " Y Y $ CCC BBB $ $# " &/% 7*&8 4*%& 7*&8 mm Dimension MIN NOM MAX MIN NOM MAX A -- -- 1.20 -- -- 0.047 A1 0.05 -- 0.15 0.002 -- 0.006 b 0.19 -- 0.30 0.007 -- 0.012 C 0.09 -- 0.20 0.004 -- 0.008 D 4.90 5.00 5.10 0.193 0.197 0.201 E E1 6.40 BSC 4.30 e 1. 2.
PAGE 13
CS1615/16 16-PIN SOICN (150 MIL BODY) mm inch Dimension MIN NOM MAX MIN NOM MAX A -- -- 1.75 -- -- 0.069 A1 0.10 -- 0.25 0.004 -- 0.010 b 0.31 -- 0.51 0.012 -- 0.020 c 0.10 -- 0.25 0.004 -- 0.010 D 9.90 BSC 0.390 BSC E 6.00 BSC 0.236 BSC E1 3.90 BSC 0.154 BSC e 1.27 BSC 0.050 BSC L 0.40 -- 1.27 0.016 -- 0.050 Θ 0° -- 8° 0° -- 8° aaa 0.10 0.004 bbb 0.25 0.010 ddd 0.25 0.010 Notes: 1. Controlling dimensions are in millimeters. 2. 3. 4.
PAGE 14
CS1615/16 7. ORDERING INFORMATION Ordering Number Container CS1615-FSZ Bulk CS1615-FSZR Tape & Reel CS1616-FSZ Bulk CS1616-FSZR Tape & Reel CS1615-FZZ Bulk CS1615-FZZR Tape & Reel CS1616-FZZ Bulk CS1616-FZZR Tape & Reel AC Line Voltage Temperature Package 120VAC -40 °C to +125 °C 16-lead SOICN, Lead (Pb) Free 230VAC -40 °C to +125 °C 16-lead SOICN, Lead (Pb) Free 120VAC -40 °C to +125 °C 16-lead TSSOP, Lead (Pb) Free 230VAC -40 °C to +125 °C 16-lead TSSOP, Lead (Pb) Free 8.
PAGE 15
CS1615/16 REVISION HISTORY Revision Date T1 JUN 2012 Initial release. PP1 JUL 2012 Corrected typographical errors. PP2 SEP 2012 Clarified context and corrected typographical errors. PP3 OCT 2012 Clarified context. PP4 JAN 2013 Buck-boost content added, and clarified context. PP5 APR 2013 Context clarification.
PAGE 16
CS1615/16 Contacting Cirrus Logic Support For all product questions and inquiries contact a Cirrus Logic Sales Representative. To find the one nearest to you go to www.cirrus.com IMPORTANT NOTICE Cirrus Logic, Inc. and its subsidiaries ("Cirrus") believe that the information contained in this document is accurate and reliable. However, the information is subject to change without notice and is provided "AS IS" without warranty of any kind (express or implied).