Cirrus Logic CRD1611-8W User Manual

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CRD1611-8W

2.284 58mm1.181 29.9mm0.652 16.5mm

8 Watt Reference Design

CRD1611-8W

Features

• Quasi-resonant Flyback with Constant-current Output

• Flicker-free Dimming

• Line Voltage 230VAC, ±10%

• Rated Input Power: 8.0 W

• Rated Output Power: 6.6W

• Output Voltage: 11.0V to 12.6V

• Efficiency: 83% at 550mA, for 4

• Low Component Count

• Supports Cirrus Logic Product CS1611

LEDs in series

General Description

The CRD1611-8W reference design demonstrates the
performance of the CS1611 resonant mode AC/DC
dimmable LED driver IC with a 550mA output driving
4LEDs in series
compatibility with leading-edge, trailing-edge, and digital
dimmers. The form factor is targeted to fit into many LED
bulb applications (A19, PAR).

DIMENSIONS (OVERALL)

Length Width Height

For more information, see Figure 3.

ORDERING INFORMATION

CRD1611-8W-Z 8 Watt Reference Design

. It offers best-in-class dimmer

Supports CS1611

Cirrus Logic, Inc.

http://www.cirrus.com

tt

Copyright  Cirrus Logic, Inc. 2013

(All Rights Reserved)

FEB‘12

DS975RD5

CRD1611-8W

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). Customers are advised to obtain the latest version of relevant
information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale
supplied at the time of order acknowledgment, including those pertaining to warranty, indemnification, and limitation of liability. No responsibility is assumed by Cirrus
for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third
parties. This document is the property of Cirrus and by furnishing this information, Cirrus grants no license, express or implied under any patents, mask work rights,
copyrights, trademarks, trade secrets or other intellectual property rights. Cirrus owns the copyrights associated with the information contained herein and gives
consent for copies to be made of the information only for use within your organization with respect to Cirrus integrated circuits or other products of Cirrus. This con­sent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale.

CERTAIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROP­ERTY OR ENVIRONMENTAL DAMAGE ("CRITICAL APPLICATIONS"). CIRRUS PRODUCTS ARE NOT DESIGNED, AUTHORIZED OR WARRANTED FOR
USE IN PRODUCTS SURGICALLY IMPLANTED INTO THE BODY, AUTOMOTIVE SAFETY OR SECURITY DEVICES, LIFE SUPPORT PRODUCTS OR OTHER
CRITICAL APPLICATIONS. INCLUSION OF CIRRUS PRODUCTS IN SUCH APPLICATIONS IS UNDERSTOOD TO BE FULLY AT THE CUSTOMER'S RISK
AND CIRRUS DISCLAIMS AND MAKES NO WARRANTY, EXPRESS, STATUTORY OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANT­ABILITY AND FITNESS FOR PARTICULAR PURPOSE, WITH REGARD TO ANY CIRRUS PRODUCT THAT IS USED IN SUCH A MANNER. IF THE CUSTOMER
OR CUSTOMER'S CUSTOMER USES OR PERMITS THE USE OF CIRRUS PRODUCTS IN CRITICAL APPLICATIONS, CUSTOMER AGREES, BY SUCH USE,
TO FULLY INDEMNIFY CIRRUS, ITS OFFICERS, DIRECTORS, EMPLOYEES, DISTRIBUTORS AND OTHER AGENTS FROM ANY AND ALL LIABILITY, IN­CLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES.

Cirrus Logic, Cirrus, the Cirrus Logic logo designs, EXL Core, the EXL Core logo design, TruDim, and the TruDim logo design are trademarks of Cirrus Logic, Inc.
All other brand and product names in this document may be trademarks or service marks of their respective owners.

IMPORTANT SAFETY INSTRUCTIONS

Read and follow all safety instructions prior to using this demonstration board.

This Engineering Evaluation Unit or Demonstration Board must only be used for assessing IC performance in a
laboratory setting. This product is not intended for any other use or incorporation into products for sale.

This product must only be used by qualified technicians or professionals who are trained in the safety procedures
associated with the use of demonstration boards.

Risk of Electric Shock

• The direct connection to the AC power line and the open and unprotected boards present a serious risk of electric
shock and can cause serious injury or death. Extreme caution needs to be exercised while handling this board.

• Avoid contact with the exposed conductor or terminals of components on the board. High voltage is present on
exposed conductor and it may be present on terminals of any components directly or indirectly connected to the AC
line.

• Dangerous voltages and/or currents may be internally generated and accessible at various points across the board.

• Charged capacitors store high voltage, even after the circuit has been disconnected from the AC line.

• Make sure that the power source is off before wiring any connection. Make sure that all connectors are well

connected before the power source is on.

• Follow all laboratory safety procedures established by your employer and relevant safety regulations and guidelines,
such as the ones listed under, OSHA General Industry Regulations - Subpart S and NFPA 70E.

Suitable eye protection must be worn when working with or around demonstration boards. Always

comply with your employer’s policies regarding the use of personal protective equipment.

All components and metallic parts may be extremely hot to touch when electrically active.

2 DS975RD5

CRD1611-8W

1. INTRODUCTION

The CS1611 is a 230VAC quasi-resonant flyback mode dimmable LED controller IC. The CS1611 uses a digital con­trol algorithm that is optimized for high efficiency and >0.9 power factor over an input voltage range (207VAC to
253VAC). The CS1611 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 CRD1611-8W 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 CS1611 data sheet.

The CRD1611-8W board demonstrates the performance of the CS1611. This reference board has been designed
for an output load of 4

This document provides the schematic for the board. It includes oscilloscope screen shots that indicate various op­erating 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 CS1611 dimmable LED
controller IC. Extreme caution needs to be exercised while handling this board. This board is to be used by trained
professionals only.

LEDs in series at 550mA (12.0V typical).

DS975RD5 3

4 DS975RD5

600-00543-Z1_Rev_A3

JWJW

SHEET

OFSHEET

ENGINEER

DATE

DRAWN BY

PART #

SHEET

4/30/2012

SCH.,CRD1611-8W-Z

11

TITLE

SIZE

B

INITIAL RELEASEA.0

DATEDESCRIPTIONREV

11/18/11

NOTES: UNLESS OT HERWISE SPECIFIED:

1. ALL RESISTO R VALUES ARE IN OHMS.

CHANGED R21 TO A 10_5 OHM RES. ADDED C12 FOR ASSEMBLY CHANGE

A1

ECO

915

ONLY. NOT REFLECT ED IN CURRENT PCB AS A C12 FOOTPRINT.

12/22/11

917

CHANGED C5 TO EL LO ESR

A2

1/6/12

A3959

CHANGED U1 PIN 6 & 7 PINNAMES TO NC

04/30/12

F1 1A

1

+

3

2

-

4

BR1
HD04-T

C1

4700pF

C2

0.1UF

C3

0.033UF

L1

4.7mH

L2

4.7mH

R1 4.7K

R2 4.7K

4

3

2

1

7A

8

B

T1

RM06-CL01

2

1

5

4

L3

RM05-CL01

D1

STTH1R06

C4

4.7uF

ELEC

1

BSTAU X

2

IAC

3

CLAMP

4

SGND

5

SOURCE

6

NC

7

NC

8

IPK

9

FBGAIN

10

EOTP

11

FBSENSE

12

GND

13

GD

14

VDD

15

FBAUX

16

BSTOUT

PAD

THERM

U1

CS1611-FSZ

12

D2
STTH1L06A

1

2

CY

2200pF

12

D3

SS26-TP

R5
27K
1%

D7

S1G-13-F

D4

1N4148W

Z1

SMAZ16-TP

16V

C8

2.2uF

X7R

R15

1.50M

R14

1.50M

R7

1.50M

R8

1.50M

R11 22.1K

R17

22.1K

R13

120K

D5
BAV23S-7-F

R10
22 OHM

C9

0.33uF

X7R

C6

22uF

ELEC

R12
51 OHM

Q1
ZVN4106FTA

Q2
STD1NK60T4

R9 47 OHM

R24

47 OHM

C10

1.0UF

X7R

R3

4.7K

Q3
FQN1N50CTA

R19 47 OHM

R18

14.0K

-t

NTC
100K

C7

100pF

COG

R20 1K

R21

10.5

R23

5.6K

R22

69.8K

S

D

G

Q4
STD1NK80ZT4

C11

47pF

C0G

PCB DWG-

240-00543-Z1

ASSY DWG-

603-00543-Z1

SCHEMATIC DWG

600-00543-Z1

LBL SUBASSY PROD ID AND REV

E1

LINE

E2

NEUTRAL

E3

LED+

E4

LED-

C5

100uF

ELEC

R4

2K

2W

Z2

P6KE350A

300V

D6

SBR130S3-7
30V

D8

SBR130S3-7
30V

R6

2K
2W

R16

2K

2W

C12

0.01UF

X7R

Figure 1. Schematic

2. SCHEMATIC

CRD1611-8W

3. BILL OF MATERIALS

__

1A
2A
3A
4A
5A
6A
7A
8A
9A
10 A
11 A
12 A
12a A
13 A
14 A
15 A
16 A
17 A
18 A
19 A
20 A
21 A
22 A
23 A
24 A
25 A
26 A
27 A
28 A
29 A
30 A
31 A
32 A
33 A
34 A
35 A
36 A
37 A
38 A
39 A
40 A
41 A
42 A
43 A
44 A
45 B1
46 A

Figure 2. Bill of Materials

CRD1611-8W

Item Rev

47 A

Description Qty Reference Designator MFG MFG P/N

DIODE RECT 400V 0.8A NPB MINIDIP 1 BR1 DIODES INC HD04-T
CAP 4700PF ±10% 1000V X7R NPb 1206 1 C1 MURATA GRM31BR73A472KW01L
CAP 0.1UF ±5% 400V MTL FLM RAD 1 C2 Panasonic ECQE4104JF
CAP 0.033uF ±10% 400V MTL NPb RAD 1 C3 PANASONIC ECQE4333KF
CAP 4.7uF 450V ±20% NPb RAD 10x20 1 C4 PANASONIC-ECG ECA2WHG4R7
CAP 100uF ±20% 25V EL LO ESR NPb RD 1 C5 PANASONIC EEUFM1E101
CAP 22uF ±20% 35V ELEC NPb RAD 1 C6 PANASONIC EEA-GA1V220H
CAP 100pF ±5% 50V C0G NPb 0603 1 C7 KEMET C0603C101J5GAC
CAP 2.2uF ±10% 25V X7R NPb 0805 1 C8 MURATA GRM21BR71E225KA73L
CAP 0.33UF ±10% 50V X7R NPb 0603 1 C9 TDK C1608X7R1H334K
CAP 1.0uF 10% 25V X7R NPb 0603 1 C10 MURATA GRM188R71E105KA12D
CAP 47pF ±5% 1000V C0G NPb 1206 1 C11 JOHANSON DIELECTRICS 102R18N470JV4E
CAP 0.01uF ±10% 630V X7R NPb 1206 1 C12 MURATA
CAP 2200PF +80/-20% 2KV CER NPb RAD 1 CY MURATA DEBE33D222ZA2B
DIODE FAST 600V 1A NPb DO-41 1 D1 ST STTH1R06
DIODE ULT FAST 600V 1A NPb SMA 1 D2 ST MICROELECTRONICS STTH1L06A
DIODE SKY RECT 60V 2A NPb DO-214AC 1 D3 MICRO COMMERCIAL(MCC) SS26-TP
DIODE FAST SW 75V 350mW NPb SOD123 1 D4 DIODES INC 1N4148W-7-F
DIODE SWT 250V 0.4A NPb SOT-23 1 D5 DIODES INC BAV23S-7-F
DIODE RECT 30V 1A NPb SOD-323 2 D6 D8 DIODES INC SBR130S3-7
DIODE RECT 400V 1A NPb SMA 1 D7 DIODES INC S1G-13-F
FUSE 1A 250V TLAG NPb RAD 1 F1 LITTLE FUSE 39211000440
IND 4.7mH ±10% 17.6 OHM 350 DIA TH 2 L1 L2 COILCRAFT RFB0807-472L
XFMR 6.8mH ±10% 10KHz NPb TH 1 L3 KUNSHAN EAGERNESS RM05-CL01
THERM 100K OHM ±5% 0.10mA NPb 0603 1 NTC MURATA NCP18WF104J03RB
TRAN MOSFET nCH 60V.2A NPb SOT23-3 1 Q1 DIODES INC ZVN4106FTA
TRAN MOSFET nCH 1.0A 600V NPb DPAK 1 Q2 ST MICROELECTRONICS STD1NK60T4
TRAN MOSFET nCH 0.38A 500V NPb TO92 1 Q3 FAIRCHILD FQN1N50CTA
TRAN MOSFET nCH 1A 800V NPb DPAK 1 Q4 ST MICROELECTRONICS STD1NK80ZT4
RES 4.7k OHM 1/4W ±5% 1206 FILM 2 R1 R2 DALE CRCW1206472J
RES 4.70K OHM 1/10W ±1% NPb 0603 1 R3 PANASONIC ERJ3EKF4701V
RES PWR 2.0K OHM 2W ±5% NPb AXL 3 R4 R6 R16 VISHAY PR02000202001JR500
RES 27K OHM 1/8W ±1% NPb 0805 1 R5 PANASONIC ERJ6ENF2702V
RES 1.50M OHM 1/4W ±1% NPb 1206 4 R7 R8 R14 R15 PANASONIC ERJ8ENF1504V
RES 47 OHM 1/10W ±1% NPb 0603 3 R9 R19 R24 PANASONIC ERJ3EKF47R0V
RES 22.0 OHM 1/10W ±1% NPb 0603 1 R10 PANASONIC ERJ3EKF22R0V
RES 22.1k OHM 1/10W ±1% NPb 0603 2 R11 R17 DALE CRCW060322K1FKEA
RES 51.0 OHM 1/10W ±1% NPb 0603 1 R12 PANASONIC ERJ3EKF51R0V
RES 120K OHM 1/10W ±1% NPb 0603 1 R13 PANASONIC ERJ3EKF1203V
RES 14k OHM 1/10W ±1% NPB 0603 FILM 1 R18 DALE CRCW060314K0FKEA
RES 1k OHM 1/10W ±1% NPb 0603 FILM 1 R20 DALE CRCW06031K00FKEA
RES 10.5 OHM 1/4W ±1% NPb 1206 1 R21 DALE CRCW120610R5FKEA
RES 69.8k OHM 1/10W ±1% NPb 0603 1 R22 DALE CRCW060369K8FKEA
RES 5.6k OHM 1/10W ±5% NPb 0603 FLM 1 R23 DALE CRCW06035K60JNEA
XFMR 14.5mH ±10% 10KHz NPb TH 1 T1 KUNSHAN EAGERNESS RM06-CL01
IC CRUS DIMMER LED DRVR NPb SOIC16 1 U1 CIRRUS LOGIC CS1611-FSZ/B1
DIODE ZENER 16V 1W NPb DO-214AC 1 Z1 MICRO COMMERCIAL SMAZ16-TP
DIODE TVS 300V 600W NPb DO-204AC 1 Z2 LITTELFUSE P6KE350A

GRM31BR72J103KW01L

DS975RD5 5

6 DS975RD5

1 2

1 2

1

2

1 2

123

1

2

1

2

1

2

4

5

1 2

3

4

7

8

1

2

1

2

1

2

1

2

1

2

1

2

4. BOARD LAYOUT

CRD1611-8W

Figure 3. PCB Dimensions

DS975RD5 7

Figure 4. Top Silkscreen

CRD1611-8W

8 DS975RD5

Capacitor C12 added between D7 and R1

Figure 5. Bottom Silkscreen

CRD1611-8W