Cirrus Logic CRD1680-7W User Manual

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CRD1680-7W

1.102 28mm1.024 26mm0.672 17mm

7 Watt Reference Design

CRD1680-7W

Features

• Constant-current Output

• Flicker-free Dimming

• Line Voltage 12VAC/VDC, ±10%

• Rated Input Power: 7.0 W

• Rated Output Power: 5.6W

• Output Voltage: <15 V

• High Efficiency with Magnetic and Electronic
Transformers

• Low Component Count

• Supports Cirrus Logic Product CS1680

General Description

The CRD1680-7W reference design demonstrates the
performance of the CS1680 dimmable LED driver for
low-voltage lighting with a target output of 430mA driving
4LEDs in series
and multi-lamp transformer compatibility for non-dimmer
systems and dimmer systems paired with electronic and
magnetic low-voltage transformers
targeted to fit into MR16 LED lamp applications.

DIMENSIONS (OVERALL)

Length Width Height

For more information, see Figure 3 on page 6.

ORDERING INFORMATION

CRD1680-7W-Z 7 Watt Reference Design Supports CS1680

. It

provides exceptional single-lamp

. The form factor is

Cirrus Logic, Inc.

http://www.cirrus.com

Copyright  Cirrus Logic, Inc. 2014

(All Rights Reserved)

AUG‘14

DS1017RD3

CRD1680-7W

IMPORTANT SAFETY INSTRUCTIONS

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

his Engineering Evaluation Unit or Demonstration Board must only be used for assessing IC performance in a

aboratory setting. This product is not intended for any other use or incorporation into products for sale.

his product must only be used by qualified technicians or professionals who are trained in the safety procedures

ssociated with the use of demonstration boards.

Risk of Electric Shock

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 terminals of any components.

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 power source.

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

omply 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.

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, and the EXL Core 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.

R

T
l

T
a

x

x

x

x

x

x

c

2 DS1017RD3

,

CRD1680-7W

1. INTRODUCTION

The CS1680 is a cascade boost-buck dimmable LED controller IC. The CS1680 uses a Cirrus Logic proprietary in­telligent digital control that provides exceptional single-lamp and multi-lamp transformer compatibility for non­dimmer systems and dimmer systems paired with electronic and magnetic low-voltage transformers. The CS1680
integrates a continuous conduction mode (CCM) boost converter that provides transformer compatibility and dimmer
compatibility with a constant output current buck stage. An adaptive digital algorithm controls the boost stage and
dimmer compatibility operation mode to enable flicker-free operation down to 5% output current with leading-edge
and trailing-edge dimmers. For in-depth implementation of the CS1680, please consult documents in Further Read­ing on page 3 for IC and reference design details.

The CRD1680-7W 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. Protection algorithms such as output open/ short, overcur­rent detection, boost overvoltage, and overtemperature thermistors protect the system during abnormal conditions.
Details of these features are provided in the CS1680 Dimmable LED Driver IC for Low-voltage Lighting data sheet.

The CRD1680-7W board demonstrates the performance of the CS1680. 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 CS1680 dimmable LED
controller IC.

LEDs in series at a target output current of 430mA (12.0V typical).

Extreme caution needs to be exercised while handling this board. This board is to be used by trained professionals
only.

Further Reading

• Cirrus Logic, 2014. “Dimmable LED Driver IC for Low-voltage Lighting,” DS1055F1, AUG 2014.

• Cirrus Logic, 2014. “Design Guide for a CS1680 Dimmable LED Driver IC for Low-voltage Lighting,”

AN379REV3, AUG 2014.

NOTE

If any other Cirrus Logic document contains information conflicting with the device data sheet,

the device data sheet is considered to have the most current and correct data.

DS1017RD3 3

600-00697-Z1 REV_F1

D.PAPANDREA/JDG D.PAPANDREA

SHEET

OFSHEET

ENGINEER

DATE

DRAWN BY

PART #

SHEET

8/14/2014

CRD1680-7W-Z

11

TITLE

SIZE

B

08/07/13INITIAL RELEASEA.0

DATEDESCRIPTIONREV

C20 now Throug h Hole

1127 B.1

ADDED RED AND BLACK WIRES 09/10/13

B.2 10/08/13Changing the silicon to B1 and some components values

1136

C.0 11-19-13ADDED R11 & C12

1153

1165

D.0 ADDED R12 & R16. CHANGED D11/D13,U2,R11,C12 12/16/13

1194

E.0 change C12 from SMD0805 To through hole TDK FK16X7R1H105K 03/11/14

VIN+

VIN-

1225

F CHANGES TO COMPLY WITH RADIATED EMI 07/11/14

LED OUTPUT

LED OUTPUT

1235

F1 C HANGED FB1,FB2 AND R102 08/12/14

-t

NTC1 100K

0.1mA

12

D3

PMEG4050EP,115

40V

12

D4

PMEG4050EP,115

40V

12

D6

PMEG4050EP,115

40V

12

D5

PMEG4050EP,115

40V

12

D1

PMEG4020EP,115

40V

12

D2

PMEG4020EP,115

40V

L1

15uH

1

G

2

S

3

D

Q1

IRLML0040TRPBF

R1

0.16 Ohm

R2

0.51 Ohm

R14

22 OHM

R17

10

R20

10

C16

NO POP

0603

C8

NO POP

0603

C6

180uF

ELEC

35V

L2

47uH

1

CTRL2

2

EOTP

3

BSTSENSE

4

GND

5

BSTGD

6

VDD

7

GPIO

8

NC

9

BUCKZCD

10

NC

11

CLAMP

12

BUCKGD

13

BUCKSENSE

14

VAC

15

BSTOUT

16

CTRL1

U1

CS1680-FZZ TSSOP16

1

G

2

S

3

D

Q3
IRLML0040TRPBF

C13

1000pF

X7R

R35
NO POP

1

B

2

E

3

C

Q4

PMBT4401,215

L

N

+

-

R3

5.11K

12

D9

BZV55-C6V2,115

12

D7

BZV55-C16,115

C4

0.10uF

X7R

R4
20K

12

D13

BAS52-02V H6327

45V

12

D11

BAS52-02V H6327

45V

1

B

2

E

3

C

Q5
PMBT4401,215

R13

35.7K

R26

2K

R10
604K

R8

604K

R7

93.1

1

G

2

S

3

D

Q2
IRLML0040TRPBF

R5

6.65K

R6

35.7K

C2 27pF

COG

R15

35.7K

C10

10uF

X7R

C7

4.7uF

X7R

R9

0

C3

0.10uF

X7R

C21

1uF

X7R

C9

100pF

COG

C20

0.68UF

MLCC

R31

49.9K

R32

47.5K

C5

0.10uF

X7R

C1

10uF

X7R

C11

NO POP

0603

FB1

120OHM@100MHz

PCB DWG-

240-00697-Z1

ASSY DWG-

603-00697-Z1

SCHEMATIC DWG

600-00697-Z1
LBL SUBASSY PROD ID AND REV
WIRE-RED-STR-28AWG

080-00043-Z1

WIRE-BLACK-STR-28AWG

080-00044-Z1

R11
1

C12

1UF

MLCC

R1251.1

R160

1

NC

2

A

3

GND

4

Y

5

VCC

U2

SN74LVC1G14MDBVREP

FB2

120OHM@100MHz

C17

10uF

X7R

C14

0.10uF
X7R

R10222 OHM

R18

93.1

4 DS1017RD3

2. SCHEMATIC

CRD1680-7W

Figure 1. Schematic

3. BILL OF MATERIALS

Line Ite m Descri ption Qty UM Reference Designator Manufacturer Manufacturer Part Number

0002 CAP 10uF ±10% 25V X7R NPb 1206 2

C1 C10

0003 CAP 27pF ±5% 50V C0G NPb 0603 1 EA

C2

KEMET

C0603C270J5GAC

0004 CAP 0.10uF 10% 25V X7RLESR NPb 0603 4

C3 C4 C5 C14

0005 CAP 180uF ±20% 35V AL ELEC NPb RA D 1 EA

C6

PANASONIC

EEUFR1V 181B

0006 CAP 4.7uF ±10% 35V X7R NPb 0805 1

C7

0008 CAP 100pF ±5% 50V C0G NPb 0603 1 EA

C9

KEMET

C0603C101J5GAC

0009 CAP 1uF ±10% 50V X7R NPb RAD 1

C12

0010 CAP 1000pF ±10% 50V X7R NPb 0603 1 EA

C13

KEMET
KOA
PANASONIC

C0603C102K5RAC
X7R0603HTTD102K
ECJ1VB1H102K

0011 CAP 10uF ±10% 35V X7R MLC NPb 1206 1

C17

0012 CAP 0.68uF ±10% 50V X7R NPb RAD 1

C20

0013 CAP 1uF ±10% 25V X7R CER NPb 0603 1

C21

0014 DIODE SKY BARR 2A 40V NPb SOD128 2

D1 D2

0015 DIODE SKY BARR 5A 40V NPb SOD128 4

D3 D4 D5 D6

0016 DIODE ZENER 500mW 16V NPb SOD80C 1

D7

0017 DIODE ZENER 500mW 6.2V NPb S OD80C 1

D9

0018 DIODE SHKY 750mA 45V NPb SC79-2 2

D11 D13

0019 FE BEAD 3.0A 120ohm@100MHz NPb 0805 2

FB1 FB2

0021 IND PWR 15uH 2.4A ±20% SHLD NPb SM 1

L1

0022 IND PWR 47uH 1.3A ±20% SHLD NPb SM 1

L2

0023 THERM 100K OHM ±5% 0.10mA NPb 0603 1

NTC1

0024 TRAN MOSF ET N-CH 40V 3.6A NPb SOT23 3

Q1 Q2 Q3

0025 TRAN NPN SW 40V 600mA NP b SOT-23 2

Q4 Q5

0026 RES 0.16 OHM 1/ 4W ±1% NP b 0805 1

R1

0027 RES 0.51 OHM 1/ 4W ±1% NP b 0805 1

R2

0028 RES 5.11k OHM 1/10W ±1% NPb 0603 1 EA

R3

DALE
KOA
PANASONIC

CRCW06035K 11FKEA
RK73H1JTTD5111F
ERJ3EKF5111V

0029 RES 20k OHM 1/ 10W ±5% NP b 0603 FILM 1 EA

R4

DALE
KOA

CRCW060320K 0JNEA
RK73B1JTTD203J

0030 RES 6.65k OHM 1/10W ±1% NPb 0603 1

R5

0031 RES 35.7K OHM 1/10W ±1% NPb 0603 3

R6 R13 R15

0032 RES 93.1 OHM 1W ±1% FILM NPb 2512 2

R7 R18

0033 RES 604K OHM 1/ 10W ±1% NPb 0603 2

R8 R10

0034 RES 0 OHM 1/10W ±5% NPb 0603 FILM 2 EA

R9 R16

NIC COMPO NENTS
PANASONIC
VENKEL

NRC0606ZOTRF
ERJ3EKF0R00V
CR0603-10W-000T

0035 RES 1 OHM 1/4W ±1% NPb 0805 1

R11

0036 RES 51.1 OHM 1/ 10W±1% NP b 0603 FILM 1 EA

R12

KOA
PANASONIC

RK73H1JTTD51R1F
ERJ3EKF51R1V

0037 RES 22.0 OHM 1/ 10W ±1% NP b 0603 2

R14 R102

0038 RES 10 OHM 1/10W ±1% NPb 0603 FILM 2 EA

R17 R20

VENKEL
PANASONIC

C0603-10W-10R0FT
ERJ3EKF10R0V

0039 RES 2k OHM 1/ 10W ±5% NP b 0603 FILM 1 EA

R26

KOA
PANASONIC

RK73B1JTTD202J
ERJ3GEYJ202V

0040 RES 49.9k OHM 1/10W ±1% NPb 0603 1 EA

R31

KOA
PANASONIC

RK73H1JTTD4992F
ERJ3EKF4992V

0041 RES 47.5k OHM 1/10W ±1% NPb 0603 1 EA

R32

KOA
PANASONIC

RK73H1JTTD4752F
ERJ3EKF4752V

0043 IC CRUS TRIAC DIM LV 12V NPb TSOP 16 1

U1

0044 IC INV SNGL SCHMIT-TRIG NPb SOT23-5 1

U2

0045 WIRE 28AW G PTFE INSULATED STRND RED 3 IN W 1 A NY SOURCE 080-00043-Z1

0046 WIRE 28AW G PTFE INSUL STRND BLACK 3 IN W 2

Figure 2. Bill of Materials

Date Gene rated: 08/14/2014

CRD1680-7W

BOM: CRD1680-7W-Z Rev: F1

EA

EA

EA

EA

EA
EA
EA
EA
EA
EA
EA
EA
EA
EA
EA
EA
EA
EA
EA
EA

EA
EA
EA
EA

EA

EA

EA
EA

TAIYO YUDEN TMK316B7106KL-TD

NIC COMPONENTS
MURATA GRM188R71E104KA01D

PANASONIC
TDK C2012X7R1V475K125AC

Walsin
TDK FK16X7R1H105K

NIC COMPONENTS
TAIYO YUDEN GMK316AB 7106KL-TR
TDK FK16X7R1H684K
TDK CGA3E1X7R1E105K080A C
NXP PMEG4020EP,115
NXP PMEG4050EP,115
NXP BZV55-C16,115
NXP BZV55-C6V2,115
INFINEON BAS 52-02V H6327
WURTH ELECTRONICS 742792023
TAIYO YUDEN NRS8040T150MJGJ
TAIYO YUDEN NR6045T470M
MURATA NCP18WF104J03RB
INTERNATIONAL RECTIFIER IRLML0040TRPBF
NXP PMBT4401,215
PANASONIC ERJS6SFR16V
PANASONIC ERJS6QFR51V

WALSIN

PANASONIC
DALE CRCW06036K65FKEA
YAGE O RC0603FR-0735K7L
ROHM MCR100JZHF93R1
YAGE O RC0603FR-07604KL
DALE

WALSIN
STACK POLE RNCP0805FTD1R00
DALE

VENKEL
PANASONIC ERJ3EKF22R0V
DALE

WALSIN
DALE

WALSIN
DALE

WALSIN
DALE

WALSIN
CIRRUS LOGIC CS1680-FZZ/B1
TEXAS INSTRUMENTS SN74LV C1G14MDBVREP

ANY S OURCE 080-00044-Z1

NMC0603NPO270J50TRPF

EEUFR1V 181

0603N101J500LT

NMC0603X7R102K50TRPF

WR06X5111FTL

ERJ3GEYJ203V

CRCW06030000Z0EA

WR06X000PTL

CRCW060351R1FK EA

CR0603-10W-51R1FT

CRCW060310R0FK EA

ER06X10R0FTL
CRCW06032K 00JNEA

WR06X202JTL
CRCW060349K 9FKEA

WR06X4992FTL
CRCW060347K 5FKEA

WR06X4752FTL

DS1017RD3 5

6 DS1017RD3

4. BOARD LAYOUT

Figure 3. PCB Dimensions

CRD1680-7W

DS1017RD3 7

Figure 4. Top Silkscreen

CRD1680-7W

8 DS1017RD3

Figure 5. Bottom Silkscreen

CRD1680-7W

DS1017RD3 9

Figure 6. Top Routing, Layer 1

CRD1680-7W

10 DS1017RD3

Figure 7. Power Plane, Layer 2

CRD1680-7W