CRD1601-120W CS1601 120W, High-efficiency PFC + Fluorescent Lamp Driver Reference Design Features General Description  Line Voltage Range: 108 to 305 VACrms The CRD1601-120W board demonstrates the perfor- mance of the CS1601 digital PFC controller in an  Output Voltage (V ): 460V electronic ballast application. The CRD1601 uses a res- link onant second stage driver to power up to two T5  Rated Maximum P : 120W fluorescent lamps. The CRD1601 has been designed to in fit into a slimline T5 fluorescent electronic ballast form-  Spread Spectrum Switching Frequency factor.  Integrated Digital Feedback Control ORDERING INFORMATION  Low Component Count CRD1601-120W PFC Customer Reference Design Actual Size: 356 mm x 27 mm 14.0 in x 1.07 in Copyright  Cirrus Logic, Inc. 2011 MAR ‘11 www.cirrus.com (All Rights Reserved) DS931RD3

CRD1601-120W 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, heat sinks or metallic parts may be extremely hot to touch when electrically active. Heatsinking is required for Q4 & Q5. The end product should use tar pitch or an equivalent compound for this purpose. For lab evaluation purposes, a fan is recommended to provide adequate cooling. 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 con- sent 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 PROP- ERTY 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 MERCHANT- ABILITY 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, IN- CLUDING ATTORNEYS' FEES AND COSTS, THAT MAY RESULT FROM OR ARISE IN CONNECTION WITH THESE USES. Cirrus Logic, Cirrus, and the Cirrus Logic logo designs 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. 2 DS931RD3

CRD1601-120W 1. INTRODUCTION The CS1601 is a high-performance Variable Frequency Discontinuous Conduction Mode (VF-DCM), ac- tive Power Factor Correction (PFC) controller, optimized to deliver the lowest PFC system cost for elec- tronic ballast applications. The CS1601 uses a digital control algorithm that is optimized for high efficiency and near unity power factor over a wide input voltage range (108-305 VAC). The CS1601 uses an adaptive digital control algorithm. Both the ON time and the switching frequency are varied on a cycle-by-cycle basis over the entire AC line to achieve close to unity power factor. The varia- tion in switching frequency also provides a spread frequency spectrum, thus minimizing the conducted EMI filtering requirements. The feedback loop is closed through an integrated digital control system within the IC. Protection features such as overvoltage, overcurrent, overpower, open circuit, overtemperature, and brownout help protect the device during abnormal transient conditions. Details of these features are provided in the CS1601 data sheet. The CRD1601-120W board demonstrates the performance of the CS1601 over a wide input voltage range. This board has been designed to generate 460V from the PFC stage, which is then processed by the resonant driver, to power up to two T5 lamps connected in series, for a total output of 108W. Extreme caution needs to be exercised while handling this board. This board should be energized by trained professionals only. Terminal block J1 is used to connect the AC line. The lamp is connected to terminal J2 as shown in the schematic. J1 J2 AC Line Output Input Terminals Figure 1. Board Connections DANGER High Voltage Hazard ONLY QUALIFIED PERSONNEL SHOULD HANDLE THE CRD1601-120W. Warning: Heatsinking is required for Q4 & Q5. The end product should use tar pitch or an equivalent compound for this purpose. For lab evaluation purposes, a fan is recommended to provide adequate cooling. DS931RD3 3

CRD1601-120W 2. SCHEMATIC CHK BY/DATEINC BY/DATEDESCRIPTIONREVECO# GPGPINITIAL DESIGNA08/10/201008/10/2010A. GARZAGPLAYOUT CHANGE TO ELIMINATE FLICKERBECO80712/1/1012/1/10GPGPSCHEMATIC CHANGE TO IMPROVE PERFORMANCEB1ECO82001/14/1101/14/11GPA. GARZACHGD R32 TO 499 OHMSECO825B201/28/1101/28/11 DARREN B.REPLACE OBSOLETE PART C13 WITH 011-00048-Z1COLIN LAMBERTECO839C03/15/1103/15/11CHGD CIRRUS DEVICE FROM A1 TO A2D112D21N4006G-T12VLINK_JMP[2]MURS360T3G600V 2DQ1R24STB13NM60N1C60GS347uFJMP8250V1.6" JUMPER20KR2C17ELEC47uFTYPICAL VLINK 460VR35250VMAX DC LOAD 120 W1.15M R4GNDR38R40R41R3924.9R320.240.240.10.12WR362W1W1W499NO POPNO POPNO POP1.15M R371.15M JMP20.800" WIRE JUMPER VDD_JMP[2]R14C4X7R2200pF20 C10COG1000pF C2C5R1333pFX7R1.78K4.7uFCOG GND PART #600-00467-Z1REV C DESCRIPTION:SCHEMATIC CRD1601-120W-Z SHEET TITLE:CRD1601-120W PFC FOR FLUORESCENT BALLAST GPGPENGINEER:DRAWN BY: SIZE B2101/07/2010DATE:OFSHEET L2380uH 2011 69 DNG 284V415D47LL1 RER10PM917.8KPUMJJ "5.1 C11X7RU12200pFCS1601-FSZ81VDDIFB72GDSTBY36IACGND45CSZCD MH3MH4MH2 111 FD1FD2FD3 REPMUJ "5.1 REPMUJ ERIW "0.1 R121.15M 6PMJ R331.15M 01PMJ R341.15M R11K C32C0G330pF GND MH1 C31PLYFLM0.33uF GND 2 1+ - 4 D3GBU4J-BP600V3 75 75 2 NO POP NO POP L5 1mH LY R29 R28 1 C8 0.22uF DANGER! HIGH VOLTAGE! 460 VOLT FOR USE BY TRAINED PROFESSIONALS ON NO POPL64mH 12 108-305 VAC3445 - 65 HzF23.15A C29C33CERCER1122200PF2200PFNO POPRV1J6S14K300TERM BLKLINECHGND1342C27C30GROUND2CERCER2200PF2200PFCHGNDNEUTRALNO POP3L35mH CHGND HARDWARE AND DOCUMENTATION 600-00467-Z1SCHEMATIC DWG 603-00467-Z1ASSY DWG-240-00467-Z1PCB DWG- SJ61A3STANDOFF-ADHESIVE-RUBBER-375x250-Z422-00013-01LBL SUBASSY PROD ID AND REV NOTES: UNLESS OTHERWISE SPECIFIED; 1. ALL RESISTOR VALUES ARE IN OHMS. 4 DS931RD3

CRD1601-120W J21 2 3 4 5 6 6 POS TRMBLK REV C 22OF ALLAST SHEET B [1] 0.15uFPLYFLM 0.15uFPLYFLM SCENT SIZE B JMP71.25" WIRE JUMPER VDD_JMP R8330K T1C12 107 3C726 95 TSD-2709C15CER330Pf GND_JMPGND_JMP C140.15uFPLYFLM PART #600-00467-Z1 SHEET TITLE:PFC FOR FLUORE DATE:01/07/2010 R30 Z9 1N4148W C16POLY 0.1uF 2 1 0 W TEST-POINT-BLACK-ZTEST-POINT-BLACK-Z TP2TP1NO POPNO POPZ1Z21212 1N4148W1N4148W JMP1R172.7" WIRE JUMPER VLINK_JMP[1]VLINK[2]61.9kZ14332C20R18X7R8.25k0.022UF1N414812DQ4R114GNDGNDSPP04N60C3711GSDFE23D8RPCSVV10C19GH5X7RGND111000pFSH2U2C2565JMP5GL1DX7RQ511UBA2014T_N1-518_SOIC16-Z-R25C90.33UF125SPP04N60C31ACM1V6X7R1B51CTGS-1Z5600pF9532FVDD50.750" WIRE JUMPERV2ZB151.3" JUMPERCSPWF16SECSNSFVRR26CCLI 32431JMP449.9R27C26R22R23150X7R33R19R3C22C210.10uF33.2k2X7RCOG0.22UF100pF GNDGNDGNDGNDR16GND 8.25kC18X7R0.068UF VLINK[2] R7GND330K FRpR203E01C7C2 221k 1R21C24Z13C28C238.06kX7R200VB32612X7RJMP36800pFES1D4.7nF0.056UF0.750" WIRE JUMPER2 GNDGNDGND_JMPGND_JMPGND_JMPGNDGND_JMP Y L 0 VOLT SSIONALS ON R5 1B4C14V3X7R24Z510.33UFN12 GNDGND C3X7R0.33UFGND 6 E 4 F E! RO G P NGER! HIGH VOLTA R USE BY TRAINED TYPICAL VLINK 460VMAX DC LOAD 120 W VCC A O D F DS931RD3 5

CRD1601-120W 3. BILL OF MATERIALS T Notes ECO0839 ECO0839 NO POP FORM LEADS TO MATCH LAYOU SEE ASSY DWG FOR LENGTH NO POP INSTALL RUBBER FEET SJ61A3 D MFG P/NC1206C334K5RACC1206C330J5GACC1206C222K5RACC3216X7R1E475MUVZ2E470MHDB32529C3154KB32912B3224MC1206C562K5RACC1206C102K5GACCK45-R3AD271K-NRCK45-R3DD331K-NRECQE6104KFC1206C683K5RAC562R5TSD10C1206C223J5RACC1206C101J5GACC1206C224K5RACC1206C563K5RACC1206C682K5RACGRM188R71E104KA01VY1222M47Y5UQ63V0B32612A1472J008VY1222M47Y5UQ63V0ECQE6334KFC315C331J1G5CA 1N4006G-TMURS360T3GGBU4J-BPLL414837213150411172705217160300003050/1 BK005 RLCS-1005TSD-27962124-V-RCRL-4400-2-4.00 1809STB13NM60NSPP04N60C3CCF551K00FKE36CRCW120620K0FKEACRCW12062R00FKEACRCW120624R9FKEACRCW120633R0JNEAERD-S2TJ334VCRCW120617K8FKEACRCW12061M15FKEACRCW12061K78FKEACRCW120620R0FKEACRCW12068K25FKEACRCW120661K9FKEACRCW120633K2FKEACRCW1206221KFKEACRCW12068K06FKEAERJ14YJ3R0UCRCW12060000Z0EACRCW120649R9FKEA 1 of 2) MFGKEMETKEMETKEMETTDKNICHICONEPCOSEPCOSKEMETKEMETTDKTDKPANASONICKEMETVISHAY/SPRAGUEKEMETKEMETKEMETKEMETKEMETMURATAVISHAYEPCOSVISHAYPANASONICKEMET DIODES INCON SEMICONDUCTORMICRO COMMERCIAL CODIODES INCLITTLE FUSEPHOENIX CONTACTWEIDMULLERALPHA WIRE COMPANY RENCOPREMIER MAGNETICSBOURNSRENCO KEYSTONEST MICROELECTRONICSINFINEONVISHAYDALEDALEDALEDALEPANASONICDALEDALEDALEDALEDALEDALEDALEDALEDALEPANASONICDALEDALE e AL (Pag P6 JMP7 RI M BILL OF MATE Reference DesignatorC1 C3 C25C2C4 C11C5C6 C17C7 C12 C14C8C9C10C13C15C16C18C19C20C21C22C23C24C26C27 C29C28C30 C33C31C32 D1D2D3D4F2J2J6JMP1 JMP2 JMP3 JMP4 JMP5 J0JMP8 JMP9 JMP1L2L3L5L6 MH1 MH2 MH3 MH4Q1Q4 Q5R1R2R3 R11 R25R4R5R7 R8R10R12 R33 R34 R35 R36 R37R13R14R16 R18R17R19R20R21R22 R23R24 R30R26 Qty3121231111111111111101211 111111110 1110 012113112161121111221 DescriptionCAP 0.33uF ±10% 50V X7R NPb 1206CAP 33pF ±5% 50V C0G NPb 1206CAP 2200pF ±10% 50V X7R NPb 1206CAP 4.7uF ±20% 25V X7R NPb 1206CAP 47UF ±20% 250V ELEC NPb RADCAP 0.15uF ±10% 250V POLY NPb RADCAP 0.22uF ±20% 330V PLY FLM NPb THCAP 5600pF ±10% 50V X7R NPb 1206CAP 1000pF ±10% 50V C0G NPb 1206CAP 270pF ±10% 1kV CER NPb RADCAP 330pF ±10% 2kV CER NPb RADCAP 0.1uF ±10% 630V POLY NPb RADCAP 0.068uF ±10% 50V X7R NPb 1206CAP 1000PF ±10% 500V X7R NPb RADCAP 0.022uF ±5% 50V X7R NPb 1206CAP 100pF ±5% 50V C0G NPb 1206CAP 0.22uF ±10% 50V X7R NPb 1206CAP 0.056uF ±10% 50V X7R NPb 1206CAP 6800pF ±10% 50V X7R NPb 1206CAP 0.10uF 10% 25V X7RLESR NPb 0603CAP 2200pF ±20% DISC 500V RAD NPbCAP 4.7nF ±5% 1600V POLY NPb RADCAP 2200pF ±20% DISC 500V RAD NPbCAP 0.33uF ±10% 630V POLY NPb RADCAP 330pF ±5% 100V C0G C315 NPb TH DIODE RECT 800V 1A 200mA NPb DO-41DIODE RECT 600V 4A ULT FST NPb SMCDIODE RECT BRIDGE 600V 4A NPb GBUDIODE SS 75V 500mW NPb SOD80FUSE 3.15A TLAG IEC NPb SHORT TR5CON TERM BLK 6X1 FML RA GRN NPb THCON 3POS TERM BLK 5.08mm SPR NPb RAWIRE 24 AWG SOLID PVC INS BLK NPb XFMR 380uH 10% .265O NPb THXFMR 5mH 1:1 1500Vrms 4PIN NPb THIND 1mH 1.3A ±15% TOR VERT NPb THXFMR COMMON MODE CHOKE 1.3 A TH NPb SPCR STANDOFF 4-40 THR .875L AL NPbTRAN MOSFET nCH 11A 600V NPb D2PAKTRAN MOSFET nCH 69W NPb TO220-3RES 1K 1/4W ± 1% METAL FILM NPb AXLRES 20K OHM 1/4W ±1% NPb 1206 FILMRES 2.00 OHM 1/4W ±1% NPb 1206RES 24.9 OHM 1/4W ±1% NPb 1206 FILMRES 33 OHM 1/4W ±5% NPb 1206 FILMRES 330K OHM 1/4W ±5% CARFL NPb AXLRES 17.8K OHM 1/4W ±1% NPb 1206RES 1.15M OHM 1/4W ±1% NPb 1206RES 1.78K OHM 1/4W ±1% NPb 1206RES 20 OHM 1/4W ±1% NPb 1206 FILMRES 8.25K OHM 1/4W ±1% NPb 1206RES 61.9K OHM 1/4W ±1% NPb 1206RES 33.2K OHM 1/4W ±1% NPb 1206RES 221K OHM 1/4W ±1% NPb 1206 FILMRES 8.06K OHM 1/4W ±1% NPb 1206RES 3 OHM 1/2W ±5% NPb 1210 FILMRES 0 OHM 1/4W NPb 1206 FILMRES 49.9 OHM 1/4W ±1% NPb 1206 FILM RevAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAA AAAA AAAAAAAAAAAAAAAAAAAAA C _ EV Z1Z1Z1Z1Z1Z1Z1 Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1 Z1Z1Z1Z1Z1Z1Z1Z1 Z1Z1Z1Z1 Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1Z1 S LOGIC01-120W_R Cirrus P/N001-10235-001-05280-001-06276-001-10233-012-00186-013-00037-011-00064-001-06516-001-06036-011-00048-011-00046-013-00027-001-06838-011-00045-001-06709-001-05542-001-06948-001-06821-001-06548-001-10225-011-00049-013-00026-011-00049-013-00034-011-00059- 070-00132-070-00166-070-00157-070-00001-180-00022-110-00321-110-00301-080-00013- 050-00050-050-00039-040-00127-050-00047- 304-00001-071-00108-071-00082-030-00010-020-06310-020-06347-020-06337-021-00544-031-00052-020-06390-020-06356-020-06391-020-06324-020-06343-020-06345-020-06346-020-06342-020-06344-021-06319-020-02273-020-02467- CIRRUCRD16 Item12345678910111213141516171819202122232425 2627282930313233 34353637 383940414243444546474849505152535455565758 6 DS931RD3

CRD1601-120W G N WI A otes O POPCO0825 O POPO POP O POPCO0839 EE ASSEMBLY DR CO0820/0825/0839 N NE NN NE S E AAA EEE MFG P/NCRCW1206150RFKCRCW120675R0FKCRCW1206499RFKG003R1000FE7080G003R1000FE7080ERJ1TRQFR24US14K300TSD-27095001CS1601-FSZ/A2UBA2014T/N1,518SJ61A31N4148W-7-F1N5244BES1DBZV55-B15,115603-00467-Z1422-00013-01240-00467-Z1600-00467-Z1 R O TR CO UT DC NU OD CN of 2) MFGDALEDALEDALEVISHAYVISHAYPANASONICEPCOSPREMEIRKEYSTONECIRRUS LOGICNXP3MDIODES INCFAIRCHILD SEMITAIWAN SEMICONXPCIRRUS LOGICCIRRUS LOGICCIRRUS LOGICCIRRUS LOGIC 2 e g a P L ( A RI E T A BILL OF M Reference DesignatorR27R28 R29R32R38R39R40 R41RV1T1TP1 TP2U1U2XMH1 XMH2 XMH3 XMH4Z1 Z2 Z9 Z14Z3Z13Z16 Qty1011001101144111REF1REFREF DescriptionRES 150 OHM 1/4W ±1% NPb 1206 FILMRES 75 OHM 1/4W ±1% NPb 1206 FILMRES 499 OHM 1/4W ±1% NPb 1206 FILMRES 0.1 OHM 2W ±1% WW NPb AXLRES 0.1 OHM 2W ±1% WW NPb AXLRES 0.24 OHM 1W ±1% NPb 2512VARISTOR 470V RMS 14MM NPb RADXFMR 1.3mH 2000Vac 10PIN NPb THCON TEST PT .1"CTR TIN PLAT NPb BLKIC CRUS LPWR FACTOR CORR NPb SOIC8 IC CNTL BALLAST 600V NPB SOIC16FEET PROT ADH BACK .375x.25 BLK NPbDIODE FAST SW 75V 350mW NPb SOD123DIODE ZEN 14V 15OHM 500mW NPb DO-35DIODE RECT 200V 1A SMA NPb DO-214ACDIODE ZENER 500mW 15V 8.5mA MINIMLFASSY DWG CRD1601-120W-Z-NPbLBL SUBASSY PRODUCT ID AND REVPCB CRD1601-120W-Z-NPbSCHEM CRD1601-120W-Z-NPb RevAAAAAAAAAA2AAAAAACCCC C _ S LOGIC01-120W_REV Cirrus P/N020-02520-Z1020-02488-Z1020-02581-Z1030-00091-Z1030-00091-Z1020-06372-Z1036-00015-Z1050-00042-Z1110-00045-Z1065-00331-Z3060-00477-Z1305-00005-Z1070-00007-Z1070-00194-Z1070-00196-Z1070-00195-Z1603-00467-Z1422-00013-01240-00467-Z1600-00467-Z1 CIRRUCRD16 Item5960616263646566676869707172737475767778 DS931RD3 7

CRD1601-120W 4. BOARD LAYOUT ) p ) o p T o ( T sk n ( a e M e r r c e s d k ol Sil e 2. S re 3. r u u g Fig Fi 8 DS931RD3

CRD1601-120W ) m ) m o ) otto Bott om) tom (B k ( ott Bot uting e Mas en (B ask ( o t e M R as cr r cuit er P Silks olde gure 4. Cir ure 5. Sold Figure 6. Figure 7. S Fi g Fi DS931RD3 9

CRD1601-120W 5. PERFORMANCE PLOTS 1.00 .99 r o .98 t c a F r e w o .97 P .96 .95 100 120 140 160 180 200 220 240 260 280 300 Input Voltage (VAC) Figure 8. Power Factor vs. AC Input Voltage 10% 9% 8% 7% 6% D H 5% T 4% 3% 2% 1% 0% 100 120 140 160 180 200 220 240 260 280 300 Input Voltage (VAC) Figure 9. THD vs. AC Input Voltage 10 DS931RD3

CRD1601-120W 120 118 116 114 ) W r (112 e w o110 P t u108 p n I 106 104 102 100 100 120 140 160 180 200 220 240 260 280 300 Input Voltage (VAC) Figure 10. Input Power vs. AC Input Voltage DS931RD3 11

CRD1601-120W 6. REVISION HISTORY Revision Date Changes RD1 FEB 2011 Initial Release. RD2 FEB 2011 Minor BOM & schematic change to eliminate possible flicker. RD3 MAR 2011 Updated BOM, Schematic, and layers to rev C (rev A2 Cirrus device). 12 DS931RD3