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reference design al9910 ev 8 non - dimmable 12 0 v ac evaluation board case #1 : ( input=120v ac ; output=48v/ 9 0ma) case #2 : ( input=120v ac ; output=96 v/ 45 ma) a pplications: b10 light bulb s - customer: cree - date: october 2 7 , 2011 this documen t contains diodes confidential and proprietary information
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 2 of 14 table of contents 1. p urpose ................................ ................................ ................................ ................... 3 2. e valuation b oard i nformation ................................ ................................ .............. 4 2.1 al9910 pin assignment and description ................................ ..................... 4 2.2 evaluation board schematic ................................ ................................ .......... 5 2.3 evaluation board bom list ................................ ................................ ............ 6 2.4 evaluation board layouts ................................ ................................ .............. 8 2.5 evaluation board snapshots ................................ ................................ ......... 9 3. led o utput ................................ ................................ ................................ ........... 10 4. e valuation b oard t esting s ummary ................................ ................................ ... 11 4.1 testing results ( case #1): ................................ ................................ ............ 11 4.2 testing results (case #2): ................................ ................................ ............ 12 5. c onclusion ................................ ................................ ................................ ............ 13
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 3 of 14 1. p urpose introduction we are using our al9910 non - dimmable board to evaluate two test condition requirements using high - power leds from cree for functional performance. 1) test condition requirement #1: vin=120v ac ; out=48v/90ma. 2) test condition requireme nt #2: vin=120v ac ; out=96v/45ma. customer: cree features non - dimmable selectable 5w - 8w output power active pfc with power factor >0.9 no electrolytic capacitor high temperature operation l ong operating life typical applications: retrofit b10/ e27 led ligh t bulbs specifications parameter units value ac input voltage v, ac 90 - 140 dc output voltage v, dc 4 0 C 9 8 output c urrent ma 45 - 90 output power w 3 C 6 power factor na >0.9 efficiency % 87% - 90 % operating ambient temperature c - 40 to +8 5 operat ing junction temperature c - 40 to +125 rohs compliance na yes test conditions: input voltage: 120 v ac , 60hz output voltage: 40 v dc - 98 v dc operating ambient temperature: - 40 c to 85 c connection instructi ons: ac+ input: red C hot ac - input: black - n eutral dc led+ output: led+ (red) dc led - output: led - (black) board dimension (components included) : wxlxh (in mm) = 18mm x 25mm x 13mm
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 4 of 14 2. e valuation b oard i nformation 2.1 al9910 pin assignmen t and description al9910 pin assignment al9910 pin description pin name pin number description v in 1 input voltage cs 2 senses led string current gnd 3 device ground gate 4 drives the gate of the external mosfet pwm_d 5 low frequency pwm dimming pin, also enable input. internal 100k pull - down to gnd v dd 6 internally regulated supply voltage. 7.5v nominal for al9910 . can supply up to 1 ma for external circuitry. a sufficient storage capacitor is used to provide storag e when the rectified ac input is near the zero crossings ld 7 linear dimming by changing the current limit threshold at current sense comparator r osc 8 oscillator control. a resistor connected between this pin and ground sets the pwm frequency. so - 8 1 2 3 4 5 6 7 8 ( top view ) cs gate gnd ld v in rosc v dd pwm _ d al 9910
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 5 of 14 2. 2 evaluation board schematic 2.1.1 case #1 => test conditions: v in =120v ac ; out=48v/90ma figure 1: evaluation board schematic (case#1) 2.1.2 case # 2 => test conditions: v in =120v ac ; out=96v/45ma figure 2: evaluation board s chematic (case#2)
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 6 of 14 2. 3 evaluation board bom list case #1 = > test conditions: v in =120v ac ; out=48v/90ma # name quantity part number manufacturer description 1 u1 1 al9910 s - 13 diodes universal high voltage led driver 2 d1,2,3, 4 1 hd02 - t diodes rect bridge gp 200v 0.8a minidip 3 d6 1 mur160 - t diodes diode ultra fast 1a 600v do - 41 4 q1 1 std7nk40zt4 st mosfet n - ch 4 00v 5.4 a dpak 5 c4 1 c0402x7r1a221k vishay cap cer 220pf 10v x7r 01005 6 c3 1 c1608x7r1a105k tdk cap cer 1.0uf 10v x7r 0603 7 r1 1 crcw0402330kfktd vishay res 330 k ohm 1/16w 1% 0402 smd 8 r3 1 crcw04021k00fked vishay res 1.0k ohm 1/16w 1% 0402 smd 9 r2 1 crcw040222r0fked vishay res 22.0 ohm 1/16w 1% 0402 smd 10 r4 1 crcw08051r50fkea vishay res 1.5 ohm 1/ 8 w 1% 0805 smd 11 r6 1 crcw120616r0fkea vishay res 16.0 ohm 1/4w 1% 1206 smd 12 r9 1 CRCW1206510KJNEA vishay res 510k ohm 1/4w 5% 1206 smd 13 r7 1 crcw0402787rfked vishay res 787 ohm 1/16w 1% 0402 smd 14 c1, c2 2 vj1812y104kxetw1bc vishay cap multilay er cer (mlcc) C smd / smt 1812 0.1uf 500volts x7r 10% 1 6 c5 2 umk325c7106mm - t t aiyo cap cer 4.7 uf //4.7 uf 100 v x7r 1 210 16 l1 1 lps5015 - 225ml coilcraft inductor 2.2mh 64ma 17 l2 1 13r475c murata inductor radial 4.7m h 0. 16 a
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 7 of 14 case #2 => test conditions: v in =120v ac ; out=96v/45ma # name quantity part number manufacturer description 1 u1 1 al9910 s - 13 diodes universal high voltage led driver 2 d1,2,3, 4 1 hd02 - t diodes rect bridge gp 200v 0.8a minidip 3 d6 1 mur160 - t diodes diode ultra fa st 1a 600v do - 41 4 q1 1 std7nk40zt4 st mosfet n - ch 4 00v 5.4 a dpak 5 c4 1 c0402x7r1a221k vishay cap cer 220pf 10v x7r 01005 6 c3 1 c1608x7r1a105k tdk cap cer 1.0uf 10v x7r 0603 7 r1 1 crcw0402330kfktd vishay res 330 k ohm 1/16w 1% 0402 smd 8 r3 1 crcw04 021k00fked vishay res 1.0k ohm 1/16w 1% 0402 smd 9 r2 1 crcw040222r0fked vishay res 22.0 ohm 1/16w 1% 0402 smd 10 r4 1 crcw08052r94fkea vishay res 2.94 ohm 1/ 8 w 1% 0805 smd 11 r6 1 crcw120616r0fkea vishay res 16.0 ohm 1/4w 1% 1206 smd 12 r9 1 crcw12065 10kjnea vishay res 510k ohm 1/4w 5% 1206 smd 13 r7 1 crcw0402787rfked vishay res 787 ohm 1/16w 1% 0402 smd 14 c1, c2 2 vj1812y104kxetw1bc vishay cap multilayer cer (mlcc) C smd / smt 1812 0.1uf 500volts x7r 10% 1 6 c5 2 c3225x7s2a475k t dk cap cer 4.7 uf //4.7 uf 100v 1 210 16 l1 1 lps5015 - 225ml coilcraft inductor 2.2mh 64ma 17 l2 1 13r476c murata inductor radial 47m h 0. 045 a
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 8 of 14 2. 4 evaluation board layouts figure 3: top - view pcb layout figure 4: bottom - vie w pcb layout
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 9 of 14 2. 5 evaluation board snapshot s figure 5: top - view pcb board figure 6 : top - view pcb board in bulb module
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 10 of 14 3. led o utput 3.1 led p/n: cree xm - l t6 led output : ~+48 v (ideal) 3.2 led p/n: cree xpstar103 led output : ~+96v (ideal)
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 11 of 14 4. e valuation b oard t esting s ummary 4.1 testing results (case #1): (case #1 = > test conditions: v in =120v ac ; out=48v/90ma ): (case #1 = > test conditions: v in =120v ac ; out=48v/90ma): board # cree led v rms (v) i rms (ma) p in (w) pfc v led (v) i led ( m a) p out (w) efficiency (%) 1 48v 120.52 34.45 4.032 0.969 41.35 91.14 3.566 88.44 2 48v 120.62 35.32 4.125 0.966 41.4 91.95 3 .625 87.88
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 12 of 14 4.2 testing results (case #2): (case #2 = > test conditions: v in =120v ac ; out=96v/45ma): (case #2 = > test conditions: v in =120v ac ; out=96v/45ma): board # cree led v rms (v) i rms (ma) p in (w) pfc v led (v) i led ( m a) p out (w) efficiency (%) 1 96 120.02 37.03 4.227 0.962 94.43 46.17 3.704 87.63
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 13 of 14 5. c onclusion it is concluded that the new circuit implementation of replacing the inductor (l2) and changing the r sense (r4) fully function as expected. as configured in a high - power 48v led module, the efficiency is about ~88% and pfc is ~0.969. as configured in a high - power 96v led module, the efficiency is about ~87.6% and pfc is ~0.962. main benefits are achieved in the h igh - power led evaluation: 1) high efficiency 2) high pfc (>0.9) 3) no electrolytic capacitor 4) correct average led output current 5) suitable for e27 led light bulbs
al9910 ev 8 1 20v ac nd ref design report october 2011 al9910 - ev 8 (10/27/2011) page 14 of 14 important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents und er the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does diodes incorpo rated convey any license under its patent or trademark rights, nor the rights of others. any cus tomer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all t he companies whose products are represented on diodes incorporated website, harmless aga inst all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthor ized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauth orized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney f ees arising out of, directly or indirectly, any claim of personal injury or death associated wi th such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product nam es and markings noted herein may also be covered by one or more united states, int ernational or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or system s without the express written approval of the chief executive officer of diodes in corporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for u se provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perfor m can be reasonably expected to cause the failure of the l ife support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support d evices or systems, and acknowledge and agree that they are solely res ponsible for all legal, regulatory and safety - related requirements concerning their products and any use of diodes incorporated products in such safety - critical, life support devices or systems, notwithstanding any devices - or systems - related information o r support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diod es incorporated products in such safety - critical, life support dev ices or systems. copyright ? 20 1 1 , diodes incorporated www.diodes.com

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