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al882 0 document number: ds 37369 rev. 1 - 2 1 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product 40v, 2a boost/buck led driver description the al8820 is a highly integrated high performance led driver optimized for mr16/ar111 an d other similar led lamp applications. with a proprietary control scheme, the led driver is compatible with many commonly used electronic transformers and meets high power factor ( pf ) and low total harmonic distortion (thd) requirements for these applicati ons. the device integrates two dc/dc converters . the two stage design offers superior performance for mr16/ ar111 applications. the first stage is a boost pfc stage which improves pf, reduces emi, power s up the buck stage and the compatibility of electroni c transformers. the buck stage regulates the led current thru the setting of external sense resistor . the integrated low r dson of integrated mosfets reduce the conduction power loss. a compact thermally efficient so - 8ep package, the al8820 provides an idea l solution for mr16 /ar111 applications . features ? wide input voltage range: 5v to 36 v ? internal 40v ndmos switch ? 2a output current ? continuous conduction mode (ccm) operation ? up to 1mhz switching frequency ? high pf > 0.9 and l ow thd < 30% and l ow ripple < 20 % ? internal protections ? under voltage lock out (uvlo) ? output open/ short protection ? over temperature protection (otp) ? so - 8ep ? totally lead - f ree & fully r o hs compliant (notes 1 & 2) ? halogen and ant imony free. green device (note 3) pin assignments (top view) so - 8ep applications ? mr16 lamps ? ar111 ? general illumination lamps note s: 1 . no purposely added lead. fully eu directive 2002 /95/ec (rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more information about diodes incorporateds definitions of hal ogen - and antimony - free, "green" and lead - f ree . 3. halogen - and antimony - free "gree n products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. typical applications circuit d 2 d 1 d 3 d 4 d 5 d 6 r s e t 1 r h y s r s e t 2 r 1 r 2 c 1 c 2 c 3 s w 1 c s 1 f b c o m p s w 2 v c c v i n c s 2 ( e x p o s e d p a d ) l 2 l 3 c 4 c 5 v o u t v a c a l 8 8 2 0 l 1 1 2 3 4 8 7 6 5 sw 1 cs 1 fb comp sw 2 vcc vin cs 2 ep
al882 0 document number: ds 37369 rev. 1 - 2 2 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product pin description s pin number pin name function 1 sw1 integrated boost mos drain 2 cs1 boost input current sense pin 3 fb boost output voltage feedback pin 4 c o mp soft - start and boost control loop compensation 5 cs2 buck output current sense pin 6 v in ic i nput v oltage, a dding fr om boost output voltage 7 vcc supply voltage for i nternal circuit 8 sw2 integrated buck mos drain 9 exposed pad connected to g round functional block diagram v i n c s 2 c s 2 u v l o c h i p _ e n v b g t r i m m i n g r e s i s t o r i c s d r i v e r h y s t e r e s i s c o m p a r a t o r v r e f v c s 2 v c c s w 2 g n d e a f b v b g c o m p c s 1 c s 1 v c s 1 s w 1 c o m p a r a t o r o v p v f b o v p o t p o t p b a n d g a p v b g v c c v r e f l o g i c d r i v e r v c c c t l i n t e r n a l r e g u l a t o r v c c v i n i h y s i h y s p w m 1 p w m 1 2 3 6 5 7 8 1 4 9
al882 0 document number: ds 37369 rev. 1 - 2 3 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product absolute maximum ratings (@ t a = + 25c, unless othe rwise specified . note 4 ) parameter symbol value unit v in pin voltage v in - 0.3 to 40 v sw1 pin voltage v sw1 - 0.3 to 40 v sw2 pin voltage v sw2 - 0.3 to 40 v comp pin voltage v comp - 0.3 to 6 v cs1 pin voltage v cs1 - 0.3 to 6 v cs2 pin voltage v cs2 - 0.3 to 40 v fb pin voltage v fb - 0.3 to 6 v vcc pin voltage v cc - 0.3 to 6 v operating junction temperature t j + 1 5 0 oc storage temperature t stg - 65 to + 1 5 0 oc thermal resistance ( junction to ambient ) (n ote 5) ja 66 c/w lead temperature (soldering, 10sec) t lead + 300 oc esd ( machine model) C 200 v esd ( human body model) C 2000 v note s : 4. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. thes e are stress ratings only and functional operation of the device at these or any other condition s beyond those indicated under recommended operating conditions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. 5. device mounted on fr - 4 pcb (51mm x 51mm ) 2oz copper, minimum recommended pad layout on top layer and thermal vias to bottom layer ground plane. for better thermal performance, larger copper pad for heat - sink is needed. recommended operat ing conditions symbol parameter min max unit v in vin pin voltage 5 36 v t a ambient temperature - 40 + 105 c
al882 0 document number: ds 37369 rev. 1 - 2 4 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product electrical characteristics (@ t a = + 25c, unless otherwise specified . ) parameters symbol conditions min typ max unit input supply vin pin voltage v in C 5 C 36 v quiescent current i q no s witching C 1 C ma under - voltage lockout voltage v uvlo v in rising C 4.2 C v uvlo hysteresis v hys C C 500 C mv vcc regulator v cc pin voltage v cc C 4.5 5 5.5 v source current capability C v cc = 5v 10 C C ma load regulation C C C 4 C % integrated nmos_buck mos voltage s tress (note 6) v ds 1 C C 40 C v mos current s tress (note 6) i ds 1 C C 2 C a mos r dson r dson1 C C 2 50 C m ? integrated nmos_boost mos voltage s tress (note 6) v ds 2 C C 40 C v m os current s tress (note 6) i ds 2 C C 2 C a mos r dson r dson2 C C 2 50 C m ? compensation and soft start (comp pin) error amplifier trans - conductance gea C C 1000 C a/v sourcing current i o _ h v comp = 0.5v C 68 C a sinking current i o _ l v comp = 4.5v C 68 C a fb pin voltage v fb C 1.18 1.22 1.26 v fb ovp voltage v ovp C 1.59 1.66 1.75 v fb ovp voltage hysteresis v ovp_hys C 0.15 0.2 0.25 v hysteresis comp e titor (boost) boost sense voltage low level v cs1 _ min v comp = 0v C - 90 C mv hys teresis c urrent i hys C 85 100 115 a hysteresis comp e titor (buck) b uck s ense voltage high l evel v csh C C 115 C m v b uck s ense voltage low l e vel v csl C C 85 C m v buck sense voltage average level v cs2_ave C 95 100 10 5 mv over - temperature protection thermal shutdown (note 6) t otsd C + 140 + 16 0 C oc thermal shutdown hysteresis (note 6) t hys C C +40 C oc note 6 : these parameters, although gu aranteed by design, are not 100% tested in production.
al882 0 document number: ds 37369 rev. 1 - 2 5 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product performance characteristics quiescent current vs. vin pin voltage quiescent current vs. ambient temperature v cc pin voltage vs. vin pin voltage v cc pin voltage vs. ambient temperature fb pin voltage vs. vin pin v oltage fb pin voltage vs. ambient temperature -45 -30 -15 0 15 30 45 60 75 90 105 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 quiescent current (ma) ambient temperature ( o c) v in = 12v 4 8 12 16 20 24 28 32 36 4.8 4.9 5.0 5.1 5.2 5.3 5.4 vcc pin voltage (v) vin pin voltage (v) 4 8 12 16 20 24 28 32 36 1.19 1.20 1.21 1.22 1.23 1.24 fb pin voltage (v) vin pin voltage (v) -45 -30 -15 0 15 30 45 60 75 90 105 4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5 vcc pin voltage (v) ambient temperature ( o c) v in = 12v 4 8 12 16 20 24 28 32 36 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 quiescent current (ma) vin pin voltage (v) -45 -30 -15 0 15 30 45 60 75 90 105 1.19 1.20 1.21 1.22 1.23 1.24 fb pin voltage (v) ambient temperature ( o c) v in = 12v
al882 0 document number: ds 37369 rev. 1 - 2 6 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product performance characteristics (cont.) boost sense voltage low level vs. boost sense voltage low level vs. vin pin voltage ambient temperature hys teresis c urrent vs. vin pin voltage hys teresis c urrent vs. ambient temperature buck sense voltage average level vs. buck sense v oltage average level vs. vin pin voltage ambient temperature 4 8 12 16 20 24 28 32 36 98 99 100 101 102 103 104 buck sense voltage average level (mv) vin pin voltage (v) 4 8 12 16 20 24 28 32 36 -92 -90 -88 -86 -84 -82 -80 boost sense voltage low level (mv) vin pin voltage (v) 4 8 12 16 20 24 28 32 36 98 100 102 104 106 108 110 112 114 hysteresis current ( ? a) vin pin voltage (v) -45 -30 -15 0 15 30 45 60 75 90 105 98 100 102 104 106 108 110 112 114 hysteresis current ( ? a) ambient temperature ( o c) v in = 12v -45 -30 -15 0 15 30 45 60 75 90 105 -92 -90 -88 -86 -84 -82 -80 boost sense voltage low level (mv) ambient temperature ( o c) v in = 12v -45 -30 -15 0 15 30 45 60 75 90 105 98 99 100 101 102 103 104 buck sense voltage average level (mv) ambient temperature ( o c) v in = 12v
al882 0 document number: ds 37369 rev. 1 - 2 7 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product application information al8820 operation the device integrates two dc/dc regulators. t his two stage design offers superior performance for mr16/ ar111 applications. the first stage is a boost pfc stage which improves pf, reduces emi and conditions the input to be compatible with many of the most commonly used electronic tr ansformers (et). this input stage also provides power for the second stage buck converter which provides regulated constant output current for the leds. figure 1 . typical application circuit v in voltage setting v in voltage is the output voltage of boost section a nd is also the input voltage of the buck section. therefore v in must be set sufficiently higher than the output voltage of buck section. for the boost application , the output voltage can be defined as: r set1 and r hys setting the boost converter of the al8820 operates at c ontinuous c onduction mode and is base d on hy ster esis schematic which has lower threshold and upper threshold. refer to figure 2 depictin g the inductor current waveform . figure 2 . inductor current when switch sw1 is turned on, the inductor current flow s through r set1 a nd ra mps up linearly. the rising current produces a voltage ramp across r set1 . when the voltage across r set1 reaches the upper threshold, switch sw1 is turned off. the inductor current continues to flow through r set1 but decays. the decaying current produc es a falling voltage at r set1 . when the voltage across r set1 fall s to the lower threshold, switch sw1 is turned on again. t he lower threshold voltage v lt depends on the voltage v comp at comp pin that varies with the input voltage and output load. t he equa tion is shown as below. d 2 d 1 d 3 d 4 d 5 d 6 r s e t 1 r h y s r s e t 2 r 1 r 2 c 1 c 2 c 3 s w 1 c s 1 f b c o m p s w 2 v c c v i n c s 2 ( e x p o s e d p a d ) l 2 l 3 c 4 c 5 v l e d v a c a l 8 8 2 0 l 1 2 2 1 22 . 1 r r r v v in ? ? ? i l i l ( a v e ) i l ( v a l ) t i m e i l t o n t o f f p e a k o r u p p e r t h r e s h o l d v a l l e y o r l o w e r t h r e s h o l d i l ( p e a k )
al882 0 document number: ds 37369 rev. 1 - 2 8 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product application information (cont.) the range of v comp is from 0v to 5v. t he upper threshold depends on the lower threshold and the hysteresis value. the hysteresis value is set by external resister r hy s . it is defined as below. according to the operation principle , the peak to peak current ? i l and the valley current i l(val) can be obtained by the below equations. where : ? i l is the peak to peak current of inductor . i l(val) is the valley current of inductor. from the f igure 2, the relationship between i l ( peak) , i l(val) , i l(ave) and ? i l can be obtained as below. where: i l (peak) is the peak current of inductor . i l(ave) is the average current of ind uctor. as we know the average current i l(ave) depends on the output power, rated input voltage v in1 of boost converter and total efficiency . so the average current i l(ave) can be obtained by the below equation. w here : ( 1.5) 0.6 1.4 ,1.5 5 16 88 , 0 1.5 comp comp lt comp v mv v v v v mv v v v ? ? ? ? ?? ? ? ? ? ?? ? l val l ave l i i i ? ? ? ? 2 1 ) ( ) ( 1 ) ( set lt val l r v i ? 100 hys hys v r a ? ?? 1 ) ( in led led ave l v i v i ? ? ? ? 1 set hys l r v i ? ? l val l peak l i i i ? ? ? ) ( ) (
al882 0 document number: ds 37369 rev. 1 - 2 9 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product applica tion information (cont.) v led is the output voltage of buck converter . i led is the output current of buck converter . set ratio of ? i l to i l ( peak) as k. r set1 and r hys can be obtained from above equations: w hen the value of k , and v comp are provided , the value of resister r set1 and r hys can be calculated according to these above equations. in order to get appropriate efficiency and electronic transformer (et) c ompatibility , generally k is set between 0.4 and 0.8. due to t he range of v comp is from 0v to 5v , in order to get output voltage regulation, generally v comp is set as 3v at rated input voltage. step - up converter inductor selection because of the using of the hysteretic control scheme, the switching frequency in a boost configuration can be adjusted in accordance to the value of the inductor being us ed . the value of the inductor can be determined by using the following equation: w here: l 2 is the coil inductance . r l is the coil resistance . r set1 is the current sense resistance . r dson 1 is the switch sw1 resistance . v in 1 is the rated input voltage of the b oost converter. v in is the output voltage of boost converter. v f is the diode forward voltage at the required load current . f sw1 is the desired switching frequency . 4 1 1 2 10 = (2 ) led led set hys in v i k r r vk ? ? ? ? ? ? ? ? ? ) ( peak l l i i k ? ? 3 1 1 3 1 (( 1.5) 0.6 1.4) (2 ) 10 1.5 5 32 - = 44 (2 ) 10 , 0 1.5 comp in comp led led set in comp led led v k v v v v v i k r kv v v v v i k ? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ?? ? ?? ? 1 1- 1 ) ( 1 1 ) ( 1 1 ) ( 1 1 1 ] ) 2 2 ( [ ] ) ( [ ] ) ( [ 2 sw ave l dson l set f in l ave l set l f in in ave l dson l set in f i r r r v v i i r r v v v i r r r v l ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
al882 0 document number: ds 37369 rev. 1 - 2 10 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product application info rmation (cont.) l ow switching frequency can decrease the switching loss but need to choose higher inductor values that will result in larger size in order to meet the saturation current. for example , the relation ship between switching frequency and induct or value is shown as below t able 1 in the same application system. considering these factors, 5 00khz switching frequency is recommend ed in typical application. inductance value of l2 @ vac = 12vac, v in = 22v , v out = 10v, i out = 650ma operation frequency o f sw1 a t peak voltage o f vac 10 h 637khz 15 h 500khz 27 h 373khz table 1 led current control the led current is controlled by the resistor r set2 in f igure 1. connected between v in pin and cs2 pin, the nominal average output current in the le d(s) is defined as: buck converter inductor selection the inductance l3 in buck converter is determined by the following factors: inductor ripple current, switching frequency, v led /v in ratio, internal fet, and component paramet er. the inductance l3 is calculated according to the following equation: where: v in is the output voltage of boost converter. v led is the output voltage of buck converter . r set2 is the current sense resistance . r dson 2 is the s witch resistance (=0.25 ? ) . r coil is the coil resistance of inductor l3. ? i led is the coil peak - peak ripple current, internally set to 0.25 x i led. f sw 2 i s the switching frequency. t he low switching frequency f sw 2 is recommended in order to minimize errors due to switching delays which will result in increased ripple and lower efficiency. higher switching frequency can choose smaller inductor value that has smaller size in order to meet the saturation current but will increase the switching loss. for example , the relation s hip between switching frequency and inductor value is shown as below t able 2 in the same application system. considering these factors, about 300 khz switching frequency is recommend ed in typical application. 2 2 2 1 ) ( 3 sw in led led led coil dson set led in f v v i i r r r v v l ? ? ? ? ? ? ? ? ? 2 100 led set mv i r ?
al882 0 document number: ds 37369 rev. 1 - 2 11 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product application information (cont.) inductanc e value o f l3 @ v in = 22vac, v out = 10v , i out = 650ma operation frequency o f sw2 33 h 756khz 47 h 568khz 68 h 397khz 100 h 257khz table 2 v in ovp protection the al8820 has two kinds of over - voltage ( ovp ) protection both of which turn off t he power switch sw1. w hen the voltage at the fb pin exceeds threshold approximately 1.66v, the power switch of step - up stage is turned off. the power switch of boost section can be turned on again once the voltage at the fb pin drops below 1.46v. the al8 820 additionally has an internal over voltage protection to protect the al8820 from excessive input voltage. when the voltage applied at v in pin exceeds 39v, it will turn off the power switch sw1 . t he power switch will turn on once the voltage at v in drops below 3 4v . v cc regulator the v cc pin requires a capacitor for stable operation and to store the charge for the large gate switching currents. choose a 10v rat ed low esr, x7r or x5r, ceramic capacitor for best performance. a 4.7 f capacitor will be adequ ate for many applications. place the capacitor close to the ic to minimize the trace length between the v cc pin and the exposed pad . an internal current limit on the v cc out put protects against excessive on - chip power dissipation. the v cc pin h as set the output to 5v (typ.) to protect the internal fets from excessive power dissipation caused by not being fully enhanced. if the v cc pin is used to drive extra circuits beside the al8820, the extra loads s hould be limited to less than 8 ma. output c apacitor c1 and c2 of boost the capacitor c1 is used to hold the bu s voltage when the electronic transformer has no output. for most applications, it is recommended to use an aluminum electrolytic capacitor with greater than 220 f capacitance. the output capacitor c2 is selected to handle the output ripple noise requirements. for the best performance, it is recommended to use x7r or better grade ceramic capacitor greater than 1 f capacitance. compensation c apacitor c4 in applications powered by electron ic transformer, the input voltage can change roughly in one cycle of ac power frequency. a 1 f ceramic capacitor c4 connected from comp pin to ground help to stabilize the control loop of the boost regulator. output c apacitor c5 of buck higher led current ripple will shorten the led life time and increase heat accumulation of led. to reduce the led current ripple, an output capacitor in parallel with the led should be added. l ower ripple can be achieved with higher capacitor values. for most application s , a value of 4.7 f is recommend ed . diode s election for maximum efficiency and performance, the rectifier s (d5 , d6) should be fast low capacitance schottky diodes wi th low reverse leakage at maximum operating voltage and temperature. with its low power diss ipation, the schottky diode outperforms other silicon diodes and increases overall efficiency. over temperature protection a over temperature protection feature is to pro tect the al8820 from excessive internal temperature . when the junction temperature ex ceeds + 160 oc , the internal fets will be turn ed off. when junction temperature drops below + 1 2 0 oc , ic will turn on both fets and return to normal operation.
al882 0 document number: ds 37369 rev. 1 - 2 12 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product ordering information part number package c ode package 13 tape an d reel quantity part number suffix al8820sp - 13 sp so - 8ep 2500/tape & reel - 13 marking informatio n a l 8 8 2 0 x x - x x p a c k i n g p a c k a g e 1 3 : 1 3 " t a p e & r e e l s p : s o - 8 e p a l 8 8 2 0 ( t o p v i e w ) y y w w x x e l o g o w w : w e e k : 0 1 ~ 5 2 ; 5 2 y y : y e a r : 0 8 , 0 9 , 1 0 ~ x x : i n t e r n a l c o d e 8 7 6 5 1 2 3 4 r e p r e s e n t s 5 2 a n d 5 3 w e e k e : s o - 8 e p p a r t n u m b e r
al882 0 document number: ds 37369 rev. 1 - 2 13 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product package outline dimensions (all d imensions in mm (inch) . ) (1) package type: so - 8ep 8 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 1 . 2 7 0 ( 0 . 0 5 0 ) 0 . 4 0 0 ( 0 . 0 1 6 ) 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 0 . 0 5 0 ( 0 . 0 0 2 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 0 0 . 2 5 0 ( 0 . 0 1 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 5 5 0 ( 0 . 0 6 1 ) 2 . 1 1 0 ( 0 . 0 8 3 ) 2 . 7 1 0 ( 0 . 1 0 7 ) 2 . 7 5 0 ( 0 . 1 0 8 ) 3 . 4 0 2 ( 0 . 1 3 4 ) 5 . 1 0 0 ( 0 . 2 0 1 ) n o t e : e j e c t h o l e , o r i e n t e d h o l e a n d m o l d m a r k i s o p t i o n a l . 0 . 3 0 0 ( 0 . 0 1 2 )
al882 0 document number: ds 37369 rev. 1 - 2 14 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product suggested pad layout (1) package type: so - 8ep dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) x1 (mm)/(inch) y1 (mm)/(inch) e (mm)/(inch) value 6 .900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 3.600/0.142 2.700/0.106 1.270/0.050 g e x x 1 y y 1 z
al882 0 document number: ds 37369 rev. 1 - 2 15 of 15 www.diodes.com december 2014 ? diodes incorporated al8820 new product important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, t he implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corre ctions or other changes without further notice to this document and any product described herein. diodes incorporated does not assume any liability a rising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products described herein in such appli cations shall assume all risks of such use and will agree to hold diodes incorp orated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthor ized s ales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and a ttorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of this document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use a s critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to im plant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided i n the labeling can be reasonably expected to result in significant injury to the user. b. a criti cal component is any component in a life support device or system whose failure to perform can be reasonably expected to caus e the failure of the life 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 devices or systems, and acknowledge and agree that they are solely responsible 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 or support that may be provided by diodes incorporated. further, customers must fully indemnify diode s incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety - critical, life support devices or systems. copyright ? 2014, diodes incorporated www.diodes.com

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