 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| APS39903 document numbe r : ds37226 rev. 2 - 2 1 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product p ump e xpress tm c ompatible ac/dc psr switcher description the APS39903 is a high accuracy and low cost switching mode power supply switch er for battery c harger/adapter applications. it is consists of a primary side regulation controller and a high voltage transistor. the controller regulates the output voltage and current in the primary side by piece - wise pulse frequ ency modulation ( p - pfm) in discontinuous conduction mode (dcm) . the switcher use s adaptive source current t o optimize driving current to reduce driving loss. the system operating frequency reduces linearly from heavy load to light load in each interval of the p - pfm, and enters constant current mode when the load current is equal to the maximum system output current. the output voltage and output current limit of APS39903 can be adjusted based on the patterns of load current aligned to mtk pump express proto col . the APS39903 provides operating frequency jitter function from light to full load range to improve the power supply em i performance. the APS39903 also has built - in fixed cable voltage drop compensation ( 6 % of nominal system output voltage) a nd adjustable line voltage compensation. the APS39903 can work individually to achieve ultra - low standby power under 5v output. the APS39903 is packaged in so - 7 . applications ? adapters /chargers pin assignments (top view) so - 7 features ? compatible to mediatek pump express tm p rotocol ? ultra - low standby power consumption ? built - in npn transistor with 700v cbo ? vall e y - turn o n to r educe s witching l oss and benefit for emi ? piece - wise frequency reduction to enhance conversion efficiency and suppress audio noise ? 5% constant voltage accuracy for 5v o utput ? audio n oise s uppression ? open circuit protection (ockp) ? current sense resistor short protection ? over v oltage p rotection (ovp) ? over temperature p rotection (otp) ? short c ircuit p rotection (scp) with hiccup ? totally lead - free & fully rohs compliant (notes 1 & 2 ) ? halogen and antimony free. green device (note 3) 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 "green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds . 1 2 3 4 7 6 5 f b v c c g n d c c c s c p c
APS39903 document numbe r : ds37226 rev. 2 - 2 2 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product typical applications circuit pin description s p in number pin name function 1 cpc a capacitor is connected to this pin to form a low pass filter for cable voltage drop compensation , audio noise suppression and detecting the patterns of load current to change the output voltage and current 2 fb the cv and cc regulation are realized base on the voltage sampling of this pin 3 vcc vcc supply pin for the switcher . a capacitor with low esr should be placed as close as possible to this pin 4 cs current senses pin of ic. the cs pin will turn off the power transistor when the cs pin voltage reaches turn off threshold. 5 , 6 c this pin is connected with an internal power bjt s collector 7 gnd the ground of the switcher + c 1 f r 1 + c 2 l 1 t r 1 d 1 + f b r 1 3 c v c c r 2 r 1 4 a p s 3 9 9 0 3 c p c g n d c 6 r 3 r 4 5 v / 1 a c 3 d 4 ~ d 7 l 2 r 1 2 c 7 d 2 + c 4 d 3 c 5 r 1 1 c s r 1 r 1 0 7 1 4 2 5 , 6 3 APS39903 document numbe r : ds37226 rev. 2 - 2 3 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product functional block diagram absolute maximum ratings (note 4 ) symbol parameter rating unit v cc supply voltage - 0.3 to 35 v v c s , v c pc voltage on cs, cpc pin - 0.3 to 7 v v fb fb input voltage - 0. 3 to 8 v v cbo collector - emitter voltage 700 v C collector dc current 1.5 a p d total power dissipation 0.7 w t j operating junction temperature - 40 to + 150 c t stg storage temperature - 65 to +150 c t lead lead temperature (soldering, 10 sec) +300 c ja thermal resistance ( junction to ambient ) 100 c /w esd esd (human body model) 4000 v esd ( machine model ) 300 v note 4 : stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are stres s ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommende d operating conditions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. r e g u l a t o r & b i a s o v p o c k p o t p u v l o v a l l y - o n a n d d r i v e r f b c s v c c c g n d c o n s t a n t v o l t a g e c o n t r o l c a b l e c o m p e n s a t i o n 4 3 5 , 6 7 1 2 c o n s t a n t c u r r e n t c o n t r o l f r e q u e n c y j i t t e r p r o l i n e c o m p e n s a t i o n t o n s t o n s d e t e c t i o n v l o a d r c s s h o r t s c p t o n s l o a d d e t e c t i o n c p c v l o a d o u t p u t v o l t a g e s e l e c t i o n 5 v ~ 3 . 6 v _ s e l e c t 5 v ~ 3 . 6 v _ s e l e c t 5 v ~ 3 . 6 v _ s e l e c t t o n s c s q 1 APS39903 document numbe r : ds37226 rev. 2 - 2 4 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product electrical characteristics (@ v cc = 1 2 v, t a = + 25c , unless othe rwise specified .) symbol parameters conditions min typ max unit startup and uvlo s ection v th_st startup threshold C 13 15.5 18 v v o pr(min) minimal operating voltage C 5.2 5.8 6.4 v standby current section i st startup current v cc = v th_st - 1 v before startup 0 0.2 0.6 a i cc _qst quiescent current static current 435 500 5 65 driving output section i out(m ax ) the maximum source current C 25 32 39 m a power transistor section v ce(sat) collector - emitter saturation voltage i c =0.5a C C 0.3 v h fe dc current gain C 14 17 C C i ceo leakage current C C C 60 na operating frequency section (5% load to full load) t off(max) maximum off time C 691 768 845 s t sample sampling t ime 37% to 100% full load 5.4 6 6.6 s 4 % to 37% full load 3.2 3.6 4.0 s 0 % to 4 % full load ( note 5 ) 2.25 2.5 2.75 s frequency jitter v cs /v cs v cs modulation 7% to 100% full load 2 3 4 % t mod v cs modulation period C 230 256 282 s current sense section v cs_h (vo4.4v) current sense threshold 37% to 100% full load 830 900 970 mv v cs_h (vo<4.4v) 940 1020 1100 v cs_ m 4% to 37% full load 550 600 650 v cs_ l 0% to 4% full load (note 5) 320 350 380 r l ine built - in line compensation r esistor C 260 330 400 ? t leb leading edge blanking v cs_h and v cs_ m 425 500 575 ns v cs_ l (note 5) 170 200 230 constant voltage section v fb @5v feedback threshold voltage C 3.94 4.0 4.06 v APS39903 document numbe r : ds37226 rev. 2 - 2 5 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product electrical characteristics (@ v cc = 12 v, t a = + 25c , unless othe rwise specified .) (cont.) symbol parameters conditions min typ max unit v fb @4.8v feedback threshold voltage C 3.75 3.85 3.95 v v fb @4.6v 3.61 3.7 3.79 v fb @4.4v 3.47 3.56 3.65 v fb @4.2v 3.32 3.41 3.5 v fb @4v 3.18 3.26 3.34 v fb @3.8v 3.03 3.11 3.19 v fb @3.6v 2.89 2.96 3.03 r fb fb pin input resistance v fb =4v 560 700 840 k? c ab l e /v out % cable compensation rat io @5v C constant current section t ons /t sw @5v &4.2v maximum secondary duty cycle v fb = 2 v (note 5) 0.47 0.5 0.53 C ons /t sw @ 4.8v&4v 0.49 0.52 0.55 t ons /t sw @ 4.6v&3.8v 0.51 0.54 0.57 t ons /t sw @ 4.4v&3.6v 0.53 0.56 0.59 dynamic section v uv_h under voltage of feedback pin for v cs_ h (note 5) 3.61 3.68 3.75 v output voltage selection section v cpc_l current control threshold v cpc control_l C C cpc_h v cpc control_h C C on_a current control pattern time (note 5) 400 500 600 ms t on_b 220 300 380 t on_c 50 100 150 t off_d 50 100 150 t wdt watch dog time C protection function section v fb(ovp) over voltage protection C cc(ovp) over voltage protection at vcc pin C fb(scp) short circuit protection v fb @ hiccup 1.61 1.7 1.79 v t scp maximum time under v fb(scp) C otp shutdown temperature C c t hys temperature hysteresis C c note 5 : g uarantee d by design . APS39903 document numbe r : ds37226 rev. 2 - 2 6 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product o peration principle description figure 1 . 5 w b attery c harger figure 1 is the typical application circuit of APS39903, which is a conventional flyback converter with a 3 - winding transformer -- - primary winding (n p ), secondary winding (n s ) and auxiliary winding (n aux ). the auxiliary winding is used for providing vcc sup ply voltage for ic and sensing the output voltage feedback signal to fb pin . figure 2 shows the typical waveforms which demonstrate the basic operating principle of APS39903 application. and the parameters are defined as following. i p --- the primary side current i s --- the secondary side current i pk --- peak value of primary side current i pks --- peak value of secondary side current v sec --- the transient voltage at secondary winding v s --- the stable voltage at secondary winding when rectification diode is in conducting status, which equals the sum of output voltage v out and the forward voltage drop of diode v aux --- the transient voltage at auxiliary winding v a --- the stable voltage at auxiliary winding when rectification diode is in conducting status, which equ als the sum of voltage vcc and the forward voltage drop of auxiliary diode t sw --- the period of switching frequency t onp --- the conduction time when primary side switch is on t ons --- the conduction time when secondary side diode is on t off --- the dea d time when neither primary side switch nor secondary side diode is on t offs --- the time when secondary side diode is off + c 1 f r 1 + c 2 l 1 t r 1 d 1 + f b r 1 3 c v c c r 2 r 1 4 a p s 3 9 9 0 3 c p c g n d c 6 r 3 r 4 5 v / 1 a c 3 d 4 ~ d 7 l 2 r 1 2 c 7 d 2 + c 4 d 3 c 5 r 1 1 c s r 1 r 1 0 7 1 4 2 5 , 6 3 APS39903 document numbe r : ds37226 rev. 2 - 2 7 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product o peration principle description (cont.) figure 2 . the operation waveform of flyback psr system for primary - side regulation, the primary current ip(t) is sensed by a current sense resistor r cs ( r2 as shown in figure 1) . the current rises up linearly at a rate of: ( 1 ) as illustrated in figure 2 , when the current ip(t) rises up to i pk , the switch q1 turns off. the constant peak current is given by: ( 2 ) the energy stored in the magnetizing inductance l m each cycle is therefore: ( 3 ) so the power transferring from the input to the output is given by: ( 4 ) where, the f sw is the switching frequency. when the peak current i pk is constant, the output power depends on the switching frequency f sw . constant voltage operation as to constant - voltage (cv) operation mode, the APS39903 detects the auxiliary winding voltage at fb pin t o regulate the output voltage. the auxiliary winding voltage is coupled with secondary side winding voltage, so the auxiliary winding v oltage at d1 conduction time is : ( 5 ) where the vd is the diode forward voltage drop. t onp t ons i pk i pks v s i p i s t offs t off v sec v a v aux t sw sw pk m f i l p ? ? ? ? 2 2 1 m l t dt t dip ) ( v ) ( in ? cs cs pk r v i ? ? ? vd vo n n v s aux aux ? ? ? 2 2 1 pk m i l eg ? ? ? APS39903 document numbe r : ds37226 rev. 2 - 2 8 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product o peration principle description (cont.) figure 3 . auxiliary voltage waveform the voltage detection point is at a constant delay time of the d1 on - time. the constant delay time is changed with the different primary peak current. the cv loop control function of APS39903 then generates a d1 off - time to regulate the output voltage. constant current operation the APS39903 can work in constant - current (cc) mode. figure 2 shows the secondary current waveforms. in cc operation mode, the cc control loop of APS39903 will keep a fixed proportion between d1 on - time t ons and d1 off - time t offs . the fixed proportion is ( 6 ) the relationship between the output current and secondary peak current i pks is given by: ( 7 ) as to tight coupled primary and secondary winding, the secondary peak current is ( 8 ) thus the output constant - current is given by: ( 9 ) therefore, APS39903 can realize cc mode operation by constant primary peak current and fixed diode conduction duty cycle. multiple segment constant peak current as to the original pfm psr system, the switching frequency decreases with output current decreasing, which will encounter aud ible noise issue since switching frequency decrease s to audio freq uency range, about less than 20 k hz. in o rder to avoid audible noise issue, APS39903 uses 3 - segment constant primary peak current control method. at constant voltage mode, the current sense threshold voltage is multiple segment with different loadin g, as shown in figure 4 , which are v cs _h for high load, v cs _ m for medium load and v cs _ l for light load. at constant current mode, the peak current is still v cs _h . pk s p pks i n n i ? ? 4 4 ? offs ons t t pk s p offs ons ons pk s p out i n n t t t i n n i ? ? ? ? ? ? ? ? 8 2 2 1 0 v s e e e q u a t i o n 5 t o n s t s a m p l e offs ons ons pks out t t t i i ? ? ? ? 2 1 APS39903 document numbe r : ds37226 rev. 2 - 2 9 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product o peration principle description (cont.) figure 4 . multiple segment peak current at cv mode it can be seen from figure 4 , with multiple segment peak current control, APS39903 power system can get the good audible noise performance. leading edge blanking (leb) time when the power switch is turned on, a turn - on spike will occur on the sense - res istor. to avoid false turn off switch, a 500ns leading - edge blanking is built in. during this blanking time, the current sense comparator is disabled and the external power switch cannot be turned off. furthermore, because of multiple segment peak current design, the required maximum on time t onp changes with different load condition. therefore the leb time parameter also changes with different load condition. adjustable line compensation and fixed cable compensation the APS39903 power system can adjust line compensation by changing the upper resistor at fb pin. t he line compensation capability is increased by decreasing the resistance of the upper fb resistor . cable compensation is fixed in APS39903 . valley turn - on when the off time (t off ) is lower than 32 ? s, APS39903 power system can work with valley turn on. it can reduce bjt switching on power losses which is result from the equivalent output capacitance. at the same time, because of valley turn on the switching frequency has the random jitter feature, which will be benefit for conductive emi performance. and valley turn on can also reduce the power switch turn on sp ike current and then result in the better radiative emi performance. frequency jitter even thoug h the valley turn on function can lead the random frequency jitter feature, an active frequency jitter function is added to APS39903 to ensure the frequency jitter performance in the whole loading condition. by adjusting the v cs _ ref with deviation of 3.0% in a random pulse sequence , the active frequency jitter can be realize d with 256 s repetitive cycles. i o m a x v c s _ l v c s _ m v c s _ h l i g h t l o a d m e d i u m l o a d h i g h l o a d v c s _ r e f i o m a x f s w 2 2 k h z 2 k h z 6 0 k h z 3 7 % 4 % 1 0 0 % 1 2 k h z 4 k h z APS39903 document numbe r : ds37226 rev. 2 - 2 10 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product o peration principle description (cont.) o utput v oltage s election s ection the output voltage and output current of APS39903 can be adjusted based on the patterns of load current aligned to mtk pump express protocol . the voltage of cpc pin of APS39903 is changed with the load current. APS39903 can detect the load current patterns through cpc pin. the pattern of decrease output voltage is shown in figure 5 and the pattern of increase output voltage is shown in fig ure 6. figure 5 . the p attern of d ecrease o utput v oltage fig ure 6 . the p attern of i ncrease o utput v oltage just shown as figure 7, the voltage is changed step by step among 4.8v and 3.6v. when the APS39903 detects one full pattern of decrease output voltage, the output voltage will decrease 0.2v from the current voltage level. when the output voltage is 3.6v, the pattern of decrease output voltage is invalid. when the APS39903 detects one full pattern of increase output voltage, the output voltage will increase 0.2v from the current voltage level. when the output voltage is 5v, the pattern of decrease output voltage is invalid. at any voltage level among 4.8v to 3.6v, once the wdt function (v cpc APS39903 document numbe r : ds37226 rev. 2 - 2 12 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product o peration principle description (cont.) figure 9 . short circuit protection (scp) and hiccup mode otp if the junction temperature reaches the threshold of + 140 ? c, APS39903 shuts down immediately. before vcc voltage decrease s to uvlo, if the junction temperature decreases to + 100 ? c, APS39903 can recover to normal operation. if not, the power system enters restart hiccup mode until the junction temperature decreases below + 100 ? c. performance characteristics figure 10 . startup voltage vs. ambient temperature figure 11 . startup current vs. ambient temperature -40 -20 0 20 40 60 80 100 120 140 13.0 13.5 14.0 14.5 15.0 15.5 16.0 16.5 17.0 ambient temperature ( o c) startup voltage (v) v t h _ s t v o p r ( m i n ) v f b ( s c p ) t s c p v c c v f b v o u t 0 v -40 -20 0 20 40 60 80 100 120 140 0.0 0.5 1.0 1.5 2.0 2.5 startup current ( ? a) ambient temperature ( o c) APS39903 document numbe r : ds37226 rev. 2 - 2 13 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product performance characteristics (cont.) figure 12 . minim um operating voltage vs. ambient temperature figure 1 3 . operating current vs. ambient temperature figure 1 4 . feedback voltage vs. ambient temperature figure 1 5 . sample time vs. ambient temperature figure 1 6 . source current vs. ambient temperature figure 1 7 . current sense voltage vs. ambient temperature -40 -20 0 20 40 60 80 100 120 140 400 450 500 550 600 650 700 ambient temperature ( o c) operating current ( ? a) -40 -20 0 20 40 60 80 100 120 140 4 5 6 7 8 9 sample time ( ? s) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 140 200 300 400 500 600 700 800 900 current sense voltage (mv) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 140 3.4 3.6 3.8 4.0 4.2 4.4 feedback voltage (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 140 3 4 5 6 7 8 ambient temperature ( o c) minimum operating voltage (v) -40 -20 0 20 40 60 80 100 120 140 16 18 20 22 24 26 28 30 ambient temperature ( o c) source current (ma) APS39903 document numbe r : ds37226 rev. 2 - 2 14 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product performance characteristics (cont.) figure 1 8 . line compensation resistance vs. ambient temperature figure 1 9 . input resistance of fb pin vs. ambient temperature ordering information package temperature range cable compensation voltage part number marking id packing so - 7 - 40 to + 150 ? c 6 % APS39903 mtr - g1 39903 m - g1 4000/ tape & reel marking information (top view) : logo xxx xxm - g1 : marking id third l ine: date code y: y ear ww: w ork w eek of m olding a: a ssembly h ouse c ode xx: 7th and 8th d i g its of batch no. a p s 3 9 9 0 3 x x x - g 1 p a c k i n g p a c k a g e t r : t a p e & r e e l m : s o - 7 g 1 : g r e e n p r o d u c t n a m e r o h s / g r e e n -40 -20 0 20 40 60 80 100 120 140 100 150 200 250 300 350 ambient temperature ( o c) line compensation resistance ( ? ) -40 -20 0 20 40 60 80 100 120 140 200 300 400 500 600 700 800 900 1000 ambient temperature ( o c) input resistance of fb pin (k ? ) APS39903 document numbe r : ds37226 rev. 2 - 2 15 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product package outline dimensions (all d imensions in mm (inch) . ) (1) package t ype: so - 7 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 4 . 7 0 0 ( 0 . 1 8 5 ) 5 . 1 0 0 ( 0 . 2 0 1 ) 0 . 3 3 0 ( 0 . 0 1 3 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 0 . 1 5 0 ( 0 . 0 0 6 ) 0 . 2 5 0 ( 0 . 0 1 0 ) 0 . 0 8 0 ( 0 . 0 0 3 ) 0 . 2 5 0 ( 0 . 0 1 0 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 7 5 0 ( 0 . 0 6 9 ) 0 . 4 5 0 ( 0 . 0 1 7 ) 0 . 8 0 0 ( 0 . 0 3 1 ) 8 0 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 2 . 5 4 ( 0 . 1 0 0 ) t y p 1 . 2 5 0 ( 0 . 0 4 9 ) 1 . 5 0 0 ( 0 . 0 5 9 ) 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 . o p t i o n 2 4 5 0 . 3 5 0 ( 0 . 0 1 4 ) t y p o p t i o n 1 APS39903 document numbe r : ds37226 rev. 2 - 2 16 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated new product suggested pad layout (1) package type: so - 7 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e (mm)/(inch) e1 (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 1.270/0.050 2.540/0.100 z g e 1 e x y APS39903 document numbe r : ds37226 rev. 2 - 2 17 of 17 www.diodes.com october 2014 ? diodes incorporated APS39903 a product line of diodes incorporated 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, the 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, corrections or other c hanges 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 incorporated convey any license unde r its patent or trademark rights, nor the rights of others. any customer 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 the companies whose products are represented on diod es incorporated website, harmless against all damages. diodes incorporated do es not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemni fy and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising ou t of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized applicat ion. 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, international or foreign trademarks. this doc ument is written in english but may be translated into multiple languages for reference. only the english version of this do cument is the final and determinative format released by diodes incorporated. life support diodes incorporated products are speci fically not authorized for use as 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 system s 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 use provided i n 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 perform can be reasonably expe cted to cause the failure of the life support device or to affect its safety or effectiveness. custom ers 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 c oncerning 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, cus tomers must fully indemnify diodes 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 ? 201 4 , diodes incorporated www.diodes. com |
Price & Availability of APS39903
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |