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al1663/AL1663R document number: ds 38466 rev. 1 - 2 1 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r universal flyback and buck - boost single stage dimmable led controller description the al1663/AL1663R is a high performance single stage flyback and buck - boost controller, targeting dimmable led lighting application. it is a p rimary side regulation (psr) controller which can provide accurate constant current (cc) regulation without opto - coupler and secondary control circuitry. it is operating at bcm mode which results in good emi and efficiency, and keeps high pf and low total harmonic distortion (thd) under universal input voltage. the al1663/AL1663R can support multiple dimming modes. when a 0.3 to 2.4v dc signal is applied on apwm pin, the device will operate in analog dimming mode. when a digital signal is applied on apwm pin, the device works at pwm dimming mode. a nd for al1663 when a digital signal is applied on pwm d pin and the apwm pin is connected with a hundreds of nf capacitor, the device will work in pwm - to - d c dimming mode . the al1663/AL1663R features low start - up current and low operation current. it integrates multiple protections including over voltage, short circuit, over current and over temperature protection. the al1663/AL1663R is available in so - 8 package. features ? primary side regulation without opto - coup ler ? valley switching for low switching loss ? low start - up current ? high pf and low thd ? high efficiency ? tight led current variation range ? tight output open voltage variation range ? support both pwm dimming and analog dimming ? internal protections ? under volta ge lock out (uvlo) ? output over voltage protection (ovp) ? output short protection (osp) ? over current protection (ocp) ? thermal fold - back protection (tfp) ? over temperature protection (otp) ? low system cost ? package: so - 8 ? totally lead - free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. green device (note 3 ) pin assignments (top view) al1663 AL1663R so - 8 so - 8 applications ? general led light ing driver with dimming function ? general purpose constant current source ? led backlighting driver ? smart led lighting note s: 1 . no purposely added lead. fully eu directive 2002/95/ec (rohs) & 2011/65/eu (rohs 2) compliant. 2. see http://www.diode s.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. a p w m p w m d c o m p c s g n d f b o u t v c c 1 2 3 4 8 6 5 7 n c f b c s g n d o u t a p w m v c c c o m p 1 2 3 4 8 6 5 7
al1663/AL1663R document number: ds 38466 rev. 1 - 2 2 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r typical applications circuit al1663 flyback application circuit al1663 buck - boost application circuit AL1663R flyback application circuit t 1 o u t + v c c o u t c s g n d u 1 r 5 r 6 r 4 d 1 c 6 r t h a c i n p u t f 1 v r 1 d b 1 c 2 l 1 c 1 r c s r 1 0 f b c o m p d 2 c 5 r 1 4 c 7 d 3 q 1 c c o m p a u x p w m d r 9 d 4 a l 1 6 6 3 a p w m r c o m p c v c c t 1 o u t v c c o u t c s g n d r 5 r 6 r 4 d 1 c 6 r t h a c i n p u t f 1 v r 1 d b 1 c 2 l 1 c 1 r c s f b c o m p q 1 c c o m p a u x p w m d r 9 d 4 a l 1 6 6 3 r c o m p c v c c d 3 + r 1 1 a p w m t 1 o u t + v c c o u t c s g n d u 1 r 5 r 6 r 4 d 1 c 6 r t h a c i n p u t f 1 v r 1 d b 1 c 2 l 1 c 1 r c s r 1 0 f b c o m p d 2 c 5 r 1 4 c 7 d 3 q 1 c c o m p a u x n c r 9 d 4 a p w m r c o m p c v c c a l 1 6 6 3 r
al1663/AL1663R document number: ds 38466 rev. 1 - 2 3 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r pin description s pin number pin name function al1663 AL1663R 1 8 apwm analog dimming input pin o r pwm signal input pin in pwm dimming mode 2 C pwmd pwm d signal input pin in pwm - to - dc dim ming mode C 1 nc not connected 3 7 comp loop compensation pin 4 3 cs c urrent s ens e pin, c onnect this pin to the source of the primary switch 5 4 gnd ground 6 5 out gate driver output 7 6 vcc supply voltage of gate driver and control circuits of the ic 8 2 fb the feedback voltage sensing from the auxiliary winding functional block diagram a(b) a for al1663 b for AL1663R v a l l e y d e t e c t o r l o g i c a l c o n t r o l u v l o & b i a s d r i v e r - + c o m p f b o v p c s v c c o u t g m o t p g n d d i m c o n t r o l v r e f p w m d a p w m b u f f e r - + 1 . 2 v o c p t f p v r e f v r e f t e m p e r a t u r e d e t e c t o r t f p o t p 1 ( 8 ) 2 3 ( 7 ) 4 ( 3 ) 5 ( 4 ) 8 ( 2 ) 7 ( 6 ) 6 ( 5 )
al1663/AL1663R document number: ds 38466 rev. 1 - 2 4 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r absolute maximum ratings (@ t a = +25c, unless otherwise specified.) (note 4) symbol parameter rating unit v cc power supply voltage - 0.3 to 30 v v cs voltage at cs to gnd - 0.3 to 7 v v fb fb i nput - 0.3 to 7 v v comp loop c ompensation p in - 0.3 to 7 v v out driver output voltage - 0.3 to 20 v v pwmd voltage at pwm d to gnd - 0.3 to 7 v v apwm voltage at apwm to gnd - 0.3 to 7 v t j operating junction temperature - 40 to + 150 oc t stg storage temperature - 65 to + 150 oc t lead lead temperature (soldering, 10 sec) + 300 oc p d power dissipation at t a = + 50 oc 0.65 w ja thermal resistance ( junction to ambient ) 150 oc /w jc thermal resistance (junction to case) 23 c/w C note: 4. stresses greater than those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating condi tions is not implied. exposure to absolute maximum ratings for extended periods may affect device reliability. all voltages unless otherwise stated and measured with respect to gnd. recommended operating conditi ons (@ t a = +25c, unless otherwise specified.) symbol parameter min max unit t a ambient temperature (note 5 ) - 40 + 105 c note: 5 . the device may operate normally at + 125 c ambient temperature under the condition not triggers temperature pro tection .
al1663/AL1663R document number: ds 38466 rev. 1 - 2 5 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r electrical characteristics (@ t a = +25c, unless otherwise specified.) symbol parameter conditions min typ max units uvlo section v cc _ th startup threshold voltage C opr _ min minimal operating voltage after tu rn on 7 7. 8 8.5 v v cc _ ovp vcc ovp voltage C standby current section i st startup current v cc = v cc _ th - 0.5v, b efore start up C C cc operating current fb, cs connect to gnd, c gate = 100pf C C cc _ ovp shunt current in ovp mode v cc > v cc_ovp C C drive output section t r output voltage rise time (note 6 ) c l = 1nf C C f output voltage fall time (note 6 ) c l = 1nf C C out _ clamp output clamp voltage v cc = 20v 13 14 15 v t on _ min minimum on time (note 6 ) C C C on _ max maximum on time C C C off _ max maximum off time C C C off _ min minimum off time C C C max maximum frequency C C C internal cs reference v ref internal reference voltage C cs _ ocp primary cur rent clamp voltage C C C error amplifier gm trans - conductance C C C source amplifier source current C C C feedback input section v fb _ cv fb cv threshold C apwm section v apwm _ l pwm signal l ow threshold voltage C C C apwm _ h pwm signal high threshold voltage C C C C C C pwmd section v pwm_l pwm signal low threshold voltage C C C pwm_h pwm signal high threshold voltage C C C thermal fold - back section t reg overheating temperature regulation (note 6 ) C C C o c over temperature protection section C C C C o c note s : 6 . these parameters, although guaranteed by design, are not 100% tested in production. 7 . the device will latch when otp happens and the device wont operate constantly at this temperature.
al1663/AL1663R document number: ds 38466 rev. 1 - 2 6 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r performance characteristics ( n ote 8 ) start up threshold voltage vs. ambient temperature minim um operating voltage vs. ambient temperature operating current vs . ambient temperature fb cv threshold vs. ambient temperature internal reference voltage vs. ambient temperature fb cv threshold vs. v cc voltage -40 -20 0 20 40 60 80 100 120 18.0 18.5 19.0 19.5 20.0 v cc_th (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 0.9 1.0 1.1 1.2 1.3 1.4 i cc (ma) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 1.2 1.3 1.4 1.5 1.6 1.7 v fb_cv (v) ambient temperature ( o c) -40 -20 0 20 40 60 80 100 120 7.0 7.2 7.4 7.6 7.8 8.0 v opr_min (v) ambient temperature ( o c) 9 12 15 18 21 24 27 1.2 1.3 1.4 1.5 1.6 1.7 1.8 v fb_cv (v) v cc voltage(v) -40 -20 0 20 40 60 80 100 120 288 292 296 300 304 308 312 v ref (mv) ambient temperature ( o c)
al1663/AL1663R document number: ds 38466 rev. 1 - 2 7 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r performance characteristics ( cont. ) internal reference voltage vs. v cc voltage note : 8 . these electr ical characteristics are tested under dc condition. the ambient temper ature is equal to the junction temperature of the device. application information the al1663/AL1663R is a constant current high pf flyback and buck - boost controller with primary side regulation (psr), targeting led lighting applications. the device elimin ates the opto - couplers or the secondary feedback circuits, which will help to cost down the whole system. high power factor is achieved by constant on time operation. in order to reduce the switching losses and improve emi performance, quasi - resonant switc hing mode is applied. the al1663/AL1663R integrates multiple protections including uvlo protection, v cc over voltage protection, output open voltage protection, over current protection, thermal fold - back protection and over temperature protection. the al16 63/AL1663R can support multiple dimming modes including analog dimming mode, pwm - to - dc dimming mode and pwm dimming. figure 1 . al1663 typical flyback application schematic figure 2. AL1663R flybac k application circuit t 1 o u t + v c c o u t c s g n d u 1 r 5 r 6 r 4 d 1 c 6 r t h a c i n p u t f 1 v r 1 d b 1 c 2 l 1 c 1 r c s r 1 0 f b c o m p d 2 c 5 r 1 4 c 7 d 3 q 1 c c o m p a u x p w m d r 9 d 4 a l 1 6 6 3 a p w m r c o m p c v c c t 1 o u t + v c c o u t c s g n d u 1 r 5 r 6 r 4 d 1 c 6 r t h a c i n p u t f 1 v r 1 d b 1 c 2 l 1 c 1 r c s r 1 0 f b c o m p d 2 c 5 r 1 4 c 7 d 3 q 1 c c o m p a u x n c r 9 d 4 a l 1 6 6 3 r a p w m r c o m p c v c c 9 12 15 18 21 24 27 290 295 300 305 310 v ref (mv) v cc voltage(v)
al1663/AL1663R document number: ds 38466 rev. 1 - 2 8 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r application information (cont.) start - up after ac supply is powered on, the capacitor cvcc across v cc and gnd pin will be charged up by bus voltage through a start - up resistor r th . once v cc reaches v cc _ th , the internal blocks start to work. v cc will be supplied by v bus until the auxiliary winding of flyback transformer could supply enough energy to maintain v cc above v opr _ min . if v cc voltage is lower than v opr _ min switch will be turned off. after v cc exceeds v cc _ th , the drive block wont start to switch on/off signals until v comp is over the initial voltage v comp _ st which can be programmed by r comp . the formula is shown as below. such design can program startup on time to reduce the startup time or reduce the output overshoot current . where v comp_st is the pre - charged voltage of comp pin. r comp is shown as f igure s 1 and 2. generally, a big capacitance of c comp is necessary to achieve high power factor and stabilize the system loop (1f to 2f is recommended) . the pre - charged voltage in start - up procedure can be programmed by r comp . protections 1. output open protection (ovp) the output voltage is reflected by the voltage on transformers auxiliary winding. both fb pin and v cc pin of ic integrate over voltage protection function. when there is a rapid line and load transient, the output voltage may exceed the regulated value. if v cc exceeds v cc _ ovp or v fb exceeds v fb _ cv , the over voltage protection will be triggered, switch will be turned off and v cc will be di scharged. once v cc is below v opr _ min . the ic will shut down and be power ed on again by bus voltage through start up resistor. thus, output over voltage depends on the minimum voltage between both ovp protections limitation. it can be gotten by below for mula. where v ovp is the output over voltage setting; r 5 and r6 that is shown as f igure 1 divide reflected voltage. n aux is the turns of auxiliary wind; n s is turns of the secondary wind. v cc_ovp is ovp voltage of v cc. 2. output short protection (osp) when the output is shorted, the output voltage is clamped to zero. the output voltage of the auxiliary winding, which is prop ortional to the output winding, will drop down too. once v cc is below v opr _ min , the ic will shut down and power on again by the bus voltage through the start up resistor. 3. over current protection (ocp) the al1663/AL1663R has a build - in cycle by cycle over current protection of primary inductor current. when cs pin voltage reaches the voltage v cs_o cp , switch will be turn ed off until next switch period. the maximum peak current (i peak (max) ) of the inductor can be calculated as below: where v cs _ ocp means primary current clamp voltage that is 1.2v. r cs is current sense r esister which is shown as figure s 1 and 2. 4. thermal fold - back protection (tfp) the al1663/AL1663R has thermal fold - back function: it adopts self - adaptive control method which can prevent the system from breaking down caused by over temperature. the over heating temperature is set at +145c. when the temperature of the ic is higher than this point; the device will decrease the voltage reference of the cs linearly till otp happens. by this way, the device can limit systems input pow er at high ambient tempe rature, preventing systems temperature increases further. comp st comp r a v v ? ? ? ? 700 4 . 1 _ __ 56 , 6 ss ovp cc ovp fb cv aux aux nn rr v min v v n n r ?? ? ? ? ? ? ?? ?? ? ? _ cs ocp peak max cs v i r ?
al1663/AL1663R document number: ds 38466 rev. 1 - 2 9 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r application information (cont.) 5. over temperature protection (otp) the al1663/AL1663R has build - in over temperature protection (otp) function. when the temperature goes up to +165c, the over temperature protection will be triggered, which leads to a latch mode protection. when otp happens, the system need to be powered off and on again to restart. output constant - current control according to the definition of mean output current, the mean out put current can be obtained as below. where i o_mean is the mean output current; i sp is secondary peak current of transformer; t ons is discharge time of secondary side of transformer; t sw is the switch period. accordi ng to the principle of al1663/AL1663R close loop control, the voltage of r cs will be sampled when switch is turned off and the value will be held until discharge time t ons is over. it can be described by following formula: where i p is primary peak current of transformer; r cs is current sense resister which is shown as figure s 1 and 2. t ons is discharge time of secondary side of transformer; t sw is the switch period. v ref is internal reference voltage that is equal to 0.3v . the peak current at secondary side has following relationship with primary side peak current, if the effect of the leakage inductor is neglect ed. where n ps is the turns ratio of flyback transformer (n ps =1 for buck - boost); i p is the pr imary peak current of the transformer. according to these above formulas, the mean output current can be induced finally by below expressions . where i o_mean is the mean output current; r cs is current sense resister which is s hown as figure s 1 and 2; v ref is internal reference voltage that is equal to 0.3v; n ps is the turns ratio of flyback transformer ( n ps =1 for buck - boost); therefore, the constant output current control can be realized with appropriate parameter design. pf and thd compensation circuit for normal application, al1663/AL1663R can provide high pf and low thd. but there is a phase difference between input current and input voltage especially at high input voltage, thus pf and thd may not be the best situation. t he below circuit can optimize this situation by reduc ing the phase difference. v bus is connected to the voltage point after rectifier. in normal application resister r n1 is usually a several hundred k resister, r n2 is a hundred resister, c n1 is a severa l f capacitor. pf and thd can be improved by debugging these components. figure 3 . pf and thd o ptimization c ircuit dt t t i i sw ons sp mean o ? ? ? ? ? ? ? 0 _ 2 1 1 dt t t r i v sw ons cs p ref ? ? ? ? ? ? ? 0 1 sp ps p i n i ?? _ 2 ps ref o mean cs nv i r ? ? ? c o m p c c o m p r c o m p v b u s c n 1 r n 1 r n 2
al1663/AL1663R document number: ds 38466 rev. 1 - 2 10 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r application information (cont.) dimming mode the al 1663 can support three dimming modes: analog dimming, pwm - to - dc dimming and pwm dimming. the AL1663R can support two dimming modes: analog dimming and pwm dimming. 1. analog dimming mode in analog dimming mode, the dimming signal is added to apwm pin di rectly to realize dimming function. the setting circuit is shown as f igure 4 . a capacitance of hundreds nf is recommended for c apwm . when v apwm is higher than 2.4v, the driver will output 100% of rated current; when the voltage v apwm is in the range from 0 .3 to 2.4v , the output current will change linearly with the voltage v apwm . when v apwm is lower than 0.3v, switch will be turned off and the output current drops to zero. the dimming curve is shown as f igure 5 and the dimming range is from 12% to 100% . figure 4 . analog d imming s etting c ircuit figure 5 . analog d imming curve 2. pwm - to - dc dimming mode in pwm - to - dc dimming mode, pwm dimming signal is added to pwmd pin. the setting circuit is shown as below figure 6 . a capacitance of hundreds nf is recommended for c apwm . the duty cycle of the dimming signal d dim is reflected by the voltage on apwm pin v apwm . where d dim is duty of pwm signal; v apwm is th e voltage of apwm pin. thus the output current will change with the duty cycle of dimming signal d dim . for example, the dimming curve is shown as f igure 7 . the dimming range is 12% to 100%. figure 6 . pwm to dc d imming s etting c ircuit figure 7 . pwm to dc d imming curve (pwm f requency is 500hz) 3. pwm dimming mode in pwm dimming mode, dimming signal will be added to apwm pin .the setting circuit is shown as f igure 8 . the output current is chopped by the dimming signal directly. the logic high level of the dimming signal need to be higher 2.4v while the logic low level is lower than 0. 3v. switch is turn ed off at logic low level. the dimming curve is shown as f igure 9 . the dimmin g range can be 100 to 1% with 1 khz f requency of pwm signal. figure 8 . pwm d imming s etting c ircuit figure 9 . pwm d imming curve (pwm f requency is 1 khz) 0 20 40 60 80 100 0 20 40 60 80 100 output current percentage (%) pwm duty (%) 2.4 apwm dim v d v ?? 0.0 0.5 1.0 1.5 2.0 2.5 3.0 0 20 40 60 80 100 output current percent (%) v apmw (v) 0 20 40 60 80 100 0 20 40 60 80 100 output current percent (%) pwm duty (%) a p w m a l 1 6 6 3 / a l 1 6 6 3 r 0 . 3 - 2 . 4 v d i m m i n g s i g n a l c a p w m a p w m p w m d a l 1 6 6 3 c a p w m r a p w m a l 1 6 6 3 / a l 1 6 6 3 r p w m d i m m i n g s i g n a l
al1663/AL1663R document number: ds 38466 rev. 1 - 2 11 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r application information (cont.) operation parameters design setting the c urrent s ense r esistor r cs the current sense resistance can be calculated as following: where i o_mean is the mean output current; r cs is current sense resister which is shown as figure s 1 and 2; v ref is internal reference voltage that is equal to 0.3v; n ps is the turns ratio of flyback transformer (n ps =1 for buck - boost) . setting transformer selection (t1) n ps is limited by the electrical stress of the switch mosfet, can be calculated by below formula. where v mos_ (br)ds is the breakdown voltage of the switch mosfet. v in_max is the max rated input voltage. ? v s is the overshoot voltage clamped by rcd snobbier during off time. v o is the output voltage. v d _ f is the forward voltage of secondary diode. n ps is the turns r atio of flyback transformer (n ps =1 for buck - boost); for boundary conduction mode and constant on time method, the peak current of primary inductance can be calculated as below. where v in _ rms is the rate input voltage; i p is the pri mary inductance current. n ps is the turns ratio of flyback transformer (n ps =1 for buck - boost); i o_mean is the mean output current; v o is the output voltage . the switching frequency is not constant for al1663/AL1663R due to boundary conduction mode . to s et t he minimum switching frequency f min at the crest of the minimum ac input, primary inductance can be obtained by below formula. where v in _ rms is the rate input voltage; i p is the primary inductance current. n ps is the turns ratio of flyback transformer (n ps =1 for buck - boost); i o_mean is the mean output current; v o is the output voltage; f min is t he minimum switching frequency at the crest of the minimum ac input . according to the faradays law, the winding number of the inductan ce can be calculated by: where , a e is the core effective area . b m is the maximum magnetic flux density . _ 2 ps ref cs o mean nv r i ? ? ? _( ) _ _ 90% 2 mos br ds in max s ps o d f v v v n vv ? ? ? ? ? ? ? _ _ 0 _ 2 2 sin( ) sin( ) 2 sin( ) o mean p in rms ps in rms ps i i v nd v n vo ? ? ? ?? ? ?? ? ?? ?? ? ? ? ? ? _ _ 2 ( 2 ) in rms ps o p p in rms ps o min v n v l i v n v f ? ? ? ? ? ? ? pp p em li n ab ? ? ? p s ps n n n ?
al1663/AL1663R document number: ds 38466 rev. 1 - 2 12 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r ordering information part number package code package 13 tape and reel quantity part number suffix al1663s - 13 s s o - 8 40 00/tape & reel - 13 AL1663Rs - 13 s s o - 8 40 00/tape & reel - 13 marking information a l 1 6 6 3 x x - x p a c k a g e s : s o - 8 p r o d u c t v e r s i o n p a c k i n g 1 3 : 1 3 " t a p e & r e e l p r o d u c t n a m e b l a n k : a l 1 6 6 3 r : a l 1 6 6 3 r a l 1 6 6 3 ( t o p v i e w ) y y w w x x l o g o w w : w e e k : 0 1 ~ 5 2 ; 5 2 y y : y e a r : 1 3 , 1 4 , 1 5 ~ 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 p a r t n u m b e r a l 1 6 6 3 r ( t o p v i e w ) y y w w x x l o g o w w : w e e k : 0 1 ~ 5 2 ; 5 2 y y : y e a r : 1 3 , 1 4 , 1 5 ~ 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 p a r t n u m b e r
al1663/AL1663R document number: ds 38466 rev. 1 - 2 13 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r package outline dimensions (all d imensions in mm . ) (1) package type: so - 8 0 8 1 7 r 0 . 1 5 0 ( 0 . 0 0 6 ) r 0 . 1 5 0 ( 0 . 0 0 6 ) 1 . 0 0 0 ( 0 . 0 3 9 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 5 1 0 ( 0 . 0 2 0 ) 1 . 3 5 0 ( 0 . 0 5 3 ) 1 . 7 5 0 ( 0 . 0 6 9 ) 0 . 1 0 0 ( 0 . 0 0 4 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 3 . 8 0 0 ( 0 . 1 5 0 ) 4 . 0 0 0 ( 0 . 1 5 7 ) 7 7 2 0 : 1 d 1 . 2 7 0 ( 0 . 0 5 0 ) t y p 0 . 1 5 0 ( 0 . 0 0 6 ) 0 . 2 5 0 ( 0 . 0 1 0 ) 8 d 5 . 8 0 0 ( 0 . 2 2 8 ) 6 . 2 0 0 ( 0 . 2 4 4 ) 0 . 6 0 0 ( 0 . 0 2 4 ) 0 . 7 2 5 ( 0 . 0 2 9 ) 0 . 3 2 0 ( 0 . 0 1 3 ) 8 0 . 4 5 0 ( 0 . 0 1 7 ) 0 . 8 2 0 ( 0 . 0 3 2 ) 4 . 7 0 0 ( 0 . 1 8 5 ) 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 . o p t i o n 1 o p t i o n 1 o p t i o n 2 0 . 3 5 0 ( 0 . 0 1 4 ) t y p t y p t y p 9 ~ 9 ~
al1663/AL1663R document number: ds 38466 rev. 1 - 2 14 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r suggested pad layout (1) package type: so - 8 dimensions z (mm)/(inch) g (mm)/(inch) x (mm)/(inch) y (mm)/(inch) e (mm)/(inch) value 6.900/0.272 3.900/0.154 0.650/0.026 1.500/0.059 1.270/0.050 g r i d p l a c e m e n t c o u r t y a r d z g y e x
al1663/AL1663R document number: ds 38466 rev. 1 - 2 15 of 15 www.diodes.com may 2016 ? diodes incorporated n ew product al1663/ al16 63r 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 warrant ies 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 ch anges 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 conve y 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 incorporated 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 sales channel. shou ld customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall ind emnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arisi ng 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 docu ment is the final and determinative format released by diodes incorporated. 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 o f 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 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 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 perform can be reasonably expected to cause 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 d evices 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, n otwithstanding any devices - or systems - related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorpora ted and its representatives against any damages arising out of the use of diodes inc orporated products in such safety - critical, life support devices or systems. copyright ? 201 6 , diodes incorporated www.diodes.com

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