View APW7178A_7290338.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 a n p e c r e s e r v e s t h e r i g h t t o m a k e c h a n g e s t o i m p r o v e r e l i a b i l i t y o r m a n u f a c t u r a b i l i t y w i t h o u t n o t i c e , a n d a d v i s e c u s t o m e r s t o o b t a i n t h e l a t e s t v e r s i o n o f r e l e v a n t i n f o r m a t i o n t o v e r i f y b e f o r e p l a c i n g o r d e r s . 1 . 5 m h z , 1 a s y n c h r o n o u s b u c k r e g u l a t o r f e a t u r e s g e n e r a l d e s c r i p t i o n 1a output current wide 2.7v~6.0v input voltage fixed 1.5mhz switching frequency low dropout operating at 100% duty cycle synchronous rectifier 0.6v reference voltage <0.5 m a input current during shutdown short-circuit protection over-temperature protection available in tdfn2x2-6 packages lead free and green devices available (rohs compliant) APW7178A is a 1.5mhz high efficiency monolithic syn- chronous buck regulator. design with current mode scheme, the APW7178A is stable with ceramic output capacitor. input voltage from 2.7v to 6.0v makes the APW7178A ideally suited for single li-ion battery pow- ered applications. 100% duty cycle provides low dropout operation, extending battery life in portable electrical devices. the internally fixed 1.5mhz operating frequency allows the using of small surface mount inductors and capacitors. the synchronous switches included inside increase the efficiency and eliminate the need of an ex- ternal schottky diode. the APW7178A is available in tdfn2x2-6 packages. s i m p l i f i e d a p p l i c a t i o n c i r c u i t a p p l i c a t i o n s hd stb bt mouse pnd instrument portable instrument p i n c o n f i g u r a t i o n vin gnd run fb apw 7178 a sw v in v out l 1 2 . 2 m h r 2 r 1 c 3 c 1 4 . 7 m f ( mlcc ) c 2 10 m f ( mlcc ) i in r 1 1 m w is recommended r 2 200 k w is recommended place c 1 closed vin / gnd . without via hole is recommended . nc apw 7178 a tdfn 2 x 2 - 6 ( top view ) 1 6 5 4 3 2 nc vin run fb sw gnd
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 2 o r d e r i n g a n d m a r k i n g i n f o r m a t i o n n o t e : a n p e c l e a d - f r e e p r o d u c t s c o n t a i n m o l d i n g c o m p o u n d s / d i e a t t a c h m a t e r i a l s a n d 1 0 0 % m a t t e t i n p l a t e t e r m i n a t i o n f i n i s h ; w h i c h a r e f u l l y c o m p l i a n t w i t h r o h s . a n p e c l e a d - f r e e p r o d u c t s m e e t o r e x c e e d t h e l e a d - f r e e r e q u i r e m e n t s o f i p c / j e d e c j - s t d - 0 2 0 d f o r m s l c l a s s i f i c a t i o n a t l e a d - f r e e p e a k r e f l o w t e m p e r a t u r e . a n p e c d e f i n e s ? g r e e n ? t o m e a n l e a d - f r e e ( r o h s c o m p l i a n t ) a n d h a l o g e n f r e e ( b r o r c l d o e s n o t e x c e e d 9 0 0 p p m b y w e i g h t i n h o m o g e n e o u s m a t e r i a l a n d t o t a l o f b r a n d c l d o e s n o t e x c e e d 1 5 0 0 p p m b y w e i g h t ) . a b s o l u t e m a x i m u m r a t i n g s ( n o t e 1 ) symbol parameter rating unit v in input bias supply voltage ( vin to gnd) - 0.3 ~ 7 v run, fb, sw to gnd voltage - 0.3 ~ v in +0.3 v p d power dissipation internally limited w maximum junction temperature 150 o c t stg storage temperature - 65 ~ 150 o c t sdr maximum lead soldering temperature , 10 seconds 26 0 o c n o t e 1 : s t r e s s e s b e y o n d t h o s e l i s t e d u n d e r " a b s o l u t e m a x i m u m r a t i n g s " m a y c a u s e p e r m a n e n t d a m a g e t o t h e d e v i c e . t h e s e a r e s t r e s s r a t i n g s o n l y a n d f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s b e y o n d t h o s e i n d i c a t e d u n d e r " r e c o m - m e n d e d o p e r a t i n g c o n d i t i o n s " i s n o t i m p l i e d . e x p o s u r e t o a b s o l u t e m a x i m u m r a t i n g c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y a f f e c t d e v i c e r e l i a b i l i t y . t h e r m a l c h a r a c t e r i s t i c s symbol parameter typical value unit q ja junction - to - ambient resistance in f ree a ir (note 2) tdfn2x2 - 6 165 o c/w note 2: q ja is measured with the component mounted on a high effective thermal conductivity test board in free air. symbol parameter range unit v in input bias supply voltage ( vin to gnd) 2.7 ~ 6 v v out converter output voltage 0.6 ~ v in v i out converter output current 0 ~ 1 a l1 converter output inductor 1.0 ~ 10 m h r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s ( n o t e 3 ) apw 7178 a apw 7178 a qb : 78 a x x - date code package code qb : tdfn 2 x 2 - 6 operating ambient temperature range i : - 40 to 85 o c handling code tr : tape & reel assembly material g : halogen and lead free device handling code temperature range package code assembly material
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 3 e l e c t r i c a l c h a r a c t e r i s t i c s apw 7178 a symbol parameter test conditions min . typ . max . unit supply voltage and current v in input voltage range 2.7 - 6 v i sd shutdown input current run = gnd - - 0.5 m a power - on - reset (por) and lockout voltage thresholds uvlo threshold 2.1 2 .35 2.6 v uvlo hysteresis - 0.1 - v reference voltage v ref reference voltage v in =2.7v~6v, t a = - 40~85 o c 0.588 0.6 0.612 v output voltage accuracy 0a < i out < 1a - 2.5 - +2.5 % i fb fb input current - 50 - 50 na internal power mosfets f sw switching frequency 1.2 1.5 1.8 mhz foldback frequency v fb = 0.1v - 210 - khz foldback threshold voltage on fb v fb falling - 0.2 - v foldback hysteresis - 50 - mv r p - fet high side n - fet switch on r esistance i sw =200ma - 0.28 - w r n - fet low side p - fet switc h on r esistance i sw =200ma - 0.25 - w minimum on - time - - 100 ns maximum duty cycle - - 100 % protection i lim maximum inductor current - limit i p - fet , 2.7v ?? v i n ?? 6v 1.4 1.6 - a t otp over - temperature protection t j rising - 150 - over - temperature pr otection hysteresis t j falli ng - 30 - c u n l e s s o t h e r w i s e s p e c i f i e d , t h e s e s p e c i f i c a t i o n s a p p l y o v e r v i n = 3 . 6 v a n d t a = 2 5 o c . symbol parameter range unit c in converter input capacitor 4.7 ~100 m f c out converter output capacitor 4.7 ~100 m f t a ambient temperature - 40 ~ 85 o c t j junction temperature - 4 0 ~ 125 o c r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s ( n o t e 3 ) ( c o n t . ) n o t e 3 : r e f e r t o t h e t y p i c a l a p p l i c a t i o n c i r c u i t
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 4 e l e c t r i c a l c h a r a c t e r i s t i c s ( c o n t . ) u n l e s s o t h e r w i s e s p e c i f i e d , t h e s e s p e c i f i c a t i o n s a p p l y o v e r v i n = 3 . 6 v a n d t a = 2 5 o c . apw 7178 a symbol parameter test conditions min . typ . max . unit start - up and shutdown t ss soft - start duration (note 4) - 0.7 - ms run input high threshold v in = 2.7v~6v - - 1 v run input low threshold v in = 2.7v~6v 0.4 - - v run leakage current v run = 5v, v in = 5v - 1 - 1 m a
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 5 t y p i c a l o p e r a t i n g c h a r a c t e r i s t i c s ( r e f e r t o t h e a p p l i c a t i o n c i r c u i t i n t h e s e c t i o n ? t y p i c a l a p p l i c a t i o n c i r c u i t s ? , v i n = 3 . 6 v , v o u t = 1 . 8 v , t a = 2 5 o c u n l e s s o t h e r w i s e s p e c i f i e d ) o n r e s i s t a n c e ( w ) supply voltage, v in (v) 0.00 0.05 0.10 0.15 0.20 0.25 0.30 0.35 2 2.5 3 3.5 4 4.5 5 5.5 6 supply voltage vs. on resistance r n-fet r p-fet r e f e r e n c e v o l t a g e , v r e f ( v ) supply voltage vs. reference voltage supply voltage, v in (v) 0.55 0.56 0.57 0.58 0.59 0.6 0.61 0.62 0.63 0.64 0.65 2 2.5 3 3.5 4 4.5 5 5.5 6 efficiency vs . load current e f f i c i e n c y ( % ) load current , i out ( a ) 0 10 20 30 40 50 60 70 80 90 100 0 0 . 1 0 . 2 0 . 3 0 . 4 0 . 5 0 . 6 0 . 7 0 . 8 0 . 9 1 v in = 3 . 3 v v in = 5 v v out = 1 . 8 v l = 2 . 2 h c out = 10 f efficiency vs . load current e f f i c i e n c y ( % ) load current , i out ( a ) 0 10 20 30 40 50 60 70 80 90 100 0 0 . 1 0 . 2 0 . 3 0 . 4 0 . 5 0 . 6 0 . 7 0 . 8 0 . 9 1 v in = 3 . 3 v v in = 5 v v out = 1 . 2 v l = 2 . 2 h c out = 10 f
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 6 o p e r a t i n g w a v e f o r m s ( r e f e r t o t h e a p p l i c a t i o n c i r c u i t i n t h e s e c t i o n ? t y p i c a l a p p l i c a t i o n c i r c u i t s ? , v i n = 3 . 6 v , v o u t = 1 . 8 v , t a = 2 5 o c u n l e s s o t h e r w i s e s p e c i f i e d ) load transient response 300ma 2 1 v out ,100mv/div, ac i out , 0.5a/div, dc 1a l=2.2 h, v in =5v, v out =1.8v, c out =10 f time: 100 s/div normal operation 2 1 v out, 200mv/div,ac v in, 0.5v/div 1.5v 2.5v i out = 100ma time: 500ns/div 3 i l , 500mv/div, dc v out ,20mv/div, ac v sw ,2v/div, dc l=2.2 h, v in =5v, v out =1.2v, c out =10 f 3 1 2 soft start v out ,1v/div, dc i in , 200ma/div l=2.2 h, v in =5v, c out =10 f time: 100 s/div v run
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 7 p i n d e s c r i p t i o n pin no. name f unction 1 nc no internal connection. 2 run enable control input. forcing this pin above 1.0v enables the device. forcing this pin below 0. 4 v shuts it down. in shutdown, all functions are disabled to decrease the supply current below 0.5 m a . do not leave run pin floating. 3 vin device and converter supply pin . must be closely decoupled to gnd with a 4.7 m f or greater ceramic capacitor. 4 sw switch node connected to inductor. this pin connects to the drains of the internal main and synchrono us power mosfets switches. 5 gnd power and signal ground. 6 fb the feedback voltage is decided by an external resistive divider across the output. b l o c k d i a g r a m oscillator logic control sw over - temperature protection v ref 0 . 6 v eamp comp i cmp soft - start error amplifier current - limit slope compensation vin current sense amplifier shutdown control ? fb run gnd gate driver
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 8 t y p i c a l a p p l i c a t i o n c i r c u i t vin gnd run fb apw 7178 a sw v in v out l 1 2 . 2 m h r 2 r 1 c 3 ( option ) c 1 4 . 7 m f ( mlcc ) c 2 10 m f ( mlcc ) i in r 1 1 m w is recommended r 2 200 k w is recommended place c 1 closed to vin / gnd without via hole is recommended nc
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 9 f u n c t i o n d e s c r i p t i o n main control loop the APW7178A is a constant frequency, synchronous rec- tifier and current-mode switching regulator. in normal operation, the internal p-channel power mosfet is turned on each cycle. the peak inductor current at which icmp turn off the p-fet is controlled by the voltage on the comp node, which is the output of the error amplifier (eamp). an external resistive divider connected between v out and ground allows the eamp to receive an output feedback voltage v fb at fb pin. when the load current increases, it causes a slightly decrease in v fb relative to the 0.6v reference, which in turn causes the comp volt- age to increase until the average inductor current matches the new load current. enable/shutdown driving run to the ground places the APW7178A in shut- down mode. when in shutdown, the internal power mosfets turn off, all internal circuitry shuts down and the quiescent supply current reduces to 0.5 m a maximum. slope compensation and inductor peak current the APW7178A is a peak current mode pwm step down converter. to prevent sub-harmonic oscillations, the APW7178A sense the peak current and add slope com- pensation to stable the converter. it is accomplished in- ternally by adding a compensating ramp to the inductor current signal at duty cycles in excess of 40%. normally, this results in a reduction of maximum inductor peak cur- rent for duty cycles > 40%. however, the APW7178A uses a special scheme that counteracts this compensating ramp, which allows the maximum inductor peak current to remain unaffected throughout all duty cycles. dropout operation as the input supply voltage decreases to a value ap- proaching the output voltage, the duty cycle increases toward the maximum on time. further, reduction of the supply voltage forces the main switch to remain on for more than one cycle until it reaches 100% duty cycle. the input voltage minus the voltage drop will determine the output voltage across the p-fet and the inductor. an important detail to remember is that on resistance of p-fet switch will increase at low input supply voltage. therefore, the user should calculate the power dissipa- tion when the APW7178A is used at 100% duty cycle with low input voltage. over-temperature protection (otp) the over-temperature circuit limits the junction tempera- ture of the APW7178A. when the junction temperature exceeds 150 o c, a thermal sensor turns off the both power mosfets, allowing the devices to cool. the thermal sen- sor allows the converters to start a soft-start process and regulate the output voltage again after the junction tem- perature cools by 30 o c. the otp is designed with a 30 o c hysteresis to lower the average junction temperature (t j ) during continuous thermal overload conditions, in- creasing the lifetime of the device.
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 0 a p p l i c a t i o n i n f o r m a t i o n input capacitor selection b e c a u s e b u c k c o n v e r t e r s h a v e a p u l s a t i n g i n p u t c u r r e n t , a l o w e s r i n p u t c a p a c i t o r i s r e q u i r e d . t h i s r e s u l t s i n t h e b e s t i n p u t v o l t a g e f i l t e r i n g , m i n i m i z i n g t h e i n t e r f e r e n c e w i t h o t h e r c i r c u i t s c a u s e d b y h i g h i n p u t v o l t a g e s p i k e s . a l s o , t h e i n p u t c a p a c i t o r m u s t b e s u f f i c i e n t l y l a r g e t o s t a - b i l i z e t h e i n p u t v o l t a g e d u r i n g h e a v y l o a d t r a n s i e n t s . f o r g o o d i n p u t v o l t a g e f i l t e r i n g , u s u a l l y a 4 . 7 m f i n p u t c a p a c i - t o r i s s u f f i c i e n t . i t c a n b e i n c r e a s e d w i t h o u t a n y l i m i t f o r b e t t e r i n p u t - v o l t a g e f i l t e r i n g . c e r a m i c c a p a c i t o r s s h o w b e t t e r p e r f o r m a n c e b e c a u s e o f t h e l o w e s r v a l u e , a n d t h e y a r e l e s s s e n s i t i v e a g a i n s t v o l t a g e t r a n s i e n t s a n d s p i k e s c o m p a r e d t o t a n t a l u m c a p a c i t o r s . p l a c e t h e i n p u t c a p a c i t o r a s c l o s e a s p o s s i b l e t o t h e i n p u t a n d g n d p i n o f t h e d e v i c e f o r b e t t e r p e r f o r m a n c e . inductor selection for high efficiencies, the inductor should have a low dc resistance to minimize conduction losses. especially at high-switching frequencies the core material has a higher impact on efficiency. when using small chip inductors, the efficiency is reduced mainly due to higher inductor core losses. this needs to be considered when select- ing the appropriate inductor. the inductor value deter- mines the inductor ripple current. the larger the inductor value, the smaller the inductor ripple current and the lower the conduction losses of the converter. conversely, larger inductor values cause a slower load transient response. a reasonable starting point for setting ripple current, d i l, is 40% of maximum output current. the recommended inductor value can be calculated as below: l sw in out out i f v v 1 v l d ? ? ? ? ? - 3 i l(max) = i out(max) + 1/2 x d i l to avoid the saturation of the inductor, the inductor should be rated at least for the maximum output current of the converter plus the inductor ripple current. output voltage setting in the adjustable version, the output voltage is set by a resistive divider. the external resistive divider is con- nected to the output, allowing remote voltage sensing as ? ? ? ? ? + = ? ? ? ? ? + = 2 r 1 r 1 6 . 0 2 r 1 r 1 v v ref out shown in ?typical application circuits?. a suggestion of maximum value of r2 is 200k w to keep the minimum current that provides enough noise rejection ability through the resistor divider. the output voltage can be calculated as below: output capacitor selection the current-mode control scheme of the APW7178A al- lows the use of tiny ceramic capacitors. the higher ca- pacitor value provides the good load transients response. ceramic capacitors with low esr values have the lowest output voltage ripple and are recommended. if required, tantalum capacitors may be used as well. the output ripple is the sum of the voltages across the esr and the ideal output capacitor. ? ? ? ? ? + ? ? ? ? ? - @ d out sw sw in out out out c f 8 1 esr l f v v 1 v v when choosing the input and output ceramic capacitors, choose the x5r or x7r dielectric formulations. these dielectrics have the best temperature and voltage char- acteristics of all the ceramics for a given value and size. v in v ou t i l n-fet sw i ou t c in c ou t i in esr p-fet i p-fet r 2 200 k w apw 7178 a fb gnd v out r 1 1 m w
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 1 a p p l i c a t i o n i n f o r m a t i o n ( c o n t . ) thermal consideration in most applications, the APW7178A does not dissipate much heat due to its high efficiency. but, in applications where the APW7178A is running at high ambient tem- perature with low supply voltage and high duty cycles, the heat dissipated may exceed the maximum junction tem- perature of the part. if the junction temperature reaches approximately 150c, both power switches will be turned off and the sw node will become high impedance. to avoid the APW7178A from exceeding the maximum junction temperature, the user will need to do some ther- mal analysis. the goal of the thermal analysis is to deter- mine whether the power dissipated exceeds the maxi- mum junction temperature of the part. the power dissi- pated by the part is approximated: p d @ i out 2 x (r p-fet x d+r n-fet x (1-d)) the temperature rise is given by: t r = (p d )( q ja ) where p d is the power dissipated by the regulator, d is duty cycle of main switch d = v out /v in the q ja is the thermal resistance from the junction of the die to the ambient temperature. the junction temperature, t j , is given by: t j = t a + t r where t a is the ambient temperature. output capacitor selection (cont.) i lim i l i peak i out i p-fet d i l the maximum power dissipation on the device can be shown as the following figure: layout consideration for all switching power supplies, the layout is an impor- tant step in the design; especially at high peak currents and switching frequencies. if the layout is not carefully done, the regulator might show noise problems and duty cycle jitter. 1. the input capacitor should be placed close to the vin and gnd. connecting the capacitor and vin/gnd with short and wide trace without any via holes for good input voltage filtering. the distance between vin/gnd to capacitor less than 2mm respectively is recommended. 2. to minimize copper trace connections that can inject noise into the system, the inductor should be placed as close as possible to the sw pin to minimize the noise coupling into other circuits. 3. the output capacitor should be place closed to vout and gnd. 4. since the feedback pin and network is a high imped- ance circuit the feedback network should be routed away from the inductor. the feedback pin and feed- back network should be shielded with a ground plane or trace to minimize noise coupling into this circuit. 5. a star ground connection or ground plane minimizes ground shifts and noise is recommended. junction temperature ( o c) m a x i m u m p o w e r d i s s p a t i o n ( w ) -50 -25 0 25 50 75 100 125 150 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 2 p a c k a g e i n f o r m a t i o n t d f n 2 x 2 - 6 s y m b o l min. max. 0.80 0.00 0.18 0.30 1.00 1.60 0.05 0.60 a a1 b d d2 e e2 e l millimeters a3 0.20 ref tdfn2x2-6 0.30 0.45 1.00 0.008 ref min. max. inches 0.031 0.000 0.007 0.012 0.039 0.063 0.024 0.012 0.018 1.90 2.10 0.075 0.083 1.90 2.10 0.075 0.083 0.20 k 0.008 0.70 0.039 0.028 0.002 0.65 bsc 0.026 bsc note : 1. followed from jedec mo-229 wccc. e l k e 2 pin 1 corner d2 a3 a1 b a d e
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 3 application a h t1 c d d w e1 f 178.0 ? 2.00 50 min. 8.4+2.00 - 0.00 13.0+0.50 - 0.20 1.5 min. 20.2 min. 8.0 ? 0.20 1.75 ? 0.10 3.5 ? 0.05 p 0 p1 p 2 d 0 d1 t a 0 b 0 k 0 tdfn2x2 - 6 4.0 ? 0.10 4.0 ? 0.10 2.0 ? 0.05 1.5+0.10 - 0.00 1.5 min. 0.6+0.00 - 0. 40 2.35 min 2.35 min 1.30 ? 0.20 (mm) d e v i c e s p e r u n i t c a r r i e r t a p e & r e e l d i m e n s i o n s package type unit quantity tdfn2x2 - 6 tape & reel 3000 a e 1 a b w f t p0 od0 b a0 p2 k0 b 0 section b-b section a-a od1 p1 h t1 a d
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 4 t a p i n g d i r e c t i o n i n f o r m a t i o n c l a s s i f i c a t i o n p r o f i l e t d f n 2 x 2 - 6 user direction of feed
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 5 c l a s s i f i c a t i o n r e f l o w p r o f i l e s profile feature sn - pb eutectic assembly pb - free assembly preheat & soak temperature min (t smin ) temperature max (t smax ) time (t smin to t smax ) ( t s ) 100 c 150 c 60 - 120 seconds 150 c 200 c 60 - 1 2 0 seconds average ramp - up rate (t smax to t p ) 3 c/second ma x. 3 c/second max. liquidous temperature ( t l ) time at l iquidous (t l ) 183 c 60 - 150 seconds 217 c 60 - 150 seconds peak package body temperature (t p ) * see classification temp in table 1 see classification temp in table 2 time (t p ) ** within 5 c of the spe cified c lassification t emperature ( t c ) 2 0 ** seconds 3 0 ** seconds average r amp - down rate (t p to t smax ) 6 c/second max. 6 c/second max. time 25 c to p eak t emperature 6 minutes max. 8 minutes max. * tolerance for peak profile temperature (t p ) is defined as a supplier minimum and a user maximum. ** tolerance for time at peak profile temperature (t p ) is defined as a supplier minimum and a user maximum. table 2. pb - free process ? classification temperatures (tc) package thickness volume mm 3 <350 volume mm 3 350 - 2000 volume mm 3 >2000 <1.6 mm 260 c 260 c 260 c 1.6 mm ? 2.5 mm 260 c 250 c 245 c 3 2.5 mm 250 c 245 c 245 c table 1. snpb eutectic process ? classification temperatures (tc) package thickness volume mm 3 <350 volume mm 3 3 350 <2.5 mm 235 c 22 0 c 3 2.5 mm 220 c 220 c test item method description solderability jesd - 22, b102 5 sec, 245 c holt jesd - 22, a108 1000 hrs, bias @ tj=125 c pct jesd - 22, a102 168 hrs, 100 % rh, 2atm , 121 c tct jesd - 22, a104 500 cycles, - 65 c~150 c hbm mil - std - 883 - 3015.7 vhbm ? 2kv mm jesd - 22, a1 15 vmm ? 200v latch - up jesd 78 10ms, 1 tr ? 100ma r e l i a b i l i t y t e s t p r o g r a m
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 1 - s e p . , 2 0 1 2 a p w 7 1 7 8 a w w w . a n p e c . c o m . t w 1 6 c u s t o m e r s e r v i c e a n p e c e l e c t r o n i c s c o r p . head office : no.6, dusing 1st road, sbip, hsin-chu, taiwan, r.o.c. tel : 886-3-5642000 fax : 886-3-5642050 t a i p e i b r a n c h : 2 f , n o . 1 1 , l a n e 2 1 8 , s e c 2 j h o n g s i n g r d . , s i n d i a n c i t y , t a i p e i c o u n t y 2 3 1 4 6 , t a i w a n t e l : 8 8 6 - 2 - 2 9 1 0 - 3 8 3 8 f a x : 8 8 6 - 2 - 2 9 1 7 - 3 8 3 8

▲Up To Search▲

Price & Availability of APW7178A

	To Download APW7178A Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .