90 080216 transfeed automotive series avx multilayer ceramic transient voltage suppressors tvs protection and emi attenuation in a single chip general description avx has combined the best electrical characteristics of its transguard? transient voltage suppressors (tvs) and its feedthru capacitors into a single chip for state-of-the-art overvoltage circuit protection and emi reduction over a broad range of frequencies. this unique combination of multilayer ceramic construction in a feedthru configuration gives the circuit designer a single 0805 chip that responds to transient events faster than any tvs device on the mar- ket today, and provides significant emi attenuation when in the off-state. automotive transfeeds are designed for automotive appli- cations and are aec-q 200 qualified. the reduction in parallel inductance, typical of the feedthru chip construction when compared to the construction of standard tvs or ceramic capacitor chips, gives the transfeed product two very important electrical advan- tages: (1) faster turn-on time. calculated response times of <200 psec are not unusual with this device, and mea- sured response times range from 200 C 250 psec. the transfeed turn-on characteristic is less than half that of an equivalent transguard? part and transguards? clamp transient voltages faster than any other bipolar tvs solution such as diodes; (2) the second electrical advantage of lower parallel inductance, coupled with optimal series inductance, is the enhanced attenuation characteristics of the transfeed product. not only is there significantly greater attenuation at a higher self-resonance frequency, but the roll-off characteristic becomes much flatter, result- ing in emi filtering over a much broader frequency spec- trum. typical applications include filtering/protection on microcontroller i/o lines, interface i/o lines, power line conditioning and power regulation. schematic diagram electrical model in out in l s l s r v c r p r on l p out typical applications ? drive by wire ? dimming mirror circuit ? filtering/protection on microcontroller i/o lines ? filtering/protection on interface i/o lines ? power line conditioning ? power regulation ? lcd dashboard driver where designers are concerned with both tran- sient voltage protection and emi attenuation, either due to the electrical performance of their circuits or due to required compliance to specif- ic emc regulations, the transfeed product is an ideal choice. general characteristics ? operting teperature: -55c to +125c ? working voltage: 5.6vdc - 26vdc ? case size: 0805 ? energy rating: 0.05 - 0.3j ? current: 20 - 120a ? max feedthru current: 0.5 - 1a features ? bi-directional tvs ? narrow band, high attenuation filter ? emi filtering over broader frequency range ? fastest response time to esd strikes ? aec-q 200 qualified
91 080216 transfeed electrical specifications transfeed automotive series avx multilayer ceramic transient voltage suppressors tvs protection and emi attenuation in a single chip avx working working breakdown clamping maximum transient peak typical dc maximum jump part number voltage voltage voltage voltage leakage energy current cap resistance feedthru start (dc) (ac) current rating rating current voltage v2af105a150y2e _ _ 5.6 4.0 8.520% 18 35 0.10 30 800 0.200 0.75 C v2af105c150y1f _ _ 5.6 4.0 8.520% 18 35 0.30 120 2500 0.150 1.00 C v2af109a200y2e _ _ 9.0 6.4 12.715% 22 25 0.10 30 575 0.200 0.75 C v2af109c200y1f _ _ 9.0 6.4 12.715% 22 25 0.30 120 1800 0.150 1.00 C v2af114a300y2e _ _ 14.0 10.0 18.512% 32 15 0.10 30 300 0.200 0.75 27.5 v2af114c300y1f _ _ 14.0 10.0 18.512% 32 15 0.30 120 900 0.150 1.00 27.5 v2af118a400y2e _ _ 18.0 13.0 25.510% 42 10 0.10 30 200 0.200 0.75 27.5 v2af118c400y1f _ _ 18.0 13.0 25.510% 42 10 0.30 120 500 0.150 1.00 27.5 v2af118x500y3d _ _ 18.0 13.0 25.510% 50 10 0.05 20 75 0.250 0.50 27.5 v2af126c600y2e_ _ 26.0 18.0 34.510% 60 10 0.3 80 250 0.2 0.75 27.5 termination finish code packaging code v w (dc) dc working voltage (v) v w (ac) ac working voltage (v) v b typical breakdown voltage (v @ 1ma dc ) v b to l v b tolerance is from typical value v c clamping voltage (v @ 1a 8x20s ) i l maximum leakage current at the working voltage (a) e t transient energy rating (j, 10x1000s) i p peak current rating (a, 8x20s) cap typical capacitance (pf) @ 1mhz and 0.5 v dcr dc resistance (ohms) i ft maximum feedthru current (a) v jump jump start voltage (v, 5 min) y capaci tance tolerance y = +100/-50% 2 dc resistance 1 = 0.150 ohms 2 = 0.200 ohms 3 = 0.250 ohms e feedthru current d = 500 ma e = 750 ma f = 1.0 amp d packaging code pcs./reel d = 1,000 r = 4,000 t = 10,000 v varistor 2 chip size 2 = 0805 af automotive feedthru capacitor 1 no. of elements 05 voltage 05 = 5.6vdc 09 = 9.0vdc 14 = 14.0vdc 18 = 18.0vdc 26 = 26.0vdc a energy rating x = 0.05j a = 0.1j c = 0.3j 150 varistor clamping voltage 150 = 18v 200 = 22v 300 = 32v 400 = 42v 500 = 50v 600 = 60v p termination finish p = ni/sn (plated) how to order
92 080216 transfeed automotive series avx multilayer ceramic transient voltage suppressors tvs protection and emi attenuation in a single chip bw t s x l c l ew w bl t p input output l c p s w dimensions mm (inches) lwtbw bl ewx s 0805 2.01 0.20 1.25 0.20 1.143 max. 0.46 0.10 0.18 + 0.25 -0.08 0.25 0.13 1.02 0.10 0.23 0.05 (0.079 0.008) (0.049 0.008) (0.045 max.) (0.018 0.004) (0.007 + 0.010 -0.003) (0.010 0.005) (0.040 0.004) (0.009 0.002) recommended solder pad layout (typical dimensions) mm (inches) tpswlc 0805 3.45 (0.136) 0.51 (0.020) 0.76 (0.030) 1.27 (0.050) 1.02 (0.040) 0.46 (0.018) 4 pad layout
93 080216 discrete mlv model where: r v = voltage variable resistance (per vi curve) r p 10 12 c = defined by voltage rating and energy level r on = turn on resistance l p = parallel body inductance discrete mlvf model where: r v = voltage variable resistance (per vi curve) r p = body ir c = defined by voltage rating and energy level r on = turn on resistance l p = minimized parallel body inductance l s = series body inductance l s l s r v c r p r on l p to device requiring protection solder pad solder pad solder pad pcb trace to device requiring protection r v c r p r on l p solder pad transfeed automotive series avx multilayer ceramic transient voltage suppressors tvs protection and emi attenuation in a single chip performance characteristics avx multilayer feedthru varistors (mlvf) are an ideal choice for system designers with transient strike and broadband emi/rfi concerns. feedthru varistors utilize a zno varistor material and the electrode pattern of a feedthru capacitor. this combination allows the package advantage of the feedthru and material advantages of the zno dielectric to be optimized. zno mlv feedthrus exhibit electrical and physical advantages over standard zno mlvs. among them are: 1. faster turn on time 2. broadband emi attenuation 3. small size (relative to discrete mlv and emi filter schemes) the electrical model for a zno mlv and a zno feedthru mlv are shown below. the key difference in the model for the feedthru is a transformation in parallel to series induc- tance. the added series inductance helps lower the injected transient peak current (by 2fl) resulting in an additional ben- efit of a lower clamping voltage. the lowered parallel induc- tance decreases the turn on time for the varistor to <250ps. feedthru varistors
94 080216 transfeed automotive series avx multilayer ceramic transient voltage suppressors tvs protection and emi attenuation in a single chip performance characteristics applications ? emi suppression ? broadband i/o filtering ? vcc line conditioning features ? small size ? low esr ? ultra-fast response time ? broad s21 characteristics market segments ? computers ? automotive ? power supplies ? multimedia add-on cards ? bar code scanners ? remote terminals ? medical instrumentation ? test equipment ? transceivers ? cellular phones / pagers a comparison table showing typical element parameters and resulting performance features for mlv and mlvf is shown above. mlvf parameter mlv 0805 0805 5ph l s typical n/a <600nh l p typical <1.5nh <0.025 r on typical <0.1 100pf to 2.5nf c typical 100pf to 5.5nf see vi curves r v typical see vi curves >0.25 x 10 12 r p typical >1 x 10 12 <250ps typical turn on time <500ps typical frequency response typical circuits requiring transient voltage protection and emi filtering the following applications and schematic diagrams show where transfeed tvs/ emi filtering devices might be used: ? system board level interfaces: (fig. 1) digital to rf analog to digital digital to analog ? voltage regulation (fig. 2) ? power conversion circuits (fig. 3) ? gaas fet protection (fig. 4) regulator + power management chip asic interface card main power +3.3v +5v +12v +3.3v +1.8v input output fig. 2 C voltage regulators fig. 3 C power conversion circuits/power switching circuits fig. 4 C gaas fet protection throttle drive throttle ecu accelerator sensor sensor fig. 5 C automotive transfeed - throttle by wire digital board digital board rf board sensor/keyboard/ touchscreen input by x bus analog board analog board sensor input display digital board keyboard fig. 1 C system interface specification comparison
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