dionics, inc. phone: (516) 997 - 7474 65 rushmore street fax: (516) 997 - 7479 westbury, ny 11590 website: www.dionics - usa.com dih - 134 - sm power mosfet dual n/o spst photov oltaic dc relay features: ? package contains two n/o dc relays ? fast switching speeds ? optically isolated to 400v dc . ? immune to false triggering ? hermetic gull - wing surface mount package ? y - level mil - screening available ( dih - 134 - smy ) ? designed to meet mil - r28 750 and 28v dc system surge and spike requirement of mil std - 704. applications: ? replacement of mechanical relays ? motor control & power control ? aircraft flight control systems ? a.t.e (automatic test equipment) ? load control from processor i/o ports ? power sup ply circuits ? medical electronics ? tactical aircraft ? operation temp. ? 40 0 c to 85 0 c @ 200ma load ( above 85 0 c derate load 5ma / 0 c) description: the dih - 134 - sm is a state - of - the - art photovoltaic solid state relay designed for 28v dc aircraft power applicat ions where speed, current overload protection and immunity to transient voltages are critical. the dih - 134 - sm contains current limiting networks and thermally sensitive integrated circuits that disable the output, if the output mosfets approach an unsafe operating temperature. because the thermally sensitive integrated circuits have built - in hysteresis, the output mosfets are automatically restarted when a safe temperature is reached. this auto restart feature eliminates the need for system restart signal s. if the overload condition continues to exist, the cycle is repeated; if the overload condition is removed, the relay returns to normal operation. the gull - wing surface mount package contains two independent n/o relays, with separate led inputs and opt ically isolated power mosfet outputs. each relay, a or b, is capable of carrying 350ma dc continuous current and 500ma dc peak current. each led optically couples to a photovoltaic (pv) ic chip which responds by generating a voltage. this voltage is intern ally connected to the gate and source terminals of the output mosfets, thus controlling their current. the dih - 134 - sm is also available screened to military specifications, as required. package layout: dih - 134 - sm equival ent circuit : 0.445 0.555 0.010 0.015 0.395 sq. max. xxxx DIH-134-SM 0.300 0.050 dionics inc. 02/200 3 rs 100 ohms a - 12; b - 8 enh. thermal sensor npn a - 14; b - 10 a - 3; b - 7 thermal link a - 1; b - 5 led pv 0.005 0.120 max.
dih - 134 - sm: power mosfet dual spst photovoltaic dc relay electrical characteristics: (per relay @ 25 0 c unless otherwise specified) v relay a: normally open (n/o) v relay b: normally open (n/o) v output characteristics symbol parameter typ. max. unit conditions i lo ad load current ? 350 / 500 ma continuous / peak r on on resistance ? 2 w w i in =18 (ma); i load = 100ma @ t a = 85 0 c ? 3 w w i in =18 (ma); i load = 100ma i leak leakage current ? 10 m m a v op =90 (v) r iso input/output resistance 10 8 ? w w v op operating volta ge 28 60 vdc limited by power dissipation bv breakdown voltage ? 95 vdc at 100 m a t on turn - on time 150 300 m m s v in = 4.5v, p.w* = 100 ms; v op = 30v t off turn - off time 20 40 m m s v in = 4.5v, p.w =100 ms; v op = 30v v iso input - output isolation ? 400 v dc p m aximum power dissipation ? 400 mw in free air pw*: pulse width. v timing diagram td(on) vop 10% t(on) td(off) output 90% 90% 10% 10% input 0v t(off) 0v 5v 90% v environmental ratings : storage temperature: - 55 0 c to +125 0 c constant acceleration: 5000g hermeticity: + gross 1x10 - 5 atm cc/sec + fine 5 x 10 - 8 atm cc/s ** ** when screened to mil - specs. v pin designations relay pin number inputs pin number outputs relay 1 a + 14 drain a + a 3 a - 12 source a - relay 5 b + 10 drain b + b 7 b - 8 source b - 2,4,6 nc 9,11,13 nc v input characteristics symbol parameter min. typ. max. unit i in input current 5.0 15.0 24.0 ma v in input voltage drop 1.3 ? 1.5 v v rev. reverse voltage ? ? 10.0 v v on on state voltage 3.5 ? ? v v off off state voltage ? ? 1.5 v
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