dionics, inc. 65 rushmore street westbury, ny 11590 phone: (516) 997 - 7474 fax: (516) 997 - 7479 website: www.dionics - usa.com dih - 134 power mosfet dual n/o spst photovoltaic dc relay features: package contains two n/o dc relays; fast switch ing speeds optically isolated to 400v dc . immune to false triggering small size, hermetic 8 - pin sip package designed to meet mil - r28750 and 28v dc system surge and spike requirement of mil std - 704. y - level mil - screening available ( dih - 134y ) 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 supply circuits medical electronics description: the dih - 134 is a state - of - th e - art photovoltaic solid state relay designed for 28v dc aircraft power applications where speed, current overload protection and immunity to transient voltages are critical. the dih - 134 contains current limiting networks and thermally sensitive integrate d 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 reac hed. this auto restart feature eliminates the need for system restart signals. if the overload condition continues to exist, the cycle is repeated; if the overload condition is removed, the relay returns to normal operation. the package contains two ind ependent n/o relays, with separate led inputs and optically 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 res ponds by generating a voltage. this voltage is internally connected to the gate and source terminals of the output mosfets, thus controlling their current. the dih - 134 is also available screened to military specifications, as required. pin designation s relay a relay b 1 input + 5 input + 2 input - 6 input - 3 output - 7 output - 4 output + 8 output + * dih - 134 equivalent circuit thermal sensor rs npn enh. led pv a - 1 ; b - 5 a - 4 ; b - 8 100 ohms a - 3 ; b - 7 a - 2 ; b - 6 ther mal link * package layout : weight 1.5 grams 0.046 typ . 0.780 max . 0.010 0.270 max. 0.120 max . dionics inc . xxxx 0.100 0.040 dih - 134 0.020 0.300 mi n . 02/2002
dih - 134: 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 input characteristics symbol paramet er 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 v output characteristics symbol param eter typ. max. unit condition i load load current ? 350 / 500 ma continuous / peak r on on resistance ? 3 w w i in =18 (ma); i load = 100ma @ t a = 85 0 c ? 4 w w i in =18 (ma); i load = 100ma i leak leakage current ? 10 m m a v op = 75 (v) r iso input/output resist ance 10 8 ? w w v op operating voltage 28 30.3 vdc limited by power dissipation bv breakdown voltage ? 8 0 vdc at 100 m a t on turn - on time 150 300 m m s v in = 4.5v, p.w* = 100 m s; v op = 30v t off turn - off time 150 300 m m s v in = 4.5v, p.w =100 m s; v op = 30v v iso input - output isolation ? 400 v dc p maximum 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: - 25 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. 02/2002
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