microsemi carlsbad division 5973 aveniva encinas, suite 101, carlsbad 92008, fax (760) 431-0541 1 copyright ? 2001 rev. 0.2b, 2002-06-17 www. microsemi . com LX1802 "plug" for med427 a -1 target datasheet carlsbad division block diagram block diagram block diagram block diagram simplified block diagram package order info package order info package order info package order info t j ( c) package number 10 to 55 LX1802 description description description description the msc-LX1802 is the ic2 "plug" for the med427a-1 module. the "plug" chip has peak rectifier, level shifter, and switch. this full wave peak rectifier converts the peak to peak ac input waveform to a dc level. the charge builds up on both terminals of the storage capacitor to step up the dc level during a full wave input signal. the charge dissipates via a resistor when the ac input signal stops. the level shifter is a source follower transistor with a resistive load. the input connects to the peak rectifier output and the output connects to igbt_g. if the input voltage is below threshold, the output (igbt_g) equals igbt_e voltage. if the input voltage exceeds the threshold voltage of the transistor, the output steps up to the bootstrap voltage vhi+igbt_e at the igbt_g output. the switch supplements the discharge of the capacitor in the peak rectifier when the ac input signal stops. the switch remains open when there is an ac signal since a virtual ground forms at its input and prevents a channel from forming in the active device. the opposite occurs when the ac signal stops and the input builds a potential greater than a threshold voltage. important: for the most current data, consult microsemi ?s website: http://www.microsemi.com key key key key features features features features ? low peak current consumption: <2ma ? small form factor 0.889 mm 2 ? solder bumped die applications applications applications applications ? implantable cardio defib l l x x 1 1 8 8 0 0 2 2 in igbt_g peak rect igbt_e level shifter clamp switch vhi
microsemi carlsbad division 5973 aveniva encinas, suite 101, carlsbad 92008, fax (760) 431-0541 2 copyright ? 2001 rev. 0.2b, 2002-06-17 www. microsemi . com LX1802 "plug" for med427 a -1 target datasheet carlsbad division absolute maximum rat absolute maximum rat absolute maximum rat absolute maximum ratings ings ings ings voltage potential......................................................................................... 0.0v to +20.0v esd voltage................................................................................................................. 2kv storage temperature range(t stor )................................................................10c to 55c storage humidity...............................................................................................10% to 90% note: exceeding these ratings could cause damage to the device. all voltages are with respect to ground. currents are positive into, negative out of specified terminal. package pin out package pin out package pin out package pin out (bottom view) functional pin descr functional pin descr functional pin descr functional pin description iption iption iption p in n ame p in n o 16 pin dip d escription igbt_g 5 connects to igbt gate igbt_e 6 connects to igbt emitter in 11 input ac signal vddhi 13 high voltage supply external components external components external components external components symbol value tolerance function p p a a c c k k a a g g e e d d a a t t a a 11 6 13 4 5
microsemi carlsbad division 5973 aveniva encinas, suite 101, carlsbad 92008, fax (760) 431-0541 3 copyright ? 2001 rev. 0.2b, 2002-06-17 www. microsemi . com LX1802 "plug" for med427 a -1 target datasheet carlsbad division operating conditions operating conditions operating conditions operating conditions parameter symbol min typ max unit voltage potential vp 15 16 18 volt input frequency f 5 7.5 10 mhz operating temp t amb 31 37 43 c electrical character electrical character electrical character electrical characteristics istics istics istics unless otherwise specified, the following specifications apply over the operating ambient temperature t a =37c except where otherwise noted. test conditions: vhi=16v, igbt_e=800v, fin=10mhz, igbt_g load=3nf. lx1801 parameter symbol test conditions min typ max units voltage drop limit for igbt_g v drop -5mhz 0-6v 50% @ pin in - v drop =18v-igbt_g(pk) 1 v rise time for igbt_g t rise,g -5mhz 0-6v 50% @ pin in -10%-90%*igbt_g(pk) 5 us fall time for igbt_g t fall,g -90%-10%*igbt_g(pk) 5 us enable time for igbt_g t en,g -measure enable of 5mhz 0-18v 50% @ pin in to igbt_g=90%*igbt_g(pk) 5 us disable time for igbt_g t dis,g -measure disable of 5mhz 0-18v 50% @ pin in to igbt_g=10%*igbt_g(pk) 5 us e e l l e e c c t t r r i i c c a a l l s s
microsemi carlsbad division 5973 aveniva encinas, suite 101, carlsbad 92008, fax (760) 431-0541 4 copyright ? 2001 rev. 0.2b, 2002-06-17 www. microsemi . com LX1802 "plug" for med427 a -1 target datasheet carlsbad division mechanicals mechanicals mechanicals mechanicals 4-pin bare die pad locations are (xmin, ymin) and are in um note: 1. dimensions do not include mold flash or protrusions; these shall not exceed 0.155mm(.006?) on any side. lead dimension shall not include solder coverage. m illimeters i nches dim min max min max x 1.40 0.055 y 0.635 0.025 (0,0) (22, 406) (930, 400) (1208, 400) m m e e c c h h a a n n i i c c a a l l s s (19, 20) (1204, 22)
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