features: 4707 dey road liverpool, n.y. 13088 (315) 701-6751 m.s.kennedy corp. series 121 dual high power bridge amplifier the msk 121(b) is a low cost monolithlic dual bridge amplifier capable of delivering 60 watts per package and is available in many preset gain configurations. internal rc snubber networks ensure stable operation and an internal current limit of 4 amps improves product reliability under abnormal loading conditions. the msk 121 series can be powered from a split supply of 2.5v to 20v or single ended from 5v to 40v. a minimum of 3 amps of load current is available and the highly efficient driver section allows the output to swing to within 2.2 volts of the power supply rail when delivering 2.5 amps of load current. the msk 121 series is packaged in a hermetically sealed 8-pin to-3 packae that can be attached directly to a heat sink for maximum thermal efficiency. consult factory for alternate package configurations. description: ultra low cost/minimal external components required complete bridge/dual phase output configuration up to 60 watts internal rc output snubber networks for ultra-stable operation single or dual supply operation 5v to 40v total internal power supply decoupling capacitor provided internal output current limit 4a typical gain bw product 600khz typical iso 9001 certified by dscc mil-prf-38534 qualified typical applications bridge audio amplifier bi-directional motor driver dual precision power regulator dual solenoid controller pin-out information 8 7 6 5 -vcc n/c n/c output 1 1 2 3 4 vref input +vcc output 2 equivalent schematic rev. c 7/00 1
group a subgroup - 1 1 2,3 1 2,3 - - 4 4 4 - 4 4 4 4 4 - - - - - total - both amplifiers v in = 0v v in =0v v in =0v v cc =10v to 15v r l =1k w ; f=10khz r l =10 w ; f=10khz f=10khz r l =10 w ; v out =10v pp v out =10v MSK121-1 MSK121-2 MSK121-5 MSK121-10 one amplifier, dc output one amplifier, ac output f > 60hz both amplifiers, dc output both amplifiers, ac output f > 60hz no heat sink test storage temperature range lead temperature range (soldering 10 seconds) case operating temperature MSK121 MSK121b junction temperature absolute maximum ratings v cc i out v ind v inc total supply voltage peak output current differential input voltage common mode range -65c to +150c 300c -40c to +85c -55c to +125c +175c t st t ld t c t j msk 121b msk 121 parameter test conditions electrical specifications 1 units min. 2.5 - - - - - - 60 14 13 2.5 - 0.5 0.9 1.8 4.8 9.3 - - - - - typ. 15 35 1.5 15 30 75 10 80 14.2 13.7 3.5 40 1.5 1.0 2.0 9.0 10.0 5.0 3.7 3.4 2.4 30 max. 20 90 10 75 1500 - - - - - - - - 1.1 2.2 5.4 10.7 - - - - - min. 2.5 - - - - - - 60 14 13 3 - 0.5 0.95 1.9 4.75 9.5 - - - - - 1 2 3 4 5 6 notes: 4 4 4 4 4 max. 20 60 5 50 500 1000 - - - - - - - 1.05 2.1 5.25 10.5 - - - - - typ. 15 35 0.5 10 30 75 10 80 14.2 13.7 4 40 1.5 1.0 2.0 5.0 10.0 5.0 3.7 3.4 2.4 30 30 30 30 30 30 40v soa vcc vcc-0.5v v ma (mv)(av) m v/c na na pf db v v a khz v/ m s v/v v/v v/v v/v c/w c/w c/w c/w c/w vcc=15 v, vref=0v=gnd, rl=1k w unless otherwise specified. parameter is guaranteed by design but not tested. typical specifications are representative of actual device performance at 25c but are for reference only. military grade devices ('b' suffix) shall be 100% tested to subgroups 1,2,3 and 4. subgroup 5 and 6 testing available upon request. subgroup 1,4 t a =t c =+25c subgroup 2,5 t a =t c =+125c subgroup 3,6 t a =t c =-55c static supply voltge range 2 quiescent current input output offset voltage output offset voltage drift 2 input bias current 2 input capacitance 2 power supply rejection ratio 2 output output voltage swing output peak current power bandwidth 3 transfer characteristics slew rate 2 voltage gain thermal resistance q jc (junction to case) q jc q jc q jc q jc (juction to ambient) rev. c 7/00 2
application notes power supply connections the msk 121 maximum supply voltage is specified as 20v. however, single sided or unbalanced power supply operation is permisible as long as the total power supply voltage does not exceed 40v. caution should be exercised when routing high current printed circuit paths. generally, these paths should not be placed near low level, high impedance input circuitry to avoid oscillations. during initial evaluation, power supply current limiting is strongly advised to avoid damaging the device. the msk 121 has an internal 0.1 m f capacitor for high frequency decoupling. however, both the negative and positive power supplies must also be effectively decoupled with a low fre- quency bypass capacitor to avoid power supply induced os- cillation. an effective decoupling scheme consists of 10 m f of capacitance for every 1 amp of output current from each power supply pin to ground. the capacitors will eliminate any peak output voltage clipping which may occur due to poor power supply load regulation. power supply decoupling capacitors should be placed as close to the package power supply pins as possible (pins 3 and 8). current limit the current limit circuitry is internal to the device. the typi- cal value is shown in the parameter table. for protection against high energy flyback conditions (inductive loads), fast recovery reverse biased diodes should be connected from each output to the power supplies. (see figure 1.) safe operating area the safe operating area curve is a graphical representation of the power handling capability of the amplifier under vari- ous conditions. the wire bond current carrying capability, transistor junction temperature and secondary breakdown limi- tations are all incorporated into the safe operation area curves. all applications should be checked against the s.o.a. curves to ensure high m.t.b.f. vref pin connections in the vref pin is brought out to allow the user to bias the outputs at a predetermined dc level. when the input signal is ac coupled the output of each amplifier will be at the same dc level as the vref pin. this feature is very usefull when using a single supply voltage. the user can simply connect a resistor voltage divider to vref to bias the output at one half of the supply voltage by using 2 equal value resistors from +vcc to -vcc (gnd). gain configurations the msk 121 is available with preset gains of 1, 2, 5 and 10v/v. refer to figure 1 for typical values of the inter- nal components. stability considerations the msk 121 has an internal rc snubber network on each output for excellent stability for most applications. good lay- out practices should be used, however, when designing the printed circuit board. typical application circuit p/n MSK121-1 MSK121-2 MSK121-5 MSK121-10 r 50k w 25k w 10k w 10k w a v 1 2 5 10 r f 50k w 50k w 50k w 100k w figure 1 z in (v ref =gnd) 33.3k w 18.8k w 8.6k w 9.2k w rev. c 7/00 3
the information contained herein is believed to be accurate at the time of printing. msk reserves the right to make changes to its products or specifications without notice, however, and assumes no liability for the use of its products. mechanical specifications rev. c 7/00 screening level industrial part number ordering information 1 1 2 2 5 5 10 10 all dimensions are 0.010 inches unless otherwise labeled MSK121-1 MSK121b-1 MSK121-2 MSK121b-2 MSK121-5 MSK121b-5 MSK121-10 MSK121b-10 voltage gain* * please consult factory if alternate package or gain is required. m.s. kennedy corp. 4707 dey road, liverpool, new york 13088 phone (315) 701-6751 fax (315) 701-6752 www.mskennedy.com military mil-prf-38534 industrial military mil-prf-38534 industrial military mil-prf-38534 industrial military mil-prf-38534 5
typical performance curves rev. c 7/00 4
|
