7500 plastic switchmode pulse width modulation control circuit 7500 is a fixed frequency, pulse width modu lation control circuit designed primarily switchmode power supply control. ordering information n suffix plastic 1 16 ? complete pulse width modulation control circuitry ? on? chip oscillator with master or slave operation ? on? chip error amplifiers ? on? chip 5.0 v reference ? adjustable deadtime control ? uncommitted output transistors rated to 500 ma source or sink ? output control for push? pull or single? ended operation ? undervoltage lockout 7500 chip t a = - 20 to +85 c logic diagram 1 noninv. input pin assignment inv. input feedback dead time control c t r t gnd collector 1 vcc 1 2 3 5 6 7 89 10 11 12 14 15 16 7500 noninv. input inv. input ref. output output control collector 2 emitter 2 emitter 1 pin 7 = gnd pin 12 = v cc 56 13 8 9 11 10 15 3 7 12 14 16 2 1 4 dead time control error amp 1 error amp 2 pwm comparator p ulce steering flip flop output control reference regulator oscillator t & beijing estek electronics co.,ltd ET-KA7500 ka ka the ka ka for
2 maximum and recommended operating conditions recommended operating conditions maximum ratings symbol parameter min max min max unit v cc supply voltage 7 40 41 v v i amplifier input voltage -0.3 v cc -2 v cc +0.3 v v o collector output voltage 40 41 v i oc collector output current (each transistor) 200 250 ma t storage temperature range -65 150 c t operating free-air temperature range -20 85 c electrical characteristics (t a = -20 ?+85 c, f =10khz) value symbol parameter test conditions min max tempe- rature, c unit v ref output voltage i 0 =1.0ma v cc =15v 4.75 5.25 -20?+85 v u regin input regulation v cc =7? 40v i 0 =1.0ma - 25 25 mv u regout output regulation i 0 =1? 10 ma v cc =15v - 15 25 mv v ref output voltage change with temperature i 0 =1ma v cc =15v - 1.0 % i sc short circuit output current v ref =0 tsc< 1s v cc =15 v - 50 ma f osc frequency c=0.01 f, r=12k v cc =15v v (03) =0.7v 6.0 14 khz f osc standard deviation of frequency * v cc =15v v (03) =0.7v - 15 -20?+85 % f osc( v) frequency change with voltage v cc =7?40 v v (03) =0.7v - 10 25 % f osc( ) frequency change with temperature c=0.01 f, r t =12k v cc =15v v (03) =0.7v - 2.0 % i ib(2t) input bias current (pin 4) v i =0?5.25v v cc =15v v (03) =0.7v - -10 a dcmax maximum duty cycle (each output) v i(04) =0v v cc =15v v (03) =0.7v 45 - % v thd1 input threshold voltage (pin 4) (zero duty cycle) dcmax=0 v cc =15v v (03) =0.7v - 3,3 -20?+85 v beijing estek electronics co.,ltd ET-KA7500
ET-KA7500 3 v thd2 input threshold voltage (pin 4) (maximum duty cycle) dcmax v cc =15v v (03) =0.7v 0 - v . value symbol parameter test conditions min max tempe- rature, c unit t rc output voltage rise time (common- emitter) v cc =15v v (03) =2.0v - 200 ns t fc output voltage fall time (common- emitter) v cc =15v v (03) =2.0v - 100 ns t rf output voltage rise time (emitter- follower) v cc =v c =15v v (03) =2.0v - 200 -20?+85 ns t ff output voltage fall time (emitter- follower) v cc =v c =15v v (03) =2.0v - 100 ns v thp input threshold voltage (pin 3) dcmax=0 v cc =15v - 4.5 v i i input sink current (pin 3) v cc =15v v (03) =0.7v 0.3 - ma v io input offset voltage v cc =15v v o(03) =2.5v - 10 mv i io input offset current v cc =15v v o(03) =2.5v - 250 na i ib input bias current v cc =15v v o(03) =2.5v - 1 a v icrl low input common mode voltage range v cc =7?40v -0.3 - v v icrh high input common mode voltage range v cc =7?40v v cc -2 - v a vol open loop voltage amplification v 0 =3v v cc =15v v o =0.5?3.5v 70 - db f b unity-gain bandwidth v cc =15v 100 - -20?+85 khz cmrr common mode rejection ratio vcc=40v 65 - 25 db i ol output sink current (pin 3) v cc =15v v 0(03) =0.7v 0.3 - ma i oh output source current (pin 3) v cc =15v v 0(03) =3.5v -2.0 ma i c(off) collector off-state current v ce =v cc =40v - 100 -20?+85 a beijing estek electronics co.,ltd
i e(off) emitter off-state current v cc =v c =40v v e =0v - -100 a v sat(c) collector - emitter saturation voltage (common-emitter) v cc =15v v e =0v v 0(03) =3.0v i c =200ma - 1.3 v 2.5 25 v sat(e) collector - emitter saturation voltage (emitter-follower) v cc =v c =15v i e = - - - 200ma v 0(03) =3.0v - 2.9 -20?+85 v i och output control input current v cc =15v v 0(03) =0.7v - 3.5 ma i cc15 standby supply current at v cc 15v v cc =15v - 10 25 ma . value symbol parameter test conditions min max tempe- rature, c unit i cc40 standby supply current at v cc 40v v c =40v - 15 25 ma i cca average supply current v cc =15v v 0(03) =0.7v v 0(04) =2.0v - 17 -20?+85 ma standard deviation is a measure of the statistical dist ribution about the mean as derived from the formula 1n )xxn( n 1n 2 ? ? = = 4 beijing estek electronics co.,ltd et- ka7500
|
