||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||| ceramic heating co ntroller 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 1 pt 8 a 3251 /53 features ? high watt density alumina heaters ? high triggering current and double pulse trigger for scr ? enhanced mhp algorithm for quickly heat ing - up and quickly lost - heat - recover ? uniform heat to maintain constant temperature ? adjustable to fit wide range hea ting plates ? adjustable to different thermal coefficient of resistively ? full compensation and insensitive to environment temperature ? 6 heat temperature settings ? auto power off for pt8a3251 ? over temperature protection ? package: dip - 16 and soic - 16 package description the pt8a3251 /53 is a mix - signal cmos chip designed for ceramic heating control ler . the chip offers 6 different default heat temperature settings including 150 ? c , 170 ? c , 185 ? c , 200 ? c , 215 ? c , 230 ? c . and the temperature range can be adjusted thro ugh external series resistance. the pt8a3251 has an i nternal t imer ; i t timeouts and device will stop heating automatically after 216000 clock period, ie. 1 hour for 60hz and 1.2 hour for 50hz. the pt8a3251/53 also has over temperature protection function . the chip is e nclosed in lead free dip - 16 and soic - 16 . application s ? ceramic heating controller pin configuration l 4 l 2 l 3 ref2 c2 c1 ref1 ptc gate ot l 1 vd d2 vdd1 vb gnd clk 1 2 6 5 4 3 9 8 7 1 1 1 2 1 3 1 4 1 5 pt8a3251 /33 1 6 1 0
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 2 pt 8 a 3251/53 ceramic heating controller pin description pin no. pin n ame i/o pin description 1 l4 i /o adju st lost - heat - recover input and led on/off cathode output . 2 c1 o led scan common d r iver . 3 c2 o led scan common d r iver . 4 ref2 i reference 2 for internal comparator . 5 ref1 i reference 1 for internal comparator . 6 ptc i temperature sensor input . 7 gate o scr trigger output , active high . 8 ot o over heat output , active high. 9 clk i clock input from power line . 10 gnd gnd ground. 11 vb o ptc sampling power source . 12 vdd1 power power. 13 vdd2 power power. 14 l1 i/o on/off key input and led an ode output . 15 l2 i/o down key input and led anode output . 16 l3 i/o up key input and led anode output . block diagram ref select comp comp osc logic control vb pt c ref1 ref2 clk c1 c2 l1 l2 l3 l4 gat e ot
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 3 pt 8 a 3251/53 ceramic heating controller maximum ratings storage temperature ................................ ................................ ................... - 55 o c to +1 50 o c ambient temperature with power applied ................................ ............... - 40 o c to + 85 o c supply voltage t o ground potential ( input & v dd only ) ......................... - 0.5v to +6.5 v supply voltage to ground potential ( output s only ) ................................ - 0.5v to +6.5 v dc input voltage ................................ ................................ ............................. - 0 .5v to + 6.5 v input/ output current ................................ ................................ ... 5 0ma input/ output current (pin vdd2, vb only) ............................. 200 ma power dissipation ................................ ................................ ................................ ......... 5 00mw recomme nded operation conditions sym parameter pin min typ max unit vdd operating voltage vdd 1, vdd2 4. 0 5.0 5.5 v t a operating temperature - - 20 - 85 c dc input electrical characteristics sym description test conditions min type max unit i ih input hi gh current pin: ptc , clk v in = v dd - - 5 ? a pin: l1, l2, l3, l4 v in = v dd (l1, l2, l3, l4 is of input) - - 5 i il input low current pin: ptc, clk v in = gnd - - - 5 ? a pin: l4 v in = gnd ( l 4 is of input) - - - 5 pin: l1, l2, l3 v dd =5.0v v in = 2 .0v ( l 1, l2, l3 is of input) - 0.1 6 - 0.20 - 0.2 4 ma v i h input high voltage pin: l1, l2, l3 - 0.8 v dd - - v v il input low voltage pin: l1, l2, l3 - - - 0.4 v dd v v it input threshold voltage vt1_level l 4 2.8 3.3 3.8 v vt2_level 1.1 1.6 2.1 v note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other condi - tions above those indicated in th e operational sec - tions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 4 pt 8 a 3251/53 ceramic heating controller dc output electrical characteristics sym description test conditions min type max unit i oh output high current pin: gate v dd = 5.0v vout = 4.5v - 3 .0 - - ma pin: ot v dd = 5.0v vout = 4.5v - 3 .0 - - pin: l1, l2, l3 v dd = 5.0v vout = 2.2v - 0.8 - 1 - 1.2 pin:c1 v dd = 5.0v vout = 4.5v - 3.0 - - pin:l4 v dd = 5.0v vout = 4.5v - 3.0 - - i ol output low current pin: gate v dd = 5.0v vout =0.5v 4.0 - - ma pin: ot v dd = 5.0v vout =0.5v 4.0 - - pin: c1, c2 v dd = 5.0v vout =0.5v 4.0 - - pin: l4 v dd = 5.0v vout =2.8v 0.8 1 1.2 power supply characteristics sym description test conditions min type max unit v por voltage of por - 1.5 - 2.5 v i dd current consumption n o loading , v dd = 5.0v - - 400 ? a v dd supply voltage control function normal 3.5 - 5.5 v tpo off power off timer f clk = 50hz 1.15 1.2 1.25 hour
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 5 pt 8 a 3251/53 ceramic heating controller temperature control characteristics sym description test conditions type unit vt 150 threshold voltage level (150c) vdd2=5.0v vref2=0.7v vref1= 0~100%(vb - vref2) test gate output about 50% heating power 0.482 vb - v ref2 v vt 170 threshold voltage level (170c) 0.494 vb - v ref2 vt 185 threshold voltage level (185c) 0.503 vb - v ref2 vt 200 threshold voltage level (200c) 0.512 vb - v ref2 vt 215 threshol d voltage level (215c) 0.520 vb - v ref2 vt 230 threshold voltage level (230c) 0.529 vb - v ref2 vot 280 voltage level of resistor net (280c) vdd2=5.0v vref2=0.7v vref1=0~100%(vb - vref2) when increase vptc, test ot is just from l to h 0.554 vb - v ref2 vt 150h heat - up threshold voltage level (150c) vdd2=5.0v vref2=0.7v vref1=100%(vb - vref2) test gate output about 50% heating power vt 150 +1.9%(vb - v ref2 ) v vt 170h heat - up threshold voltage level (170c) vt 170 +1.7%(vb - v ref2 ) vt 185h heat - up threshold vol tage level (185c) vt 1850 +1.6%(vb - v ref2 ) vt 200h heat - up threshold voltage level (200c) vt 200 +1.5%(vb - v ref2 ) vt 215h heat - up threshold voltage level (215c) vt 215 +1.4%(vb - v ref2 ) vt 230h heat - up threshold voltage level (230c) vt 230 +1.3%(vb - v ref2 )
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 6 pt 8 a 3251/53 ceramic heating controller functional description ? 3 input button s on/off: this button will toggle heating - on or heating - off. once heating - on , the level 4 of 200 ? c temperature setting always be selected. up: temperature up adjustment button. push up - button once , the temperature setting increase s one level until the highest level 6. then after, level 6 will be kept. down: temperature down adjust ment button . push down - button on ce , the temperature setting reduce s one level until the lowest level 1 . then after, level 1 wi ll be kept. ? 7 led indicator led1: heating - on or heating - off led2: 150 ? c temperature setting (level 1) led3: 170 ? c temperature setting (level 2) led4: 185 ? c temperature setting (level 3) led5: 200 ? c temperature setting (level 4) led6: 215 ? c temperature set ting (level 5) led7: 230 ? c temperature setting (level 6) note: the temperature range can be adjusted by external series resistance. ? reset after power on the chip will be reset by por circuit, led1~ led7 are all disabled. gate and ot pin output are low leve l. ? timer (only for pt8a3251) once ic enter s heating - on state, internal timer start s to count. it timeouts and device will stop heating automatically after 216000 clock period , ie. 1 hour for 60hz and 1.2 hour for 50hz. ? over - heat protection once heater lo se s control and reach es to 280 ? c, the over - heat protection function will be activated by driving one scr to melt the fuse immediately . application circuit
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 7 pt 8 a 3251/53 ceramic heating controller mechanical information pe ( dip - 16 ) symbol min max a 3.71 4.31 a1 0.51 a2 3.20 3.60 b 0.38 0.57 b1 c 0.20 0.36 d 18.80 19.20 e 6.20 6.60 e1 7.32 7.92 e l 3.00 3.60 e2 8.40 9.00 pkg. dimensions(mm) 1.52 bsc 2.54 bsc note: 1) controlling dimensions in millimeters. 2) ref : jedec ms - 001d/bb
|||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||| 12 - 07 - 0006 pt0 2 24 - 1 07/0 6 /12 8 pt 8 a 3251/53 ceramic heating controller we (soic - 1 6 ) ordering information ordering no. package code package pt8a3251pe p lead free dip - 1 6 pt8a3251we w lead free soic - 1 6 pt8a325 3 pe p lead free dip - 1 6 pt8a325 3 we w lead free soic - 1 6 note: ? e = pb - free ? adding x suffix = tape /r eel pericom semicondu ctor corporation ? 1 - 800 - 435 - 2336 ? www.pericom.com pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in pericom product. the company makes no representations that circuitry described herein is free from patent infringemen t or other rights, of pericom . symbol min max a 1.35 1.75 a1 0.10 0.25 a2 1.35 1.55 b 0.33 0.51 c 0.17 0.25 d 9.80 10.20 e 3.80 4.00 e1 5.80 6.20 e l 0.40 1.27 0 8 pkg. dimensions(mm) 1.27 bsc note: 1 ) controlling dimensions in millimeters. 2 ) ref : jedec ms - 012 e/ac
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