U267BG TFUNK | Alldatasheet

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| TELEFUNKEN ELECTRONIC 61C D MM 892009 0004025 3 MMALGG >. A U 237 BG -U 247 BG : TIBLEPURIEN electronic U 257 BG - U 267 BG 7~ een T-52-/3:07,. Monolithic integrated Circuits Application: To drive LED-displays with 5 or 10 diodes Features: . @ Wide supply voltage range © Eligible botween: ladvsion with

5 LED's line with linear scale division w

@ High LED current U 237 BG or U 247 BG @ Low power dissipation due to serles 5 LED's line with logarithmic scale division with connection of LED's U257 BG or U 267 BG : @ Different colour LED's can be connected 10 LED’s line with linear scale division with . arbitrary 7 U27BGandU27BG ‘ , i 40 LED's line with logarithmicscale division wit! ve @ No peripheral components are necessary U 257 BG end 267 BG @ High input resistance ; “ow ow ow ow | ) Ts | © 8. o> h o E Vs am 6 | os d DN AX A A A - ‘ + = [Tatiatis« Tis] ls 1. cm = = — = = 4 7 } asasare 4 Fig.1 Block dlagram LED scale IC | rf | 71.2/1310,0386 E1 i sos hey . 3 | 0364 E-09 g 227 { | co,

TELEFUNKEN ELECTRONIC 61C D M@@ 492005 OOO402b 5 MMALGG U 237 BG: U 247 BG . (7-52-13 .07 U 257 BG - U 267 BG me ~ Absolute maximum ratings . . Supply voltage Vs 25 v Input voltage Mv 5 oooy Input current 4 06 mA Output current, maximum hous 30 mA Output reverse voltage Vo Vs Power dissipation . | Tans = 60°C Pet 690 mw 4 . : Ambient temperature range 4 a Vs = 18V Tomb 10,485 c 4 ' Storage temperature range Teo 15.4125 ey 4 Junction temperatura Tj 160 °c : 4 ‘Thermal resistance Min, Typ. Max. i Junction ambient Poa : 130 «KW 5 i Optical and electrical characteristics ! Vs = 16V, Tan = 25°C, Reference point: Ground 4 Total current (incl, LED current) & 25 mA } ‘Supply voltage Vs 12 26 Vv ‘ Step tolerance Ay £30 mv 4 . Switching threshold hysteresis AV 10 mv a ' Input current -h 1 uA i . Output saturation voltage . A fous = 20mA. Vor.set "a v j | Output current ahs 20 mA j i 0365 ~——-E“10 i FA 22g ES | i

TELEFUNKEN ELECTRONIC 61C D MM@ 892005 0004027 7 MEALGG U 257 BG - U 267 BG | : SS Circult description ; (T-5a 13 707 ‘The IC's aro driving circuits for a § or 10 LED bar display having an integrated current generator whose current is adjusted to 20 mA. Light emitting diodes are connected In series in order to reduce power: dissipation and to have the same current flow to the supply in every operating condition, Fig. 2 For red LED's (i.e. TLSR 5100) the supply voltage is 12 V whereas in case of green or yellow diodes (Le. TLSY 5100, TLSG 5100) the voltage is 16 V. | The Input thresholds are: : ~ U237BG: 0.2V, 04V, 06V, 08V, 10V - U247BG: 0.1V, 0.3V, 05V, 0.7V, 09V ' so Havoltage greater than the first threshold but less than the second threshold is applied one LED is lighted, ; if the input voltage is between the second and the third threshold, then two LED's are in operation and i soon. ; Fig. 2 shows the ciroult diagram of a bar display with 6 LED's. 7 . By choosing a parallel connection of the inputs of an U 237 BG and an U 247 BG it is possible to get a ‘i By choosing a parallel connection of the inputs of an U 257 BG and an U 267 BG it is possible to get a i 10 LED bar display with thresholds: -20 dB, -15 dB, -10 dB...+6 dB, i | Fig.3 shows the circuit diagram of a bar display with 10 LED's, | . | . j o%s oY 85 22046 3 | Applications: =I9=20 mA i i? | js} fs] i : U 237BG,U247BG, i : U 257BG, U267BG ; c | | : | 4 Wu WY 4 j Fig.2 Bar display with § LED's : i

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TELEFUNKEN ELECTRONIC alc D m™ 8920096 0004028 9 MMALGG U 237 BG -U 247 BG =e ey (TT: - - Som U 257 BG -U 267 BG (T-5A-13-07 , her i =" a es | . Pf) fl fl |v oMueomo e e i Tae | 3 Ogogogo wr, | mi a a mh P10 Fig.3. Bar display with 10 LED's A estes . q . C acoer 3 Yart8V _s7an huang bucket sensor sro ona | ras Ar -Angtten { Ly [ | Pe] fe) Pm ff | ° . j eae TeeS wn 9100 ZF WZ, aesuce 0 00 Fan? oa0-200¥ 0087-2000 missine J woortiv soatosv sostasy aontosv 20xto.2V | Fig.4 Liquid level display with linear Fig.5 Logarithmic AF recording level display 4 . resistance pickup with 5LED's ] 230 - 0367 €-12 gee q ' meee ne tee cnneee fe mg net 8 ae meinen oe snemnegeermnenantat teenie mpage a . |

TELEFUNKEN ELECTRONIC 61¢C D m@ 8920056 0004029 0 MBALGG U237BG-U247BG 3 oo : U 257 BG - U 267 BG | , \\T5a-13-31 | 0.68 pF stk Sika 11kOQ = IN414B AF-Amplifier . “hg a a | re | %e | 2008 P, a ee - f | mom 4 ao Te , S | e e LT ET Gy ey a Tee xY 2 ‘ od +948 RY . 4 an Fig.6 Logarithmic AF recording level display with 10 LED's é| | 4

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) tae “TELEFUNKEN ELECTRONIC 82 D_ MM 8920096 OOODN030 7 MMALGG U 237 BG -U 247 BG 'T-5a-13-0 Lom. U 257 BG -U 267 BG en 7 fe] fr] fel fs] °2 Lf fe 2 e S OsOg080 % Ogog080 is a ; me WOKN ectore toxn| °8 oo, hte . Hl []10 ka RS | P10 nN 20 kof] § =e | J mIp= 20 mA — Ha 20 kal] ; , Plier |? S| a - i : LTCITI GI jo: Ogoghgo) Fs | ‘ : - Pe: ed | q pzx 557 i esvt . j soo al} Ty BONEE — |Oag | ae reve j Fig.7 Driverfor20LED's 1 : 22 0369 E14 ae

tT ELEFUNKEN ELECTRONIC 81C > M@ 8920096 OO04032 4 MMALGG U 237 BG -U 247 BG i U 257 BG- U 267 BG i ~ Dimensions in mm (T- Sa-13 o1 | Plastic case 4 Welght max. 1g i | | o 0370-01 a ,