TCA280B

TCA280B PHILIPS | Alldatasheet

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ORDERING AND PACKAGE INFORMATION

1 Adustabie Broportionsl range EXTENDED [PACKAGE

«Adjustable hysteresis Ee «Adjustable firing burst repetition TYPE NUMBER PIN POSITION [MATERIAL] CODE | time Toazeos | 16 | plastic | SOT38 * Adjustable pulse width ‘© Supplied from the mains * Provides supply for external temperature bridge © Low supply current, low dissipation September 1990 1108 MH 7110826 0079432 576

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B compere aoa meng gonertor output ouout reocroseng compute ne utat sage detector output ‘rvering opt ‘uput TCA280B sous — [a - era zen oe a 1 rousd pulse mah enable put ——_ortemat compartr wngoer mou vip sage coating Testor [severing apt rout comparator non eee siege ‘over epee santeing put reaaais Fig.1 Block diagram. PINNING SYMBOL | PIN | DESCRIPTION f [PW | 1 | pulse width controlinput | U [Qz___|_ 2 _|zero-crossing detector output jew i jis] Vee [Rt [ 8 extemalesistor [ace | 4 | comparator non-inverting output az [15] as [Ice |S ___[ comparator non-inverting ipput ax Ba] a] is [ic [6 [eomparatorinvertinginput ‘Comparator inverting ouput oct [4] [13] axe INKA | __8 _| output stage inhibiting input re TCA280A [A | 8 [output stage mput fier [12] enz [QA | 10 [output stage output | y [vos [11 [postive supp re- Lo pr} voc [ENZ | 2 [enable input, zero crossing detector oe Fi] aA extemal resistor and diode [S| 14 [sawtooth generator tngger input nna [a | fojia [QS___| 18 _ | sawtooth generator output [vec | 18 [ground rasan Fig.2 Pin configuration. September 1990 1109 @® 7110826 0079433 40° i

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B FUNCTION DESCRIPTION internat stabilizer diodes/transistor Output QZ, which produces The TCA2808 contains fourcircuits, Network. The value of Rq should be —_negative-going output pulses, is an that may be interconnected to chosen such that it can supply the ——_n-p-n open-collector output that povlorm the functonsrequred, anda cuTentforthe TCAZB0B (see Fig.4) require an external resistor supply section. The four circuits area PWS anycurrentdrawn by an extemal connected to Voc. zero-crossing detector, a differential (petipherad ses hauieieg toVec fier, a sawtooth generator and Smoot Comparator Seat etage 9 capacitor C1. Any excess currentis / bypassed by the internal diode/ IC+ and IC- (pins 5 and 6) are transistor stabilizing network. The differential inputs of a comparator or ‘Supply: Vec and RX2 (pins 11 and maximum rated current must not be _ differential amplifier, with QC+ and 13) exceeded. QC- (pins 4 and 7) as complementary The TCA2B0B may be supplied by an During the negativehatfofthemains outputs. OC+ and GC- are p-n-p external DC power supply connected _cvelethe external smoothing open collector outputs requiring toVextpin tt) butcan besupplied capacitor supplies the circuit. ts external collector resistors to Ver. Girectiyfromthe mains voltage. For caPacitance must behigh enough to C+ willbe HIGH and GC- willbe this purpose the circuit contains a maintain the supply voltage above LOW when IC+ is higher than IC-. number of stabilizer diodes. and 8 the minimum specified limit. For transistor connected betweenVoq values offgand C1 see Figs Sand6. The comparator contains a long- and Ver, that mit the DC supply tailed pair with a current source in its voltage An external resistor Ryand ‘Suitable VOR connected across the tail, The tall currents activated by a an extemal diode (mains voltage mains provides protection for the current into RX1 (pin 3). When an rated) has to be connected from the TCA2808B and the triac against inductive load is driven with phase mains to Ry2: Vee is connected tothe —'™ains-borne transients. contro! the trigger pulse may be neutral line (see Figs 5 and 6). A terminated at the instant of firing of smoothing capacitor C1 has to be Zero-crossing detector the thyristor or triac. This may be connected between Vcc and Vee. achieved by connecting RX1 viaa The circuit produces a positive ‘The TCAZ80B contains a zero- resistor to the anode of the thyristor supply voltage at Voc, this may be crossing detector toproduce pulses or triac. used to supply an external circuit that coincide with the zero crossings such as a temperature sensing of the mains voltage for minimum RF bridge. interference and transients on the Sawtooth generator mains supply. ‘The sawtooth generator may be used An external diode in series with the . . . to produce bursts of trigger pulses, resistor Ry must be included (see ‘The pulse width control input PW (pin with the net effect that the load is Figs 5 and 6). The maximum reverse _ 1) allows adjustment of the pulse periodically switched on and off, current (10 uA) through pin 13 must width at output Q2 (pin 2), to the not be exceeded or circuit operation Value required for the triac, by The heart of the sawtooth generator cannot be guaranteed. Note that the choosing the value ofthe exteal_—_ ig a thryristor arrangement. The firing diode also reduces the required synchronization resistor Rs between burst repetition time is usualy powerrating of resistor Ry by nearly PWandtheAG mains. Thepulse determined by an external resistor 50%. width is inversely proportional tothe and capacitor connected to the input current and to the mains sawtooth generator input IS During the positive half of the mains frequency. (pin 14). The repetition time is typical cycle the current through the external ‘The zero-crossing detector is 0.7xRC. voltage dropping resistor Rg charges: inhibited when the ENZ input (pin 12) the external smoothing capacitorC1 _is HIGH, and enabled when ENZ is. to the stabilizing voltage of the LOW, e.g. connected to Vee. September 1990, 1110 Mi 7110826 0079434 345 a

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B FUNCTIONAL DESCRIPTION The output QA (pin 10) is an n-p-n ‘open-emitter output capable of (Continued) sourcing an output current, ie. The output QS (pin 15) is an n-p-n Conventional current flow out of the open-collector output. During the circuit flyback period of the sawtooth pulse the transistor is ON and is capable of A gate resistor Rg should be ‘sinking current. connected between the output QA. and the triac or thyristor gate to limit the output current to the minimum Output stage required by the triac or thyristor. This ‘The output stage is driven by current minimizes the total supply current drawn from input IA (pin 9). This drive __and the power dissipation. Output may be inhibited by drawing current QA's protected with a diode to Vee from inhibiting input INHA (pin 8). (pin 16) against damage by Hence the output will be HIGH only if undershoot of the output voltage, current is drawn from IA and no @.g. Caused by an inductive load. current ts from of INHA i.e. if inhibiting input INHA (pin 8) is HIGH and input IA (pin 9) is LOW. Both inputs may be used as a single input provided the other one is suitably biased. LIMITING VALUES In accordance with the Absolute Maximum System (IEC 134), SymBoL [PARAMETER | CONDITIONS | MIN. [ MAX. [UNIT | Vec ‘supply voltage (voltage source) Vv supply current (current source) A Limam [repetitivepeak 80 ma [laxaismy _[non-repetitvepeak te tus Te TA [Inxaey [reverse ta] [vi__[inputvottage,alinputs TT a fv Gifferential input voltage between (C+andic- [Tv [x [ineutcurent.atinpte | CY YO | output current 20 average a non-repetitive peak t<300ys ~600 [Pix [totalpowerdissipation [seeps TT TC storage temperature range a operating ambient temperature range a September 1990 m1 Mi 7110826 0079435 265 a a

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B 1000 72702214 CTT TTT ttre yt terry yet ey ett SERRE Pee Pr rrrre rrr ry yyy eee p,, Ree tot CTT TTP (mw) CTT TTT rer Pry ree ee PPT TPP eee SRSRS Se Ss eee soo LEE TNS Pp re Ee LTT TTT err rer rin TTT rrr PET er er PPP ee Pir rrr yr eee PTT Tree err ey eee PPT yr ere PPP PEPE Terr rrr ree (Se eee 0 50 100 Tamp(°C) 150 Fig.3 Power derating curve. CHARACTERISTICS Voc = 11 to 17 V; Vee = OV; taxs = 10 BA oF Inxt = -30 pA; Tamb = 25 °C unless otherwise specified [ SYMBOL | PARAMETER conpmons | Min. | Tp. | Max. | unt | Supply Supply voltage, external OL Veco supply voltage, internally Trxaams) = 5A, Vv generated unloaded foc supply current, unloaded 0.75 mA Alec/ variation with supply voltage 0.03 | MAW Voc Pulse width control input PW (pin 1) input volfage Vew 9 Ipw = 100 pA : v Vepw. Ipw =-100 pA 0.25 v | lewrws) | input current(RMS value) laz=05ma | 30 |= 50 uA tw pulse width TpwiRMs) 790 f = 50 Hz (at pin 2) [avav [variation wih suppy vonage [| | | Zero crossing detector enable input ENZ (pin 12) [Venn [inputvotageniGh [wwe TT Vd Input voltage LOW Jenable CT UT Soptember 1990 a2 MH 7110826 0079436 11] a

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B CHARACTERISTICS (continued) [lozu JoutputcurentHiGH Ta [lon [ovtputcunentiow [+i - f= | a0 ma | [Vio | diferentalinputvotage [id ee a a fic {ideo eertv ffs | 0 [Vou [outputvotage ——([lon=03RA_[VectS | - [|v _| [ton [outputcurentHIGH - | =f 03 [ma Jt. [outputcurenttow P90 a [Wish | inputtiggervoltage TO 8s Tv __[tisy_...L input triager current [= a Visi. thyristor holding voltage i Tet 28 IV - im CY ‘Sawtooth generator output QS (pin 15) los. [outputeurrentLow Ta ios —_[outoutcurentighH | *Y Ot fd Output stage inhibiting input INHA (pin 8) IiwnaTinputcurrent [ias-t00WA T8020 Miwa _[inputvottage [w= =100pA veo = Tv ‘Output stage input 1A (pin'9) ha [inputcurrent tan -200mA TS TA [Via___|imputvottage [w= -S0pA [Veo-83 [= | Veo? [VT Voan | output voltage HIGH Toan = -200 MA Vec-2.8 7 Voc = 13 a ae 2 eed [toan [outputcurentHIGH TT 200 a CT ‘September 1990 113 M@™ 7110826 0079437 OSS ee

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B 20 azmoms EEE EEE EEEEEE EEE EE EEE EEE EE Ee oi PEEP yyy rrr eee st ttTt TT ttre rt rp ee PTY TTT TTT Trt ttt rit tt io TTT Ty Pitt Tere ety tt [TTT Try | LTT Try Ter tt tt eet yt PTET ETT rt et easvt PP eEEEEHE HHH Aa AO sat Mer L eee Za PEt eae te | Lit Vega ee st ee sae adaGuusueesuesesuueeruesee Pr TTT T Tyr yt etre rrr LJ Te TTT rte e tere te ey ee ott TTT rir itt rier re rt rrr rr et yey 0 700 200 Toa (mA) 300 laa Fig.4 Average supply current Ipx2(ay) as a function of output current Iga with triac gate trigger voltage Var as a parameter; typical performance. September 1990 114 MB 71108e6 0079438 T14 a

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B 7252099.2 1000 pq oo ae SS A A SS A a SS a SO Prag ee (w) PrP R PrP PTT ry ry yy ye ee & CODOC ofl tT itty 100 ro eee eee es a yay re ee A A A OO PP A Ltt | PNET rT NAT LLL | 7 a ss os A ee se —_ EAS EH ein rat a a CACC See ee es iol Leet 4 ® MEEDZARRRRRRRREEE W| [rem] 7 . 1234 5 6 7 8 9 10 11 12 13 14 15 16 17 18 meee Trxacav) (mA) Note: In certain applications the time proportional controller requires a value of smoothing capacitor (C1) three times higher; typical performance. Fig.5 Voltage dropping resistor Rg, dissipation Prg in this resistor, and recommended minimum value of smoothing capacitor C1 as a function of average supply current lax2(av). for the supply arrangement with series diode D. !px2(ay) includes the supply of any exernal (peripheral) circust supplied from Vcc. September 1990 115, @® 7110826 0079439 920 i

Philips Semiconductors Integrated Circuits Product specification General-purpose triggering circuit TCA280B 100 77639982 con es oe oe oo oe ee oo es rg GN EE IWAN TP re et Hka AS KANG PP ye | ANN TTT TT | LINAS oANSS ESS SS feel TACK CESS LAAN SSR TEIN 220v KAKENSSSR EEE LL SNONSOSSDDALT LT AUS = ] gov LEN LP PE ee a ls RS ee ee ee ee FEE ESCEEEEAS SSH ao N PPP AE TT wAl *e{] PH tH ® PET T PP oov | cr Th S67 BO 1011 1213 14 15 16 17 18 oa Trx2(av) (mA) Note: lnx2yay includes the supply current of any external (peripheral) circuit supplied from Voc. Fig.6 Voltage dropping resistor Rg and power dissipation Pag in this resistor as a function of supply current Irx2iav), for the supply arrangement with series diode. Also shown is the RMS mains supply voltage (Vsiams) as a function of I;x2,av); typical performance. September 1990 1116 M@™ 7110826 0079440 bye mm a

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