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DBL 5002

dbl5002

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AdalbertoRoque
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214 views6 pages

DBL 5002

dbl5002

Uploaded by

AdalbertoRoque
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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ques DBL 5001/2 TONE RINGER aor Unit: mm. The oscillator frequencies can be adjusted over a wide range by selection of extemal components COFEATURES © Designed telephone bel replacement © Adjustable 2-requency tone © Low current drain © Buit.n hysteresis prevents false triggering and rotary ial “Chirp” (© External triggering ringer cisable( 5001) ‘© Adjustable for reduced supply itiation current(5002) CI APPLICATIONS © Telephone tone ringers © Alarms or other alerting devices © Extension tone ringer modules (C1 MAXIMUM RATINGS [ Characteristics Supply Voltage Power Dissipation Operating Temperature [_ Storage Temperature ees DBL 5001 /2 (IBLOCK DIAGRAM {i} } REGULATOA WITH all vevenesis satel x nro. 8 Jomout {e]oro ” “+ 6 O51 O82 oma ouput Input veut LFO Low Frequency Ose, HFO High Fraueney Ose Pin 3.4: Low Frequency Time Constant in 6.7: High Frequency Time Constant “Regulator ckcui nas bustin hysteresis o prevent aie inggering and rotary da! “Chips” COELECTRICAL CHARACTERISTICS (Unless otherwise specitied, Ta=25°C) Characteristic | Symbol | Test condition [Typ [Max] Unit} Operating Supply Votage Vee = =[aty iniiaion Supply Vottage T Vocaw | Tagerin Open. No Load wl lalv Sustaining Vonage Vaus | Togerin Open. No toad fara] 19 | V ination Suppy Curent | Tec | Ra =BKR(EOD2) — T 7a | | Sustaining Current Tus | sus, No Load [TiooerVoroge Vin | 5007 Trigger Current - Tie — Oisabe Vowege ds | Soot ~ Disable Currant Tos | S001 — | Output Voltage 7 . Vout | Voc =21V, No Load Oscilator Frequency Tolerance | Alp = He | ees DBL 5001 /2 (JELECTRICAL CHARACTERISTICS (continued) “ination supply voltage Vcciw must be exceeded fo tigger oscilation. 2 Sustaining votage(V us) i the supply voltage required 0 maintain oscilation. 8 Tigger votagetVn) and rigger curently) re the conaitons applied Yo tigger ino start oscillation tor Vsus co $V cea 4. Disable voltage(Vo) and cisabe curenilos) are the conditions applied to tigger into innit c2ciation for V ccm “Vico 5. Tigger curent must be ited to his value external 6. Oscilatr frequencies are given by equations: © 1, =11(1284RC) where Ris the resstance connectad between pins 3 and 4 and Cis he capaciiance connectea between pin 3 an ground © tay = 1(1515RO) where Ris the resistance connected between pins 6 and 7, andC fscapactance connectes between pin 6 and grou. Norminal rate{twa) is the HEO when the output of LFO is high © fe 1.2519 higher rate(fy ) is the HFO when the output of LEO is low. CI TYPICAL PERFORMANCE CHARACTERISTICS Jeo-Woo Mote ee Vai VV) ot Cant der Hocgnay Rx ees DBL 5001 /2 ae 1D. APPLICATION CIRCUITS AND INFORMATION 1. Typical Tone Ringor The AG ringing vollage appears across the TIP and RING inputs of the circuit and is altenuated by capacitor (C;) and resistor (F,). C, also provides isolation from DC voltages (48V) on the line. After full wave rectlication by the bridge, the waveform is filtered by capacitor (C,) to provide a DC sypply for Tone Finger chip. As this vottage exceeds the initiation voltage Vecaw oscillation starts. With the components shown, the output frequency chops between fy and fy at a fyrale. The loudspeaker load is coupled through a 13000 to 8A transformer. To prevent OC power supply regulation problems due to high source impedance of the telephone line and coupling components C, and R, while the output impedance Of the $001 circuit is qutie low, the load impedaned must be kept fairly high. The output coupling capa itor (C,) is required with wransformer coupled loads, The variable resistor (P,) is used to acjust the audio amplitude and resistor (A,) is @ current imiting resistor. Resistor Fy is a quenching resisior used to limit back emt generated by the inductive load when ringing stops. When driving a plezo-ceramic transducer type load, the coupling capacitor (C,) is not required. However, a current limiting resistor ig cequired as 's a 29V zener diode in parallel with the transducer. This diode limits the voltage transients than can be ‘generated by mechanical shocking of piezo-ceramic transducer, In the 5002 circuit, the initiation supply current ecoya) CaN be changed by using exlernal resistorfRs The resistor (Rg. is connected to GND trom pin. As this initiation voltage remains constant independent ff Fisu, the supply initiation current {ecu varies. inversely with Alg.. Thus, increasing the value of Rst will decrease the amount of AC ringing current required to trigger the device Ag. can also be used 10 compensated for smaller AC line coupling capacitors which can be used 10 alter ihe ringer equivalence rhumber ofa one ringer ccuit Io¢-V ec (5002) graph in typical perlormance characteristic Wlusrales the variation of supply current with supply voltage. Curve B(Rs. =68KM) shows the Icc "Vee characteristic for 5001 circuit Tone Ringer, Curve Ais a plot with Rg, <68KA and shows @ increase in the current drawn up 10 the niation voltage V ecuy. The lec-Vce charadterstc attr initiation remains unchanged. Curve C shows the effect of increasing Rs, above 68K. Initiation current decreases but again current alter triggering is unchanged nus DBL 5001 /2 ae [APPLICATION CIRCUITS AND INFORMATION(continued) 2. Pin 2 Input Equivalent Circuit($001) 1 Pi—o PIN 2 300% Usually pin 2is used at an open state, but in the 5001 circuit the trigger in terminal may be used to externally trigger osciallation for voltage in the range Vsus Vcc SV couwy oF disable ringer operation. The singer circuit can only oscilate when Q, and Qe are conducting, Normally when supply voltageVce exceeds the supply initiation vollage Vccin base Current flows into Q, via D; causing Q; and Q> conauet ‘This continues until Veg is taken below the minimum sustaining voltage(Vgys) 3, Enabling Oscillation af the S001 circuit for Supply Voltages less than Vecinty —r — Yoo The 5001 Circuit can oscillaie when powered from supply if voltages in he range Vsus Voc SV cooey Oscitation is ensured | [tm by forcing a current Ira(I02ASIyq Ima) into pin 2 should \ be exceeded Vir by the sum of zener voltage of Os, the Yee —— of Q; and the Veco! OaxTyp. 11¥). The requied curent sive 1 4 can be provided by connecting a resisior Ag(20KN Se SIV ce =11)/10M ) bemieen pint and Ve. ees DBL 5001/2 ee [APPLICATION CIRCUITS AND INPORMATION(continued) 4, Reducing the Effective Value of Vcc) or tne 5001 circu, To operate the 5001 circuit om a DC 12V supply, Re should be typically SOKA, This operation can also be Used to reduce the effective value of the V cciws). bY inserting a zener diode in series with Re. Then, this initiating voltage Vccqw) iS Vin +V2+ 10Re GNo 5, Inhibiting Oscillation of the 5001 circut. Md TT — Veo no oxo When the 5001 circuit is oscilating, this circuit may be inhibited for voltage in the range Vccum

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