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SL5002P Datasheet(PDF) 4 Page - AUK corp

No. de pieza SL5002P
Descripción Electrónicos  TONE RINGER
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Fabricante Electrónico  AUK [AUK corp]
Página de inicio  https:www.auk.co.kr
Logo AUK - AUK corp

SL5002P Datasheet(HTML) 4 Page - AUK corp

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KSI-W012-001
4
Application Circuit And Information
1.Typical Tone Ringer
The AC ringing voltage appears across the TIP and RING inputs of the circuit and is
attenuated by capacitor(C1) and resistor (R1). C1 also provides isolation from DC
voltages(48V) on the line. After full wave rectification by the bridge, the waveform is
filtered by capacitor(C4) to provide a DC supply for Tone Ringer chip. As this voltage
exceeds the initiation voltage VCC(INI) oscillation starts. With the components shown, the
output frequency chops between fH1 and fH2 at a fL rate. The loudspeaker load is coupled
through a 1300Ω to 8Ω transformer. To prevent DC power supply regulation problems due
to high source impedance of the telephone line and coupling components C1 and R1, while
the output impedance of the 5001P circuit is quite low, the load impedance must be kept
fairly high. The output coupling capacitor (C5) is required with transformer coupled loads.
The variable resistor (R6) is used to adjust the audio amplitude and resistor (R4) is a
current limiting resistor. Resistor R5 is a quenching resistor used to limit back emf
generated by the inductive load when ringing stops. When driving a piezo-ceramic
transducer type load, the coupling capacitor (C5) is not required. However, a current
limiting resistor is required as is 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 5002P circuit, the initiation supply current ICC(INI) can be changed by using external
resistor(RSL). The resistor (RSL) is connected to GND from pin2. As this initiation voltage
remains constant independent of RSL, the supply initiation current fCC(INI) varies inversely
with RSL. Thus, increasing the value of RSL will decrease the amount of AC ringing current
required to trigger the device. RSL can also be used to compensated for smaller AC line
SL5001P/2P
DBL5001
18
27
36
45
165K
C5
R4
510
R3
C3
R5
R2
SP
191K 0.0068u F
10K
R6
RE
RSL
D1
C4
C2
15K
0.22u F
0.047u F
10u F
TIP
1u F
2K
RING
1300Ω : 8Ω
SL5001P
SL5002P


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