SC9106 Shaoxing Silicore Technology, SC9106 Datasheet - Page 4

• Manufacturer Part Number: SC9106
• Description: Tone Ringer
• Manufacturer: Shaoxing Silicore Technology

640 Hz (f
transformer (1300Ω:8Ω) are not required.
resistor (R2) and capacitor (C2).
frequency oscillates at a f
(C3). The frequency can be determined using the relation f
f
program th e slope of the supply current vs supply voltage characteristics (see Fig.3),
and hence th e supply cu rrent up to the initiation voltage (Vsi). This initiation voltage
remains constant independent of RSL.
decreasing for increasing value of resistance. Thus, increasing the value of RSL, will
decrease the amount of AC ringing current required to trigger the device. As such,
longer subscriber loops are possible since less voltage is dropped per unit length of
loop wire due to the lower current level. RSL can also be used to co mpensated for
smaller AC coupling capacitors (C5 on application circuit) (higher impedance) to the
line which can be used to alter th e ringer equivalence number of a tone ringer circuit.
of the SC9106.
Curve B ( RSL=6.8k Ω) shows the I-V characteristic fo r SC9106 tone ringer. Curve A
is a plot with RSL<6.8kΩ and sh ows an increase in the current drawn up to the
initiation voltage Vsi. The I-V characteristic after initiation re mains unchanged. Curve
C illustrates the effect of increasing RSL above 6.8kW initiation current decreases but
again current after triggering is un changed.
H 2
= 1/1.203 R3*C3.
With the components shown, the output frequency chops between 512Hz (f
The loudspeaker load is coupled through a 1300W to 8W transformer.
The ou tput coupling capacito r C5 is required with transformer coupled loads.
When driving a pizeo-ceramic transducer type load, the coupling C5 and
However, a current limiting resistor is required.
The low frequency oscillator oscillates at a rate (FL) controlled by an external
The frequency can be determined using the relation f
Pin 2 of the SC9106 allo ws conn ection of external resistor RSL, which is used to
The supply current drawn prior to triggering varies inversely with RSL,
The graph in Fig.3 illustrates the variation of supply current with supply voltage
Three curves are drawn to show the variation of initiation current with RSL.
Silicore
H 2
) at 10Hz (f
SHAOXING SILICORE TECHNOLOGY CO.,LTD
L
) rate.
H 1
, f
H 2
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controlled by an external resistor (R3) and capacitor
CHMC
L
=1/1.289 R2* C2. The high
H 1
=1/1.504 R3*C3 and
SC9106
H 1
) and
4/5