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PJ31002
Tone Ringer For Telephone Set
3-5
2002/01.rev.A
HO W TO USE THE RSL PIN
In the IC, the supply initiation current (lsi) can be
changed using the RSL Pin . As show is the diagram, the
RSL (Pin 2) is grounded through resistor Rs. By changing
the Rs value, supply initiation current can be changed.
Supply
voltage
(Vcc)
vs.
supply
current
(lcc)
characteristics resulting from changes in the value of Rs are
shown in the following diagram.
Figure 3.Ringing Start Voltage Te st C ircuit
1
2
5
Rs
Vc c
GN D
10
20
Vc c (V)
1
2
3
4
Ic c (m A)
Rs= 6.8K
Rs= 10K
Rs= 18K
1
2
3
4
8
7
6
5
+
+
8.2K
1uF/250
AC f=20H
1N4004* 4
27V
10uF/35
10K
680K
104pF
Tone Ringer
4.7uF/50
100
103pF