pbl386302 ETC-unknow, pbl386302 Datasheet - Page 13

• Manufacturer Part Number: pbl386302
• Description: Subscriber Line Interface Circuit
• Manufacturer: ETC-unknow

Figure 11. Single-channel subscriber line interface with PBL 386 30/2 and combination CODEC/filter.
voltage(POV)
voltage can be increased.
voltage is internally set to 3,2 V
hook and 1,3 V
R
and AGND, the overhead voltage can be
set to higher values, typical values can
be seen in figure 10. The R
corresponding V
are typical values for THD <1% and the
signal frequency 1000Hz.
OV
Programmable overhead
With the POV function the overhead
If the POV pin is left open the overhead
RESISTORS: (Values according to IEC E96
series)
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
is connected between the POV pin
SG
LD
OV
LC
REF
R
T
TX
B
RX
FB
1
2
3
4
RT
F1
P1
, R
, R
F2
P2
VB2
VB
+12 V /+5V
Peak
= 0
= 49,9 k
= User programmable
= 32,4 k
= 49,9 k
= 64,9 k
= 105 k
= 24,9 k
= 22,1 k
= 52,3 k
Depending on CODEC / filter
= 604 k
= 604 k
= 249 k
= 280 k
= 330
= Line resistor, 40
= 10
TRO
D
RING
VB
D
TIP
on-hook. If a resistor
BB
(signal headroom)
K
R
D
VB2
C
C
VB
VB2
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
1% 1/10 W
5% 2 W
1% 1/10 W,(Note 1)
OV
and
Peak
1% match
R
R
R
E
RT
F2
F1
RG
in off-
R
R
C
OVP
1
2
GG
V
So if the gain 2-wire to 4-wire is 0dB,
side. Signal levels between 3,2 and
6,4 V
handled with the PTG shorted so that the
gain G
that the two-wire impedance, R
4-wire to 4-wire gain has to be recalcu-
lated if the PTG is shorted.
current at the 2-wire side can not be
greater than 9 mA.
3,2 V
TX
Observe that the 4-wire output terminal
Please note that the maximum signal
C
1
CAPACITORS: (Values according to IEC
E96 series)
C
C
C
C
C
C
C
C
C
C
C
DIODES:
D
D
D
VB
R
R
can not handle more than 3,2 V
VB
VB2
VCC
TC
RC
HP
LP
TX
GG
1
2
VB
VB2
BB
P2
P1
Peak
Peak
2-4S
R
3
on the 2-wire side can be
R
is maximum also for the 2-wire
become -6,02dB. Please note
4
= 100 nF
= 150 nF
= 100 nF
= 2,2 nF
= 2,2 nF
= 47 nF
= 150 nF
= 100 nF
= 220 nF
= 330 nF
= 330 nF
= 1N4448
= 1N4448
= 1N4448
C
SLIC No. 2 etc.
C
C
2
R
RC
TC
SG
C
C
HP
LP
PBL 386 30/2
PTG
RRLY
HP
NC
RINGX
BGND
TIPX
VBAT
VBAT2
PSG
NC
LP
DT
DR
100 V 10%
100 V 10%
100 V 10%
100 V 10%
100 V 10%
100 V 10%
100 V 10%
10 V 10%
10 V 10%
63 V 10%
63 V 10%
R
AGND
RSN
POV
VCC
VTX
REF
PLC
PLD
DET
NC
NC
NU
and the
C1
C2
Peak.
SYSTEM CONTROL
VCC
R
R
R
R
REF
OV
LC
LD
INTERFACE
R
R
T
How to use POV:
1. Decide what overhead voltage(V
2. In figure 10 the corresponding R
3. If the overhead voltage exceeds
R
C
TX
NOTE:
1. R
OVP:
Secondary protection ( e. g. Power
Innovations TISPPBL2). The ground
terminals of the secondary protection should
be connected to the common ground on the
Printed Board Assembly with a track as
short and wide as possible, preferable a
groundplane.
needed. The POV function is only
needed if the overhead voltage
exceeds 3,2 V
the decided V
3,2 V
changed to -6,02dB by connecting the
PTG pin to AGND. Please note that
the two-wire impedance, R
wire to 4-wire gain has to be recalcu-
lated.
P1
and R
R
R
Peak
TX
RX
C
VCC
PBL 386 30/2
, the G
P2
R
B
may be omitted if D
TRO
Peak
2-4S
R
CODEC/
can be found.
+
-
VCC
PBL 386 30/2
-
+
0
FB
Filter
gain has to be
0
VB
R
is in place.
and the 4-
OV
TRO
for
) is
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