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UM0271
User manual
Evaluation board
with STLC3075 SLIC for WLL
Abstract
This document is a simple user manual of the STLC3075 evaluation board, it is not a
description of the device functionalities.
This description is available in the STLC3075 data sheet and Application note (AN2132)
documents.
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July 2006
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Contents
UM0271
Contents
1
2
STLC3075 Evaluation board description . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
Transition between Ringing and Active mode . . . . . . . . . . . . . . . . . . . . . . 4
1.2
Fly-Back or Buck-Boost configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
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UM0271
1
STLC3075 Evaluation board description
STLC3075 Evaluation board description
The board is provided of a set of external connectors that permits to test all the
functionalities of the STLC3075 chip.
In Figure 1 is shown the placement of the external connectors and components inside the
board.
Following the description of these connectors.
●
VPOS is the positive supplier voltage provided to the SLIC.
●
SYST-GND is the ground of the board.
●
VBAT and VBAT/DC-DC are two outputs and they must be connected together by
means a short circuit. They allow to monitor the VBAT behavior.
●
TIP and RING are the 2W local loop port.
●
RX and TX are the 4W port (TX output, RX input)
●
D0/TTX is a control bit (used for ringing and TTX injection)
●
D2/RINGER is used to generate the ringing signal: it is a square wave input (from 20Hz
to 50Hz)
●
CKTTX is the metering pulse clock input (12 or 16 KHz square wave).
●
CLK/DC-DC is the 125KHz clock input for the DC-DC converter.
External CLK will arrive on the CLK pin connecting by the bridge EXTCK point with
CLK. Using this type of connection (EXTCK with CLK) and no external CLK signal
(125KHz) is present, the DC-DC converter goes in turn-off condition. Instead
connecting the CLK with CVCC, it will be possible to operate in autoscillation mode (the
board is usually set in this configuration).
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Switches D0, D1, D2, PD, GAIN SET are used to select the operating mode of the device.
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STLC3075 Evaluation board description
Figure 1.
UM0271
Component and connectors placement of STLC3075 evaluation board.
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1.1
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Transition between Ringing and
b Active mode
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Fly-Backro
or Buck-Boost configuration
P
ete
The board haven't got the possibility to switch automatically from Ringing to Active mode
(automatic Ring Trip detection) but it is necessary to move manually in the correct position
the D0 and D1 switches and remove the input square wave applied to D2/RINGER
connector.
1.2
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The board has the possibility, by proper modification, to choose the device configuration:
Fly-Back or Buck-Boost.
When the STLC3075 have to work in Fly-back configuration, it is necessary to modify some
connection:
–
connect capacitor C10 (120pF) and 1 Kohm resistor (R6) at point 1 and 2 of S6
–
short circuit, by a wire, R35 resistor
–
connect the R34 resistor (0.22ohm)
–
connect, by a drop of tin, point 1 and 2 of S7
–
connect the proper N-channel mos type STN4NF03L
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UM0271
STLC3075 Evaluation board description
When the STLC3075 have to work in Buck-Boost configuration, it is necessary to modify:
–
remove capacitor C10 (120pF) and 1 Kohm resistor (R6) on S6
–
short circuit, by a drop of tin, RB resistor
–
connect the R35,R35A resistor (2x.0.22ohm)
–
connect the proper inductor (L1) SUMIDA, CDRH125 on the R34,R34A position
–
connect by a drop of tin, point 2 and 3 of S6 and S7
–
connect the proper P-channel mos type IRF9510/20
The board can be set in Fly-back or Buck-Boost configuration with two external transformer
modules or with the proper coil (see AN2132).
On the board, PTC resistors are not provided.
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GND CONNECTION
S5
S4
S3
S2
S1
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R7
0 Ohm
0 Ohm
R9
GND
GND
10K
51R
GND
GND
GND
16.2K
R39
30K
R3
R2
25K
R1
PGND
BGND
AGND
GND
C4
1.5nF
16.2K
R40
51R
120pF
C3
120pF
C1
10K
J6
CKTTX
5K
R38
GND
R11
600R
R18
10K
R17
R16
10K
R15
51R
10K
R14
R12
R13
R5
68K
GND
R4
30K
16
12
C16
100nF
10
9
8
5
4
3
2
1
7
6
17
14
15
RS
R19
15K
FTTX
CTTX2
CTTX1
CKTTX
GAIN SET
PD
D2
D1
D0
DET_
N.C.
ZB
ZAC1
ZAC
GND
C6
100nF
27
STLC3075
C15
100nF
CRD
100nF
R20*
4.12K
22uF
C5
GND
C17=15nF
R20=2.2K
(*):for 5REN USA
R23
26.1K
R22
52.3K
GATE
C18
1.5nF
CLK
RING
TIP
N.C.
N.C.
N.C.
N.C.
N.C.
CZ
VF
VBAT1
VBAT
RSENSE
23
37
41
42
40
39
38
22
20
21
44
36
25
24
U1
R25
28.7K
GND
30R
R28
30R
R29
1
2
3
JCLK
S6
R30
51R
GND
CLK/DC-DC (125KHz)
EXTCK
CVCC
GND
GND
2
CVB
470nF/100V
C10
120pF
CZ
2.2nF
0R
R35
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2
1
R31
9.1K
RING
NC
GATE
TIP
GND
R32
300K
1
3
Q2:
C9,C12: 47uF/100V
D1: SMBYW01-200
Diodes D5,D6 can be replaced with the LCP1511D
C17*
22nF
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SYSTEM GND
GND
J4
D2/RINGER
GND
J3
D0/TTX
Q1
DL2
R8
3K
GND
RTTX
11
J1
TX
13
RX
28
AGND
35
BGND
26
VPOS
19
TX
CAC
18
IRF
30
CSVR
CVCC
RLIM
29
ILTF
33
RTH
31
RD
32
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RING
GND
GND
TIP
LCP1521S
U2
8
5
6
7
47uF
C12
47uF
C9
1K
R6
Rb**
0R
1
4
6
DZ2
39V
VBAT
2
GND
1
S7
D2
D3
TIP
RING
CR* 20R
120pF
R/PTC1
20R
R/PTC
L1**
CDRH125
CT*
120pF
R34*
220mOhm
GND
3
D4
D5
1
RING
1
TIP
VBAT
1
1
VBAT DC/DC
1
PGND
47nF
STN4NF03L
DZ1
39V
3
T1
SYST.GND
D1
Q2
1
C7
47uF
C8
47uF
C14
VPOS
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Figure 2.
+
J2
RX
STLC3075 Evaluation board description
UM0271
Schematic of STLC3075 evaluation board
UM0271
2
Revision history
Revision history
Table 1.
Document revision history
Date
Revision
18-Jul-2006
1
Changes
Initial release.
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UM0271
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