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參數(shù)資料
| 型號： | STLC30R80 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | INTEGRATED RINGING SLIC FOR SHORT LOOP APPLICATIONS |
| 中文描述： | 綜合振鈴用戶接口短環(huán)路應(yīng)用 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 172K |
| 代理商： | STLC30R80 |
EXTERNAL COMPONENTS
Name
R
REF
(*)
Function
Formula
Typical Value
30.1k
±
1%
Internal current reference programming
resistor
Battery ripple rejection capacitance
I
REF
=
1.16
R
REF
C
SVR
C
SVR
=
1
2
π
fp
1.3M
C
RT
= (25/fring)
470nF
100nF
±
10% 100V
@ fp = 1.22Hz
470nF
±
20% 6V
@ 25Hz
1.5k
±
1%
C
RT
Ring Trip capacitance
R
DC
DC sinthesized resistance
programming resistor
AC/DC splitter capacitance
R
DC
= 5[R
feed
-2Rp]
R
DC
≥
1k
C
AC
C
AC
=
1
2
π
fsp
R
DC
R
S
= 25
2Rp
Z
AC
= 25[Zs - 2Rp]
ZA = 25
Zs
ZB = 25
Zl
10
μ
F
±
20% 15V
@ fsp = 10Hz
2.5k
±
1%
12.5k
±
1%
15k
±
1%
15k
±
1%
220pF
±
20%
@ fo = 250kHz
600k
±
0.5%
600k
±
0.5%
BD140, MJD32
20W 1/4W
20
1/4W
±
1%
51.1k
±
1%
R
S
ZAC
ZA
ZB
C
COMP
Protection resistor image
2 wire AC impedance
SLIC impedance balancing network
Line impedance balancing network
AC feedback compensation
capacitance
Sensing resistor for Ring Trip
Sensing resistor for Ring Trip
External transistor
Line series resistor
Line series resistor
Current limiting setting resistor
C
COMP
=
2
2
π
fo
[100
Rp]
RS1
RS2
Q
EXT
RPT1
RPR1
R
LIM
(*)
1000
RR
1000
RR
(1)
≥
20
≥
20
R
LIM
=
10
3
1.16
I
LIM
; 26k
÷
64.9k
R
SWITCH (***)
Current limiting setting resistor
R
switch
[k
]
=
24.4k
R
LIM
[k
]
R
LIM
[k
]
24.4k
R
TH
=
200
1.16
I
TH
; 23.7k
÷
86.6k
K
V
TR
T
47k
R
TH
(**)
OFF/HOOK DETection threshold
setting resistor.
Polarity reversal transition time
programming
26.1k
±
1%
C
REV
C
REV
=
;
K
=
1
3750
47nF for 5.67V/ms
RDA
Output Voltage Drop Adjustment
RDA
=
Drop
20k
9.6
Drop
R
TTX
= 12.5
[Re (ZL
TTX
) + 2R
P
]
10k
(
Drop = 3.2V) (2)
R
TTX
C
TTX
Teletax Cancellation Resistor
Teletax Cancellation Capacitor
3.75k
C
TTX
=
1
(
12.5
I
m
(
ZL
TTX
)
2
π
f
TTX
)
RPT2
RPR2
D1
D2
CH
Protection resistor
Protection resistor
Overvoltage protection
Dual Battery Operation
Trans-Hybrid Loss Frequency
Compensation
Power Supply Filter
Battery Supply Filter
≥
8
≥
8
1N4448
1N4448
220pF
±
30%
CH = CCOMP
C
VCC
C
VB
100nF
±
20%
100nF
±
20% 100V
Notes:
(1) Transistor characteristics: h
≥
25, I
≥
100mA, V
≥
60V, f
≥
15MHz. PDISS depends on application, see Appendix.
For SMD application possible alternatives are MJD350 in D-PACK or BCP53 in SOT223
(2) Typical value needed for 2.2Vrms metering pulse level, if no metering RDA = 0
.
(*) R
and RLIM should be connected close to the corresponding pins of STLC30R80.
Avoid any digital line or high voltage swing line to pass close to I
REF
and R
LIM
pins. Eventually screen these pins with a GND track.
(**) Inside the formula the coefficient 1.16 must be changed to 1.2 if the selected value of I
Th
is lower than 5mA.
(***) This resistor must be used only in presence of REN number and short loop see description at page 5/13.
STLC30R80
7/13
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