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參數(shù)資料
| 型號： | 935084920112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | TELEPHONE SPEECH CKT, PDSO20 |
| 封裝： | PLASTIC, SOT-163, SO-20 |
| 文件頁數(shù)： | 38/38頁 |
| 文件大?。?/td> | 303K |
| 代理商： | 935084920112 |
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March 1994
9
Philips Semiconductors
Product specication
Low voltage versatile telephone transmission circuit
with dialler interface and transmit level dynamic limiting
TEA1064A
Stabilized peripheral supply voltage
The configuration shown in Fig.8 provides a stabilized
voltage across pins VCC2 and SLPE for peripheral circuits
(such as dialling and control circuits); the DC voltage
VLN now varies with the peripheral supply current.
The VCC2-SLPE supply must be decoupled by capacitor
C15. For stable loop operation, resistor R16 (
≈ 50 ) is
connected between VCC2 and SLPE in series with C15.
The voltage regulator control loop is completed by resistor
R15 between LN and VCC2.
For sets with an impedance of 600
, practical values are:
R15 = 200 to 600
; C15 = 220 F; C3 = 470 nF. The
ratio R15/R16
≤ 8 is for stable loop operation with
sufficient phase margin, and R15/R16
≥ 6 is for
satisfactory set impedance in the audio frequency range.
For sets with complex impedance, the value of C3 and the
ratio R15/R16 are different (further information is given in
the TEA1064A Application Report(1)).
The peripheral supply capability depends mainly on the
available line current, the required AC output swing on the
line, the maximum permitted DC voltage on the line and
the values of external components (especially R15). With
R15 = 392
and R16 = 56 (basic application) the
maximum possible AC output swing on the line as a
function of line current is as shown in Fig.9, the curve
parameter is the peripheral supply current (Ip). Different
values for R15 (from 200 to 600
) maintaining
6
< R15/R16 < 8 give different results (these are described
in the TEA1064A Application Report (1).
(1) Supplied on request.
Fig.8 Application with stabilized supply voltage for peripheral circuits: R15 = 392
; R16 = 56 .
handbook, full pagewidth
MGR063
Rexch
Rline
Iline
Vexch
DC
AC
17
REG
C3
R5
R9
10
STAB
20
SLPE
LN
1
VCC1
16
19 VCC2
11
VEE
0.25 mA
R1
R15
ISLPE
ICC1
R16
C1
C15
peripheral
circuits
Vp
Ip
TEA1064A
Ip + 0.25 mA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 935084920118 | TELEPHONE SPEECH CKT, PDSO20 |
| 935084930112 | TELEPHONE SPEECH CKT, PDIP20 |
| 0672.400 | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; Number of Contacts:55; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
| 0672.500 | Circular Connector; No. of Contacts:61; Series:; Body Material:Aluminum; Connecting Termination:Solder; Connector Shell Size:24; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:24-61 |
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