- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄1922 > HC5513BIM (Intersil)IC SLIC DLC/FLC LP STDBY 22-DIP PDF資料下載
參數(shù)資料
| 型號： | HC5513BIM |
| 廠商： | Intersil |
| 文件頁數(shù)： | 19/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SLIC DLC/FLC LP STDBY 22-DIP |
| 標準包裝： | 37 |
| 系列： | UniSLIC14 |
| 功能： | 用戶線路接口概念（SLIC） |
| 電路數(shù)： | 1 |
| 電流 - 電源： | 2.25mA |
| 功率（瓦特）： | 1.5W |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 通孔 |
| 封裝/外殼： | 22-DIP（0.400"，10.16mm） |
| 供應商設備封裝： | 22-PDIP |
| 包裝： | 管件 |
| 包括： | 接地鍵檢測器，可編程回路電流檢測器，振鈴往返檢測器，熱關機 |
8
Circuit Operation and Design Information
The HC5513 is a current feed voltage sense Subscriber Line
Interface Circuit (SLIC). This means that for short loop
applications the SLIC provides a programed constant current to
the tip and ring terminals while sensing the tip to ring voltage.
The following discussion separates the SLIC’s operation into
its DC and AC path, then follows up with additional circuit
and design information.
Constant Loop Current (DC) Path
SLIC in the Active Mode
The DC path establishes a constant loop current that flows
out of tip and into the ring terminal. The loop current is
programmed by resistors RDC1, RDC2 and the voltage on
the RDC pin (Figure 13). The RDC voltage is determined by
the voltage across R1 in the saturation guard circuit. Under
constant current feed conditions, the voltage drop across R1
sets the RDC voltage to -2.5V. This occurs when current
flows through R1 into the current source I2. The RDC voltage
establishes a current (IRSN) that is equal to VRDC/(RDC1
+RDC2). This current is then multiplied by 1000, in the loop
current circuit, to become the tip and ring loop currents.
For the purpose of the following discussion, the saturation
guard voltage is defined as the maximum tip to ring voltage
at which the SLIC can provide a constant current for a given
battery and overhead voltage.
For loop resistances that result in a tip to ring voltage less than
the saturation guard voltage the loop current is defined as:
where: IL = Constant loop current.
RDC1 and RDC2 = Loop current programming resistors.
Capacitor CDC between RDC1 and RDC2 removes the VF
signals from the battery feed control loop. The value of CDC
is determined by Equation 2:
where T = 30ms.
NOTE: The minimum CDC value is obtained if RDC1 = RDC2.
Figure 14 illustrates the relationship between the tip to ring
voltage and the loop resistance. For a 0
loop resistance both
tip and ring are at VBAT/2. As the loop resistance increases,
so does the voltage differential between tip and ring. When
this differential voltage becomes equal to the saturation guard
voltage, the operation of the SLIC’s loop feed changes from a
constant current feed to a resistive feed. The loop current in
the resistive feed region is no longer constant but varies as a
function of the loop resistance.
HC5513
VTX
RRX
RDC1
RDC2
CDC
RSN
RDC
IRSN
TIP
RING
-2.5V
IRING
ITIP
A2
ITIP
IRING
RSG
-5V
LOOP CURRENT
CIRCUIT
SATURATION GUARD
CIRCUIT
A1
I1
I2
R1
+
-
+
-
+
-
+
-
-5V
FIGURE 13. DC LOOP CURRENT
-5V
I
L
2.5V
R
DC1
R
DC2
+
-------------------------------------- 1000
×
=
(EQ. 1)
C
DC
T
1
R
DC1
---------------
1
R
DC2
---------------
+
×
=
(EQ. 2)
01.2K
-50
-40
-30
-20
-10
0
VBAT = -48V, IL = 23mA, RSG = 21.4k
LOOP RESISTANCE (
)
VTIP
VRING
RESISTIVE FEED
REGION
TI
P
TO
RING
VO
LTAG
E
(V)
CONSTANT CURRENT
FEED REGION
SATURATION
GUARD VOLTAGE
SATURATION
GUARD VOLTAGE
∞
FIGURE 14. VTR vs RL
HC5513
相關PDF資料 |
PDF描述 |
|---|---|
| HC55143IM | IC SLIC UNIVERSAL LP 32-PLCC |
| HC5515CMZ | IC SLIC ITU CO/PABX LP 28-PLCC |
| HC9P5504B-5ZX96 | IC SLIC EIA/ITU PABX 24-SOIC |
| HD3-6402R-9Z | IC UART CMOS 5V 2MHZ 40-DIP |
| HD9P6409-9Z96 | IC MED MANCHESTER 1MHZ 20-SOIC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HC5513BIM96 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC5513BIMX6176C | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC5513BIP | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC5513IMR4465 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| HC5513IPA02 | 制造商:Harris Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。