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參數(shù)資料
| 型號： | SA2532K |
| 廠商： | SAMES |
| 英文描述： | SINGLE CHIP TELEPHONE DEMO BOARD |
| 中文描述： | 單芯片電話演示板 |
| 文件頁數(shù)： | 18/27頁 |
| 文件大?。?/td> | 623K |
| 代理商： | SA2532K |
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AN1500A
sames
18/27
16.3 Bipolar darlington transistor
Schematic
+
-
low cost
high DC mask at low currents
may be tight to spec limits for
some PTTs
2 transistors
10k
base resistor (R4) affects
AC impedance
16.4 VMOS-FET with surge protection
(surge protection = R3 =20
may also be used with bipolar hook transistor options)
Schematic
+
-
powerless switching
low on-resistance
low DC-mask
excellent surge protection
gate resistor (R5) does not affect
AC impedance
MOS handling required
higher cost than bipolars
few vendors
Principle: the source voltage is limited to
≈
10V (D6; see schematic) in off-hook state . High voltage peaks induced
at line will generate a high positive voltage drop across R3, lifting the gate voltage over the source voltage and thus
cause the (P-channel) Transistor to shut off.
16.5 VMOS-FET with overcurrent protection
(overcurrent protection =R3,Q5 may also be used with bipolar hook transistor options)
Schematic
+
-
powerless switching
low on-resistance
lowest DC-mask
adjustable overcurrent protection
gate resistor (R5) does not affect
AC impedance
MOS handling required
higher cost than bipolars
few vendors
extra (low cost) transistor
required
Principle: the line current generates a voltage drop across R3. If this voltage drop is >0.7V, C-E of Q5 is on and
shuts Q1 off by short circuiting its Gate/Source voltage.
The shutoff current is calculated by
I
shutoff
= 0.7V / R3 ;
installed = 0.7V/3.9
= 180mA
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SA2532P | ONE MEMORY SINGLE CHIP TELEPHONE |
| SA2532 | VERSATILE SINGLE CHIP TELEPHONE |
| SA2532AP | VERSATILE SINGLE CHIP TELEPHONE |
| SA2532AS | VERSATILE SINGLE CHIP TELEPHONE |
| SA2532CP | VERSATILE SINGLE CHIP TELEPHONE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA2532KA | 制造商:SAMES 制造商全稱:SAMES 功能描述:SINGLE CHIP TELEPHONE FOR INDIA |
| SA2532KB | 制造商:SAMES 制造商全稱:SAMES 功能描述:SINGLE CHIP TELEPHONE FOR INDIA |
| SA2532P | 制造商:SAMES 制造商全稱:SAMES 功能描述:ONE MEMORY SINGLE CHIP TELEPHONE |
| SA2532UP | 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE |
| SA2532US | 制造商:SAMES 制造商全稱:SAMES 功能描述:VERSATILE SINGLE CHIP TELEPHONE |
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