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參數(shù)資料
| 型號(hào)： | PBL38773/1ML |
| 廠商： | INFINEON TECHNOLOGIES AG |
| 元件分類： | 模擬傳輸電路 |
| 英文描述： | TELECOM-SLIC, PQCC32 |
| 封裝： | PLASTIC, VQFN-32 |
| 文件頁(yè)數(shù)： | 52/64頁(yè) |
| 文件大?。?/td> | 1052K |
| 代理商： | PBL38773/1ML |
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Ringing FlexiSLIC
PBL 38773/1
Power Dissipation Considerations
Data Sheet
56
DS1, 2003-06-18
9.1.3
Off-Hook Power Dissipation
The maximum off-hook power dissipation is dependent on the
V
TB voltage, the line
current
I
L and the loop resistance RLoop. The power dissipation in the SLIC can be
calculated using:
[38]
where:
Example:
Calculate the SLIC power dissipation and junction temperature when
V
TB = -24 V,
Programmed line current 27 mA, Off-hook resistance = 200
, line resistance = 0 ,
protection resistance = 2
× 40 . Ambient temperature is 85 ° C
P
Off-hook = 24 × 0.027 + 0.065 - (0.027)
2
× (200 + 0 + 2 × 40) = 0.51 W
The junction temperature is calculated like the previous example.
P
S
Supply power
P
L
The power in the Load
I
L
Programmed line current
P
q
Quiescent power, approx. 65 mW
R
Loop
The total line resistance, including fuse and the telephone impedance, in
this case the off-hook resistance
P
Off
hook
–
P
S
P
L
V
TB
I
L
×
P
q
I
L
()
2
–
R
Loop
×
+
=
–
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PBL38773/1SO | TELECOM-SLIC, PDSO28 |
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| PC-PVC-270K | 1 ELEMENT, 27 uH, GENERAL PURPOSE INDUCTOR |
| PC-PVC-331K | 1 ELEMENT, 330 uH, GENERAL PURPOSE INDUCTOR |
| PC-PVC-392K | 1 ELEMENT, 3900 uH, GENERAL PURPOSE INDUCTOR |
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