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參數資料
| 型號： | LE57D111TC |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁數： | 13/22頁 |
| 文件大小： | 546K |
| 代理商： | LE57D111TC |
P R E L I M I N A R Y
Le57D11 Data Sheet
13
DC Feed Characteristics
Load Line (Typical)
Vbat = -48V
Vbat = -38V
Vbat = -42V
1
2b
3a
3b
On-Hook
Off-Hook
2a
Note:
1.
Constant current region:
2a. Battery-independent anti-sat (Off-hook):
2b. Battery tracking anti-sat (On-hook):
3a. Battery tracking anti-sat (Off-hook):
3b. Battery tracking anti-sat (On-hook):
V
AB1
I
L
R
L
'
R
REF
-450
L
'
)
where R
L
'
R
L
2R
F
+
=
,
=
=
V
AB2a
43.6
V
I
L
R
88
-----------------
–
=
V
AB2b
V
AB2a
3.5
–
=
V
AB3a
V
BAT
1.8
I
L
R
240
-----------------
–
–
=
V
AB3b
V
AB3a
0.33
V
BAT
10.8
+
–
=
R
FEED
26.7K Internal
=
I
SWTH
R
REF
--150
=
R
REF
15
K
=
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