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參數(shù)資料
| 型號： | L4909 |
| 廠商： | 意法半導體 |
| 英文描述： | EXTERNALLY ADJUSTABLE MULTIFUNCTION REGULATOR |
| 中文描述： | 外部可調多功能調節(jié)器 |
| 文件頁數(shù)： | 5/7頁 |
| 文件大?。?/td> | 61K |
| 代理商： | L4909 |
5/7
L4909
The current protection is a function of the Vce, i.e. the drop between input and output voltages (Vin-Vo). The
shape of that relationship is shown in following figure 1.
Figure 1.
Figure 2. REGULATOR TYPICAL APPLICATION
(*)EN1
2
14
11
1
15
12
V
INA
V
INB
(*)EN2
(*)EN3
4.7K
PULL-UP
RESISTOR
100
μ
F
R
B3
R
B2
R
B1
R
A3
R
A2
R
A1
+5V
ULTRAFAST FUSE
FROM
RECTIFIER
330nF
100nF
SCR
OC
FB3
FB2
FB1
V
O3
V
O2
6
3
8
13
7
9
5
4
V
O1
TRIG
GND
100
μ
F
100nF
100
μ
F
100nF
D00AU1154
(*) It is possible to enable the regulators connecting the ENx pins to Vinthrough a 25K
Suggested value forR
Ax
is 1.2K
Thevalue of R
Bx
mustbe choosen,depending onthe desiredoutput voltageV
ox
following the
formula:
R
Bx
= R
Ax
1.27
V
ox
-1
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