参数资料
型号: E-L6911ETR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: 1.3 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
封装: SO-20
文件页数: 3/35页
文件大小: 563K
代理商: E-L6911ETR
L6911E
Device description
11/34
Connecting RT to VCC = 12V or to VCC = 5V the frequency is reduced (current is forced into
the pin), according to the following relationships:
Equation 2
Equation 3
Switching frequency variations vs. RT are reported in Figure 3 on page 11.
Note:
That forcing a 50
A current into this pin, the device stops switching because no current is
delivered to the oscillator.
Figure 3.
Switching frequency variations vs. RT
f
S
200kHz
4.306 10
7
R
T k
()
-----------------------------
+
=
VCC = 12V
f
S
200kHz
15 10
7
R
T k
()
--------------------
+
=
VCC = 5V
10
100
1000
Frequency [kHz]
10
100
1000
10000
Res
istance
[k
Ohm]
RT to GND
RT to VCC=12V
RT to VCC=5V
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