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參數(shù)資料
| 型號： | MB3778PFV |
| 廠商： | FUJITSU LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| 中文描述： | 0.075 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 16/29頁 |
| 文件大小： | 276K |
| 代理商： | MB3778PFV |
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MB3778
16
I
SETTING THE SOFT START TIME
When power is switched on, the current begins charging the capacitor (C
DTC1
) connected the DTC1 terminal (pin
6). The soft start process operates by comparing the soft start setting voltage, which is proportional to the DTC1
terminal voltage, with the triangular waveform, and varying the ON-duty of the OUT terminal (pin 7).
The soft start time until the ON duty reaches 50
%
is determined by the following equation:
Soft start time (time until output ON duty
=
50
%
) .
ts (s) :
C
DTC1
×
Ra
×
Rb
/
(Ra
+
Rb)
×
ln (1
1.6 (Ra
+
Rb)
/
(2.46 Rb) )
For example, if Ra
=
4.7 k
and Rb
=
10 k
, the result is:
ts (s) : 0.1
×
C
DTC1
(
μ
F)
Soft Start on DCT1 terminal (DTC2 is similar)
V
REF
Ra
Rb
C
DTC1
DTC1
16
6
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MB3778PFV-E1 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
| MB-378 | 制造商:Maxxtro 功能描述: |
| MB3782 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Switching Regulator Controller |
| MB3782_1 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:ASSP Power Supplies BIPOLAR Switching Regulator Controller |
| MB3782P | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:ASSP Power Supplies BIPOLAR Switching Regulator Controller |
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