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參數(shù)資料
| 型號： | MB3883PFV |
| 廠商： | FUJITSU LTD |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down |
| 中文描述： | 0.2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封裝： | PLASTIC, LQFP-48 |
| 文件頁數(shù)： | 22/39頁 |
| 文件大小： | 473K |
| 代理商： | MB3883PFV |
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MB3883
22
2. Soft Start Settings
CH6 soft start time
The soft start operation is determined by the capacitor (C+IN6) connected to the C+IN6 terminal (pin 5). The
soft start time depends on the input voltage and load current.
CH6 soft start time
CH6 soft start equivalent circuit
Example: The soft start time until CH6 output voltage reaches 95% of the set voltage is determined as follows:
ts (s) : 0.07
×
C
+
IN6
(
μ
F)
CH1 to CH5 soft start time
CH1 to CH5 soft start time
ts (s) : 1.25
×
C
S
(
μ
F)
Note : The short-circuit detection function remains working during soft start operation on channels 1 through 5.
I
SETTING THE TRIANGULAR OSCILLATOR FREQUENCY
The triangular oscillator frequency is determined by the timing capacitor (C
T
) connected to the CT terminal (pin
26), and the timing resistor (R
T
) connected to the RT terminal (pin 25).
Triangular oscillator frequency
ts (s)
=
C
+
IN6
(F)
×
37.5 (k
)
×
62.5 (k
)
100 (k
)
V
C
+
IN6
(V)
1.26 (V)
(
)
ln
1
+
C
+
IN6
V
C
+
IN6
C
+
IN6
(37.5 k
)
(62.5 k
)
Error
Amp.6
(1.26 V)
(VB : 2 V)
5
f
OSC
(kHz) :
900000
C
T
(pF)
R
T
(k
)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB3883PV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down |
| MB3885 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1-channel DC/DC Converter IC with Synchronous Rectifier |
| MB3885PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:1-channel DC/DC Converter IC with Synchronous Rectifier |
| MB3885PFV-G-BND(E1) | 制造商:Fujitsu 功能描述: |
| MB3886 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type |
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