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參數(shù)資料
| 型號(hào)： | MB3785APFV |
| 廠商： | FUJITSU LTD |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | Switching Regulator Controller (4 Channels plus High-Precision, High-Frequency Capabilities) |
| 中文描述： | 0.03 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQFP48 |
| 封裝： | PLASTIC, LQFP-48 |
| 文件頁(yè)數(shù)： | 16/29頁(yè) |
| 文件大?。?/td> | 293K |
| 代理商： | MB3785APFV |
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16
MB3785A
I
METHOD OF SETTING THE OUTPUT CURRENT
The output circuit is comprised of a totem-pole configuration. Its output current waveform is such that the ON-current
value is set by constant current and the OFF-current value is set by a time constant as shown in Figure 2. These
output currents are set using the equations below.
ON-current = 2.5/R
E
[A]
(Voltage on output current-setting pin V
E
= 2.5 V)
OFF-current time constant = proportional to the value of C
B
Figure 1. CH1 to CH4 Output Circuit
Figure 2. Output Current Waveform
Figure 3. Voltage and Current Waveforms
on Output Pin (CH1)
Figure 4. Measuring Circuit Diagram
Drive transistor
C
B
OFF-current
OFF-current
setting block
ON-current
R
E
V
E
0
t
O
ON-current
OFF-current
10
0
V
O
40
20
0
–20
–40
I
O
0
0.4
0.8
1.2
1.6
2.0
t (
μ
S)
V
CC
= 10 V
1000 pF
V
CC
MB3785A
I
O
V
O
8 pin
7 pin
(5 V)
22
μ
H
10
μ
F
8.2
k
2.7
k
570 pF
82
48
1
45
46
47
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB3785APFV-G-BND(E1) | 制造商:Fujitsu 功能描述: |
| MB3788 | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:SWITCHING REGULATOR CONTROLLER |
| MB3789 | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:Switching Regulator Controller (Supporting External Synchronization) |
| MB3789PFV | 制造商:FUJITSU 制造商全稱(chēng):Fujitsu Component Limited. 功能描述:Switching Regulator Controller (Supporting External Synchronization) |
| MB3789PFV-G-BND(E1) | 制造商:Fujitsu 功能描述: |
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