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參數(shù)資料
| 型號： | MB3825 |
| 廠商： | Fujitsu Limited |
| 英文描述： | 6-ch DC/DC Converter IC With Synchronous Rectifier |
| 中文描述： | 6通道DC / DC轉(zhuǎn)換同步整流集成電路 |
| 文件頁數(shù)： | 20/39頁 |
| 文件大小： | 465K |
| 代理商： | MB3825 |
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MB3825A
20
3.
(1) Timer-latch short-circuit protection circuit
Protective Functions
The short detection comparator in each channel detects the output voltage level, and when any channel output
voltage falls below the short detection voltage, or the SCP terminal (pin 13) voltage falls below the reference voltage,
the timer circuit starts operating and the capacitor C
SCP
connected to the CSCP terminal (pin 23) starts charging.
When the capacitor charge reaches approximately 0.7 V, the output transistor is turned off and the idle interval
becomes 100%.
When actuated, this protection circuit can be reset by turning on the power supply again.(See “METHOD OF
SETTING TIME CONSTANT FOR TIMER-LATCH SHORT PROTECTION CIRCUIT”.)
(2) Under voltage lockout protection circuit
A transient state at power-on or a momentary drop of the power supply voltage causes the control IC to malfunction,
resulting in system breakdown or system deterioration. By detecting the internal reference voltage with respect to
the power supply voltage, this protection circuit resets the latch circuit to turn off the output transistor and set the
duty (OFF) = 100 %, while at the same time holding the CSCP terminal (pin 23) at the “L”. The reset is cleared
when the power supply voltage becomes greater than or equal to the threshold voltage level of this protection circuit.
(3) Output Supply Monitor Comparator (Vcc Comp.)
The output supply monitor comparator compares the output circuit power supply (VCC(O)1, 3,VCC(O)2, VCC(O)
4, 5, 6) to the VCC level, and operates the timer-latch short protection circuit if any of the output circuit power
supplies fall below Vcc –0.65V.
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| MB3828PFV-G-BND | BOX, POLYCARBONATE IP67 CLEAR LIDBOX, POLYCARBONATE IP67 CLEAR LID; Length / Height, external:65mm; Width, external:230mm; Depth, external:80mm; Material:Polycarbonate; Colour:Grey; Approval Bodies:GL, CSA, Fimko, Gost R, EN 50298 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MB3825A | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:6-ch DC/DC Converter IC With Synchronous Rectifier |
| MB3825APFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:6-ch DC/DC Converter IC With Synchronous Rectifier |
| MB3827 | 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 |
| MB3827PFV | 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 |
| MB3828 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:Pentium DC/DC Converter IC |
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