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參數(shù)資料
| 型號： | DCP02121 |
| 英文描述： | Miniature, 2W Isolated UNREGULATED DC/DC CONVERTERS |
| 中文描述： | 微型，2W的隔離未穩(wěn)壓DC / DC轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/10頁 |
| 文件大小： | 186K |
| 代理商： | DCP02121 |
DCP02
SBVS011B
6
FIGURE 1. Connecting the DCP02 in Series.
DCP
02
V
OUT 1
V
SUPPLY
V
S
0V
DCP
02
V
OUT 2
V
OUT1
+ V
OUT 2
SYNC
SYNC
V
S
0V
0V
0V
COM
FUNCTIONAL DESCRIPTION
OVERVIEW
The DCP02 offers up to 2W of unregulated output power
from a 5V, 12V, 15V, or 24V input source with a typical
efficiency of up to 89%. This is achieved through highly
integrated packaging technology and the implementation of
a custom power stage and control IC. The circuit design
utilizes an advanced BiCMOS/DMOS process.
POWER STAGE
This uses a push-pull, center-tapped topology switching at
400kHz (divide by 2 from 800kHz oscillator).
OSCILLATOR AND WATCHDOG
The onboard 800kHz oscillator generates the switching
frequency via a divide by 2 circuit. The oscillator can be
synchronized to other DCP02 circuits or an external source,
and is used to minimize system noise.
A watchdog circuit checks the operation of the oscillator
circuit. The oscillator can be stopped by pulling the SYNC
pin LOW. The output pins will be tri-stated. This will occur
in 2
μ
s.
THERMAL SHUTDOWN
The DCP02 is protected by a thermal shutdown circuit. If the
on-chip temperature exceeds 150
°
C, the device will shut
down. Once the temperature falls below 150
°
C, normal
operation will resume.
SYNCHRONIZATION
In the event that more than one DC/DC converter is needed
onboard, beat frequencies and other electrical interference
can be generated. This is due to the variation in switching
frequencies between the DC/DC converters.
The DCP02 overcomes this by allowing devices to be syn-
chronized to one another. Up to eight devices can be syn-
chronized by connecting the SYNC pins together, taking
care to minimize the capacitance of tracking. Significant
stray capacitance (> 10pF) will have the effect of reducing
the switching frequency, or even stopping the oscillator
circuit. It is also recommended that power and ground lines
are star connected.
If synchronized devices are used, it should be noted that, at
start up, all devices will draw maximum current simulta-
neously. This can cause the input voltage to dip and should
it dip below the minimum input voltage (4.5V), the devices
may not start up. A 2.2
μ
F capacitor should be connected
close to the input pins.
If more than eight devices are to be synchronized, it is
recommended that the SYNC pins are driven by an external
device. Details are contained in a separate applications
bulletin (AB-153).
CONSTRUCTION
The DCP02’s basic construction is the same as standard ICs.
There is no substrate within the molded package. The
DCP02 is constructed using an IC, rectifier diodes, and a
wound magnetic toroid on a leadframe. As there is no solder
within the package, the DCP02 does not require any special
PCB assembly processing. This results in an isolated
DC/DC converter with inherently high reliability.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DCP021212 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Miniature. 2W Isolated Unregulated DC/DC Converters |
| DCP021212D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Miniature. 2W Isolated Unregulated DC/DC Converters |
| DCP021212DP | 功能描述:DC/DC轉(zhuǎn)換器 Mini 2W Iso Unreg DC/DC Converter RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
| DCP021212DP | 制造商:BURR-BROWN 功能描述:DC/DC CONVERTER 2W 12V/+-12V 21212 |
| DCP021212DP | 制造商:Texas Instruments 功能描述:Power Supply Function:Unregulated DC-DC |
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