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参数资料
| 型号： | DCP021212P |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC UNREG PWR SUPPLY MODULE |
| 封装： | PLASTIC, DIP-14 |
| 文件页数： | 6/7页 |
| 文件大小： | 108K |
| 代理商： | DCP021212P |
6
DCP02
FIGURE 1. Connecting the DCP02 in Series.
DCP
02
V
OUT 1
V
SUPPLY
V
S
0V
DCP
02
V
OUT 2
V
OUT1 + VOUT 2
SYNC
V
S
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
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
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| DCP021212P | 制造商:Texas Instruments 功能描述:DC/DC CONVERTER 2W 12V/12V 21212 |
| DCP021212PDVB | 制造商:TI 制造商全称:Texas Instruments 功能描述:Miniature, 2W, Isolated UNREGULATED DC/DC CONVERTERS |
| DCP021212PNVA | 制造商:TI 制造商全称:Texas Instruments 功能描述:Miniature, 2W, Isolated UNREGULATED DC/DC CONVERTERS |
| DCP021212U | 功能描述:DC/DC转换器 Mini 2W Iso Unreg DC/DC Converter RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| DCP021212U/1K | 功能描述:DC/DC转换器 Mini 2W Iso Unreg DC/DC Converter RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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