- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379132 > DCR022405P-U Miniature, 2W Isolated REGULATED DC/DC CONVERTERS PDF資料下載
參數(shù)資料
| 型號： | DCR022405P-U |
| 英文描述： | Miniature, 2W Isolated REGULATED DC/DC CONVERTERS |
| 中文描述： | 微型，2W的隔離穩(wěn)壓DC / DC變換器 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大小： | 174K |
| 代理商： | DCR022405P-U |
SBVS028A DECEMBER 2000 REVISED APRIL 2004
www.ti.com
5
FUNCTIONAL DESCRIPTION
OVERVIEW
The DCR02 series offers isolation from an unregulated
power supply operating from a choice of input voltages.
This series provides a variety of regulated output voltages
at a nominal output power of 2W.
POWER STAGE
The input supply is chopped at a frequency of 400kHz
(internal oscillator divided by 2), which is used to drive the
center-tapped toroidal transformer.
RECTIFICATION
The transformer output is full wave rectified and smoothed
by the external capacitor connected to V
REC
.
REGULATOR
The
well-regulated output voltage throughout the operating
range of the device.
internal
low-dropout
regulator
provides
a
OSCILLATOR AND WATCHDOG
The DCR02 uses an internal saw-tooth generator to
provide the 800kHz onboard oscillator that is used to drive
the power switching circuit. The operation of the oscillator
is monitored by the watchdog, which will tri-state the output
driver circuit if the oscillator fails or if the SYNC pin is taken
low (shutdown mode). When the SYNC pin is returned
high, normal operation resumes.
SYNCHRONIZATION
If more than one DCR02 is being used, beat frequencies
and other electrical interference can be generated. This
interference is due to the small variations in switching
frequencies between the converters. The DCR02
overcomes this by allowing devices to be synchronized to
one another. Up to eight devices can be synchronized by
connecting the SYNC pins together, with care being taken
to minimize the capacitance of tracking.
Significant stray capacitance on the SYNC pin reduces the
frequency of the internal oscillator. If this reduction is large,
the DCR02 may be taken out with its optimized operating
parameters, and saturation of the magnetics may result,
damaging the device.
If devices are synchronized, it should be noted that all
devices will draw maximum current simultaneously at start
up. This can cause the input voltage to dip. Should it fall
below the minimum input voltage, the devices may not
start up. A low equivalent series resistance (ESR) 2.2
μ
F
ceramic capacitor should be connected as close to the
device input pins as possible.
If more than eight devices are required to be synchronized,
it is recommended that external synchronization be used.
Details of this procedure are contained in application
report SBAA035,
External Synchronization of the
DCP01/02 Series of DC/DC Converters,
available for
download at www.ti.com.
CONSTRUCTION
The DCR02 is manufactured using the same technology
as standard IC packages. There is no substrate within the
package. The DCR02 is constructed using a driver IC,
low-dropout voltage regulator, rectifier diodes, and a
wound magnetic toroid, all mounted on a leadframe. The
DCR02 requires no special printed circuit board (PCB)
assembly processing, since there is no solder within the
package. The result is an isolated DC/DC converter with
inherently high reliability.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DCR02 | Miniature, 2W Isolated REGULATED DC/DC CONVERTERS |
| DCR021205 | Miniature. 2W Isolated Regulated DC/DC Converters |
| DCR1260Y60 | Phase Control Thyristor Target Information |
| DCR1260Y61 | T1/E1 Transformer |
| DCR1260Y62 | T1/E1 Transformer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DCR022405P-U/700 | 功能描述:DC/DC轉(zhuǎn)換器 Mini 2W Iso Regs 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: |
| DCR022405P-U700 | 制造商:BB 制造商全稱:BB 功能描述:Miniature, 2W Isolated REGULATED DC/DC CONVERTERS |
| DCR03B | 制造商:DCCOM 制造商全稱:Dc Components 功能描述:TECHNICAL SPECIFICATIONS OF SENSITIVE GATE SILICON CONTROLLED RECTIFIERS VOLTAGE RANGE - 200 to 600 Volts |
| DCR06C | 制造商:DCCOM 制造商全稱:Dc Components 功能描述:TECHNICAL SPECIFICATIONS OF SENSITIVE GATE SILICON CONTROLLED RECTIFIERS VOLTAGE RANGE - 300 to 600 Volts |
| DCR06D | 制造商:DCCOM 制造商全稱:Dc Components 功能描述:TECHNICAL SPECIFICATIONS OF SENSITIVE GATE SILICON CONTROLLED RECTIFIERS VOLTAGE RANGE - 300 to 600 Volts |
發(fā)布緊急采購，3分鐘左右您將得到回復。