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參數資料
| 型號： | DCR010505P |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 1 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | PLASTIC, DIP-18 |
| 文件頁數： | 12/12頁 |
| 文件大小： | 241K |
| 代理商： | DCR010505P |
DCR01 Series
9
SBVS013A
FUNCTIONAL DESCRIPTION
OVERVIEW
The DCR01 series offers isolation from an unregulated
power supply operating from a choice of input voltages. The
DCR01s provide a variety of regulated output voltages at a
nominal output power of 1W or above.
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’s output is full wave rectified and smoothed
by the external capacitor connected to VREC.
REGULATOR
The internal low drop-out regulator provides a well-regu-
lated output voltage, throughout the operating range of the
device.
OSCILLATOR AND WATCHDOG
The DCR01 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 moni-
tored 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.
DCR010505P OUTPUT VOLTAGE RIPPLE
AT 100% LOAD (20MHz Bandwidth)
200ns/div
5mV/div
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VS = 5V, IO = 10mA, CO = 0.1F, unless otherwise specified.
SYNCHRONIZATION
If more than one DCR01 is being used, beat frequencies and
other electrical interference can be generated. This is due to
the small variations in switching frequencies between the
converters.
The DCR01 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 will have the
effect of reducing the frequency of the internal oscillator. If
this is large, the DCR01 may be taken outside 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
2.2
F capacitor (low ESR) should be connected as close to the
device input pins as possible for the 5V input devices, and a
0.47
F capacitor for the 12V and 24V devices.
If more than eight devices are required to be synchronized, it
is recommended that external synchronization be used. Details
are contained in Burr-Brown’s Application Bulletin AB-153
(literature number SBAA035) available at www.ti.com.
CONSTRUCTION
The DCR01 is manufactured using the same technology as
standard IC packages. There is no substrate within the
package. The DCR01 is constructed using a driver IC, low-
dropout voltage regulator, rectifier diodes, and a wound
magnetic toroid, all mounted on a leadframe. The DCR01
requires no special PCB assembly processing, as there is no
solder within the package. The result is an isolated DC/DC
converter with inherently high reliability.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| DCR010505P | 制造商:Texas Instruments 功能描述:DC/DC CONVERTER 1W 5.0/5.0V 10505 |
| DCR010505U | 功能描述:DC/DC轉換器 Mini 1W Iso Regs DC/DC Converter RoHS:否 制造商:Murata 產品: 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: |
| DCR010505U | 制造商:Texas Instruments 功能描述:DC/DC CONVERTER SMD 10505 SOIC12 |
| DCR010505U/1K | 功能描述:DC/DC轉換器 Mini 1W Iso Regs DC/DC Converter RoHS:否 制造商:Murata 產品: 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: |
| DCR010505U/1KE4 | 功能描述:DC/DC轉換器 Mini 1W Iso Regs DC/DC Converter RoHS:否 制造商:Murata 產品: 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: |
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