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參數(shù)資料
| 型號(hào)： | UEP-12/1400-D24 |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 7/11頁 |
| 文件大?。?/td> | 519K |
| 代理商： | UEP-12/1400-D24 |
UEP Models
1 5 - 3 0 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
Input Overvoltage/Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate until
the ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V
for "D48" models). Once operating, devices will not turn off until the input
voltage drops below the Undervoltage Shutdown limit (34V for "D48" models).
Subsequent re-start will not occur until the input is brought back up to the
Start-Up Threshold. This built in hysteresis prevents any unstable on/off
situations from occurring at a single input voltage.
Input voltages exceeding the input overvoltage shutdown specication listed
in the Performance/Functional Specications will cause the device to shut-
down. A built-in hysteresis of 0.6 to 1.6 Volts for all models will not allow the
converter to restart until the input voltage is sufciently reduced.
The two 6 Amp models do not feature overvoltage shutdown and withstand
surges to 100V without shutting down. For custom overvoltage protection,
contact DATEL.
Input Reverse-Polarity Protection
If the input-voltage polarity is accidentally reversed, an internal diode will
become forward biased and likely draw excessive current from the power
source. If the source is not current limited (<10A) nor the circuit appropriately
fused, it could cause permanent damage to the converter.
On/Off Control
The input-side, remote On/Off Control function (pin 3) can be ordered to
operate with either polarity (negative polarity available for 12 and 15 Volt
models only). Positive-polarity devices (standard, no part-number sufx) are
enabled when pin 3 is left open or is pulled high (+13V to VIN applied with
respect to –Input, pin 2, (see Figure 2). Positive-polarity devices are disabled
when pin 3 is pulled low (0-0.8V with respect to –Input). Negative-polarity
devices are off when pin 3 is open or pulled high (+2.4V to +10V), and on
when pin 3 is pulled low (0-0.5V). See Figure 3.
Dynamic control of the remote on/off function is best accomplished with
a mechanical relay or an open-collector/open-drain drive circuit (optically
isolated if appropriate). The drive circuit should be able to sink appropriate
current (see Performance Specs) when activated and withstand appropriate
voltage when deactivated.
Applying an external voltage to pin 3 when no input power is applied to the
converter can cause permanent damage to the converter.
Start-Up Time
The VIN to VOUT start-up time is the interval of time where the input voltage
crosses the turn-on threshold point, and the fully loaded output voltage
enters and remains within its specied accuracy band. Actual measured
times will vary with input source impedance, external input/output capaci-
tance, and load. The UEP Series implements a soft start circuit that limits
the duty cycle of the PWM controller at power up, thereby limiting the Input
Inrush current.
The On/Off Control to VOUT start-up time assumes the converter has its
nominal input voltage applied but is turned off via the On/Off Control pin.
The specication denes the interval between the time at which the converter
is turned on and the fully loaded output voltage enters and remains within
its specied accuracy band. Similar to the VIN to VOUT start-up, the On/Off
Control to VOUT start-up time is also governed by the internal soft start
circuitry and external load capacitance.
Current Limiting
When output increases to 120% to 190% of the rated output current,
the DC/DC converter will go into a current limiting mode. In this condition
the output voltage will decrease proportionately with increases in output cur-
rent, thereby maintaining a somewhat constant power dissipation. This is
commonly referred to as power limiting. Current limit inception is dened
as the point where the full-power output voltage falls below the specied
tolerance. See Performance/Functional Specications. If the load current
being drawn from the converter is signicant enough, the unit will go into a
short circuit condition. See "Short Circuit Condition."
3
2
1
200k
+INPUT
13V CIRCUIT
5V CIRCUIT
–INPUT
ON/OFF
CONTROL
3
2
1
+INPUT
–INPUT
ON/OFF
CONTROL
Figure 2. Driving the Positive Polarity On/Off Control Pin
Figure 3. Driving the Negative Polarity On/Off Control Pin
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UEP-12-1400-D48 | 制造商:MURATA 制造商全稱:Murata Manufacturing Co., Ltd. 功能描述:Single Output UEP Models |
| UEP-15/1200-D12 | 功能描述:DC/DC轉(zhuǎn)換器 18W 12V - 15V 1200mA 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(biāo)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(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| UEP-15/1200-D12-C | 功能描述:DC/DC轉(zhuǎn)換器 18W 12V - 15V 1200mA 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(biāo)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(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| UEP-15/1200-D12N | 制造商:Murata Power Solutions 功能描述:DC-DC Converter, (10 to 18) V to (15) V |
| UEP-15/1200-D12N-C | 功能描述:DC/DC轉(zhuǎn)換器 18W 12V - 15V 1200mA NEGATIVE POLARITY 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(biāo)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(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
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