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參數(shù)資料
| 型號： | LQN-3.3/45-D12-C |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-10 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大小： | 311K |
| 代理商： | LQN-3.3/45-D12-C |
1] All models are tested and specied with an external 33μF tantalum input capaci-
tor, 470μF Poscap output cap paralled with a 100μF ceramic output capacitor.
These capacitors are necessary to accommodate our test equipment and may
not be required to achieve specied performance in your applications. All models
are stable and regulate within spec under no-load conditions.
[2] Input Ripple Current is tested and specied over a 5-20MHz bandwidth. Input
ltering is CIN = 200μF tantalum (100 || 100), CBUS = 1000μF electrolytic,
LBUS = 1μH.
[3] Note that Maximum Power Derating curves indicate an average current at
nominal input voltage. At higher temperatures and/or lower airow, the DC/DC
converter will tolerate shorter full current outputs if the total RMS current over
time does not exceed the Derating curve.
[4] Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332
Method 1, Case 3, ground xed conditions, TPCBOARD = +25°C, full output
load, natural air convection.
[5] The On/Off Control (pin 4) may be driven with external logic or by applying
appropriate external voltages which are referenced to Common, pin 1. The
On/Off Control Input should use either an open collector/open drain transistor
or logic gate which does not exceed +VIN.
The On/Off Control may be supplied with positive logic (LO = off, HI = on) under
special quantity order.
[6] Short circuit shutdown begins when the output voltage degrades approximately
2% from the selected setting.
[7] The outputs are not intended to sink appreciable reverse current. If the outputs
are forced to sink excessive current, damage may result.
[8] Output noise may be further reduced by adding an external lter. See I/O Filtering
and Noise Reduction.
[9] All models are fully operational and meet published specications, including
“cold start” at –40°C.
[10] Regulation specications describe the deviation as the line input voltage or
output load current is varied from a nominal midpoint value to either extreme.
[11] Alternate pin length and/or other output voltages available under special quantity
order.
[12] Extreme accuracy refers to all combinations of trim adjustment, temperature,
airow and load current.
[13] See Performance Specications note 5.
[14] Output Capacitive Loading
Exceeding the maximum output capacitive load specication (at the indicated
ESR) may interfere with the Soft Start mode and possibly cause overcurrent shut-
down at startup while attempting to charge output caps. This risk increases with
combinations of high output capacitance and low Equivalent Series Resistance
(ESR) inside the capacitors, especially newer ceramic caps. Use just enough
output capacitance to achieve your noise suppression or energy storage needs
and no more. Thoroughly test your application with all components installed.
Be cautious when using the On/Off control in conjunction with high output capaci-
tance. If the output capacitors are not allowed to bleed down their voltage suf-
ciently after shutdown, certain converters may be damaged by lingering output
voltage applied as reverse current into the outputs. Most converters include a
warning to strictly limit the amount of current sourced back into the converter.
[15] Always connect the sense pins. If they are not connected to a remote load, wire
each sense pin to its respective voltage output at the converter pins.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous or Transient
15.5 Volts maximum
On/Off Control (pin 4)
+VIN maximum
Input Reverse Polarity Protection
See Fuse section
Output Overvoltage Protection
VOUT +20% maximum
Output Current
Current-limited (See note 7)
.
Devices can withstand sustained
short circuit without damage.
Storage Temperature
–55 to +125°C.
Lead Temperature (soldering 10 sec. max.)
+280°C. Refer to solder prole.
Absolute maximums are stress ratings. Exposure of devices to greater than any of these condi-
tions may adversely affect long-term reliability. Proper operation under conditions other than
those listed in the Performance/Functional Specications Table is not implied nor recommended.
NOTES
LQN D12 Models
Non-Isolated, Single Output, 12VIN, 0.8-5VOUT
45-50 Amp, -Brick, DC/DC Converters
www.murata-ps.com
email: sales@murata-ps.com
2009.09.14
MDC_LQN D12 Models.B04 Page 6 of 15
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