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參數(shù)資料
| 型號(hào)： | LEN-2/28-D12MH |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | SMT-10 |
| 文件頁(yè)數(shù)： | 4/10頁(yè) |
| 文件大?。?/td> | 355K |
| 代理商： | LEN-2/28-D12MH |
MDC_LEN D12 Models.B01 Page 3 of 10
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
LEN-D12 Models
Non-Isolated, 28A Eighth Brick
DC/DC Converters
Input
Input Voltage Range
10.2-13.8 Volts (12V nominal)
Input Current:
Normal Operating Conditions
See Ordering Guide
Inrush Transient
TBD
Standby/Off Mode
3.5mA
Output Short-Circuit Condition
130mA
Input Reected Ripple Current
20mAp-p
Input Filter Type
Capacitive (66μF)
Overvoltage Protection
14.3 Volts
Reverse-Polarity Protection
None
Undervoltage Shutdown
9.4 Volts
On/Off Control
On = open or 0 to +0.4V
Off = +2.8V to +VIN (<3mA)
Output
VOUT Accuracy (50% load)
±1.5% maximum
Minimum Loading
No load
Maximum Capacitive Load
10,000μF (low ESR, OSCON)
VOUT Trim Range
±10% for VOUT =
≥1.8V
+10%/–3% for VOUT 1.5V and lower
(no trim for 0.8V models)
Ripple/Noise (20MHz BW)
See Ordering Guide
Total Accuracy
3% over line/load temperature
Efciency
See Ordering Guide
Overcurrent Detection and Short-Circuit Protection:
Current-Limiting Detection Point
35 Amps
Short-Circuit Detection Point
98% of VOUT set
SC Protection Technique
Hiccup with auto recovery
Short-Circuit Current
TBD
Dynamic Characteristics
Transient Response (25% load step) 100μsec to ±2% of nal value
Start-Up Time:
VIN to VOUT and On/Off to VOUT
20ms
Switching Frequency
320kHz ±40kHz
Environmental
Calculated MTBF
TBD million hours
Operating Temperature: (Ambient)
Without Derating (With 200 lfm)
–40 to +65°C (model dependent)
With Derating
See Derating Curves
Thermal Shutdown
+125°C
Physical
Dimensions
See Mechanical Dimensions
Pin Material
Gold-plated copper alloy with nickel underplate
Weight
0.6 ounces (17g)
Flamability Rating
UL94V-0
Performance/Functional Specications
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted.
All models are tested and specied with external 33μF tantalum input and output capacitors.
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.
Input Ripple Current is tested/specied over a 5-20MHz bandwidth with an external 33μF input
capacitor and a simulated source impedance of 220μF and 12μH. See I/O Filtering, Input Ripple
Current and Output Noise for details.
The On/Off Control (pin 4) is designed to be driven with open-collector logic or the application of
appropriate voltages (referenced to Common, pins 1, 6 and 8).
Output noise may be further reduced with the installation of additional external output ltering.
See I/O Filtering and Noise Reduction.
MTBF’s are calculated using Telcordia SR-332(Bellcore), ground xed, TA = +25°C, full power,
natural convection, TBD pcb temperature.
See Performance Specications, note 6.
Input Voltage:
Continuous or transient
15.5 Volts
On/Off Control (Pin 11)
+VIN
Input Reverse-Polarity Protection
None
Output Overvoltage Protection
VOUT +20%
Output Current
Current limited. Devices can
withstand sustained output
short circuits without damage.
Storage Temperature
–55 to +125°C
Lead Temperature (soldering, 10 sec.)
+300°C
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in the
Performance/Functional Specications Table is not implied.
Absolute Maximum Ratings
Return Current Paths
The LEN D12 are non-isolated DC/DC converters. Their Common pins (pins 1,
6 and 8) are connected to each other internally (see Figure 1). To the extent
possible (with the intent of minimizing ground loops), input return current
should be directed through pin 1 (also referred to as –Input or Input Return),
and output return current should be directed through pin 6 and 8 (also referred
to as –Output or Output Return). Any on/off control signals applied to pin 4
(On/Off Control) should be referenced to Common (specically pin 1).
I/O Filtering and Noise Reduction
All models in the LEN D12 Series are tested and specied with external 33μF
tantalum input and output capacitors. These capacitors are necessary to
accommodate our test equipment and may not be required to achieve desired
performance in your application. The LEN D12s are designed with high-quality,
high-performance internal I/O caps, and will operate within spec in most applica-
tions with no additional external components.
In particular, the LEN D12’s input capacitors are specied for low ESR and
are fully rated to handle the units' input ripple currents. Similarly, the internal
output capacitors are specied for low ESR and full-range frequency response.
As shown in the Performance Curves, removal of the external 33μF tantalum
output caps has minimal effect on output noise.
In critical applications, input/output ripple/noise may be further reduced using
ltering techniques, the simplest being the installation of external I/O caps.
External input capacitors serve primarily as energy-storage devices. They
minimize high-frequency variations in input voltage (usually caused by IR
drops in conductors leading to the DC/DC) as the switching converter draws
pulses of current. Input capacitors should be selected for bulk capacitance
(at appropriate frequencies), low ESR, and high rms-ripple-current ratings. The
switching nature of modern DC/DCs requires that the dc input voltage source
have low ac impedance and the frequencies of interest. Highly inductive
source impedances can greatly affect system stability. Your specic system
conguration may necessitate additional considerations.
TECHNICAL NOTES
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| LEN-3.3/28-D12 | 制造商:Murata Power Solutions 功能描述:Module DC-DC 1-OUT 3.3V 28A 10-Pin Case C44 |
| LEN-3.3/28-D12B-C | 功能描述:DC/DC轉(zhuǎn)換器 90W 12Vto3.3V 28A 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: |
| LEN-3.3/28-D12-C | 功能描述:DC/DC轉(zhuǎn)換器 90W 12Vto3.3V 28A 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: |
| LEN-3.3/28-D12H-C | 功能描述:DC/DC轉(zhuǎn)換器 90W 12Vto3.3V 28A HEAT SINK 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: |
| LEN-3.3/28-D12MB-C | 功能描述:DC/DC轉(zhuǎn)換器 90W 12Vto3.3V 28A SURFACE MOUNT 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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