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参数资料
| 型号： | LSN-1.8/10-D5J |
| 厂商： | CD TECHNOLOGIES INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | SIP-10 |
| 文件页数： | 5/11页 |
| 文件大小： | 361K |
| 代理商： | LSN-1.8/10-D5J |
LSN-10A D5 Models
N O N - I S O L A T E D , 1 0 - 3 3 W S I P D C / D C C O N V E R T E R S
3
Input
Input Voltage Range
4.5 to 5.5 Volts (5V nominal)
Input Current:
Normal Operating Conditions
See Ordering Guide
Inrush Transient
0.014A2sec
Standby/Off Mode
3mA
Output Short-Circuit Condition
70mA average
Input Reected Ripple Current
50mAp-p
Input Filter Type
Capacitive (264F)
Overvoltage Protection
None
Reverse-Polarity Protection
None
Undervoltage Shutdown
None
On/Off Control
On = open (internal pulldown)
Off = +2.8V to +VIN (<3mA)
Output
VOUT Accuracy (50% load)
±1% maximum
Minimum Loading
No load
Maximum Capacitive Load
10,000F (electrolytic)
VOUT Trim Range
±10%
Ripple/Noise (20MHz BW)
See Ordering Guide
Total Accurcacy
3% over line/load/temperature
Efciency
See Ordering Guide
Overcurrent Detection and Short-Circuit Protection:
Current-Limiting Detection Point
17 (12.5-22) Amps
Short-Circuit Detection Point
98% of VOUT set
SC Protection Technique
Hiccup with auto recovery
Short-Circuit Current
400mA average
Dynamic Characteristics
Transient Response (50% load step)
50sec to ±2% of nal value
Start-Up Time:
VIN to VOUT
7msec
On/Off to VOUT
6msec
Switching Frequency
300kHz (+40kHz, –50kHz)
Environmental
MTBF: Bellcore, ground xed, TA = +25°C,
full power, natural convection,
+55°C component temperature
2.1 million hours
Operating Temperature: (Ambient)
Without Derating (Natural convection) –40 to +63/71°C (model dependent)
With Derating
See Derating Curves
Thermal Shutdown
+115°C
Physical
Dimensions
See Mechanical Specications
Package
Open-frame, single-in-line (SIP)
Pin Dimensions/Material
0.03" (0.76mm) round copper with
tin-lead plate over nickel underplate
Weight
0.3 ounces (8.5g)
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 22F 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.
See Technical Notes and Performance Curves for details.
The On/Off Control (pin 11) is designed to be driven with open-collector logic or the appli-
cation of appropriate voltages (referenced to Common, pins 5 and 6).
Output noise may be further reduced with the installation of additional external output
ltering. See I/O Filtering and Noise Reduction.
T E C H N I C A L
N O T E S
Input Voltage:
Continuous or transient
7 Volts
On/Off Control (Pin 11)
+VIN
Input Reverse-Polarity Protection
None
Output Overvoltage Protection
None
Output Current
Current limited. Devices can
withstand sustained output short
circuits without damage.
Storage Temperature
–40 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 LSN D5 SIP’s are non-isolated DC/DC converters. Their two Common
pins (pins 5 and 6) 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 6 (also referred to as –Input or
Input Return), and output return current should be directed through pin 5
(also referred to as –Output or Output Return). Any on/off control signals
applied to pin 11 (On/Off Control) should be referenced to Common
(specically pin 6).
I/O Filtering and Noise Reduction
All models in the LSN D5 Series are tested and specied with external 22F
input and output capacitors. These capacitors are necessary to accommodate
our test equipment and may not be required to achieved desired performance
in your application. The LSN D5's 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 LSN D5'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
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/DC's requires that the dc input voltage
source have low ac impedance at the frequencies of interest. Highly inductive
source impedances can greatly affect system stability.Your specic system
conguration may necessitate additional considerations.
Output ripple/noise (also referred to as periodic and random deviations
or PARD) may be reduced below specied limits with the installation of
additional external output capacitors. Output capacitors function as true lter
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