- 您现在的位置：买卖IC网 > PDF目录56778 > 5S5R2.1200LV 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | 5S5R2.1200LV |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 5/6页 |
| 文件大小： | 114K |
| 代理商： | 5S5R2.1200LV |
A
6 Watt LV Single Series DC/DC Converters
2401 Stanwell Drive Concord, California 94520 Ph: 925/687-4411 or 800/542-3355 Fax: 925/687-3333 www.calex.com Email: sales@calex.com
5
3/2001
Applying the Output
Figure 3 shows typical output connections for the LV Single.
In most applications no external output capacitance will be
necessary. Only your normal 1 to 10 F tantalum and 0.001
to 0.1 F ceramic bypass capacitors sprinkled around your
circuit as needed locally are required. Do not add extra output
capacitance and cost to your circuit “Just Because”.
If you feel you must add external output capacitance, do
not use the lowest ESR, biggest value capacitor that you can
find! This can only lead to reduced system performance or
oscillation. See our application note “Understanding Output
Impedance For Optimum Decoupling” for more information.
Figure 3.
The LV Single may be directly connected to your load without any
external components required for most applications. Transient
overvoltage diode D1 may be added for extra protection against
output faults or if the input has the possibility of being shorted to the
load. General Semiconductor or Motorola SA and 1.5KE series
devices provide excellent protection.
Output Power
The available output power of the LV Single is reduced when
operating below 4.6 volts. See the “Low Voltage Power” curve
for more information. In general, from 4.6 to 16 volts full power
is available from the LV Single. Below 4.6 volts input the
available output power is linearly derated from 100% at 4.6
volts to 50% at 3.5 volts. For example a 5S12.500LV is
capable of providing 3 watts of output power at 3.5 volts input.
Ultra Low Noise Output Circuit
The circuit shown in figure 4 can be used to reduce the output
noise to below 10 mV P-P over a 20 MHz bandwidth. Size
inductor L1 appropriately for the maximum expected load
current. All of the ground connections must be as short as
possible back to the CMN pin. The filter should be placed as
close to the LV Single as possible, even if your load is at some
distance from the converter.
Operation With Very Light Loads
The LV Single conserves power when operating at very light
loads by operating in a burst power mode. This may cause the
output noise to increase with a repetition rate of 10’s of
milliseconds. If this causes a problem the LV Single may be
operated with a pre-load of about 5% of it’s full rated power.
The exact value will depend on the external components in
your system.
Dynamic response of the LV Single will degrade when the
unit is operated with less than 25% of full rated power.
L1 = 10H
C1 = 100F / 25V, ALUMINUM
C2 = 10F / 25V, TANTALUM
Figure 4.
This circuit can reduce the output noise to below 10 mV P-P over a
20 MHz bandwidth. Size inductor L1 appropriately for the maximum
expected load current. All of the ground connections must be as
short as possible back to the CMN pin.
Grounding
The input and output sections are fully floating from each
other. They may be operated fully floating or with a common
ground. If the input and output sections are connected either
directly at the converter or at some remote location from the
converter it is suggested that a 1 to 10 F, 0.5 to 5 ohm ESR
capacitor bypass be used directly at the converters output
pins. These capacitors prevent any common mode switching
currents from showing up at the converters output as normal
mode output noise. See “Applying the Output” for more
information on selecting output capacitors.
Also see the CALEX application note “Dealing With
Common Mode Noise” for more information on using common
grounds.
Case Grounding
The case is made from a non-conductive high temperature
plastic material. The case is floating from the input sections.
The input is coupled to the outputs only by the low 300 pF of
isolation capacitance. This low I/O capacitance insures that
any AC common mode noise on the inputs is not coupled to
your output circuits.
Temperature Derating
The LV Single series can operate up to 85°C case temperature
without derating. Case temperature may be roughly calculated
from ambient by knowing that the case temperature rise is
approximately 19°C per package watt dissipated.
For example: If a 12 volt output converter is delivering 4.5
watts with a 5 volt input, at what ambient could it expect to run
with no moving air and no extra heatsinking?
Efficiency of the converter is approximately 74% at 4.5
watts of output power, this leads to an input power of about 6
watts. The case temperature rise would be 6 - 4.5 watts or 1.5
watts
× 19 = 29°C. This number is subtracted from the
maximum case temperature of 85°C to get: 56°C.
相关PDF资料 |
PDF描述 |
|---|---|
| 5S5.2.1200LV | 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
| 5S5.2000LV | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
| 5S3.2000LV | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
| 5S15.800LV | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
| 5S12.1000LV | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 5S71-19-1AA | 制造商:CAMLOC (ALCOA) 功能描述: |
| 5S7-16 | 制造商:CAMLOC (ALCOA) 功能描述: |
| 5S7226V | 制造商:Analog Devices 功能描述: |
| 5S72-5-1AA | 制造商:CAMLOC (ALCOA) 功能描述: |
| 5S76 | 制造商:Fairchild Semiconductor Corporation 功能描述: |
发布紧急采购，3分钟左右您将得到回复。