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参数资料
| 型号： | OKX-T/5-W5N-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 12/13页 |
| 文件大小： | 0K |
| 描述： | DC-DC CONVRT 0.7525-3.6V 5A 5SIP |
| 标准包装： | 300 |
| 系列： | Okami™ OKX-T/5-W5 |
| 类型： | 非隔离（POL） |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 2.4V |
| 电压 - 输入（最大）： | 5.5V |
| Voltage - Output 1： | 0.7525 ~ 3.6 V |
| 电流 - 输出（最大）： | 5A |
| 电源（瓦） - 制造商系列： | 17W |
| 特点： | 具有远程开/关功能和 UVLO |
| 安装类型： | 通孔 |
| 封装/外壳： | 5-SIP 模块 |
| 尺寸/尺寸： | 0.90" L x 0.28" W x 0.40" H（22.9mm x 7.1mm x 10.2mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 95% |
| 电源（瓦特）- 最大： | 18W |
| 其它名称： | 811-2621 |
OKX T/5-W5 Series
Adjustable 5-Amp SIP Non-Isolated DC/DC Converters
Minimum Output Loading Requirements
All models regulate within speci?cation and are stable under no load to full
load conditions. Operation under no load might however slightly increase
output ripple and noise.
Thermal Shutdown
To prevent many over temperature problems and damage, these converters
include thermal shutdown circuitry. If environmental conditions cause the
temperature of the DC/DC’s to rise above the Operating Temperature Range
up to the shutdown temperature, an on-board electronic temperature sensor
will power down the unit. When the temperature decreases below the turn-on
threshold, the converter will automatically restart. There is a small amount of
temperature hysteresis to prevent rapid on/off cycling.
CAUTION: If you operate too close to the thermal limits, the converter may
shut down suddenly without warning. Be sure to thoroughly test your applica-
tion to avoid unplanned thermal shutdown.
Temperature Derating Curves
The graphs in this data sheet illustrate typical operation under a variety of
conditions. The Derating curves show the maximum continuous ambient air
temperature and decreasing maximum output current which is acceptable
under increasing forced air?ow measured in Linear Feet per Minute (“LFM”).
Note that these are AVERAGE measurements. The converter will accept brief
increases in current or reduced air?ow as long as the average is not exceeded.
Note that the temperatures are of the ambient air?ow, not the converter
itself which is obviously running at higher temperature than the outside air.
Also note that very low ?ow rates (below about 25 LFM) are similar to “natural
convection,” that is, not using fan-forced air?ow.
Murata Power Solutions makes Characterization measurements in a closed
cycle wind tunnel with calibrated air?ow. We use both thermocouples and an
infrared camera system to observe thermal performance.
CAUTION: If you routinely or accidentally exceed these Derating guidelines,
the converter may have an unplanned Over Temperature shut down. Also, these
graphs are all collected at slightly above Sea Level altitude. Be sure to reduce
the derating for higher density altitude.
Output Current Limiting
Current limiting inception is de?ned as the point at which full power falls below
the rated tolerance. See the Performance/Functional Speci?cations. Note par-
ticularly that the output current may brie?y rise above its rated value in normal
operation as long as the average output power is not exceeded. This enhances
reliability and continued operation of your application. If the output current is
too high, the converter will enter the short circuit condition.
Remote On/Off Control
The remote On/Off Control can be ordered with either polarity. Please refer to
the Connection Diagram on page 1 for On/Off connections.
Positive polarity models are enabled when the On/Off pin is left open or is
pulled high to +Vin with respect to –Vin. Therefore, the On/Off control can be
disconnected if the converter should always be on. Positive-polarity devices are
disabled when the On/Off is grounded or brought to within a low voltage (see
Speci?cations) with respect to –Vin.
Negative polarity devices are on (enabled) when the On/Off pin is left open
or brought to within a low voltage (see Speci?cations) with respect to –Vin. The
device is off (disabled) when the On/Off is pulled high (see Speci?cations) with
respect to –Vin.
Dynamic control of the On/Off function must sink appropriate signal current
when brought low and withstand appropriate voltage when brought high.
Be aware too that there is a ?nite time in milliseconds (see Speci?cations)
between the time of On/Off Control activation and stable, regulated output. This
time will vary slightly with output load type and current and input conditions.
Output Capacitive Load
These converters do not require external capacitance added to achieve rated
speci?cations. Users should only consider adding capacitance to reduce
switching noise and/or to handle spike current load steps. Install only enough
capacitance to achieve your noise and surge response objectives. Excess external
capacitance may cause regulation problems and possible oscillation or instability.
Proper wiring of the Sense inputs will improve these factors under capacitive load.
The maximum rated output capacitance and ESR speci?cation is given for a
capacitor installed immediately adjacent to the converter. Any extended output
wiring, smaller wire gauge or less ground plane may tolerate somewhat higher
capacitance. Also, capacitors with higher ESR may use a larger capacitance.
Pre-Biased Startup
Some sections have external power already partially applied (possibly because
of earlier power sequencing) before POL power up. Or leakage power is pres-
ent so that the DC/DC converter must power up into an existing output voltage.
This power may either be stored in an external bypass capacitor or supplied by
an active source. These converters include a pre-bias startup mode to prevent
initialization problems.
This “pre-biased” condition can also occur with some types of program-
mable logic or because of blocking diode leakage or small currents passed
through forward biased ESD diodes. This feature is variously called “mono-
tonic” because the voltage does not decay or produce a negative transient
once the input power is applied and startup begins.
Output Short Circuit Condition
When a converter is in current-limit mode, the output voltage will drop as the
output current demand increases. If the output voltage drops too low (approxi-
mately 98% of nominal output voltage for most models), the PWM controller
will shut down. Following a time-out period, the PWM will restart, causing the
output voltage to begin ramping up to its appropriate value. If the short-circuit
condition persists, another shutdown cycle will initiate. This rapid on/off cycling
is called “hiccup mode”. The hiccup cycling reduces the average output cur-
rent, thereby preventing excessive internal temperatures and/or component
damage. A short circuit can be tolerated inde?nitely.
www.murata-ps.com/support
MDC_OKX_T/5-W5 Series.A02 Page 12 of 13
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| OKY2-T/10-D12N-C | 功能描述:DC/DC转换器 12Vin 0.7525-5.5Vout 10A 50W seq/track RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| OKY2-T/10-D12P-C | 功能描述:DC/DC转换器 12Vin 0.7525-5.5Vout 10A 50W seq/track RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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