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參數(shù)資料
| 型號(hào)： | PT3406 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | "1.2V 16A |
| 中文描述： | 1.2V 16A 輸出 48V 輸入的隔離 DC/DC 轉(zhuǎn)換器 |
| 文件頁數(shù)： | 6/13頁 |
| 文件大小： | 284K |
| 代理商： | PT3406 |
For technical support and more information, see inside back cover or visit www.ti.com
Operating Features of the PT3400 Series
of Isolated DC/DC Converters
Under-Voltage Lockout
An Under-Voltage Lock-Out (UVLO) inhibits the opera-
tion of the converter until the input voltage is above the
UVLO threshold (see the data sheet specification). Below
this voltage, the module’s output is held off, irrespective
of the state of either the
EN1
&
EN2
enable controls.
The UVLO allows the module to produce a clean transi-
tion during both power-up and power-down, even when
the input voltage is rising or falling slowly. It also reduces
the high start-up current during normal power-up of the
converter, and minimizes the current drain from the
input source during low-input voltage conditions. The
UVLO threshold includes about 1V of hysteresis.
If
EN2
(pin 2) is connected to
-V
in
(pin 3) and
EN1
(pin 1)
is left open, the module will automatically power up when
the input voltage rises above the UVLO threshold (see
data sheet ‘Standard Application’ schematic). Once
operational, the converter will conform to its operating
specifications when the minimum specified input voltage
is reached.
Over-Current Protection
To protect against load faults, the PT3400 series incor-
porates output over-current protection. Applying a load
that exceeds the converter’s over-current threshold (see
applicable specification) will cause the regulated output
to shut down. Following shutdown the module will peri-
odically attempt to automatically recover by initiating a
soft-start power-up. This is often described as a “hiccup”
mode of operation, whereby the module continues in the
cycle of succesive shutdown and power up until the load
fault is removed. Once the fault is removed, the converter
then automatically recovers and returns to normal op-
eration.
Primary-Secondary Isolation
Electrical isolation is provided between the input termi-
nals (primary) and the output terminals (secondary). All
converters are production tested to a primary-secondary
withstand voltage of 1500VDC. This specification com-
plies with UL60950 and EN60950 and the requirements
for operational isolation. Operational isolation allows these
converters to be configured for either a positive or negative
input voltage source. The data sheet ‘Pin-Out Information’
uses shading to indicate which pins are associated with the
primary. They include pins 1 through 4, inclusive.
Input Current Limiting
The converter is not internally fused.
For safety and
overall system protection, the maximum input current to
the converter must be limited. Active or passive current
limiting can be used. Passive current limiting can be a
fast acting fuse. A 125-V fuse, rated no more than 5A, is
recommended. Active current limiting can be imple-
mented with a current limited “Hot-Swap” controller.
Thermal Considerations
Airflow may be necessary to ensure that the module can
supply the desired load current in environments with
elevated ambient temperatures. The required airflow
rate may be determined from the Safe Operating Area
(SOA) thermal derating chart (see converter specifica-
tions). The recommended direction for airflow is into the
longest side of the module’s metal case. See Figure 1-1.
Figure 1-1
PT3400 Series
Recommended direction for airflow is
into (perpendicular to) the longest side
Application Notes
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| PT360F | COMPACT TYPE PHOTOTRANSISTOR |
| PT3661 | 30-A Dual Output Isolated DC/DC Converter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT3406A | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1.2V 16A 48-V Input Iso DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT3406C | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1.2V 16A 48-V Input Iso DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT3406N | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1.2V 16A 48-V Input Iso DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT3407 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:35-W 48-V Input Isolated DC/DC Converter |
| PT3407A | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 1.0V 16A 48-V Input Iso DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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