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参数资料
| 型号： | PT3407N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 16 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 12/15页 |
| 文件大小： | 332K |
| 代理商： | PT3407N |
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 -Vin (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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相关代理商/技术参数 |
参数描述 |
|---|---|
| PT3408 | 制造商:TI 制造商全称:Texas Instruments 功能描述:35-W 48-V Input Isolated DC/DC Converter |
| PT3408A | 功能描述:直流/直流开关转换器 5V 6A 48-V Input Iso DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| PT3408C | 功能描述:DC/DC转换器 5V 6A 48-V Input Iso DC/DC Converter 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: |
| PT3408N | 功能描述:直流/直流开关转换器 5V 6A 48-V Input Iso DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| PT3493 | 制造商:Pulse 功能描述:- Bulk |
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