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参数资料
| 型号： | PTN78060HAH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | DIP-7 |
| 文件页数： | 9/28页 |
| 文件大小： | 1948K |
| 代理商： | PTN78060HAH |
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www.ti.com
t - Time = 5 ms/div
II (2 A/div)
VO (2 V/div)
VI (5 V/div)
Undervoltage Lockout
Current Limit Protection
Overtemperature Protection
Output Voltage Sense
PTN78060W, PTN78060H
SLTS229A – NOVEMBER 2004 – REVISED APRIL 2005
Figure 29. Power-Up Waveforms
The undervoltage lockout (UVLO) circuit prevents the module from attempting to power up until the input voltage
is above the UVLO threshold. This is to prevent the modulte from drawing excessive current from the input
source at power up. Below the UVLO threshold, the module is held off.
The module is protected against load faults with a continuous current limit characteristic. Under a load-fault
condition, the output current increases to the current limit threshold. Attempting to draw current that exceeds the
current limit threshold causes the module to progressively reduce its output voltage. Current is continuously
supplied to the fault until the fault is removed. Once it is removed, the output voltage promptly recovers. When
limiting output current, the regulator experiences higher power dissipation, which increases its temperature. If the
temperature increase is excessive, the module overtemperature protection begins to periodically turn the output
voltage off.
A thermal shutdown mechanism protects the module's internal circuitry against excessively high temperatures. A
rise in temperature may be the result of a drop in airflow, a high ambient temperature, or a sustained current limit
condition. If the internal temperature rises excessively, the module turns itself off, reducing the output voltage to
zero. The module excercises a soft-start power up when the sensed temperature has decreased by about 10
° C
below the trip point.
NOTE: Overtemperature protection is a last resort mechanism to prevent damage to the module. It should not be
relied on as permanent protection against thermal stress. Always operate the module within its temperature
derated limits, for the worst-case operating conditions of output current, ambient temperature, and airflow.
Operating the module above these limits, albeit below the thermal shutdown temperature, reduces the long-term
reliability of the module.
An external voltage sense improves the load regulation performance of the module by enabling it to compensate
for any IR-voltage drop between the module and the load circuit. This voltage drop is caused by the flow of
current through the resistance in the printed-circuit board connections.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PTN78060HAH | 制造商:Texas Instruments 功能描述:ISR HORIZONTAL 3A ADJ O/P 78060 |
| PTN78060HAH | 制造商:Texas Instruments 功能描述:DC-DC CONV LINEAR REG 1 O/P 45W 3A 制造商:Texas Instruments 功能描述:DC-DC CONV, LINEAR REG, 1 O/P, 45W, 3A |
| PTN78060HAS | 功能描述:DC/DC转换器 3A Wide-In Wide Output Adj Module 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: |
| PTN78060HAST | 功能描述:DC/DC转换器 3A Wide-In Wide Output Adj Module 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: |
| PTN78060HAZ | 功能描述:DC/DC转换器 3A Wide-In Wide Output Adj Module 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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