參數(shù)資料
型號(hào)： PTN78060WAD
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT, DIP-7
文件頁(yè)數(shù)： 9/28頁(yè)
文件大小： 1948K
代理商： PTN78060WAD
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.
17
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTN78060WAH 功能描述:DC/DC轉(zhuǎn)換器 3-A Wide-Input Adj Swtch Reg Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTN78060WAH 制造商:Texas Instruments 功能描述:IC SWITCHING REG 3A ADJ 8060 制造商:Texas Instruments 功能描述:IC, SWITCHING REG 3A ADJ, 8060 制造商:Texas Instruments 功能描述:IC, SWITCHING REG 3A ADJ, 8060; Primary Input Voltage:36V; No. of Outputs:1; Output Voltage:12.6V; Output Current:3A; Voltage Regulator Case Style:SIP Module; No. of Pins:7; Operating Temperature Min:-40C; Operating Temperature ;RoHS Compliant: Yes
PTN78060WAS 功能描述:DC/DC轉(zhuǎn)換器 3-A Wide-Input Adj Swtch Reg Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTN78060WAST 功能描述:DC/DC轉(zhuǎn)換器 3-A Wide-Input Adj Swtch Reg Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTN78060WAZ 功能描述:DC/DC轉(zhuǎn)換器 3-A Wide-Input Adj Swtch Reg Mod RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
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