參數(shù)資料
型號(hào)： PTH04T240FAST
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封裝： DIP-11
文件頁(yè)數(shù)： 11/35頁(yè)
文件大?。?/td> 3835K
代理商： PTH04T240FAST
UNDERVOLTAGE LOCKOUT (UVLO)
R
UVLO +
68.54 * VTHD
V
THD * 2.07
kW
(4)
V
I
Inhibit/
UVLO Prog
GND
PTH04T240F
3
2
R
UVLO
C
I
11
4
+
GND
UDG-08161
V
I
www.ti.com ............................................................................................................................................... SLTS293A – DECEMBER 2008 – REVISED MARCH 2009
The PTH04T240F power modules incorporate an input undervoltage lockout (UVLO). The UVLO feature
prevents the operation of the module until there is sufficient input voltage to produce a valid output voltage. This
enables the module to provide a clean, monotonic powerup for the load circuit, and also limits the magnitude of
current drawn from the regulator input source during the power-up sequence.
The UVLO characteristic is defined by the ON threshold (VTHD) voltage. Below the ON threshold, the Inhibit
control is overridden, and the module does not produce an output. The hysteresis voltage, which is the difference
between the ON and OFF threshold voltages, is set at 500 mV. The hysteresis prevents start-up oscillations,
which can occur if the input voltage droops slightly when the module begins drawing current from the input
source.
The UVLO feature of the PTH04T240F module allows for limited adjustment of the ON threshold voltage. The
adjustment is made via the Inhbit/UVLO Prog control pin (pin 11) using a single resistor (see Figure 16). When
pin 11 is left open circuit, the ON threshold voltage is internally set to the 1.95-V default value. The ON threshold
might need to be raised if the module is powered from a tightly regulated 5-V bus. Adjusting the threshold
prevents the module from operating if the input bus fails to completely rise to its specified regulation voltage.
Equation 4 determines the value of RUVLO required to adjust VTHD to a new value. The default value is 1.95 V,
and it may be adjusted to a higher value only.
Table 6 lists the standard resistor values for RUVLO for different values of the on-threshold (VTHD) voltage.
Table 6. Standard RUVLO values for Various VTHD values
VTHD(V)
2.5
3.0
3.5
4.0
4.5
RUVLO (kΩ)
154
71.5
53.6
33.2
26.7
Figure 16. Undervoltage Lockout Adjustment Resistor Placement
Copyright 2008–2009, Texas Instruments Incorporated
19
Product Folder Link(s): PTH04T240F
相關(guān)PDF資料
PDF描述
PTH04T240WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T241WAZ 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T241WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T240WAZT 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T240WAS 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH04T240FAZ 功能描述:DC/DC轉(zhuǎn)換器 10A,2.2V-5.5V Inp Pwr 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(chēng)）: 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:
PTH04T240FAZT 功能描述:DC/DC轉(zhuǎn)換器 10A,2.2V-5.5V Inp Pwr 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(chēng)）: 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:
PTH04T240W 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:10-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS⑩
PTH04T240WAD 功能描述:DC/DC轉(zhuǎn)換器 10-A 2.2V to 5.5V Adj Pwr 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(chēng)）: 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:
PTH04T240WAS 功能描述:DC/DC轉(zhuǎn)換器 10-A 2.2V to 5.5V Adj Pwr 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(chēng)）: 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:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*