參數(shù)資料
型號(hào)： PTH04040WAD
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT, DIP-20
文件頁(yè)數(shù)： 7/25頁(yè)
文件大?。?/td> 535K
代理商： PTH04040WAD
V
(2V/Div)
O
I (2 A/Div)
I
Q1Vds(5V/Div)
t-Time=10 msec/Div
PTH05020W
1
10
4
5
6
2
3
+
C
330 F
O
m
C
1,000 F
I
m
+
1=Inhibit
GND
VO
VI
9
V Sense
O
8
Q1
BSS138
RSET
7
L
O
A
D
GND
www.ti.com
SLTS238C – SEPTEMBER 2005 – REVISED JUNE 2010
OVERCURRENT PROTECTION
For protection against load faults, all modules incorporate output overcurrent protection. Applying a load that
exceeds the regulator’s overcurrent threshold causes the regulated output to shut down. Following shutdown, a
module periodically attempts to recover by initiating a soft-start powerup. This is described as a hiccup mode of
operation, whereby the module continues in a cycle of successive shutdown and power up until the load fault is
removed. During this period, the average current flowing into the fault is significantly reduced. Once the fault is
removed, the module automatically recovers and returns to normal operation.
OVERTEMPERATURE PROTECTION (OTP)
Products with a high output current capability (>20 A), incorporate overtemperature protection. This feature is
provided by an on-board temperature sensor that protects the module’s internal circuitry against excessively high
temperatures. A rise in the internal temperature may be the result of a drop in airflow, or a high ambient
temperature. If the internal temperature exceeds the OTP threshold, the module’s Inhibit control is automatically
pulled low. This turns the output off. The output voltage drops as the external output capacitors are discharged
by the load circuit. The recovery is automatic, and begins with a soft-start power up. It occurs when the sensed
temperature decreases by about 10°C below the trip point.
Note: The overtemperature protection is a last resort mechanism to prevent thermal stress to the regulator.
Operation at or close to the thermal shutdown temperature is not recommended, and reduces the long-term
reliability of the module. Always operate the regulator within the specified safe operating area (SOA) limits for
the worst-case conditions of ambient temperature and airflow.
OUTPUT ON/OFF INHIBIT
For applications requiring output voltage on/off control, each series of the PTH family incorporates an output
Inhibit control pin. The inhibit feature can be used wherever there is a requirement for the output voltage from the
regulator to be turned off.
The power modules function normally when the Inhibit pin is left open-circuit, providing a regulated output
whenever a valid source voltage is connected to Vin with respect to GND.
Figure 13 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control
has its own internal pull-up to VI potential. The input is not compatible with TTL logic devices. An open-collector
(or open-drain) discrete transistor is recommended for control.
Figure 13. Inhibit Control Circuit
Figure 14. Power-Up from Inhibit Control
Turning Q1 on applies a low voltage to the Inhibit control and disables the output of the module. If Q1 is then
turned off, the module executes a soft-start powerup. A regulated output voltage is produced within 20 ms.
Figure 14 shows the typical rise in both the output voltage and input current, following the turn-off of Q1. The turn
off of Q1 corresponds to the rise in the waveform, Q1 Vds. The waveforms were measured with a 5-A constant
current load.
Copyright 2005–2010, Texas Instruments Incorporated
15
Product Folder Link(s): PTH04040W
相關(guān)PDF資料
PDF描述
PTH04040WAH 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04070WAZ 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T220WAS 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T220WAZT 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH04T221WAD 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
PTH04040WAH 功能描述:DC/DC轉(zhuǎn)換器 60A 3.3/5V-In Wide Output Adj Pwr Mdl 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:
PTH04040WAS 功能描述:DC/DC轉(zhuǎn)換器 60A 3.3/5V-In Wide Output Adj Pwr Mdl 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:
PTH04040WAST 功能描述:DC/DC轉(zhuǎn)換器 2.95-5.5Vin 0.8-3.6V 60A 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:
PTH04040WAZ 功能描述:DC/DC轉(zhuǎn)換器 60A 3.3/5V-In Wide Output Adj Pwr Mdl 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:
PTH04040WAZT 功能描述:DC/DC轉(zhuǎn)換器 2.95-5.5Vin 0.8-3.6V 2.045" x1.045"x0.357 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:
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

*
*
*