參數(shù)資料
型號(hào)： PTH12030LAST
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： DIP-13
文件頁(yè)數(shù)： 5/26頁(yè)
文件大?。?/td> 794K
代理商： PTH12030LAST
SOFT-START POWER UP
12V
C
1000 F
I
m
+
C
330 F
O
m
+
GND
3.3V
R
2k
0.1W
1%
SET
W
PTH12020W
7
10
4
5
6
2
3
9
Track
V
I
V
O
GND
Inhibit
1
Up Dn
Adjust
8
Sense
VI (5 V/div)
t Time 5 ms/div
VO (1 V/div)
II (5 V/div)
OVERCURRENT PROTECTION
OVERTEMPERATURE PROTECTION (OTP)
www.ti.com .................................................................................................................................................... SLTS211H – MAY 2003 – REVISED DECEMBER 2008
The Auto-Track feature allows the power-up of multiple PTH modules to be directly controlled from the Track pin.
However, in a stand-alone configuration, or when the Auto-Track feature is not being used, the Track pin should
be directly connected to the input voltage, VI, see Figure 11.
When the Track pin is connected to the input voltage the Auto-Track function is permanently disengaged. This
allows the module to power up entirely under the control of its internal soft-start circuitry. When power up is
under soft-start control, the output voltage rises to the set-point at a quicker and more linear rate.
Figure 11. Power-Up Application Circuit
Figure 12. Power-Up Waveforms
From the moment a valid input voltage is applied, the soft-start control introduces a short time delay (typically
8 ms-15 ms) before allowing the output voltage to rise. The output then progressively rises to the module’s
setpoint voltage. Figure 12 shows the soft-start power-up characteristic of the 18-A output product
(PTH12020W), operating from a 12-V input bus and configured for a 3.3-V output. The waveforms were
measured with a 5-A resistive load and the Auto-Track feature disabled. The initial rise in input current when the
input voltage first starts to rise is the charge current drawn by the input capacitors. Power-up is complete within
25 ms.
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 power-up. 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.
The PTH12020W and PTH12030W products have overtemperature protection. These products have 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 internally 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 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.
Copyright 2003–2008, Texas Instruments Incorporated
13
Product Folder Link(s): PTH12030W/L
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PTH12030LAZ 功能描述:DC/DC轉(zhuǎn)換器 10.2-13.8Vin 1.8V26A 1.370" x1.120"x0.354 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:
PTH12030LAZT 功能描述:DC/DC轉(zhuǎn)換器 0.8 to 1.8V 26A 12V Input WideAdj Module 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:
PTH12030W 制造商:未知廠家 制造商全稱:未知廠家 功能描述:26 A. 12-V Input Wide-Output Adjust Plug-in Power Module
PTH12030WAD 功能描述:DC/DC轉(zhuǎn)換器 1.2 to 5.5V 26A 12V Input WideAdj Module 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:
PTH12030WADT 制造商:EMERSON-NETWORKPOWER 制造商全稱:Emerson Network Power 功能描述:DC-DC CONVERTERS
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