參數(shù)資料
型號(hào)： PTH05050WAD
廠(chǎng)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： ROHS COMPLIANT PACKAGE-6
文件頁(yè)數(shù)： 5/24頁(yè)
文件大小： 1147K
代理商： PTH05050WAD
Output On/Off Inhibit
Vo (2V/Div)
Iin (2A/Div)
Q1Vds (5V/Div)
10 ms/div
PTH05020W
V IN
1
10
4
5
6
2
3
CIN
1,000
F
+
COUT
330
F
+
1 =Inhibit
GND
V OUT
9
Vo Sense
8
Q1
BSS138
RSET
7
L
O
A
D
GND
Auto-Track Function
www.ti.com............................................................................................................................................................ SLTS213E – MAY 2003 – REVISED MARCH 2009
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 VI with respect to GND.
Figure 8 shows the typical application of the inhibit function. Note the discrete transistor (Q1). The Inhibit control
has its own internal pull-up to Vin potential. The input is not compatible with TTL logic devices. An open-collector
(or open-drain) discrete transistor is recommended for control.
Figure 8.
Figure 9.
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 will execute a soft-start power-up. A regulated output voltage is produced within 20 msec.
Figure 9 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 load.
The Auto-Track function is unique to the PTH/PTV family, and is available with all POLA products. Auto-Track
was designed to simplify the amount of circuitry required to make the output voltage from each module power up
and power down in sequence. The sequencing of two or more supply voltages during power up is a common
requirement for complex mixed-signal applications that use dual-voltage VLSI ICs such as the TMS320 DSP
family, microprocessors, and ASICs.
How Auto-Track Works
Auto-Track works by forcing the module output voltage to follow a voltage presented at the Track control pin(1).
This control range is limited to between 0 V and the module set-point voltage. Once the track-pin voltage is
raised above the set-point voltage, the module output remains at its set-point(2). As an example, if the Track pin
of a 2.5-V regulator is at 1 V, the regulated output is 1 V. If the voltage at the Track pin rises to 3 V, the regulated
output does not go higher than 2.5 V.
Under Auto-Track control, the regulated output from the module follows the voltage at its Track pin on a
volt-for-volt basis. By connecting the Track pin of a number of these modules together, the output voltages follow
a common signal during power up and power down. The control signal can be an externally generated master
ramp waveform, or the output voltage from another power supply circuit(3). For convenience, the Track input
incorporates an internal RC-charge circuit. This operates off the module input voltage to produce a suitable rising
waveform at power up.
Copyright 2003–2009, Texas Instruments Incorporated
13
Product Folder Link(s) :PTH05050W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH05050WADT 制造商:ARTESYN 制造商全稱(chēng):Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated
PTH05050WAH 功能描述:DC/DC轉(zhuǎn)換器 6A 5V-In Wide Adj Module w/Auto-Trk 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:
PTH05050WAH 制造商:POWER TRENDS 功能描述:IC DC/DC 5VIN 6A ADJ O/P 5050
PTH05050WAHT 制造商:ARTESYN 制造商全稱(chēng):Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated
PTH05050WAS 功能描述:DC/DC轉(zhuǎn)換器 21.6W 0.8V-3.6V 6A 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:
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