參數(shù)資料
型號(hào)： TPS5401DGQT
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝： PLASTIC, MSOP-10
文件頁(yè)數(shù)： 16/41頁(yè)
文件大?。?/td> 1149K
代理商： TPS5401DGQT
+
www.ti.com
SLVSAB0 – DECEMBER 2010
APPLICATION INFORMATION
Typical Application
The TPS5401 is good for the E-meter application. The power supply design is a challenge work to E-meter
designers because it must get enough output current from a wide input voltage range with a limited input power.
For example, in China, a single-phase or three-phase E-meter must work properly with an input AC electricity
voltage range from 0.7 Un to 1.9 Un. Here Un is the phase voltage of 220 V. The input active power limit is 1.5
W. A typical power supply design uses a transformer followed by a rectifier bridge to get a low unregulated dc
voltage. Then a voltage regulator generates 5 V for the whole system. Considering the ac transformer has large
internal dc resistance and the following rectifier has a voltage drop, the output voltage of the rectifier circuit is
different between empty load and heavy load. So the input voltage for the voltage regulator within the whole ac
input voltage range may have a maximum-to-minimum ratio of 4. In this situation, a linear regulator is not suitable
due to its very low efficiency at high input voltage.
Figure 40 shows a typical TPS5401 application schematic for this requirement. The input range is set to 7.5 V to
35 V. With such a wide input voltage range, an inexpensive transformer with high dc resistance can be used to
save total cost.
Figure 40. Typical Application Schematic
Step-by-Step Design Procedure
The following design procedure can be used to select component values for the TPS5401. Alternately, the
SwitcherPro software may be used to generate a complete design. The SwitcherPro software uses an iterative
design procedure and accesses a comprehensive database of components when generating a design. This
section presents a simplified discussion of the design process. To begin the design process, a few parameters
must be decided upon. Table 3 lists the parameters the designer needs to know.
Table 3.
DESIGN PARAMETER
EXAMPLE VALUE
Input voltage range
7.5 V to 35 V
Output voltage
5 V
Input ripple voltage
300 mV
Output ripple voltage
1% of VOUT
Output transient response for 0 to 500-mA load step 4% of VOUT
Maximum output current
500 mA
Copyright 2010, Texas Instruments Incorporated
23
Product Folder Link(s): TPS5401
相關(guān)PDF資料
PDF描述
TPS60121PWP 0.2 A SWITCHED CAPACITOR REGULATOR, 450 kHz SWITCHING FREQ-MAX, PDSO20
TRU050-GACCA49.152-24.576 PHASE LOCKED LOOP, CDSO16
TRU050-GACHA20.480-10.240 PHASE LOCKED LOOP, CDSO16
TRU050-GACHA41.943-20.9715 PHASE LOCKED LOOP, CDSO16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS5401EVM-708 功能描述:電源管理IC開(kāi)發(fā)工具 Eval Mod for TPS5401 RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS5402 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:3.5-V TO 28-V INPUT VOLTAGE, 1.7-A OUTPUT CURRENT, NON-SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED MOSFET
TPS54020 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:4.5V to 17V Input, 10A Synchronous Step-Down SWIFTa?￠ Converter With Full Feature Set
TPS54020_13 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Small, 10-A, 4.5-V to 17-V Input, SWIFT Synchronous Step-Down Converter with Light-Load Efficiency
TPS54020EVM-082 功能描述:電源管理IC開(kāi)發(fā)工具 TPS54020 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
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