參數(shù)資料
型號： TPS62400QDRCQ1
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, PDSO10
封裝： 3 X3 MM, PLASTIC, SON-10
文件頁數(shù)： 25/41頁
文件大?。?/td> 1319K
代理商： TPS62400QDRCQ1
600 mA
400 mA
3.3 H
10 F
Vout 1 : 1 .575V
Vout 2 : 2 .8V
SW 1
FB 1
SW 2
ADJ 2
DEF _ 1
10 F
10 m F
VIN 2.5V – 6V
VIN
EN _ 1
EN _ 2
MODE/
DATA
TPS62403
GND
2.2 H
DIL + Vout
1 *
Vout
Vin
L
I
Lmax + Ioutmax )
DIL
2
TPS62400-Q1, TPS62401-Q1
TPS62402-Q1, TPS62403-Q1
www.ti.com
SLVSA67 – FEBRUARY 2010
Figure 46. TPS62403 1.575V/2.8V Outputs
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
The converters are designed to operate with a minimum inductance of 1.75mH and minimum capacitance of 6mF.
The device is optimized to operate with inductors of 2.2mH to 4.7mH and output capacitors of 10mF to 22mF.
Inductor selection
The selected inductor has to be rated for its DC resistance and saturation current. The DC resistance of the
inductor will influence directly the efficiency of the converter. Therefore an inductor with lowest DC resistance
should be selected for highest efficiency.
Equation 6 calculates the maximum inductor current under static load conditions. The saturation current of the
inductor should be rated higher than the maximum inductor current as calculated with Equation 7. This is
recommended because during heavy load transient the inductor current rises above the calculated value.
(6)
(7)
with:
f = Switching Frequency (2.25MHz typical)
L = Inductor Value
ΔIL = Peak-to-Peak inductor ripple current
ILmax = Maximum Inductor current
The highest inductor current occurs at maximum Vin.
Open core inductors have a soft saturation characteristic and they can usually handle higher inductor currents
versus a comparable shielded inductor.
A more conservative approach is to select the inductor current rating just for the maximum switch current of the
corresponding converter. Take into consideration that the core material from inductor to inductor differs and this
difference has an impact on the efficiency.
Refer to Table 7 and the typical application circuit examples for possible inductors.
Copyright 2010, Texas Instruments Incorporated
31
Product Folder Link(s) :TPS62404-Q1
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62400QDRCRQ1 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 AC Dual Adj SD Cnvtr RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
TPS62401DRCR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Dual 400mA & 600mA 2.25MHz St-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62401DRCRG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Dual 400mA & 600mA 2.25MHz St-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62401DRCT 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Dual 400mA and 600mA 2.25MHz Step-Dwn RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS62401DRCTG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Dual 400mA & 600mA 2.25MHz St-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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