參數(shù)資料
型號(hào)： TPS65055RSMR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 1.8 A DUAL SWITCHING CONTROLLER, 2475 kHz SWITCHING FREQ-MAX, PQCC32
封裝： 4 X 4 MM, GREEN, PLASTIC, QFN-32
文件頁(yè)數(shù)： 27/41頁(yè)
文件大小： 1276K
代理商： TPS65055RSMR
APPLICATION INFORMATION
OUTPUT VOLTAGE SETTING
Converter 1 (DCDC1)
Converter 2 (DCDC2)
OUTPUT FILTER DESIGN (INDUCTOR AND OUTPUT CAPACITOR)
Inductor Selection
L
Lmax
outmax
Vout
1-
I
Vin
Formula 1:
I = Vout
(3) I
= I
+
L
2
f
D
www.ti.com.......................................................................................................................................................................................... SLVS844 – SEPTEMBER 2008
The output voltage of converter 1 is set by the status of the DEFLDO pins and the I2C compatible interface.
The output voltage of converter 2 is selected with the DEFDCDC2 pin.
Table 2. Default Fixed Output Voltages
CONVERTER 2
DEFDCDC2 = LOW
DEFDCDC2 = HIGH
TPS65055
1.2 V
1.0 V
The two converters operate typically with 2.2
H output inductors . Larger or smaller inductor values can be used
to optimize the performance of the device for specific operation conditions. The selected inductor has to be rated
for its dc resistance and saturation current. The dc resistance of the inductance influences directly the efficiency
of the converter. Therefore an inductor with the lowest dc resistance should be selected for highest efficiency.
Due to the internal control scheme used, the inductor should have a minimum value of 3.3
H for an output
voltage of 3.0 V or higher.
Formula 1 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 Formula 1. This is
recommended because during heavy load transient the inductor current rises above the calculated value.
With:
f = Switching frequency (2.25 MHz 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. It must be considered, that the core material from inductor to inductor differs and has
an impact on the efficiency especially at high switching frequencies.
Refer to Table 3 and the typical applications for possible inductors.
Table 3. Tested Inductors
INDUCTOR TYPE
INDUCTOR VALUE
SUPPLIER
LPS3010
2.2
H
Coilcraft
VLF3010
2.2
H
TDK
LPS4012
2.2
H
Coilcraft
VLF4012
2.2
H
TDK
Copyright 2008, Texas Instruments Incorporated
33
Product Folder Link(s): TPS65055
相關(guān)PDF資料
PDF描述
TPS65058RGET 1.8 A DUAL SWITCHING CONTROLLER, 2475 kHz SWITCHING FREQ-MAX, PQCC32
TPS650732TRSLRQ1 POWER SUPPLY SUPPORT CKT, PQCC48
TPS65110RGEG3 SWITCHED CAPACITOR REGULATOR, 520 kHz SWITCHING FREQ-MAX, PQCC24
TPS65130RGER 0.9 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC24
TPS65130RGET 0.9 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PQCC24
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS65055RSMRG4 功能描述:PMIC 解決方案 Dual buck w/ 4LDO & I2C RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65055RSMT 功能描述:PMIC 解決方案 Dual buck w/ 4LDO & I2C RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65055RSMTG4 功能描述:PMIC 解決方案 Dual buck w/ 4LDO & I2C RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
TPS65056EVM-195 功能描述:電源管理IC開發(fā)工具 TPS65056 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS65056RSMR 功能描述:PMIC 解決方案 6Ch Pwr Mgmt IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel
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

*
*
*