參數(shù)資料
型號(hào)： TPS62026DRC
廠(chǎng)商： Texas Instruments, Inc.
英文描述： 600 mA/1.25 MHz HIGH-EFFICIENCY STEP-DOWN CONVERTER
中文描述： 600 mA/1.25兆赫高效降壓型轉(zhuǎn)換器
文件頁(yè)數(shù)： 14/24頁(yè)
文件大?。?/td> 612K
代理商： TPS62026DRC
www.ti.com
IL
VO
1–
VO
VI
L
(6)
ILmax
IOmax
IL
2
(7)
Output Capacitor Selection
The advanced, fast-response voltage-mode control scheme of the TPS6202x allows the use of small ceramic
capacitors with a typical value of 10 μF and 22 μF without having large output voltage under and overshoots
during heavy load transients. Ceramic capacitors having low ESR values have the lowest output voltage ripple
and are recommended. If required, tantalum capacitors may be used as well. Refer to Table 2 for component
selection. If ceramic output capacitors are used, the capacitor RMS ripple current rating always meets the
application requirements. Just for completeness the RMS ripple current is calculated as:
IRMSCout
VO
1–
VO
VI
L
1
2
3
(8)
TPS62020
TPS62021
TPS62026
SLVS076C–JUNE 2003–REVISED DECEMBER 2004
APPLICATION INFORMATION (continued)
inductor value, increase the output capacitor accordingly. See the application circuits in Figure 17, Figure 18, and
Figure 19. The selected inductor has to be rated for its dc resistance and saturation current. The dc resistance of
the inductance directly influences the efficiency of the converter. Therefore an inductor with the lowest dc
resistance should be selected for highest efficiency. Formula Equation 7 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 Equation 7. This is needed because during heavy load transient the
inductor current rises above the value calculated under Equation 7.
with:
7 = Switching frequency (1.25 MHz typical)
L = Inductor value
I
L
= Peak-to-peak inductor ripple current
I
L
max = Maximum inductor current
The highest inductor current occurs at maximum V
I
.
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 for
the maximum switch current of 1.3 A for the TPS6202x. Keep in mind that core material differs from inductor to
inductor, and this impacts efficiency, especially at high switching frequencies. Refer to Table 1 and the typical
applications and inductors selection.
Table 1. Inductor Selection
INDUCTOR VALUE
10 μH
10 μH
3.3 μH
6.8 μH
DIMENSIONS
COMPONENT SUPPLIER
Coilcraft DO1608C-103
Sumida CDRH4D28-100
Sumida CDRH4D22 3R3
Sumida CMD5D13 6R8
6,6 mm
×
4,75 mm
×
2,92 mm
5,0 mm
×
5,0 mm
×
3,0 mm
5,0 mm
×
5,0 mm
×
2,4 mm
5,8 mm
×
7,4 mm
×
1,5 mm
At nominal load current the device operates in PWM mode and the overall output voltage ripple is the sum of the
voltage spike caused by the output capacitor ESR plus the voltage ripple caused by charging and discharging the
output capacitor:
14
相關(guān)PDF資料
PDF描述
TPS6205 800-mA SYNCHRONOUS STEP-DOWN CONVERTER
TPS63700DRC DC-DC INVERTER
TPS65010RGZ POWER AND BATTERY MANAGEMENT IC FOR Li-ION POWERED SYSTEMS
TPS65011RGZ POWER AND BATTERY MANAGEMENT IC FOR Li-ION POWERED SYSTEMS
TPS65013RGZ POWER AND BATTERY MANAGEMENT IC FOR Li-ION POWERED SYSTEMS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS62026DRCR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 3.3V Out 600mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62026DRCRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 3.3V Out 600mA Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62040DGQ 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Adj 1.2A Hi-Eff Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62040DGQG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Adj 1.2A Hi-Eff Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62040DGQR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Adj 1.2A Hi-Eff Step-Down RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
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(xiě)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(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*