參數(shù)資料
型號(hào)： TPS54240DGQ
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10
封裝： GREEN, PLASTIC, MSOP-10
文件頁數(shù)： 8/48頁
文件大?。?/td> 1759K
代理商： TPS54240DGQ
SS /TR
TPS54240
EN
PWRGD
SS /TR
EN
PWRGD
EN1
PWRGD1
VOUT1
VOUT2
SLVSAA6 – APRIL 2010
www.ti.com
DETAILED DESCRIPTION (continued)
Overload Recovery Circuit
The TPS54240 has an overload recovery (OLR) circuit. The OLR circuit will slow start the output from the
overload voltage to the nominal regulation voltage once the fault condition is removed. The OLR circuit will
discharge the SS/TR pin to a voltage slightly greater than the VSENSE pin voltage using an internal pull down of
382mA when the error amplifier is changed to a high voltage from a fault condition. When the fault condition is
removed, the output will slow start from the fault voltage to nominal output voltage.
Sequencing
Many of the common power supply sequencing methods can be implemented using the SS/TR, EN and PWRGD
pins. The sequential method can be implemented using an open drain output of a power on reset pin of another
device. The sequential method is illustrated in Figure 30 using two TPS54240 devices. The power good is
coupled to the EN pin on the TPS54240 which will enable the second power supply once the primary supply
reaches regulation. If needed, a 1nF ceramic capacitor on the EN pin of the second power supply will provide a
1ms start up delay. Figure 31 shows the results of Figure 30.
Figure 30. Schematic for Sequential Start-Up
Figure 31. Sequential Startup using EN and
Sequence
PWRGD
16
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS54240
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS54240DGQ 制造商:Texas Instruments 功能描述:IC STEP-DOWN DC/DC CONVERTER MSOP-10
TPS54240DGQR 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.5-42V Inp,2.5A,2.5 MHz SWIFT Converter 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
TPS54240DRCR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.5-42Vin,2.5A SD Converter 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
TPS54240DRCT 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3.5-42Vin,2.5A SD Converter 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
TPS54240EVM-605 功能描述:電源管理IC開發(fā)工具 2.5A SWIFT Converter 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
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