參數(shù)資料
型號(hào)： L6730TR
廠商： STMICROELECTRONICS
元件分類： 穩(wěn)壓器
英文描述： 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
封裝： HTSSOP-20
文件頁(yè)數(shù)： 31/52頁(yè)
文件大?。?/td> 1569K
代理商： L6730TR
L6730 - L6730B
Application details
Doc ID 11938 Rev 3
37/52
6.5
Two quadrant or one quadrant operation mode (L6730)
After the soft-start phase the L6730 can work in source only (one quadrant operation mode)
or in sink/source (two quadrant operation mode), depending on the setting of the
multifunction pin (see Chapter 5.10 on page 27). The choice of one or two quadrant
operation mode is related to the application. One quadrant operation mode permits to have
a higher efficiency at light load, because the converter works in discontinuous mode (see
Figure 31). Nevertheless in some cases, in order to maintain a constant switching
frequency, it’s preferable to work in two quadrants, even at light load. In this way the
reduction of the switching frequency due to the pulse skipping is avoided. To parallel two or
more modules is requested the one quadrant operation in order not to have current sinking
between different converters. Finally the two quadrant operation allows faster recovers after
negative load transient. For example, let’s consider that the load current falls down from IOUT
to 0A with a slew rate sufficiently greater than L/VOUT (where L is the inductor value). Even
considering that the converter reacts instantaneously setting to 0% the duty-cycle, the
energy *L*IOUT
2 stored in the inductor will be transferred to the output capacitors,
increasing the output voltage. If the converter can sink current this overvoltage can be faster
eliminated.
Figure 31.
Efficiency in discontinuous-current-mode and continuous-current-mode
EFFICIENCY: DCM vs. CCM
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
OUTPUT CURRENT (A)
EF
F
.(
%
EFFICIENCY DCM
EFFICIENCY CCM
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6731B 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Adj. Step-Down w/ Synch Rectification RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開(kāi)關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel
L6731BTR 功能描述:IC CTRLR ADJ STEP DOWN 16-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR)
L6731D 功能描述:DC/DC 開(kāi)關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
L6731DTR 功能描述:DC/DC 開(kāi)關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
L6732 功能描述:DC/DC 開(kāi)關(guān)控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
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