參數(shù)資料
型號(hào)： L6730TR
廠商： 意法半導(dǎo)體
英文描述： Adjustable step-down controller with synchronous rectification
中文描述： 可調(diào)式降壓同步整流控制器
文件頁(yè)數(shù)： 36/52頁(yè)
文件大小： 1370K
代理商： L6730TR
Application details
L6730 - L6730B
36/52
●
Compensation network design:
–
Put the gain R
5
/R
3
in order to obtain the desired converter bandwidth
–
Place
ω
Z1
before the output filter resonance
ω
LC
;
Place
ω
Z2
at the output filter resonance
ω
LC
;
Place
ω
P1
at the output capacitor ESR zero
ω
ESR
;
Place
ω
P2
at one half of the switching frequency;
Check the loop gain considering the error amplifier open loop gain.
–
–
–
–
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 30.
). 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 I
OUT
to 0A with a slew rate sufficiently greater
than L/V
OUT
(where L is the inductor value). Even considering that the converter reacts
instantaneously setting to 0% the duty-cycle, the energy *L*I
OUT2
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 29. Asymptotic Bode plot of Converter's open loop gain
LC
C
Vosc
Vin
R
R
=
3
5
(18)
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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(lèi)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(lèi)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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