參數(shù)資料
型號(hào)： L6730
廠商： STMICROELECTRONICS
元件分類(lèi)： 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： L6730
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
PDF描述
L6730B 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
L6730TR 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20
L6732CTR 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6732 SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6732TR SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6730_09 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
L6730B 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
L6730BTR 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
L6730C 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:100% 電源電壓:8.2 V ~ 30 V 降壓:無(wú) 升壓:無(wú) 回掃:是 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:是 工作溫度:0°C ~ 70°C 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 產(chǎn)品目錄頁(yè)面:1316 (CN2011-ZH PDF)
L6730CQ 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification
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