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參數(shù)資料
| 型號(hào)： | L6730C |
| 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 |
| 文件頁數(shù)： | 34/50頁 |
| 文件大?。?/td> | 1394K |
| 代理商： | L6730C |
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Application details
L6730C - L6730D
34/50
6.5
Two quadrant or one quadrant operation mode (L6730C)
After the soft-start phase the L6730C 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 25
). 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 28.
). 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 28. 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)
E
EFFICIENCY DCM
EFFICIENCY CCM
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L6730CQTR | Adjustable step-down controller with synchronous rectification |
| L6730CTR | Adjustable step-down controller with synchronous rectification |
| L6730D | Adjustable step-down controller with synchronous rectification |
| L6730DTR | Adjustable step-down controller with synchronous rectification |
| L6730 | Adjustable step-down controller with synchronous rectification |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6730CQ | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6730CQTR | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6730CTR | 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別: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 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 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)品目錄頁面:1316 (CN2011-ZH PDF) |
| L6730D | 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別: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 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 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)品目錄頁面:1316 (CN2011-ZH PDF) |
| L6730DTR | 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 類別: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 升壓:無 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 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)品目錄頁面:1316 (CN2011-ZH PDF) |
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