參數(shù)資料
型號： L6730CQ
廠商： 意法半導體
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)： 26/50頁
文件大?。?/td> 1394K
代理商： L6730CQ
Device description
L6730C - L6730D
26/50
5.11 Synchronization
The presence of many converters on the same board can generate beating frequency noise. To
avoid this it is important to make them operate at the same switching frequency. Moreover, a
phase shift between different modules helps to minimize the RMS current on the common input
capacitors.
Figure 21.
shows the results of two modules in synchronization. Two or more
devices can be synchronized simply connecting together the SYNCH pins. The device with the
higher switching frequency will be the Master while the other one will be the Slave. The Slave
controller will increase its switching frequency reducing the ramp amplitude proportionally and
then the modulator gain will be increased.
To avoid a huge variation of the modulator gain, the best way to synchronize two or more
devices is to make them work at the same switching frequency
and, in any case, the switching
frequencies can differ for a maximum of 50% of the lowest one. If, during synchronization
between two (or more) L6730, it’s important to know in advance which the master is, it’s timely
to set its switching frequency at least 15% higher than the slave. Using an external clock signal
(f
EXT
) to synchronize one or more devices that are working at a different switching frequency
(f
SW
) it is recommended to follow the below formula:
f
f
≤
≤
3
The phase shift between master and slaves is approximately done 180°.
Table 6.
S/O/U pin; CC/O/U pin
R1
R2
V
SOU
/V
CCDR
UVLO
OVP
SINK CC
N.C
0
0
5V BUS
Not Latched
Not
11K
2.7K
0.2
5V BUS
Not Latched
Yes
6.2K
2.7K
0.3
5V BUS
Latched
Not
4.3K
2.7K
0.4
5V BUS
Latched
Yes
2.7K
2.7K
0.5
12V BUS
Not Latched
Not
1.8K
2.7K
0.6
12V BUS
Not Latched
Yes
1.2K
2.7K
0.7
12V BUS
Latched
Not
0
N.C
1
12V BUS
Latched
Yes
Figure 21. Synchronization.
PWM SIGNALS
INDUCTOR CURRENTS
SW
EXT
SW
f
相關(guān)PDF資料
PDF描述
L6730C Adjustable step-down controller with synchronous rectification
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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:- 標準包裝: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:- 標準包裝: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:- 標準包裝: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)
L6730TR 功能描述:DC/DC 開關(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 安裝風格: 封裝 / 箱體:CPAK
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