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参数资料
| 型号： | L6730 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | HTSSOP-20 |
| 文件页数： | 21/52页 |
| 文件大小： | 1569K |
| 代理商： | L6730 |
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Device description
L6730 - L6730B
28/52
Doc ID 11938 Rev 3
Table 7 shows how to set the different options through an external resistor divider:
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 24 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 (fEXT) to synchronize one or more devices that are working at a
different switching frequency (fSW) it is recommended to follow the below formula:
Figure 23.
External resistor
Table 7.
S/O/U and CC/O/U pin
R1
R2
VSOU/VCCDR
UVLO
OVP
SINK CC
N.C
0
Ω
0
5V BUS
Not latched
Not
11K
Ω
2.7K
Ω
0.2
5V BUS
Not latched
Yes
6.2K
Ω
2.7K
Ω
0.3
5V BUS
Latched
Not
4.3K
Ω
2.7K
Ω
0.4
5V BUS
Latched
Yes
2.7K
Ω
2.7K
Ω
0.5
12V BUS
Not latched
Not
1.8K
Ω
2.7K
Ω
0.6
12V BUS
Not latched
Yes
1.2K
Ω
2.7K
Ω
0.7
12V BUS
Latched
Not
0
Ω
N.C
1
12V BUS
Latched
Yes
R1
R2
L6730/B
S/O/U
CC/O/U
VCCDR
SW
EXT
SW
f
≤
3
,
1
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| L6730B | 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20 |
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| L6732CTR | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| L6732 | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6730_09 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
| L6730B | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6730BTR | 功能描述:DC/DC 开关控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| L6730C | 功能描述:IC REG CTRLR BUCK PWM VM 20TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:100% 电源电压:8.2 V ~ 30 V 降压:无 升压:无 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:是 工作温度:0°C ~ 70°C 封装/外壳:8-DIP（0.300"，7.62mm） 包装:管件 产品目录页面:1316 (CN2011-ZH PDF) |
| L6730CQ | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Adjustable step-down controller with synchronous rectification |
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