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参数资料
| 型号： | L6730TR |
| 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： | L6730TR |
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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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| L6731B | 功能描述:开关变换器、稳压器与控制器 Adj. Step-Down w/ Synch Rectification RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| L6731BTR | 功能描述:IC CTRLR ADJ STEP DOWN 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,000 系列:- 应用:电源，ICERA E400，E450 输入电压:4.1 V ~ 5.5 V 输出数:10 输出电压:可编程 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:42-WFBGA，WLCSP 供应商设备封装:42-WLP 包装:带卷 (TR) |
| L6731D | 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 |
| L6731DTR | 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 |
| L6732 | 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 |
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