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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： | 10/52页 |
| 文件大小： | 1569K |
| 代理商： | L6730 |
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Device description
L6730 - L6730B
18/52
Doc ID 11938 Rev 3
The output of the error amplifier is clamped with this voltage (Vss) until it reaches the
programmed value. No switching activity is observable if VSS is lower than 0.5 V and both
MOSFETs are off. When Vss is between 0.5 V and 1.1 V the low-side MOSFET is turned on
because the output of the error amplifier is lower than the valley of the triangular wave and
so the duty-cycle is 0%. As VSS reaches 1.1 V (i.e. the oscillator triangular wave inferior
limit) even the high-side MOSFET begins to switch and the output voltage starts to increase.
The L6730 - L6730B can only source current during the soft-start phase in order to manage
the pre-bias start-up applications. This means that when the startup occurs with output
voltage greater than 0V (pre-bias startup), even when Vss is between 0.5 V and 1.1 V the
low-side MOSFET is kept OFF (see Figure 9 and Figure 10).
The L6730B can always sink current and so it can be used to supply the DDR memory
termination BUS. If overcurrent is detected during the soft-start phase, the device provides
constant current-protection. In case there is short soft-start time and/or small inductor value
and/or high output capacitors value and thus, in case of high ripple current during the soft-
start, the converter can start-up in anyway and limit the current (Chapter 5.8: Monitoring and
Figure 9.
Start-up without pre-bias
Figure 10.
Start-up with pre-bias
LGate
VOUT
IL
VSS
IL
VOUT
LGate
相关PDF资料 |
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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