- 您现在的位置：买卖IC网 > PDF目录80257 > L6926013TR (STMICROELECTRONICS) 1.65 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PDSO8 PDF资料下载
参数资料
| 型号： | L6926013TR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 1.65 A SWITCHING REGULATOR, 800 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | 3 MM, LEAD FREE, MSOP-8 |
| 文件页数： | 2/16页 |
| 文件大小： | 257K |
| 代理商： | L6926013TR |
Operation description
L6926
10/16
4.3
Slope compensation
In current mode architectures, when the duty cycle of the application is higher than
approximately 50%, a pulse-by-pulse instability (the so called sub harmonic oscillation) can
occur.
To allow loop stability also in these conditions a slope compensation is present. This is
realized by reducing the current flowing through the inductor necessary to trigger the COMP
comparator (with a fixed value for the COMP pin voltage).
With a given duty cycle higher than 50%, the stability problem is particularly present with an
higher input voltage (due to the increased current ripple across the inductor), so the slope
compensation effect increases as the input voltage increases.
From an application point of view, the final effect is that the peak current limit depends both
on the duty cycle (if higher than approximately 40%) and on the input voltage.
4.4
Loop stability
Since the device is realized with a current mode architecture, the loop stability is usually not
a big issue. For most of the application a 220 pF connected between the COMP pin and
ground is enough to guarantee the stability. In case very low ESR capacitors are used for
the output filter, such as multilayer ceramic capacitors, the zero introduced by the capacitor
itself can shift at very high frequency and the transient loop response could be affected.
Adding a series resistor to the 220 pF capacitor can solve this problem.
The right value for the resistor (in the range of 50 K) can be determined by checking the load
transient response of the device. Basically, the output voltage has to be checked at the
scope after the load steps required by the application. In case of stability problems, the
output voltage could oscillates before to reach the regulated value after a load step.
相关PDF资料 |
PDF描述 |
|---|---|
| LMD48DP | 2-OUTPUT 75 W DC-DC REG PWR SUPPLY MODULE |
| LK2540-7EPD8TB1 | 2-OUTPUT 150 W AC-DC REG PWR SUPPLY MODULE |
| LS1001-7EPDDTB1 | 1-OUTPUT 100 W AC-DC REG PWR SUPPLY MODULE |
| LS1001-7EPV2TB1 | 1-OUTPUT 100 W AC-DC REG PWR SUPPLY MODULE |
| LS1001-9ERD1TB1 | 1-OUTPUT 100 W AC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6926D | 功能描述:直流/直流开关调节器 Synchronous Step-Dwn RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L6926D013TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:HIGH EFFICIENCY MONOLITHIC SYNCHRONOUS STEP DOWN REGULATOR |
| L6926D1 | 功能描述:直流/直流开关调节器 Hi EFFICIENCY MONOLITHIC SYNC RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L6926D1013TR | 功能描述:直流/直流开关调节器 Hi EFFICIENCY MONOLITHIC SYNC RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| L6926Q1 | 功能描述:直流/直流开关调节器 Hi EFFICIENCY MONOLITHIC SYNC RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。