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参数资料
| 型号： | L6725ATR |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封装： | SOP-16 |
| 文件页数： | 5/34页 |
| 文件大小： | 962K |
| 代理商： | L6725ATR |
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L6725 - L6725A
Device description
13/32
L6725:The output of the error amplifier is clamped with this voltage (VSS) until it reaches the
programmed value.
L6725A:The reference 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 0.5V and both
MOSFETs are OFF. When VSS is between 0.5V and 1.1V the low-side MOSFET is turned ON.
As VSS reaches 1.1V (i.e. the oscillator triangular wave inferior limit) even the high-side
MOSFET begins to switch and the output voltage starts to increase. During the soft-start phase
the current can’t be reversed in order to allow pre-biased start-up (see Figure 6. and Figure 7.)
.
If an over current is detected during the soft-start phase, the device provides a constant-
current-protection. In this way, in case of short soft-start time and/or small inductor value and/or
high output capacitors value, the converter can start in any case, limiting the current
(Chapter 5.8: Monitoring and protections on page 14). The soft-start phase ends when Vss
reaches 3.5V. After that the over-current-protection triggers the HICCUP mode.
Figure 6.
Start-up without pre-bias
Figure 7.
Start-up with pre-bias
LGate
VOUT
IL
VSS
IL
VOUT
LGate
相关PDF资料 |
PDF描述 |
|---|---|
| L6727TR | 1.5 A SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8 |
| L6727 | 1.5 A SWITCHING CONTROLLER, 350 kHz SWITCHING FREQ-MAX, PDSO8 |
| L6728AHTR | SWITCHING CONTROLLER, PDSO10 |
| L6730DTR | 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20 |
| L6730D | 20 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO20 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6725TR | 功能描述:电压模式 PWM 控制器 Adjustable Step Down Controller RoHS:否 制造商:Texas Instruments 输出端数量:1 拓扑结构:Buck 输出电压:34 V 输出电流: 开关频率: 工作电源电压:4.5 V to 5.5 V 电源电流:600 uA 最大工作温度:+ 125 C 最小工作温度:- 40 C 封装 / 箱体:WSON-8 封装:Reel |
| L6726 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726_08 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726_12 | 制造商:UTC-IC 制造商全称:UTC-IC 功能描述:UNIVERSAL SPEECH CIRCUIT |
| L6726A | 功能描述:开关变换器、稳压器与控制器 Sngl phase PWM controller 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 |
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