TL431A 延时定时器精密稳压器的典型应用

使用 Vishay 的 TL431A 的参考设计

设计简介

TL431A 延迟定时器精密调节器的典型应用。 TL431A 是 3 端子可调精密并联稳压器，可在适用的扩展商业温度范围内保证温度稳定性。只需选择两个充当分压器网络的外部电阻器，即可将输出电压设置为大于 2.495V (VREF) 直至 30V 的任何电平。这些器件的典型输出阻抗为 0.08 欧姆。有源输出电路提供非常敏锐的开启特性，使这些器件成为许多应用中齐纳二极管的出色改进替代品

说明

Typical Application for TL431A Delay Timer Precision Regulator. The TL431A is 3-terminal adjustable precision shunt regulators with guaranteed temperature stability over the applicable extended commercial temperature range. The output voltage may be set at any level greater than 2.495V (VREF) up to 30V merely by selecting two external resistors that act as a voltage divider network. These devices have a typical output impedance of 0.08 ohm. Active output circuitry provides very sharp turn-on characteristics, making these devices excellent improved replacements for zener diodes in many applications