type 2, 1 pole at the origin, 1 zero, 1 pole. Phase boost up to 90°. type 3, 1 pole at the origin, 1 zero pair, 1 pole pair. Boost up to 180°. upper limit! This LED resistor is a design limiting factor in low output voltages: This resistor plays a role in dc too!

TL431 是具有 三个端子的可调并联稳压器，因为优异的性能和便宜的价格，可以 广泛应用于单片机精密开关电源或精密线性稳压电源。 TL431 是 可调分流电压基准，在整个工作温度范围内具有可靠的 温度稳定性。 TL431 既可用作 正电压参考，也可用作 负电压参考，因为它用作并联稳压器， TL431 具有 低输出噪声电压。 此外， TL431 还可以组成电压比较器、电源电压监测器、延时电路、精密恒流源等。 下图为 TL431 实物图： 有人会问 TL431 三个引脚怎么区分？ 具体的看 …

A TL431 circuit functions as an adjustable, precision shunt voltage regulator and often appears in power management and switch-mode power supply applications. As a non-inverting reference, it operates similarly to an op-amp with a variable voltage reference, allowing for flexible control between 2.5V and 36V.

2022年9月2日 · The TL431 and TL432 are adjustable shunt voltage references with guaranteed temperature stability over the entire operating temperature range. The device temperature range is extended for the automotive version from -40 °C up to +125 °C. The output voltage can be set to any value between 2.5 and 36 V with two external resistors.

2015年1月6日 · I've found nice and stable power PSU circuit using TL431 IC. It can be converted to higher/lower voltage and higher current with ease. I used TIP147 instead of BD244 and it works fine.

2022年5月13日 · tl431是一个三端可调分流并联稳压器，提供良好的温度稳定性。 典型的动态输出阻抗为0.2Ω，阴极电流调节范围为1-100mA，可以实现2.5V-36V可调的稳压值。

TI 的 TL431 是一款 可调精密并联稳压器。 查找参数、订购和质量信息.

TL431 是由美国德州仪器公司（TI）和Motorola公司生产的2.50~36V可调精密并联稳压器，它是一种具有可调电流输出能力的基准电压源，TL431系列产品包括TL431C、TL431AC、TL431I、TL431AI、TL431M、TL431Y，共6种型号。 它们的内部电路完全相同，仅个别技术指标略有差异。 二、 TL431内部结构. 该器件的符号如图1，三个引脚分别为： 阴极 (CATHODE)、阳极 (ANODE)和参考端 (REF)，参考电压为2.5V。 注意：虽然上面2个原理图的编号2、3有点差 …

The TL431 family comprises a range of 3-terminal adjustable shunt regulators, with specified thermal stability over applicable automotive and commercial temperature ranges. The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V with two external resistors (see Figure 8).

The TL431 and TL432 are adjustable shunt voltage references with guaranteed temperature stability over the entire operating temperature range. The device temperature range is extended for the automotive version from -40 °C up to +125 °C. The output voltage can be set to any value between 2.5 and 36 V with two external resistors.