我的转换器又出现导通10ms就判断的问题。降压电路我通过调整辅助绕组的分压电阻解决了,但升压电路通过调整辅助绕组分压电阻却不能解决。上图请教大家。波形图如下:CH1:out; CH2:vcc;CH4:Vss的电压波形。
KW X:
这是啥电路?你的原理图呢?
user5187796:
回复 KW X:
依照WEBENCH设计的QR电路。实际电路中变压器相位调整好了。我如果调整 RSENS,光耦的负载电阻和辅助绕组的分压电阻都会影响输出。不知这些元件是如何影响输出的,计算式是什么?
user5187796:
回复 user5187796:
After allowing VCC to charge and discharge four times, the LM5023 goes through an auto restart sequence,
enabling the LM5023 soft-start and driver output. It is important to set the over load detection timer long enough
so that under low input-line and full-load conditions that the power supply will have enough time to start-up.
The over load detection timer can be set with the resister in series with the VSD pin VSD), refer to Figure 9.
这是说过载计时器时间要多长为好?有没有参照对像?
Johnsin Tao:
回复 user5187796:
Hi大部分的计算datasheet中都是有的啊
user5187796:
回复 Johnsin Tao:
过载计时器的时间设置多长为好呢?