LM3481 boost circuit

In the design of a DC-DC circuit, input lithium battery (3V-4.2V), output DC 120V 4W rated, 10W maximum, using LM3481 Flyback topology +MOS+ transformer implementation, but since LM3481 has not been used, need technical support, help me calculate the parameters of the transformer, EFD or EE magnetic core transformer can be used

user6383438：

LM3481-FLYBACK-SCH_202007151120021.docx

Johnsin Tao：

回复 user6383438:

HI

    建议你用升压芯片加chargepump来做，参考下面的案例，选择较低输入电压的升压芯片来做即可，相对比隔离方案简单：

   300V10mA升压.pdf