It can't be completely substituted. The DK106 and 3842 are both PWM controllers, but they have different characteristics and parameters. For example, the maximum operating voltage of the DK106 is 40V, while the maximum operating voltage of the 3842 is 60V. In addition, the pin functions and circuit connections of the two are also different. Therefore, although 3842 can be used to replace DK106 in some applications, it cannot be completely replaced, and needs to be selected according to the specific situation.
dkI06 can be replaced with 3842.