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UC2825A: Enable / disable the controller

Part Number: UC2825A

 Hi team,

 

Could you please suggest how to enable/disable UC2825A with external controller?

The datasheet Fig. 5 looks like the lowering SS pin voltage <1.2V can be used to disable the PWM.

So, do you think the photo-coupler circuit like below works as an external enable/disable circuit?

 

If the above circuit doesn’t work, could you suggest the better approach except for Turing off VCC, VC, and OUT pin?

 

Best regards,

Itoh