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UC1901-SP: CC/CV Without Opto-coupler

Part Number: UC1901-SP
Other Parts Discussed in Thread: UC1843-SP,


I am designing a DC-DC fly-back converter using UC1843-SP PWM controller for space application. The use of Opto-coupler is prohibited in my application hence feedback control is done with UC1901-SP (magnetic feedback). My converter has to work in CC/CV mode (constant 500mA load current ). With magnetic feedback my converter is working good in CV mode of operation. Now my question is 

a) Can i achieve CC/CV output without Opto-coupler ?

b) If yes Can i use  UC1901-SP with external CC circuit for achieving CC/CV output ?

c) If not UC1901-SP can you please suggest any IC for achieving CC/CV output without Opto-coupler

Thanks & Regards,

Karthik Venkateshaiah.