The LL3817 is identical to LL3814, a C-core line output transformer, turns ratio 3 + 3 : 1+1 except that height is 1 mm less. Usage, 3 : 2 In+ pin 1 + pin 6 in- pin 3 + pin 4 leave pin 2 + pin 5 Out+ pin 7 Out- pin 11 Connect pin 12 + pin 8 Ground pin 10 no pin at 9
