M51785P

The M51785P is a semiconductor integrated circuit designed for a single-chip controller for FDD spindle motor,consisting of power amplifier,hall aiplifier,FG amplifier,oscillator and speed discriminator and various protection circuits.

Features of the M51785P are:(1)the high-accuracy,high-stability,and adjustment-free controller is possible by digital servo;(2)speed switch of 1:1.2 possible is MOD;(3)Io(peak)=1.2A;(4)2 enable systems is EN.

The absolute maximum ratings of the M51785P can be summarized as:(1):the symbol is VCCA,the parameter is operating supply voltage,the rating is 15,the unit is V;(2):the symbol is IO,the parameter is output current,the rating is 1.2,the unit is A;(3):the symbol is VHD,the parameter is hall amplifier differential input voltage,the rating is 5,the unit is V;(4):the symbol is Iss,the parameter is source/sink current,the rating is ±3,the unit is mA;(5):the symbol is VIN,the parameter is pin applied voltage,the rating is 0 to VCC,the unit is V;(6):the symbol is linj,the parameter is injection current,the rating is 20,the unit is mA;(7):the symbol is VRF,the parameter is pin applied voltage,the rating is 1,the unit is V;(8):the symbol is Pt,the parameter is power dissipation,the rating is 4.5(8),the unit is W;(9):the symbol is K,the parameter is thermal derating,the rating is 27.8(15.6),the unit is /W;(10):the symbol is Tj,the parameter is junction temperature,the rating is 150,the unit is ;(11):the symbol is Topr,the parameter is operating temperature,the rating is -20 to 65,the unit is ;(12):the symbol is Tstg,the parameter is storage temperature,the rating is -40 to 125,the unit is ;(13):the symbol is VCCB,the parameter is quiescent supply voltage,the rating is 16,the unit is V.