UPD16818

The UPD16818 is a monolithic dual H bridge driver IC which uses N-channel power MOS FETs in its output stage.By employing the power MOS FETs for the output stage, this driver circuit has a substantially improved saturation voltage and power consumption as compared with conventional driver circuits that use bipolar transistors.The UPD16818 is therefore ideal as the driver circuit of a 2-phase excitation, bipolar-driven stepping motor for the head actuator of an FDD.
 
The absolute maximum ratings of the UPD16818 can be summarized as:(1):the parameter is supply voltage (motor block),the symbol is VM,the rating is -0.5 to +7,the unit is V;(2):the parameter is supply voltage (control block),the symbol is VDD,the rating is -0.5 to +7,the unit is V;(3):the parameter is power dissipation,the symbol is Pd1,the rating is 1.0,the unit is W;(4):the parameter is power dissipation,the symbol is Pd2,the rating is 1.25,the unit is W;(5):the parameter is instantaneous H bridge driver current,the symbol is ID(pulse),the rating is ±1.0,the unit is A;(6):the parameter is input voltage,the symbol is VIN,the rating is 0.5 to VDD+0.5,the unit is V;(7):the parameter is operating temperature,the symbol is TA,the rating is 0 to 60,the unit is ;(8);the parameter is junction temperature,the symbol is Tj(MAX),the rating is 150,the unit is ;(9):the parameter is storage temperature,the symbol is Tstg,the rating is -55 to +150,the unit is .