UPD16814

The UPD16814 is a monolithic dual H bridge driver circuit employing a power MOS FET for its driver stage.By complementing the P channel and N channel of the output stage, the circuit current is substantially improved as compared with that of the conventional charge pump driver.Because the dual H bridge driver circuits at the output stage are independent of each other, this IC is ideal as the driver circuit for a 1- to 2-phase excitation bipolar driving stepping motor for the head actuator of an FDD.

Features of the UPD16814 are:(1)low ON resistance (sum of ON resistance of top and bottom FETs) RON1=2.0W TYP;(2)low current consumption:IDD=100 mA MAX;(3)four input modes independently controlling dual H bridge drivers;(4)stop and brake modes selectable;(5)surface-mount mini-mold package:16-pin plastic SOP (300 mil).

The absolute maximum ratings of the UPD16814 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 0.862,the unit is W;(4):the parameter is power dissipation,the symbol is Pd2,the rating is 1.087,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 +125,the unit is .