A8925 Datasheet | Allegro MicroSystems

8925 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH LINEAR CURRENT CONTROL AND POWER DMOS OUTPUTS Data Sheet 26301.30 3-PHASE BRUSHLESS DC MOTOR CONTROLLER/DRIVER WITH LINEAR CURRENT CONTROL AND POWER DMOS OUTPUTS LOGIC GROUND LOGIC SUPPLY POWER GROUND 7 8 9 39 38 37 36 35 34 33 32 31 POWER GROUND V BB POWER GROUND ABSOLUTE MAXIMUM RATINGS AT TA = +25°C Load Supply Voltage, VBB 14 V Output Current, IOUT ±4.0 A Logic Supply Voltage, VCC 14 V Logic Input Voltage Range, VIN -0.3 V to +6.0 V Package Power Dissipation, PD See Graph Operating Temperature Range, TA 0 °C to +70°C Junction Temperature, TJ +150°C† Storage Temperature Range, TS -55°C to +150°C † Fault conditions that produce excessive junction temperature will activate device thermal shutdown circuitry. These conditions can be tolerated, but should be avoided. Output current rating may be restricted to a value determined by system concerns and factors. These include: system duty cycle and timing, ambient temperature, and use of any heatsinking and/or forced cooling. For reliable operation, the specified maximum junction temperature should not be exceeded. T C U Y D L O N R P EO D C E N U E N R I T E F N E O R C S R I D FO - 10 11 12 13 14 15 16 17 CHARGE PUMPS AND CONTROL SEQUENCING CIRCUITRY The A8925CEB is a DMOS three-phase brushless dc motor controller/driver designed for use in Winchester disk drives and other data storage applications. The power output stages are capable of ±4 A output currents and have DMOS power outputs with less than 0.25 Ω r DS(on) for low power dissipation. Intrinsic ground clamp and flyback diodes protect the output drivers when switching inductive loads. Thermal shutdown circuitry is provided to protect the device from...