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A8958CLB Datasheet(PDF) 5 Page - Allegro MicroSystems |
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A8958CLB Datasheet(HTML) 5 Page - Allegro MicroSystems |
5 / 8 page 8958 VOICE COIL MOTOR DRIVER www.allegromicro.com Term. Terminal Name Function 1 LOGIC SUPPLY VCC; logic supply voltage. 2 INHIBIT An active-high logic input that inhibits the output stages without initiating a park. 3 & 4 UV1 and UV2 Under-voltage detection inputs. If not used, these terminals must be connected to the logic supply (VCC). 5 LIMIT A tri-state input that forces the output of amplifier A into saturation in either direction, or allows normal linear operation. 6 & 7 GROUNDAB Power amplifiers’ ground and thermal heat sink. 8 PARK VOLTAGE Auxiliary inverting input to power amplifier A. 9 SENSEIN– Inverting input to current sense error amplifer. 10 INA+ Non-inverting input to power amplifier A. 11 INA– Inverting input to power amplifier A. 12 OUTA Power amplifier A output to voice coil motor. 13 OUTB Power amplifier B output to voice coil motor. 14 LOAD SUPPLY VBB; load supply voltage. 15 INB– Inverting input to power amplifier B. 16 INB+ Non-inverting input to power amplifier B. 17 SENSEIN+ Non-inverting input to current sense error amplifer. 18 & 19 GROUNDAB Power amplifiers’ ground and thermal heat sink. 20 PWR OK A logic low at this output indicates an under-voltage condition. 21 GROUND Circuit reference. 22 PARK An active-high logic input that activates the park function. 23 PARK DRIVE Power transistor for retract current control on power down or park command. 24 SENSEOUT Output of current sense error amplifier. TERMINAL FUNCTIONS |
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