TA8493AFG TOSHIBA Semiconductor CORPORATION, TA8493AFG Datasheet

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Toshiba Bipolar Linear Integrated Circuit Multi-Chip TA8493F/FG, TA8493AF/AFG, 3-Phase Full Wave Brushless DC Motor Driver IC for CD-ROM Drives These 3-phase, full-wave, brushless DC motor driver ICs have been developed for use in CD-ROM drive spindle motors. The TA8493F/FG/ AF/AFG/ ...

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Block Diagram − − − FGO ...

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PIN Assignment Terminal Terminal No. Symbol GND2 N.C. 10 FGO 11 BRK − ...

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Absolute Maximum Ratings Characteristics Power Supply Voltage Output Current Power Dissipation Junction Temperature Operating Temperature Storage Temperature Note1: unmounted Operating Voltage Range Characteristics Power Supply Voltage Electrical Characteristics Characteristics Supply Voltage Input Current Common Mode Hall Amp. Input Voltage Range ...

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Characteristics Output Resistance (upper side) Saturation Voltage Output Circuit (lower side) Cut-off Current (upper side) Cut-off Current (lower side) Input Voltage (H) Mode Select Circuit Input Voltage (L) Input Current Hysteresis Voltage Output Voltage FG Amp. (H) Output Voltage (L) ...

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Function Table <Forward> = −(H − ...

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Hall Signal − Output Voltage GND + Output Current − 2006-3-6 ...

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Functional Description This 3-phase, full wave brushless DC motor driver of the direct PWM control type. • Control amp input circuit V The common mode input voltage ranges for both V Relation between control input and PWM ...

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When V > one of three modes (reverse rotation, reversing brake or short brake mode) can be selected by C ref setting the MS and BRK pins appropriately. <Function> < ref BRK H H Forward ...

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When stopping the motor using reversing brake mode MS: L, BRK ref Forward mode Note3: For an explanation of the Reversing Brake mode stopping sequence, refer to the explanation of the reverse rotation detection circuit. ...

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Hall element bias circuit The hall element bias current is turned off when the driver standby state. Make sure that the negative hall bias line is connected to the HB pin. The remaining voltage is as ...

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Reverse rotation detection circuit By comparing the two phases of the Hall element signal, this circuit detects a state where the phases are inverted, at which time the torque is reduced to 0. The detection accuracy is determined by ...

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Output circuit (upper stage) This circuit uses the system to chop the lower power transistors and resurrect coil current through upper stage diodes. The upper-stage power transistors consist of Pch-MOS transistors (2SJ465), which give high torque efficiency ...

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Current limiter circuit The current limit value is determined by the equation below. 0.3 ∼ − I [A] (typ.) LIM R + 0.1 F This circuit cut off lower power transistors compulsorily when filtered V (0.3 V) PWM signal ...

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External Parts Terminal No. C Power supply line oscillation prevention 1 C Power supply line noise prevention 2 C Power supply line noise prevention 3 C Filter 4 Forward/reverse changeover gain C 5 adjustment C Triangular wave oscillation 6 R ...

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Test Circuit CC1 CC2 INS ( ( • ...

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INH CMRH HB INC ( ( ...

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V OFF (F) OFF (R) LIM ( ( ...

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(U) SAT ( ( ( • R ...

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( ( • ...

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(H) MS (L) INS BRK ( ( ( ...

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OFG (H) OFG ( ( • OFG (H) ...

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Application Circuit − − − FGO Contol C ...

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Package Dimensions Weight: 0.63 g (typ.) 24 2006-3-6 ...

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Notes on Contents 1. Block Diagrams Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory purposes. 2. Equivalent Circuits The equivalent circuit diagrams may be simplified or some parts of ...

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Points to remember on handling of ICs (1) Over current Protection Circuit Over current protection circuits (referred to as current limiter circuits) do not necessarily protect ICs under all circumstances. If the Over current protection circuits operate against the over ...

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27 2006-3-6 ...