KA3020D Fairchild Semiconductor, KA3020D Datasheet
KA3020D
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KA3020D Summary of contents
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... CD-ROM PRODUCTS SPINDLE MOTOR DRIVER The KA3020D is a monolithic integrated circuit, suitable for a 3-phase spindle motor drive system. FEATURES • 3-phase, full-wave, linear BLDC motor driver • Power save at stop mode • Built-in current limiter • Built-in TSD (Thermal shutdown) circuit • ...
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... Hall signal (H1 Hall signal ( H2+ I Hall signal (H2 Hall signal ( H3+ I Hall signal (H3 Hall signal ( FIN(GND KA3020D FIN(GND) Description Pin No. Symbol PC1 FG3X 20 DIR 21 ECR S/S 24 ...
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... Torque control input Start / Stop input 50 40k 23 30k FG output V CC 10k MIC-99D001 January 1999 KA3020D Driver output Hall bias input 5 100k Short brake input 20k Dir output V CC 30k ...
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... KA3020D ABSOLUTE MAXIMUM RATINGS (Ta=25 C) Characteristics Maximum supply voltage (Signal) Maximum supply voltage (Motor) Power dissipation Operating temperature range Storage temperature range @: 1. When mounted on a 50mm 50mm 2. Power dissipation reduces 13.6mW / C for using above not exceed Pd and SOA (Safe operating area). ...
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... E E =1.9V CRIN =1.9V Ifg=-10 A FGH V Ifg=10 A FGL 300mA =300mA =0 Ifg=-10 A DIRH V Ifg=10 A DIRL MIC-99D001 January 1999 KA3020D Min. Typ. Max. Unit - - 0 2 0.0 1.0 V 0.4 1.0 1 1.5 4 mVpp 5 mVpp 0.2 3.3 V 0.2 3 ...
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... KA3020D Characteristics On voltage range Off voltage range CALCUALTION OF GAIN & TORQUE LIMIT CURRENT Current / Voltage Convertor + EC Gm ECR Absolute Values 0.255 which is made from GM times R1 is fixed value within IC. Vmax (see above block diagram) is setted to 350mV. 6 Symbol Test conditions V SBON V SBOFF ...
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... Motor by controlling the output current (I CR Forward 0.51[A/V] 50mV MIC-99D001 January 1999 Gain Driver M Controller TSD ) and compared with CS is equal to the input V . Therefore, CS AMP Rotation E > Ec Forward rotation CR Stop after detecting E < reverse rotation KA3020D ) O 7 ...
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... However, if the spindle motor rotates rapidly, the brake function of the reverse voltage may produce much heat at the Drive IC. To remove this shortcoming and to enhance the braking efficiency, the short brake function is added to KA3020D. When the short brake function is active, all upper power TRs turn off and all lower power TRs turn on make the rotating velocity of the Motor slow down ...
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... When the chip temperature rises up to about 175 C, the Q2 turns on so that the output driver will be shutdown. When the chip temperature falls off to about 150 C, then the Q2 turns off so that the driver is to operate normally. Thus, TSD has the temperature hysteresis of about 25 C. Gain Controller BIAS Q2 MIC-99D001 January 1999 KA3020D 9 ...
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... KA3020D 5. ROTATIONAL DIRECTION DETECTION + H2 • The forward and the reverse rotations of the CD are simply detected by using the D-F/F and the truth table is shown in the above table. • The rotational direction of the CD can be explained by the output waveforms of the Hall sensors. Let the three outputs of Hall sensors be H1, H2 and H3 respectively ...
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... Forward rotation at E < >E C Rotating reverse at short time due to motor inertia Stop within 1/6 turn reverse rotating MIC-99D001 January 1999 Current Sense Amp Gain Driver Controller Reverse rotation preventer E > Forward Brake and stop CR . (Motor still rotates forward) CR KA3020D M > ...
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... KA3020D 7. FG OUTPUT H1 H1+ H2 H2+ H3 H3+ 8. HALL SENSOR CONNECTION HALL 1 9. Connect a by-pass capacitor, 0.1 F between the supply voltage source 10. The heat radiation fin is connected to the internal GND of the package. Connect that fin to the external GND HALL 2 HALL Vcc ...
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... CD-ROM PRODUCTS 11. INPUT-OUTPUT TIMING CHART output current (H1 )+( output voltage A2 output current (H2 )+( output voltage A3 output current (H3 )+( output voltage MIC-99D001 January 1999 KA3020D 13 ...
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... V VM8 RL=5 SW13 VM1 12V 300mA 300mA 14 VR1 VR3 VR2 15 IM1 A IM2 VM6 FG1X SS EC ECR KA3020D GND SW3 RL=5 RL=5 V VM2 MIC-99D001 January 1999 CD-ROM PRODUCTS 10 A 20mA V 14 VM5 13 VR5 VM6 ...
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... VCC FG1X KA3020D 8 21 ECR GND 9 20 DIR H1+ FG3X H2+ PC1 H3 MIC-99D001 January 1999 KA3020D 0.5 V (12V (5V 1.675V OR 2.1 Servo Signal R2 0 ...
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... KA3020D PACKAGE DIMENSION 16 MIC-99D001 January 1999 CD-ROM PRODUCTS ...
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... TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended exhaustive list of all such trademarks. ACEx™ CoolFET™ CROSSVOLT™ CMOS FACT™ FACT Quiet Series™ ® FAST FASTr™ ...