BA6665FM Rohm Semiconductor, BA6665FM Datasheet

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... Optical disc ICs Motor driver for CD-ROMs BA6665FM The BA6665FM is a CD-ROM spindle motor driver supporting reverse-rotation preventing circuit. It incorporates power save circuit, thermal shut down circuit, FG output, hall bias, etc. The 3-phasefall-wave pseudo linear driving system achieves high-performance and multi-function. ...

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... Optical disc ICs Block diagram FIN Hall Hall Hall 3 14 DRIVER TSD GAIN CONTROL REV CURRENT SENSE AMP PS TL TORQUE SENSE AMP Hall Bias VCC (Typ.) 1.6k VCC (Typ.) 1.6k VCC (Typ.) 1.6k FIN BA6665FM SERVO 22 SIGNAL ...

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... Torque control standard voltage input terminal Torque control voltage input terminal START / STOP switch 24 R Reverse terminal Power supply for signal division CC 26 N.C. N.C. V Power supply for driver 27 M Terminal connection for current sensing resistor FIN FIN GND Function BA6665FM ...

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... A 0.56 0.7 0. 4.5 4.9 5 0.25 0.4 V 1.0 1.5 V 0.4 0 560 700 840 mA 2.5 V 1.0 V BA6665FM =12V) M Conditions Test Circuit At power save ON Fig.1 At power save OFF Fig.1 Fig.2 Fig.2 I 10mA HB Fig.3 Fig.3 Fig.3 Fig 0.5V~3. 1.65V Fig 1.65V Fig 1.65V ...

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... VPSOFF : Range of 'VPS' that output pins VRSON : Range of 'VREV' that output pins VRSOFF : Range of 'VREV' that output pins ITL Test Circuit BA6665FM VPS=0 [V] H1 ~H3 =(1/2) VCC+0.1 [V] H1 ~H3 =(1/2) VCC [V] VPS=5 [V] H1 ~H3 =(1/2) VCC+0.1 [V] H1 ~H3 =(1/2) VCC [V] VPS=5 [V] IHB=10 [mA] become input-output table. (Input condition 1~6) become open. ...

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... Low 5pin 5pin Low 3pin HI 3pin Low IHA : Value of 'A1' (Hn =4.0V, Hn =2.5V) VHAR : Hall voltage range that output pins VINH : Hall input level that output pins Test Circuit BA6665FM Value of 'A2' (Hn =2.5V, Hn =4.0V) n= become input-output table. become input-output table =2.5V (n= ...

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... GEC={(V1 V2) / (1.5 1.3)} / RNF GEC={(V4 V3) / (2.0 1.8)} / RNF RNF=0 Test Circuit BA6665FM by input condition and IO= 600mA, value of 'VOH'. (VM-RNF short) by input condition and IO=600mA, value of 'VOL'. value of 'V' become 3mV. Value of 'V' at EC=1.5V V2 Value of 'V' at EC=1.8V V3 Value of 'V' at EC=2.0V V4 ...

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... PS VOLTAGE : V (V) PS Fig.8 PS Threshold voltage I (mA OFFSET VOLTAGE ; E E (mV Fig.11 Torque Control Offset voltage BA6665FM FG1 / FG2 / FG3 voltage change. (n= EC=ECR=1.65V Output open (Input condition 1~6) EC=5V, ECR=2.5V at IFG=3mA (Hn =L) at IFG (Hn = 100 HALL BIAS CURRENT : I VH Fig.9 Hall Bias voltage ...

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... O Fig.14 Output Saturation voltage Low External dimensions (Units : mm) 18.5 ± 0 5.15 ± 0.1 0.8 0.35 ± 0.1 0.3Min. HSOP-M28 OUTPUT CURRENT : I (A) O 1.0 2.0 1.0 2.0 1.0 2.0 Fig.13 Output Saturation voltage HI 0.15 BA6665FM 100 SUPPLY VOLTAGE : V ( Fig.15 Predrive Current ...