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| BA6665FM 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. Applications CD-ROM / RW, DVD-ROM Features 1) 3-phase, full-wave pseudo linear driving system 2) Built in power save 3) Built in thermal shut down circuit 4) Built in current limit circuit 5) Built in Hall Bias circuit 6) Built in FG-output ( 3 phase parallel output ) 7) With switching function of regular / reverse rotations Absolute maximum ratings (Ta=25C) Parameter Supply voltage Supply voltage Power dissipation Operate.temp.range Strage.temp.range Juncition temp. Maximum o.current Symbol VCC VM Pd Topr Tstg Tjmax IOUT Limits 7 15 22001 -20~+75 -55~+150 150 13002 Unit V V mW C C C mA 70mmx70mmx1.6mm glass epoxy board. 1 Derating in done at 17.6mW / C for operating above Ta=25C. 2 Do not, however exceed Pd, ASO and Tj=150C. Recommended operating conditions (Ta=25C) Parameter Operating supply voltage range Symbol VCC VM Min. 4.5 3.0 Typ. - - Max. 5.5 14.0 V Unit BA6665FM Optical disc ICs Block diagram 28 FIN DRIVER 27 TSD 3 GAIN CONTROL REV - + RNF VM 25 24 23 PS VCC 5 7 CURRENT SENSE AMP 8 + - TL + - 22 21 SERVO SIGNAL 9 Hall 1 10 + - TORQUE SENSE AMP 20 + - Hall Bias VCC (Typ.) 19 11 Hall 2 12 + - + - + - 1.6k 18 1.6k VCC (Typ.) 17 1.6k VCC (Typ.) 16 13 Hall 3 14 FIN BA6665FM Optical disc ICs Pin descriptions Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 FIN Pin Name N.C. N.C. A3 N.C. A2 N.C. A1 GND H1 + Function N.C. N.C. Output3 for motor N.C. Output2 for motor N.C. Output1 for motor GND Hall input Amp1. positive input Hall input Amp1. negative input Hall input Amp2. positive input Hall input Amp2. negative input Hall input Amp3. positive input Hall input Amp3. negative input N.C. FG3 signal output terminal FG2 signal output terminal FG1 signal output terminal Hall bias Capacitor connection pin for phase compensation Torque control standard voltage input terminal Torque control voltage input terminal START / STOP switch Reverse terminal Power supply for signal division N.C. Power supply for driver Terminal connection for current sensing resistor GND H1- H2 + H2- H3 H3 + - N.C. FG3 FG2 FG1 VH CNF ECR EC PS REV VCC N.C. VM RNF FIN BA6665FM Optical disc ICs Electrical characteristics (unless otherwise noted, Ta=25C, VCC=5V, VM=12V) Parameter Symbol Min. Typ. Max. Unit Conditions Test Circuit Fig.1 Fig.1 Fig.2 Fig.2 TOTAL Circuit current1 Circuit current2 POWER SAVE ON voltage range OFF voltage range HALL BIAS Hall bias voltage HALL AMP Input bias current In-phase input voltage range Minimum input level H3 hysteresis level TORQUE CONTROL Input voltage range Offset voltage - Offset voltage + Input current Input-output Gain FG FG output voltage H FG output voltage L OUTPUT Saturation voltage H Saturation voltage L Pre-drive current Torque limit current REVERSE ON voltage range OFF voltage range ICC1 ICC2 VPSON VPSOFF VHB IHA VHAR VINH VHYS EC , ECR ECOFF - ECOFF + ECIN GEC - - 2.5 - 0.5 - 1.5 50 10 0 -70 10 - 0.56 0 4.7 - - 0.9 0.7 - - 20 - -40 40 0.5 0.7 0.2 7.1 - 1.0 1.5 3.0 4.0 - 40 5 -10 70 2.0 0.84 mA mA V V V A V mVpp mV V mV mV A A/V At power save ON At power save OFF IHB=10mA Fig.3 Fig.3 Fig.3 Fig.6 EC , ECR=0.5V~3.3V ECR=1.65V ECR=1.65V EC=ECR=1.65V EC=1.3 , 1.5V 1.8 , 2.0V RNF=0.5 IFG=-20A IFG=3mA IO=-600mA IO=600mA EC=5V output open RNF=0.5 Fig.5 Fig.5 Fig.5 VFGH VFGL VOH VOL IVMP ITL VRSON VRSOFF 4.5 0 - - - 560 2.5 - 4.9 0.25 1.0 0.4 35 700 - - 5.0 0.4 1.5 0.8 70 840 - 1.0 V V V V mA mA V V Fig.6 Fig.6 Fig.4 Fig.4 Fig.6 Fig.2 BA6665FM Optical disc ICs Measurement circuit V2 5V IHB 5V 12V RNF A1 1.65V A2 ICC1 : Value of 'A1' VPS=0 [V] H1+~H3+=(1/2)xVCC+0.1 [V] H1-~H3-=(1/2)xVCC [V] ICC2 : Value of 'A1' VPS=5 [V] H1+~H3+=(1/2)xVCC+0.1 [V] H1-~H3-=(1/2)xVCC [V] VHB : Value of 'V2' VPS=5 [V] IHB=10 [mA] RL H1+ H2+ H3+ H3- H1- H2- Fig.1 Circuit current ) Test Circuit Hall bias voltage 12V 5V VPS VREV EC 1.65V VPSON : Range of 'VPS' that output pins become input-output table. (Input condition 1~6) VPSOFF : Range of 'VPS' that output pins become open. (Input condition 1~6) VRSON : Range of 'VREV' that output pins become input-output table. (Input condition 1~6) VPS=5 [V] EC=0 [V] VRSOFF : Range of 'VREV' that output pins become open. (Input condition 1~6) VPS=5 [V] EC=0 [V] ITL : (Value of 'V1') / 0.5 VPS=5 [V] EC=0 [V] (Input condition 1~6) V1 RNF RL H1+ H2+ H3+ H3- H1- PS ON/OFF range Fig.2 REV ON/OFF range Test Circuit Torque limit current H2- ) BA6665FM Optical disc ICs Input-output table Input conditions Regular Pin No. 9 10 11 12 13 14 7 5 A2 L H H L L H 3 A3 L H L H H L 7 A1 L H H L H L Output Reverse 5 A2 H L L H H L 3 A3 H L H L L H 7pin HI 7pin Low 5pin HI 5pin Low 3pin HI 3pin Low Test point (Regular) H1+ H1- H2+ H2- H3+ H3- A1 Condition 1 Condition 2 Condition 3 Condition 4 Condition 5 Condition 6 L H M M H L M M M M M M H L L H M M M M M M M M M M H L L H M M M M M M H L L H L H Cautions 1 : Regular EC 1.65V IHA : Value of 'A1' (Hn+=4.0V, Hn-=2.5V) Value of 'A2' (Hn+=2.5V, Hn-=4.0V) n=1, 2, 3 VHAR : Hall voltage range that output pins become input-output table. VINH : Hall input level that output pins become input-output table. Hn+-Hn- Hn-=2.5V (n=1, 2, 3) RL A H1+ A A H2+ A A H3+ A H1- Input bias current Fig.3 In-phase input voltage range Hall minimum input level H2- H3- ) Test Circuit BA6665FM Optical disc ICs 5V 12V RNF 1.65V VOH : In case output measurement pin='H' by input condition and IO=-600mA, value of 'VOH'. (VM-RNF short) VOL : In case output measurement pin='L' by input condition and IO=600mA, value of 'VOL'. H1+ H2+ H3+ H3- H1- H2- 600mA 3, 5, 7pin 3, 5, 7pin 600mA VOH VOL VM GND Fig.4 Output saturation voltage H ) Test Circuit Output saturation voltage L 12V 5V EC 1.65V V RNF A EC : Torque control operating. range. ECOFF+, ECOFF- : Offset voltage at ECR=1.65V that value of 'V' become 3mV. ECIN : Value of 'A' at EC=ECR=2.5V GEC : Value of 'V' at EC=1.3VV1 Value of 'V' at EC=1.5VV2 Value of 'V' at EC=1.8VV3 Value of 'V' at EC=2.0VV4 GEC={(V1-V2) / (1.5-1.3)} / RNF GEC={(V4-V3) / (2.0-1.8)} / RNF RNF=0.5 H1+ H2+ H3+ H3- H1- Fig.5 Torque offset voltage Input-output gain H2- RL ) Test Circuit BA6665FM Optical disc ICs VL 12V A 5V EC 1.65V VHYS : Difference Hn+ from Hn- that FG1 / FG2 / FG3 voltage change. (n=1, 2, 3) EC=ECR=1.65V IVMp : value of 'A' Output open (Input condition 1~6) EC=5V, ECR=2.5V VFGL : Value of 'FG-OUTPUT-VOLTAGE' at IFG=3mA (Hn+=L) VFGH : Value of 'FG-OUTPUT-VOLTAGE' at IFG=-20A (Hn+=H) H1+ H2+ H3+ H3- H1- H2- IFG RNF RL Hall hysteresis level Pre-drive current Fig.6 FG output voltage H FG output voltage L ) Test Circuit Electrical characteristic curves 7.5 9 5 CIRCUIT CURRENT : ICC (mA) CIRCUIT CURRENT : ICC (mA) HALL BIAS VOLTAGE : VH (V) 8 7 6 5 4 3 2 1 4 5 3 2 2.5 1 0 1 2 3 4 5 6 7 0 1 2 3 4 5 0 10 20 30 40 50 60 70 80 90 100 HALL BIAS CURRENT : IVH (mA) SUPPLY VOLTAGE : VCC (V) PS VOLTAGE : VPS (V) Fig.7 Circuit Current Fig.8 PS Threshold voltage Fig.9 Hall Bias voltage ITL (mA) 9 TORQUE LIMIT CURRENT (mA) FG3 VOLTAGE : VFG3 (V) 8 7 6 5 4 3 2 1 -50 -40 -30 -20 -10 0 10 20 30 40 + - TORQUE LIMIT CURRENT : ITL 0 +50 EC-ECR (mV) 20 900 800 700 600 500 400 300 200 100 10 50 -50 0 1 2 3 4 5 H3 HYSTERESIS VOLTAGE ; H3 -H3 (mV) OFFSET VOLTAGE ; EC-ECR (mV) TORQUE VOLTAGE : EC (V) Fig.10 H3 Hysteresis Level Fig.11 Torque Control Offset voltage Fig.12 Torque Limit Current BA6665FM Optical disc ICs OUTPUT CURRENT : IO (A) OUTPUT SATURATION VOLTAGE HIGH : VOH (V) OUTPUT SATURATION VOLTAGE LOW : VOL (V) 1.0 2.0 PRE-DRIVE CURRENT : IVM (mA) 2.0 100 1.0 1.0 50 2.0 1.0 2.0 1.0 2.0 10 20 30 OUTPUT CURRENT : IO (A) VM SUPPLY VOLTAGE : VM (V) Fig.14 Output Saturation voltage Low Fig.13 Output Saturation voltage HI Fig.15 Predrive Current External dimensions (Units : mm) 18.5 0.2 28 15 9.9 0.3 7.5 0.2 1 5.15 0.1 14 2.2 0.1 0.11 0.8 0.35 0.1 0.3Min. 0.15 HSOP-M28 0.25 0.1 |
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