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| Ordering number : EN5791 Monolithic Linear IC LA6503 CD-ROM Drive Spindle Motor Driver + Sled Motor Driver + Sled Motion/Position Detector IC Overview The LA6503 was developed for CAV control CD-ROM drives, and provides spindle motor driver, sled motor driver, and sled motion/position detection circuits. Package Dimensions unit: mm 3219-QFP34H-C [LA6503] Functions and Features * CAV control spindle motor driver -- Three-phase brushless motor driver -- IOmax = 1 A -- Built-in FG output circuit (single Hall detection output) -- Reverse braking circuit -- Built-in start/stop circuit -- Upper side current detection for minimal loss in the current detection resistor. Also, the voltage drop in this resistor reduces the IC internal power dissipation. -- Built-in thermal shutdown circuit * Sled motor driver -- One built-in BTL driver channel -- IOmax = 1 A -- Wide dynamic range -- Built-in level shifting circuit -- Muting (output on/off) circuit -- Built-in thermal shutdown circuit * Sled motion/position detection circuit -- Circuit that provides a pulse output corresponding to sled motion and position -- This circuit emits 96 pulses for each rotation from a 24-pole magnet and 90 phase difference Hall element motors, and thus detects the distance moved. It also provides two 48-pulse outputs with differing phases such that the motion direction can be detected from the phase difference between those signals. * Hall bias power supply -- Generates the Hall element 3-V bias voltage. -- IOmax = 30 mA, typical SANYO: QFP34H-C SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 31398HA (OT) No. 5791-1/8 LA6503 Specifications Maximum Ratings at Ta = 25C Parameter Supply voltage Supply voltage Input voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VM max VC max IO max Pd max Topr Tstg Spindle output, sled output Independent IC Conditions Ratings 7 14 VCC 1 0.77 -20 to +75 -55 to +150 Unit V V V A W C C Operating Conditions at Ta = 25C Parameter Operating supply voltage range Symbol VCC VM Conditions Ratings 4.6 to 6.0 4.6 to 13.0 Unit V V Operating Characteristics at Ta = 25C, VCC = 5 V, VM = 12 V (unless otherwise specified) Parameter [Power Supply Current] Current drain 1 (VCC) Current drain 2 (VM) Quiescent current 1 (VCC) Quiescent current 2 (VM) [Spindle Motor Block] [Output] Upper side saturation voltage 1 Lower side saturation voltage 1 Current limiter voltage setting [Hall Amplifier] Common-mode input voltage range Input bias current Minimum Hall input level [S/S Pin] High-level voltage Low-level voltage Input current Leakage current [Control] VC pin input current VCREF pin input current Voltage gain Rising edge threshold voltage Rising edge threshold voltage difference [Hall Comparator] Input offset voltage Input hysteresis Output on voltage Output off voltage Output current (sink) VHCIOFFSET VHCIHYS VOU VOD Isink * 4.7 3 8 0.3 10 mV mV V V mA IVC IVCREF GVCO VCTH VCTH VC = VCREF = 2.5 V VC = VCREF = 2.5 V VRF/VC VCREF = 2.5 V VCREF = 2.5 V 2.35 50 1 1 0.25 2.65 150 5 5 A A Times V mV VS/SH VS/SL IS/SI IS/SL VS/S = 5 V VS/S = 0 V -30 2.0 VCC 0.7 200 V V A A VHCOM VHIB VHIN 60 1.2 1 VCC - 1.0 V A mVp-p Vsource Vsink VCL IO = -0.5 A IO = +0.5 A RRE = 0.43 1.0 0.33 0.32 1.5 0.80 V V V ICC1 IM1 ICC2 IM2 START/STOP = MUTE = 5 V START/STOP = MUTE = 5 V START/STOP = MUTE = 0 V START/STOP = MUTE = 0 V 10 25 5 1 20 50 10 5 mA mA mA mA Symbol Conditions Ratings min typ max Unit Continued on next page. No. 5791-2/8 LA6503 Continued from preceding page. Parameter [Sled Motor Block] Output offset voltage Buffer input voltage range Input voltage range Source output voltage Sink output voltage Closed-circuit voltage gain Slew rate Muting on voltage [Hall Bias (3-V Output Power Supply)] Output voltage Line regulation Load regulation VHB-OUT VHB-LIN IOUT = 30 mA VCC = 4.6 to 6 V, IOUT = 30 mA 2.5 -50 -200 3.0 3.5 +50 +200 V mV mV VOFF VBIN VIN VO1 VO2 VG SR VMUTE The amplifier output is on when at the high level. 0.7 RL = 8 RL = 8 Bridge Amp Voltage difference between outputs -50 1.5 1.0 9.5 10.1 1.8 12 0.15 1.2 2.0 2.4 +50 VCC - 1.5 VCC - 1.5 mV V V V V dB V/s V Symbol Conditions Ratings min typ max Unit VHB-LOAD IOUT = 5 to 30 mA, VCC = 5 V Note: For items marked with an asterisk (*), the Hall comparator goes to the high level when the S/S pin is off (standby mode). Truth Table (Spindle Motor Block) Source Sink 1 WV VW WU UW VW WV UV VU VU UV UW WU Input U H V H W L Control VC H L H L H L H L H L H L (Sled Motor Block) Input (VIN) H Mute H L H L Output SLD-OUT+ H -- L -- SLD-OUT- L -- H -- 2 H L L L 3 L L H Note: "--" indicates that the amplifier output is off. 4 L H L 5 H L H 6 L H H Inputs: The "H" state is when the + input of the corresponding phase is 0.2 V or more higher than the - input. The "L" state is when the + input of the corresponding phase is 0.2 V or more lower than the - input. No. 5791-3/8 LA6503 Pin Assignment No. 5791-4/8 LA6503 Pin Functions 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 29 30 31 32 33 34 Symbol SLED OUT+ SLED OUT- P-GND P-GND SLED-IN VCC (5 V) VREF UIN- UIN+ VIN- VIN+ WIN- WIN+ VHB (3Vreg) HB- HB+ HA- HA+ S-GND P-GND P-GND MUTE START/STOP FC VC WOUT VOUT UOUT RF FG VM (12 V) POUT ROUT QOUT Sled motor noninverted output Sled motor inverted output Power system ground Power system ground Sled motor signal input (The gain is set with a resistor.) Signal system power supply (5 V) Reference voltage input Three-phase spindle motor hall signal input pin (U phase -) Three-phase spindle motor hall signal input pin (U phase +) Three-phase spindle motor hall signal input pin (V phase -) Three-phase spindle motor hall signal input pin (V phase +) Three-phase spindle motor hall signal input pin (W phase -) Three-phase spindle motor hall signal input pin (W phase +) Hall bias output pin (3-V power supply output) Sled motion distance detection hall element input (HB -) Sled motion distance detection hall element input (HB +) Sled motion distance detection hall element input (HA -) Sled motion distance detection hall element input (HA +) Signal system ground Power system ground Power system ground Sled motor output muting (output on/off control) Spindle motor output start/stop (output on/off control) Phase compensation capacitor connection Input for the spindle control signal from the ASP Three-phase spindle motor output (W phase output) Three-phase spindle motor output (V phase output) Three-phase spindle motor output (U phase output) Output current detection FG signal output Motor power supply (12 V) Sled motion position detection pulse output P (96 pulses) Sled motion position detection pulse output R (48 pulses) Sled motion position detection pulse output Q (48 pulses) Function Allowable power dissipation, Pdmax - W Mounted on the specified printed circuit board Independent IC Ambient temperature, Ta - C No. 5791-5/8 LA6503 Block Diagram Reverse rotation detection Current limiter Control circuit Matrix Reverse braking Forward/ reverse Hall bias (3-V regulator) Start/stop (Spindle motor on/off) Level shifter To each bias circuit Thermal shutdown circuit Muting (Sled motor on/off) Pulse generator circuit Power system ground Pulse generator circuit No. 5791-6/8 LA6503 Notes on Gain Adjustment (Sled Motor Block) * Gain setting The sled motor block gain is set using an external resistor as shown below. Resistor R (Input) For example, when the external resistor R is 22 k, the gain will be 0 dB when seen as an independent output amplifier and 6 dB when seen as a BTL circuit (between outputs). Referenced to this 22-k resistor, the independent output amplifier gain will be 22k/R (as a multiple) or 20 log(22k/R) dB. Similarly, the BTL gain will be 2x22k/R (as a multiple) or 20 log(22k/R) dB + 3 dB. The level shifting circuits used in current models perform both current and voltage conversion, and thus have a different input type from normal operational amplifiers. The current that flows in the external resistor, that is, the potential difference, becomes the input to AMP1 and AMP2. * Output offset voltage The output offset voltage is 1/2 VM (typical). The VO- and VO+ outputs are converted to outputs that are centered on this voltage. No. 5791-7/8 LA6503 Sled Position Detection Pulse Waveforms Note: When the sled motor rotation direction changes (that is, when the HA and HB phase relationship changes), the R-OUT and Q-OUT phase relationship changes and the direction can be detected from that phase. The motion distance and position are detected from P-OUT. s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of March, 1998. Specifications and information herein are subject to change without notice. PS No. 5791-8/8 |
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