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| Ordering number : EN5503 Monolithic Integrated IC LB1913 FDD Spindle Motor Driver Overview The LB1913 is a three-phase disk drive motor driver IC that is optimal for use as a 3.5-inch floppy disk drive spindle motor driver. Package Dimensions unit: mm 3222-HSOP28 [LB1913] Functions and Features * * * * * * * * Three-phase full-wave linear drive On-chip digital speed control Start and stop circuits (active low) Speed switching High: 300 rpm, Low: 360 rpm Current limiter circuit Index comparator circuit Index delay circuit Thermal protection circuit SANYO: HSOP28 Specifications Absolute Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Maximum output current Maximum steady-state output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IO max1 IO max2 Pd max Topr Tstg Independent IC t 0.5 s Conditions Ratings 7.0 1.0 0.7 0.5 -20 to +80 -40 to +150 Unit V A A W C C Allowable Operating Ranges at Ta = 25C Parameter Recommended supply voltage Symbol VCC Conditions Ratings 4.2 to 6.5 Unit V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 83196HA (0T) No. 5503-1/6 LB1913 Electrical Characteristics at Ta = 25C, VCC = 5.0 V Parameter Symbol ICCO ICC ISL VSLL VSLH IS/S VS/SL VS/SH IHB Vh Vdif VH IHL Vsat IOL Vlim GC GC I+ I- I+/I- IDSC Vsh N FD FOSC VIDL IIDL GFG VFGO VFGB VSH VID VID TSD TSD * * * * 1.0 150 180 40 2.2 2.5 50 20 VCC-1.0 * 48 10 2.8 * * IO = 2 mA * 50 1041.5 1.1 1.1 0.4 10 MHz MHz V A dB mV V mV mV V C C 9 -9 0.8 0.27 0.3 -7 1 14 -14 1.0 19 -19 1.2 1.0 A mV IH = 5 mA S/S = 5 V IO = 0.7 A, sink + source 1.3 1.5 50 0.8 10 1.8 1.0 0.33 0 3.5 Conditions S/S = 5 V (standby mode) S/S = 0 V (normal mode) VSL = 0V 0 3.5 180 12 Ratings min typ max 10 18 10 1.0 VCC 270 0.8 VCC 10 VCC-1.0 200 Unit A mA A V V A V V A V mVp-p V A V mA V dB dB A A Current drain SL bias current SL input low-level voltage SL input high-level voltage S/S bias current S/S low-level voltage S/S high-level voltage Hall amplifier input bias current Common-mode input voltage range Differential-mode input voltage range Hall bias output voltage Leakage current Output saturation voltage Output leakage current Current limiter Control amplifier voltage gain Interphase voltage gain difference V/I converter source current V/I converter sink current V/I converter current ratio DSC buffer input current FG Schmitt hysteresis Number of speed discriminator counts Discriminator operating frequency Oscillator frequency range Index output low-level voltage Index output leakage current FG amplifier voltage gain FG amplifier input offset FG amplifier internal reference voltage Schmitt hysteresis Index input hysteresis Index common-mode input voltage range Thermal shutdown circuit operating temperature Hysteresis Note: * These items are design target values and are not tested. Truth Table Source Sink 1 2 3 4 5 6 V phase W phase V phase U phase W phase U phase W phase V phase U phase V phase U phase W phase Hall input U H L L L H H V H H H L L L W L L H H H L A "high-level" (H) Hall amplifier input means: UIN+ > UIN- VIN+ > VIN- WIN+ > WIN- No. 5503-2/6 LB1913 Pin Assignment Pin Functions Pin no. 18 19 Pin UIN+ UIN- VIN+ VIN- WIN+ WIN- * W-phase Hall element input Pin voltage 1.5 V min VCC-1.0 V max * V-phase Hall element input Equivalent circuit Function * U-phase Hall element input 20 21 22 23 24 HB 0.8 V typ (IH = 5 mA) * Minus-side pin for applying the Hall bias current This pin goes to the open state in the stopped state and the Hall bias is cut off. 25 26 27 FGIN+ FGIN- FGOUT * FG amplifier plus input A reference voltage of 2.5 V is generated by the IC internally. * FG amplifier minus input * FG amplifier output pin 28 1 I+ I- * Index input Continued on next page No. 5503-3/6 LB1913 Continued from preceding page Pin no. 2 Pin ID Pin voltage Low: 0.4 V max High: 4.5 V min Equivalent circuit * Index output Function 3 CD * Connection for external RC time constant circuit. 4 SS Low: 0.8 V max High: 3.5 V min * Start/stop switching input This is an active-low input. 5 SL Low: 1.0 V max High: 3.5 V min * Speed switching input 6 CLK Low: 1.0 V max High: VCC-1.0 V min * Reference clock input Use a clock rate of 1 MHz for 300 and 360 rpm speeds. 7 GND * Ground connection Connect this pin, pin 14, and the frame to ground. 8 VCC * Power supply Provide a well-stabilized power supply so that ripple and noise do not enter the LB1913 from this pin. 9 Rf * Used for output current detection. The output current is converted to a voltage and detected by connecting a resistor (Rf) between this pin and VCC. The current limiter operates by detecting the voltage on this pin. Continued on next page No. 5503-4/6 LB1913 Continued from preceding page Pin no. 10 Pin DO Pin voltage Equivalent circuit * Speed discriminator Function 11 FC * Frequency characteristics correction Current control system open loop oscillation can be prevented by inserting a capacitor between this pin and ground. 13 15 16 UOUT VOUT WOUT * U-phase output * V-phase output * W-phase output 14 PGND * Output transistor ground connection Index Delay Pulse Timing Chart No. 5503-5/6 LB1913 Block Diagram 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 August, 1996. Specifications and information herein are subject to change without notice. No. 5503-6/6 |
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