LB1910

Ordering number : EN5383 Monolithic Digital IC LB1910 FDD Spindle Motor Driver Overview The LB1910 is a 3-phase disc drive motor driver that is optimal for use as a 3.5-inch FDD spindle motor driver. Package Dimensions unit: mm 3222-HSOP28 [LB1910] Functions and Features • • • • Three-phase full-wave linear driver Digital speed control circuit Start and stop circuits (active low) RPM switching H: 300 rpm L: 360 rpm • Current limiter circuit • Built-in index comparator • Thermal shutdown circuit SANYO: HSOP28 Specifications Absolute Maximum Ratings at Ta = 25°C 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 = 25°C 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 43096HA (OT) No. 5383-1/7 LB1910 Electrical Characteristics at Ta = 25°C, VCC = 5 V Parameter 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 input voltage range Hall bias output voltage Leakage current Output saturation voltage Output leakage current Current limiter Control amplifier voltage gain Voltage gain difference between phases V/I conversion source current V/I conversion sink current V/I conversion current ratio DSC buffer input current FG Schmitt hysteresis 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 Thermal shutdown temperature Hysteresis 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 VFG O VFG B TSD ∆TSD * * 2.2 150 2.5 180 40 * 48 ±10 2.8 * * IO = 2 mA * 50 1041.5 1.1 1.1 0.4 ±10 MHz MHz V µA dB mV V °C °C 9 –9 0.8 14 –14 1.0 0.27 0.3 –7 ±1 19 –19 1.2 1.0 µA 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 S/S = 5 V (standby) S/S = 0 V (steady state) VSL = 0 V 0 3.5 180 12 Conditions min typ max 10 18 10 1.0 VCC 270 0.8 VCC 10 VCC – 1.0 200 Unit µA mA µA V V µA V V µA V mVp-p V µA V mA V dB dB µA µA Note: * Items marked with an asterisk are design target values and are not measured. No. 5383-2/7 LB1910 Pin Assignment 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 Note: Hall input high levels are defined as: UIN+ > UIN– VIN+ > VIN– WIN+ > WIN– No. 5383-3/7 LB1910 Block Diagram No. 5383-4/7 LB1910 Pin Functions Pin No. Symbol Pin voltage Equivalent circuit diagram Function 18 19 20 21 22 23 UIN+ UIN– VIN+ VIN– WIN+ WIN– U phase Hall element input 1.5 V min VCC – 1.0 V max V phase Hall element input W phase Hall element input 24 HB 0.8 V typ (IH = 5 mA) Minus side connection for providing the Hall bias current This pin becomes open in the stopped state, thus cutting the Hall bias current. 25 26 27 FGIN+ 2.5 V FGIN– FGOUT • FG amplifier plus input A 2.5-V reference voltage is generated internally. • FG amplifier minus input • FG amplifier output 28 1 I+ I– Index input 2 ID L: 0.4 V max H: 4.5 V min Index output Continued on next page. No. 5383-5/7 LB1910 Continued from preceding page. Pin No. Symbol Pin voltage Equivalent circuit diagram Function 4 SS L: 0.8 V max H: 3.5 V min Start/stop mode switching This is an active-low input. 5 SL L: 1.0 V max H: 3.5 V min Rotational speed switching 6 CLK L: 1.0 V max H: VCC – 1.0 V min Reference clock input A 1-MHz input frequency corresponds to speeds of 300 and 360 rpm. 7 GND • Ground • This pin, pin 14, and the frame must all be grounded together. 8 VCC Power supply This voltage must be stabilized so that ripple and noise do not enter the IC. 9 Rf Output current detection The output current is detected as a voltage by connecting the resistor Rf between this pin and VCC. The current limiter operates by detecting the voltage on this pin. 10 DO Speed discriminator 11 FC Frequency characteristics compensation Current control system loop oscillation is prevented by connecting a capacitor between this pin and ground. Continued on next page. No. 5383-6/7 LB1910 Continued from preceding page. Pin No. Symbol Pin voltage Equivalent circuit diagram Function 13 15 16 UOUT VOUT WOUT U phase output V phase output W phase output 14 PGND Output transistor ground connection Index Pulse Timing Chart 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: Œ 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 December, 1997. Specifications and information herein are subject to change without notice. No. 5383-7/7