LB1910 SANYO | Alldatasheet

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Technical content

The LB1910 is a 3-phase disc drive motor driver that is optimal for use as a 3.5-inch FDD spindle motor driver. 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 Package Dimensions unit: mm 3222-HSOP28 Monolithic Digital IC 43096HA (OT) No. 5383-1/7 SANYO: HSOP28 [LB1910] SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN FDD Spindle Motor Driver LB1910 Parameter Symbol Conditions Ratings Unit Maximum supply voltage V CC max 7.0 V Maximum output current I O max1 t ≤ 0.5 s 1.0 A Maximum steady-state output current I O max2 0.7 A Allowable power dissipation Pd max Independent IC 0.5 W Operating temperature Topr –20 to +80 °C Storage temperature Tstg –40 to +150 °C Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Recommended supply voltage V CC 4.2 to 6.5 V Allowable Operating Ranges at Ta = 25°C

No. 5383-2/7 LB1910 Electrical Characteristics at Ta = 25°C, VCC = 5 V Parameter Symbol Conditions min typ max Unit Current drain ICCO S/S = 5 V (standby) 10 µA ICC S/S = 0 V (steady state) 12 18 mA SL bias current ISL VSL = 0 V 10 µA SL input low-level voltage VSLL 0 1.0 V SL input high-level voltage VSLH 3.5 VCC V S/S bias current IS/S 180 270 µA S/S low-level voltage VS/SL 0 0.8 V S/S high-level voltage VS/SH 3.5 VCC V Hall amplifier input bias currentIHB 10 µA Common-mode input voltage Vh 1.5 VCC – 1.0 Vrange Differential input voltage rangeVdif 50 200 mVp-p Hall bias output voltage VH IH = 5 mA 0.8 V Leakage current IHL S/S = 5 V ±10 µA Output saturation voltage Vsat IO = 0.7 A, sink + source 1.3 1.8 V Output leakage current IOL 1.0 mA Current limiter Vlim 0.27 0.3 0.33 V Control amplifier voltage gain G C –7 dB Voltage gain difference between ∆G C ±1 dBphases V/I conversion source current I+ 9 14 19 µA V/I conversion sink current I– –9 –14 –19 µA V/I conversion current ratio I+/I– 0.8 1.0 1.2 DSC buffer input current IDSC 1.0 µA FG Schmitt hysteresis ∆Vsh * 50 mV Speed discriminator counts N 1041.5 Discriminator operating frequencyFD * 1.1 MHz Oscillator frequency range FOSC * 1.1 MHz Index output low-level voltage VIDL IO = 2 mA 0.4 V Index output leakage current IIDL ±10 µA FG amplifier voltage gain G FG * 48 dB FG amplifier input offset VFG O ±10 mV FG amplifier internal reference VFG B 2.2 2.5 2.8 Vvoltage Thermal shutdown temperature TSD * 150 180 °C Hysteresis ∆TSD * 40 °C Note: * Items marked with an asterisk are design target values and are not measured.

No. 5383-3/7 LB1910 Source fi sink Hall input U V W

1 V phase fi W phase H H L

2 V phase fi U phase L H L

3 W phase fi U phase L H H

4 W phase fi V phase L L H

5 U phase fi V phase H L H

6 U phase fi W phase H L L

Note: Hall input high levels are defined as: U IN+ > UIN– VIN+ > VIN– W IN+ > WIN–

No. 5383-4/7 LB1910

No. 5383-5/7 LB1910 Pin No. Symbol Pin voltage Equivalent circuit diagram Function Index outputL: 0.4 V max H: 4.5 V minID2 Index inputI+

  • FG amplifier plus input A 2.5-V reference voltage is generated internally.
  • FG amplifier minus input
  • FG amplifier output 2.5 V FG IN+ FG IN– FG OUT Minus side connection for providing the Hall bias current This pin becomes open in the stopped state, thus cutting the Hall bias current.

0.8 V typ

H = 5 mA)HB24 U phase Hall element input V phase Hall element input W phase Hall element input

1.5 V min

V CC – 1.0 V max U IN+ U IN– VIN+ VIN– W IN+ W IN– Continued on next page.

No. 5383-6/7 LB1910 Continued from preceding page. Pin No. Symbol Pin voltage Equivalent circuit diagram Function Frequency characteristics compensation Current control system loop oscillation is prevented by connecting a capacitor between this pin and ground. F C11 Speed discriminatorD O10 Output current detection The output current is detected as a voltage by connecting the resistor Rf between this pin and V CC . The current limiter operates by detecting the voltage on this pin. Rf9 Power supply This voltage must be stabilized so that ripple and noise do not enter the IC. V CC8

  • Ground
  • This pin, pin 14, and the frame must all be grounded together. GND7 Reference clock input A 1-MHz input frequency corresponds to speeds of 300 and 360 rpm. L: 1.0 V max H: V CC – 1.0 V min CLK6 Rotational speed switchingL: 1.0 V max H: 3.5 V minSL5 Start/stop mode switching This is an active-low input. L: 0.8 V max H: 3.5 V minSS4 Continued on next page.

No. 5383-7/7 LB1910 This catalog provides information as of December, 1997. Specifications and information herein are subject to change without notice. n 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. n Anyone purchasing any products described or contained herein for an above-mentioned use shall: À 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. n 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. Continued from preceding page. Index Pulse Timing C hart Pin No. Symbol Pin voltage Equivalent circuit diagram Function Output transistor ground connectionPGND14 U phase output V phase output W phase output U OUT VOUT W OUT