Ordering number : EN4476B Monolithic Digital IC LB1854M Three-Phase Brushless Motor Driver IC Overview Package Dimensions The LB1854M is a three-phase brushless motor driver IC and is optimal, in particular, for driving VCR capstan and drum motors. unit: mm 3073A-MFP30S [LB1854M] Features • 120° voltage linear drive technique • The LB1854M soft switching scheme allows smaller external capacitors to be used (e.g., chip capacitors). • Built-in thermal-shutdown function • Built-in overcurrent protection circuit • Built-in FG amplifiers (operational amplifier and Schmitt amplifier) • Control start voltage set by an external voltage • The output current feedback level can be changed by changing the control gain to one of two levels. SANYO: MFP30S Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Conditions Ratings Unit VCC1 max 20 V VCC2 max 7.0 V V Applied output voltage VOU, V, W 22 Maximum output current IOUT max 1.5 A Pd max 1.05 W Allowable power dissipation Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Allowable Operating Ranges at Ta = 25°C Parameter Supply voltage Symbol Conditions VCC1 5 to 18 V VCC2 4.3 to 6.5 V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN O3097HA (OT)/31795TH (OT) No. 4476-1/6 LB1854M Electrical Characteristics at Ta = 25°C, VCC1 = 12 V, VCC2 = 5 V Parameter Current drain Symbol typ max ICC1 VC = 0 V, RL = ∞ Conditions min 17 30 Unit mA ICC2 VC = 0 V 6.5 9.5 mA VO (sat) 1 IOUT = 0.5 A, sink + source 1.6 2.2 V VO (sat) 2 IOUT = 1.0 A, sink + source 2.0 3.0 [Drive Block] Output saturation voltage Output TRS breakdown voltage Output resting potential Hall amplifier input offset voltage VO (sus) VOQ IOUT = 20 mA* 20 VC = 0 V 5.7 VH offset V V 6.0 –5 6.3 V +5 mV 5 µA 2.2 V Hall amplifier input bias current IH bias Hall amplifier common mode input voltage range VH ch 1.3 Hall input/output voltage gain GVHO 43 46 49 dB dB 1 [Control Block] Control output drive gain Control output CH difference Control start voltage GVCO1 High gain 37 40 43 GVCO2 Low gain 31 34 37 dB +2 dB ∆GVCO VCTH –2 When VOUTp-p = 2 V Gain control switching high level Gain control switching middle level Middle level when the input is open Gain control switching low level 2.5 V 4 5 V 2 3 V 0 1 V +8 mV [FG Amplifier] FG amplifier input offset voltage Open-loop voltage gain VFG offset –8 GVFG f = 1 kHz Source output saturation voltage VFG OU IO = 2 mA Sink output saturation voltage VFG OD IO = –2 mA Common-mode signal rejection ratio FG amplifier common-mode input voltage range CHR Schmitt hysteresis Schmitt input voltage range dB 37 V 1.3 * VFG CH Phase margin 60 80 0 V dB 3.5 V * 20 Deg ∆Vsh1 FGOUT2: High to low 22 mV ∆Vsh2 FGOUT2: Low to high 22 VshCH 0.7 mV 3.5 V 210 °C [Thermal Shutdown] Operating temperature Hysteresis TSD * ∆TSD * 150 180 15 °C Note: * Items marked with an asterisk are design target values and are not measured. No. 4476-2/6 LB1854M VC VCREF Pin Assignment Block Diagram Sample Application Circuit Unit (resistance: Ω, capacitance: F) No. 4476-3/6 LB1854M Truth Table Input Source Sink W phase → V phase 1 V phase → W phase W phase → U phase 2 U phase → W phase V phase → W phase 3 W phase → V phase U phase → V phase 4 V phase → U phase V phase → U phase 5 U phase → V phase U V W H H L H L L L L H L H L H L H Forward and reverse control F/RC L H L H L H L H L H U phase → W phase L L H H W phase → U phase H Input high: Phase 1 is 0.2 V or more higher than the corresponding phase 2 for each phase input. Low: Phase 1 is 0.2 V or more lower than the corresponding phase 2 for each phase input. Forward and reverse control high: 2.3 V to VCC1 Low: 0 V to 0.7 V 6 Pin Functions Unit (resistance: Ω) Pin No. Symbol 1, 2, 14, 15, 16, 17, 29, 30 FRAME (GND) 3 FC 4 VC REF 1.5 V min VCC2 max VC 0 V min VCC2 max 5 6 VCC1 Pin voltage Equivalent circuit Function Ground for all circuits except the outputs The gain frequency characteristics can be lowered by connecting a capacitor between this pin and ground to prevent oscillation. 5 to 18 V Speed control The LB1854M implements a voltage control scheme in which the output voltage is controlled by the pin 5 voltage. The pin 4 voltage determines the control start voltage. Power supply that provides the drive outputs No. 4476-4/6 LB1854M Continued from preceding page. Unit (resistance: Ω) Pin No. Symbol 7 UOUT 8 VOUT 9 WOUT Pin voltage Equivalent circuit Function Output pins Output transistor ground 10 Feedback can be applied to the control amplifier by inserting resistor between this pin and GND and detecting the output current as a voltage. The overcurrent protection circuit (current limiter) operates by detecting the voltage on this pin. Rf 11 VCC2 4.3 to 6.5 V 12 CL 0 V min VCC2 max Power supply provided to all blocks other than the output block This voltage must be stabilized so that no ripple or other noise is present. The current limiter operates when the Rf pin reaches the same potential as pin 12. The pin 12 potential is set up externally. Control input to output gain switching pin 13 GC 0 V min VCC2 max High level (4 to 5 V): 34 dB Middle level (2 to 3 V) or open: 40 dB (low speed): 34 dB (high speed) Low level (0 to 1 V): 40 dB However, note that this applies when VCC2 is 5 V. 18 FGOUT2 FG Schmitt amplifier output 19 FGOUT1 FG amplifier output Continued on next page. No. 4476-5/6 LB1854M Continued from preceding page. Unit (resistance: Ω) Pin No. Symbol 20 FGIN– 21 FGIN+ 22 FRC 23 WIN2 24 WIN1 25 VIN2 26 VIN1 27 UIN2 28 UIN1 Pin voltage Equivalent circuit Function 0 V min 3.5 V max (when VCC2 is 5 V) FG signal input High: 2.3 V min Low: 0.7 V max Motor forward/reverse control pin Low level (0.7 V or lower): forward High level (2.3 V or higher): reverse W phase Hall sensor input Logic high is the WIN1 > WIN2 state. 1.4 V min 2.0 V max V phase Hall sensor input Logic high is the VIN1 > VIN2 state. U phase Hall sensor input Logic high is the UIN1 > UIN2 state. ■ 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. ■ Anyone purchasing any products described or contained herein for an above-mentioned use shall: ➀ 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: ➁ 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. ■ 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 November, 1997. Specifications and information herein are subject to change without notice. No. 4476-6/6