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| Ordering number : EN4476B Monolithic Digital IC LB1854M Three-Phase Brushless Motor Driver IC Overview The LB1854M is a three-phase brushless motor driver IC and is optimal, in particular, for driving VCR capstan and drum motors. Package Dimensions 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 = 25C Parameter Maximum supply voltage Applied output voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC1 max VCC2 max VOU, V, W IOUT max Pd max Topr Tstg Conditions Ratings 20 7.0 22 1.5 1.05 -20 to +75 -55 to +150 Unit V V V A W C C Allowable Operating Ranges at Ta = 25C Parameter Supply voltage Symbol VCC1 VCC2 Conditions Ratings 5 to 18 4.3 to 6.5 Unit V 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 = 25C, VCC1 = 12 V, VCC2 = 5 V Parameter Current drain [Drive Block] Output saturation voltage Output TRS breakdown voltage Output resting potential Hall amplifier input offset voltage Hall amplifier input bias current Hall amplifier common mode input voltage range Hall input/output voltage gain [Control Block] Control output drive gain Control output CH difference Control start voltage Gain control switching high level Gain control switching middle level Gain control switching low level [FG Amplifier] FG amplifier input offset voltage Open-loop voltage gain Source output saturation voltage Sink output saturation voltage Common-mode signal rejection ratio FG amplifier common-mode input voltage range Phase margin Schmitt hysteresis Schmitt input voltage range [Thermal Shutdown] Operating temperature Hysteresis TSD TSD * * 150 180 15 210 C C Vsh1 Vsh2 VshCH VFG offset GVFG VFG OU VFG OD CHR VFG CH * FGOUT2: High to low FGOUT2: Low to high 0.7 f = 1 kHz IO = 2 mA IO = -2 mA * 80 0 20 22 22 3.5 3.5 37 1.3 -8 60 +8 mV dB V V dB V Deg mV mV V Middle level when the input is open GVCO1 GVCO2 GVCO VCTH When VOUTp-p = 2 V 4 2 0 High gain Low gain 37 31 -2 2.5 5 3 1 40 34 43 37 +2 dB dB dB V V V V VO (sat) 1 VO (sat) 2 VO (sus) VOQ VH offset IH bias VH ch GVHO 1.3 43 46 IOUT = 0.5 A, sink + source IOUT = 1.0 A, sink + source IOUT = 20 mA* VC = 0 V 20 5.7 -5 1 6.0 6.3 +5 5 2.2 49 1.6 2.0 2.2 3.0 V V V V mV A V dB Symbol ICC1 ICC2 VC = 0 V, RL = VC = 0 V Conditions min typ 17 6.5 max 30 9.5 Unit mA mA Note: * Items marked with an asterisk are design target values and are not measured. No. 4476-2/6 LB1854M Pin Assignment Block Diagram Sample Application Circuit VCREF VC Unit (resistance: , capacitance: F) No. 4476-3/6 LB1854M Truth Table Source Sink 1 W phase V phase V phase W phase W phase U phase U phase W phase V phase W phase W phase V phase U phase V phase V phase U phase V phase U phase U phase V phase U phase W phase U H Input V H W L Forward and reverse control F/RC L H L H L H L H L H 2 H L L 3 L L H 4 L H L 5 H L H 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 Pin No. 1, 2, 14, 15, 16, 17, 29, 30 Symbol Pin voltage Equivalent circuit Function Unit (resistance: ) FRAME (GND) Ground for all circuits except the outputs 3 FC The gain frequency characteristics can be lowered by connecting a capacitor between this pin and ground to prevent oscillation. 4 5 VC REF VC 1.5 V min VCC2 max 0 V min VCC2 max 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. 6 VCC1 5 to 18 V Power supply that provides the drive outputs No. 4476-4/6 LB1854M Continued from preceding page. Unit (resistance: ) Pin No. Symbol Pin voltage Equivalent circuit Function 7 8 9 UOUT VOUT WOUT Output pins Output transistor ground Rf 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. 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. 10 11 VCC2 4.3 to 6.5 V 12 CL 0 V min VCC2 max 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 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. 13 GC 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: ) Pin No. Symbol Pin voltage Equivalent circuit Function 20 21 FGIN- FGIN+ 0 V min 3.5 V max (when VCC2 is 5 V) FG signal input 22 FRC 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 23 24 25 26 27 28 WIN2 WIN1 VIN2 VIN1 UIN2 UIN1 1.4 V min 2.0 V max W phase Hall sensor input Logic high is the WIN1 > WIN2 state. V phase Hall sensor input Logic high is the VIN1 > VIN2 state. U phase Hall sensor input Logic high is the UIN1 > UIN2 state. 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 November, 1997. Specifications and information herein are subject to change without notice. No. 4476-6/6 |
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