1/3 Structure Silicon Monolithic Integrated Circuit Product series PWM Driver for combi drive Type BD7791KVT Function ・3-phase-sensor-less system, therefore don’t need three hall sensors for spindle motor driver. ・Stability high-speed start from the state of the stop for spindle motor driver. 特 長 ○Absolute maximum ratings Parameter Power MOS supply voltage Control circuit power supply voltage Maximum driver output current Symbol Limits Unit PVcc 6 V Vcc 6 V IoMAX 3 ＃1 A Pd 1.37 ＃2 W Power dissipation Operating temperature range Topr -30～85 ℃ Storage temperature range Tstg -55～150 ℃ Tjmax 150 ℃ Joint part temperature #1 The current is guaranteed 3.0A in case of the current is turned on/off in a duty-ratio of less than 1/10 with a maximum on-time of 5ms and when short brake. #2 PCB (70mm×70mm×1.6mm,occupied copper foil is less than 3%,glass epoxy standard board) mounting. Reduce power by 11.0mW for each degree above 25℃. ○Recommended operating conditions(Ta=-30～+85℃) 〔Set the power supply voltage taking allowable dissipation into considering〕 Parameter Power MOS supply voltage Control circuit power supply voltage Symbol MIN TYP MAX PVcc 4.0 5.0 5.5 V Vcc 4.0 5.0 5.5 V This product isn’t designed for protection against radioactive rays. Status of this document The Japanese version of this document is the formal specification. A customer may use this translation version only for a reference to help reading the formal version. If there are any differences in translation version of this document , formal version takes priority. REV. A Unit 2/3 ○Electrical characteristics Circuit current Actuator driver block Stepping driver block Loading driver block Spindle driver block Others (Unless otherwise noted Ta=25℃, Vcc=PVcc=5V, Vref=1.25V, RL(ACT,STP,LOAD)=8Ω+47μH, RL(SP)=2Ω+47μH, RNF=0.2Ω, CTL1,2=3.3V, GVSW=0V, VIN1,2,3,4,5,6=OPEN, VCOM=OPEN, VCCOM=OPEN, VCOUT=OPEN) Parameter Symbol MIN. TYP. MAX. Unit Condition Quiescent current ICC － 8 20 mA CTL1,2=H Current in standby mode IST － － 0.2 mA CTL1,2=L Input dead zone (one side) VDZACT1,2,3 － － 3 mV Output offset voltage VOO1,2,3 -50 － 50 mV Voltage gain 1, 2 Voltage gain 1 (CH1,2,3) GVC1_1,2,3 15.5 17.5 19.5 dB External input resistor 10kΩ Voltage gain 2 (CH1,2) GVC2_1,2 10 12 14 dB External input resistor 10kΩ, GVSW=H Output On resistor（top and bottom） RON1,2,3 － 1.2 1.8 Ω Io=500mA PWM frequency f1,2,3CH 215 310 405 kHz Voltage gain 1, 2 Input dead zone (one side) VDZ4,5 10 30 50 mV Output offset voltage VOO4,5 -50 － 50 mV Voltage gain GVC4,5 15.5 17.5 19.5 dB Output On resistor（top and bottom） RON4,5 － 1.6 2.4 Ω Io=500mA PWM frequency f4,5CH 215 310 405 kHz Input dead zone (one side) VDZ6 20 60 100 mV CTL1=H, CTL2=L Output offset voltage VOO6 -50 － 50 mV CTL1=H, CTL2=L Voltage gain GVC6 15.5 17.5 19.5 dB CTL1=H, CTL2=L Output On resistor（top and bottom） RON6 － 1.8 2.7 Ω Io=500mA, CTL1=H, CTL2=L PWM frequency f6CH 215 310 405 kHz CTL1=H, CTL2=L Input dead zone of gm1(one side) VDZSP1 2 30 100 mV Input dead zone of gm2(one side) VDZSP2 6 90 300 mV GVSW=M Input dead zone of gm3(one side) VDZSP3 10 150 500 mV GVSW=H Input output gain 1 gm1 0.88 1.1 1.32 A/V Input output gain 2 gm2 0.28 0.36 0.44 A/V GVSW=M Input output gain 3 gm3 0.17 0.22 0.27 A/V GVSW=H Output On resistor（top and bottom） RONSP － 0.6 1.4 Ω Io=500mA Output limit voltage VLIMSP 0.18 0.22 0.26 V PWM frequency fSP － 167 － kHz Vref drop mute ON threshold voltage VMVref － 0.7 1.0 V Vcc drop mute ON threshold voltage VMVccD 3.2 3.6 4.0 V CTL1 L voltage VCTL1L 0 － 1.0 V CTL1 H voltage VCTL1H 2.0 － 3.3 V CTL2, GVSW L voltage VCTL2L, VGVL 0 － 1.0 V CTL2, GVSW M(Hi-z) voltage VCTL2M, VGVM 1.6 － 2.0 V OPEN（Hi-z）is also available. CTL2, GVSW H voltage VCTL2H, VGVH 2.6 － 3.3 V GVSW Spindle gain mode CH1,2 gain mode L gm1 M（Hi-z） gm2 GVC1_1,2 H gm3 GVC2_1,2 CTL1 CTL2 Brake mode SPINDLE Output CH1,2,3 Output CH4,5 Output CH6 Output L ― Hi-Z Hi-Z Hi-Z Hi-Z L M ACTIVE Hi-Z Hi-Z Hi-Z Short brake H ACTIVE ACTIVE ACTIVE Hi-Z L Hi-Z Hi-Z ACTIVE ACTIVE H M（Hi-z） Reverse brake ACTIVE Hi-Z Hi-Z Hi-Z H ACTIVE ACTIVE ACTIVE Hi-Z Please supply the middle level voltage for CTL2 when using it in the mode of CTL1=L and CTL2=M. ○Package outlines BD7791 (UNIT : mm) REV. A 3/3 ○Block diagram / Application circuit The external constants concerning CH1,2 are values optimized in case 4Ω+47μH is assumed as a load, and those concerning CH3 are values optimized in case 4Ω+10μH is assumed as a load. PVcc1 10kΩ 5V VO1F IN1 Logic Pre driver POWER MOS VO1R 270Ω 0.1μ F 10kΩ CNF1 NF amp VO2F IN2 Logic Pre driver POWER MOS VO2R 270Ω 0.1μ F 10kΩ CNF2 NF amp VO3F IN3 Logic Pre driver POWER MOS VO3R 150Ω 0.047μ F CNF3 NF amp OSC VO6F 1 IN6 Logic Pre driver POWER MOS VO6R PGND1 NF amp 5V VO4F IN4 Logic 0.033μ F PVcc3 CNF4 Pre driver POWER MOS M VO4R NF amp VO5F IN5 Logic Pre driver POWER MOS VO5R PGND3 0.033μ F CNF5 NF amp OSC 1000pF COUT 5V CCOM 100kΩ COM FG PVcc21 OSC INSP BEMF DETECTER Logic Pre driver POWER MOS PVcc22 U V W 5V LIMIT RNF1 RNF2 GVSW GVSW CTL1 CTL2 RNF=0.2Ω STBY/BMSW T.S.D. Vcc TEST1 TEST2 22μ F GND TEST3 Vref REV. A 5V Appendix Notes No technical content pages of this document may be reproduced in any form or transmitted by any means without prior permission of ROHM CO.,LTD. The contents described herein are subject to change without notice. The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set. Any data, including, but not limited to application circuit diagrams information, described herein are intended only as illustrations of such devices and not as the specifications for such devices. ROHM CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any third party's intellectual property rights or other proprietary rights, and further, assumes no liability of whatsoever nature in the event of any such infringement, or arising from or connected with or related to the use of such devices. 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ROHM cannot be held responsible for any damages arising from the use of the products under conditions out of the range of the specifications or due to non-compliance with the NOTES specified in this catalog. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright © 2007 ROHM CO.,LTD. THE AMERICAS / EUPOPE / ASIA / JAPAN Contact us : webmaster@ rohm.co. jp 21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix1-Rev2.0