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1/3 Structure Product series Type Function Silicon Monolithic Integrated Circuit
PWM Driver for combi drive
BD7791KVT
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.
Absolute maximum ratings
Parameter Power MOS supply voltage Control circuit power supply voltage Maximum driver output current Power dissipation Operating temperature range Storage temperature range Joint part temperature Symbol PVcc Vcc IoMAX Pd Topr Tstg Tjmax Limits 6 6 3 1 1.37 2 -3085 -55150 150 Unit V V A W
#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 (70mmx70mmx1.6mm,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 PVcc Vcc MIN 4.0 4.0 TYP 5.0 5.0 MAX 5.5 5.5 Unit V 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
2/3 Electrical characteristics
(Unless otherwise noted Ta=25, Vcc=PVcc=5V, Vref=1.25V, RL(ACT,STP,LOAD)=8+47H, RL(SP)=2+47H, RNF=0.2, 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 10k Voltage gain 2 (CH1,2) GVC2_1,2 10 12 14 dB External input resistor 10k, GVSW=H Output On resistortop and bottom RON1,2,3 1.2 1.8 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 resistortop and bottom RON4,5 1.6 2.4 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 resistortop and bottom RON6 1.8 2.7 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 resistortop and bottom RONSP 0.6 1.4 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 OPENHi-zis also available. CTL2, GVSW H voltage VCTL2H, VGVH 2.6 3.3 V L gm1 MHi-z gm2 GVC1_1,2 H gm3 GVC2_1,2
Circuit current Actuator driver block
Stepping driver block
Loading driver block
Spindle driver block
Others
GVSW Spindle gain mode CH1,2 gain mode 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 MHi-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 4+47H is assumed as a load, and those concerning CH3 are values optimized in case 4+10H is assumed as a load.
PVcc1 10k IN1 Logic 270 0.1 F CNF1 NF amp VO1F Pre driver POWER MOS VO1R 5V
10k
IN2 Logic 270
VO2F Pre driver POWER MOS VO2R
0.1 F
CNF2
NF amp
10k
IN3 Logic 150
VO3F Pre driver POWER MOS VO3R
0.047 F
CNF3
NF amp OSC
IN6
VO6F Logic Pre driver POWER MOS VO6R PGND1 NF amp PVcc3 VO4F Logic Pre driver POWER MOS M VO4R 5V
1
IN4
0.033 F
CNF4
NF amp
IN5 Logic
VO5F Pre driver POWER MOS VO5R PGND3
0.033 F
CNF5
NF amp OSC
5V 100k FG OSC INSP BEMF DETECTER LIMIT Logic Pre driver POWER MOS
COUT CCOM COM PVcc21 PVcc22 U V W
1000pF 5V
RNF1 RNF2 GVSW CTL1 CTL2 TEST1 TEST2 TEST3 Vref GND STBY/BMSW T.S.D. Vcc 22 F 5V RNF=0.2 GVSW
REV. A
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. Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or otherwise dispose of the same, no express or implied right or license to practice or commercially exploit any intellectual property rights or other proprietary rights owned or controlled by ROHM CO., LTD. is granted to any such buyer. Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in order to prevent possible accidents that may result in bodily harm or fire caused by component failure. 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.
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Appendix1-Rev2.0

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