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1/3 Structure Product series Type Function Silicon Monolithic Integrated Circuit
PWM Driver for combi drive
BD7790KVT
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 described in this specification isn't judged whether it applies to COCOM regulations. Please confirm in case of export. 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. Application example ROHM cannot provide adequate confirmation of patents. The product described in this specification is designed to be used with ordinary electronic equipment or devices (such as audio-visual equipment, office-automation equipment communication devices, electrical appliances, and electronic toys). Should you intend to use this product 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. ROHM assumes no responsibility for use of any circuits described herein, conveys no license under any patent or other right, and make no representations that the circuits are free from patent infringement.
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 Circuit current 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 Actuator driver Voltage gain (CH1,2,3) GVC1,2,3 15.5 17.5 19.5 dB External input resistor 10k block Output On resistortop and bottom RON1,2,3 1.2 1.8 Io=500mA PWM frequency f1,2,3CH 215 310 405 kHz Input dead zone (one side) VDZ4,5 10 30 50 mV Output offset voltage VOO4,5 -50 50 mV Stepping driver Voltage gain GVC4,5 15.5 17.5 19.5 dB block 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 Loading driver Voltage gain GVC6 15.5 17.5 19.5 dB CTL1=H, CTL2=L block 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 Spindle driver Input output gain 2 gm2 0.28 0.36 0.44 A/V GVSW=M block 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 Others 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 GVSW Gain mode CTL1 L gm1 MHi-z gm2 H gm3 CH6 Output Hi-Z Hi-Z Hi-Z ACTIVE Hi-Z Hi-Z
CTL2 Brake mode SPINDLE Output CH1,2,3 Output CH4,5 Output L Hi-Z Hi-Z Hi-Z L M ACTIVE Hi-Z Hi-Z Short brake H ACTIVE ACTIVE ACTIVE L Hi-Z Hi-Z ACTIVE H MHi-z Reverse brake ACTIVE Hi-Z Hi-Z H ACTIVE ACTIVE ACTIVE Please supply the middle level voltage for CTL2 when using it in the mode of CTL1=L and CTL2=M.
Package outlines
BD7790
(UNIT : mm)
REV. A
3/3 Block diagram / Application circuit
PVcc1 10k IN1 Logic 470 0.047F CNF1 NF amp VO1F Pre driver POW ER MOS VO1R 5V
10k
IN2 Logic 470
VO2F Pre driver POW ER MOS VO2R
0.047F
CNF2
NF amp
10k
IN3 Logic 470
VO3F Pre driver POW ER MOS VO3R
0.047F
CNF3
NF amp OSC
IN6 Logic Pre driver POW ER MOS
VO6F VO6R PGND1 NF amp PVcc3 VO4F Logic Pre driver POW ER MOS M VO4R 5V
IN4
0.033F
CNF4
NF amp
IN5 Logic
VO5F Pre driver POW ER MOS VO5R PGND3
0.033F
CNF5
NF amp OSC
5V 100k FG OSC INSP BEMF DETECTER LIMIT Logic Pre driver POW ER 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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