BD7790KVT

1/4 Structure Product series Type Function 特 長 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 S ymbol PVcc Vcc IoMAX Pd Topr Tstg Tjmax Limits 6 6 3 ＃1 1.37 ＃ 2 -30～ 85 -55～ 150 150 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 (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 S ymbol PVcc Vcc MIN 4.0 4.0 T YP 5.0 5.0 MAX 5.5 5.5 Unit V V This product isn’t designed for protection against radioactive rays. REV. B 2/4 ○ Electrical characteristics (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 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 10kΩ block 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 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 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 Loading driver Voltage gain GVC6 15.5 17.5 19.5 dB CTL1=H, CTL2=L block 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 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 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 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 OPEN（Hi-z）is also available. CTL2, GVSW H voltage VCTL2H, VGVH 2.6 － 3.3 V GVSW Gain mode CTL1 L gm1 M（Hi-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 M（Hi-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. B 3/4 ○Block diagram / Application circuit 5V 5V 5V 5V RNF=0.2Ω RNF1 RNF2 22μF 18 24 28 M 1000pF PVcc21 PVcc22 U V W PGND1 PGND3 PVcc1 PVcc3 VO6R VO6F COUT VO1R VO2R VO3R VO4R VO5R VO1F VO2F VO3F VO4F VO5F CCOM COM 11 6 7 9 10 12 13 2 3 8 33 31 32 34 35 30 19 20 21 23 27 25 26 29 POWER MOS POWER MOS POWER MOS POWER MOS POWER MOS POWER MOS NF amp NF amp NF amp NF amp NF amp Pre driver Pre driver Pre driver Pre driver Pre driver Pre driver NF amp Logic OSC Pre driver POWER MOS Logic Logic Logic Logic Logic Logic OSC OSC BEMF DETECTER LIMIT STBY/BMSW GVSW T.S.D. 100kΩ 470Ω 470Ω 470Ω 42 41 43 40 44 39 1 45 38 46 37 48 47 22 4 5 14 15 GND 17 16 36 Vcc CNF1 CNF2 CNF3 CNF4 CNF5 CTL1 CTL2 TEST1 TEST2 0.047μF 0.047μF 0.047μF 0.033μF 0.033μF 10kΩ 10kΩ 10kΩ ◎ PIN DESCRIPTION Pin No. Symbol Description Pin No. Symbol Description Spindle driver output U Spindle driver output V Spindle driver power supply22 Spindle driver current sense output2 Spindle driver output W PWM driver power ground3 PWM Driver(CH4) positive output PWM Driver(CH4) negative output PWM driver power supply3 PWM Driver(CH5) positive output PWM Driver(CH5) negative output Reference voltage input PWM driver (CH5) feedback filter PWM driver (CH4) feedback filter PWM driver (CH3) feedback filter PWM driver (CH2) feedback filter PWM driver (CH1) feedback filter PWM driver (CH1) input PWM driver (CH2) input PWM driver (CH3) input PWM driver (CH4) input PWM driver (CH5) input Spindle driver input 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 IN6 VO6F VO6R CTL1 CTL2 VO1F VO1R PGND1 VO2F VO2R PVcc1 VO3F VO3R TEST1 TEST2 TEST3 GND Vcc COUT CCOM COM GVSW PVcc21 PWM Driver (CH6) input PWM Driver(CH6) positive output PWM Driver(CH6) negative output Driver logic control input1 Driver logic control input2 PWM Driver(CH1) positive output PWM Driver(CH1) negative output PWM driver power ground1 PWM Driver(CH2) positive output PWM Driver(CH2) negative output PWM driver power supply1 PWM Driver(CH3) positive output PWM Driver(CH3) negative output 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 U V PVcc22 RNF2 W PGND3 VO4F VO4R PVcc3 VO5F VO5R Vref CNF5 CNF4 CNF3 CNF2 CNF1 IN1 IN2 IN3 IN4 IN5 INSP Test terminal1 Test terminal2 Test terminal3 Pre unit ground Pre unit power supply Smoothing capacitor connection terminal(Output side) Smoothing capacitor connection terminal(COM side) Motor coil center point input terminal Control for gain of spindle Spindle driver power supply21 24 RNF1 Spindle driver current sense output1 48 FG Frequency generator output Positive/Negative of the output terminals are determined in reference to those of the input terminals. REV. B 5V TEST3 GVSW INSP Vref IN1 IN2 IN3 IN6 IN4 IN5 FG 4/4 ●Cautions on use 1．Absolute maximum ratings This IC might be destroyed when the absolute maximum ratings, such as impressed voltage (PVcc, Vcc) or the operating temperature range (Topr), is exceeded, and whether the destruction is short circuit mode or open circuit mode cannot be specified. Please take into consideration the physical countermeasures for safety, such as fusing, if a particular mode that exceeds the absolute maximum rating is assumed. 2．Reverse polarity connection Connecting the power line to the IC in reverse polarity (from that recommended) will damage the part. Please utilize the direction protection device as a diode in the supply line. 3．GND line The ground line is where the lowest potential and transient voltages are connected to the IC. 4．Thermal design Do not exceed the power dissipation (Pd) of the package specification rating under actual operation, and please design enough temperature margins. 5．Short circuit mode between terminals and wrong mounting Do not mount the IC in the wrong direction and be careful about the reverse-connection of the power connector. Moreover, this IC might be destroyed when the dust short the terminals between them or GND. 6．Radiation Strong electromagnetic radiation can cause operation failures. 7．ASO (Area of Safety Operation) When using the IC, set the output transistor so that it does not exceed absolute maximum ratings or ASO. 8．TSD (Thermal Shut-Down) 0 0 The TSD is activated when the junction temperature (Tj) reaches 175 C (with +/-25 C hysteresis), and the output terminal is switched to Hi-z. The TSD circuit designed to shut the IC off to prevent runaway thermal operation. It is not designed to protect or guarantee its operation. Do not continue to use the IC after operating this circuit. 9．Vcc, GND and RNF wiring layout Vcc, GND and RNF layout should be as wide as possible and at minimum distance. Wire to ground to prevent Vcc-PVcc and GND-PGND-GND side of RNF resistor from having common impedance. Connect a capacitor between Vcc and GND to stabilize. 10．Regarding input pin of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements to keep them isolated. PN junctions are formed at the intersection of these P layers with the N layers of other elements, creating a parasitic diode or transistor. For example, the relation between each potential is as follows: When GND > Pin A and GND > Pin B, the PN junction operates as a parasitic diode. When Pin B > GND > Pin A, the PN junction operates as a parasitic transistor. Parasitic diodes can occur inevitably in the structure of the IC. The operation of parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, methods by which parasitic diodes operate, such as applying a voltage that is lower than the GND (P substrate) voltage to an input pin, should not be used. Simplified structure of IC 11．Capacitor between Vcc and GND This IC has steep change of the voltage and current because of PWM driver. Therefore, the capacitor controls Vcc voltage by attaching a capacitor between Vcc and GND. Wiring impedance decreases the capacitors capabilities if the capacitor is far from the IC. Therefore, a capacitor should be placed between Vcc and GND, close to the IC. 12．Supply fault, ground fault and short-circuit between output terminals Do not short-circuit between any output terminal and supply terminal (supply fault) or ground (ground fault), or between any output terminals (load short-circuit). When mounting the IC on the circuit board, be extremely cautious about the orientation of the IC. If the orientation is mistaken, the IC may break down and produce smoke in some cases. 13．Inspection by the set circuit board When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress. Always discharge capacitors after each process or step. Always turn the IC’s power supply off before connecting it to, or removing it from a jig or fixture, during the inspection process. Ground the IC during assembly steps as an antistatic measure. Use similar precaution when transporting and storing the IC. 14．Reverse-rotation braking High-speed rotation may cause reverse-rotation braking. Monitor the voltage applied to the output terminal and consider the revolutions applied to the reversed-rotation brake. 15．Application circuit It is one sample that explains standard operation and usage of this IC about the described example of the application circuit and information on the constant etc. Therefore, please be sure to consult with our sales representative in advance before mass production design, when a circuit different from application circuit is composed of external. REV. B Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. 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