BA6868FM_11

1/4 STRUCTURE PRODUCT SERIES TYPE FUNCTION Silicon monolithic integrated circuits 3-phase motor driver for VTR capstan BA6868FM ・Direct PWM pseudo-linear drive system ・Built-in torque ripple canceling circuit ○Absolute maximum ratings (Ta=25℃) Parameter Supply voltage Power dissipation Input voltage Maximum output current Operating temperature range Storage temperature range Junction temperature ※1 ※2 Symbol VCC VM Pd VIN IOUT Topr Tstg Tjmax Limit 7 22 2.20※ 1800 1 Unit V V W V mA ℃ ℃ ℃ 0～VCC ※2 -25～+75 -55～+150 150 70mm×70mm×1.6mm glass epoxy board. Derating in done at 17.6mW/℃ for operating above Ta=25℃. Do not, however exceed Pd, ASO and Tjmax=150℃. ○Recommended operating conditions (Ta= -25～+75℃) Parameter Supply voltage Hall amp in-phase input voltage range Symbol VCC VM VCH Min 4.5 4.0 1.5 Typ 5 12 Max 6.0 20.5 VCC-1.7 Unit V 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. REV. B 2/4 ○Electrical characteristics (Unless otherwise specified, Ta=25℃, VCC=5V, VM=12V) Parameter Overall Circuit current Hall input Hall input conversion offset Hall element power supply voltage Torque reference Torque reference offset voltage Torque reference input gain Output idling voltage ECR bias voltage Torque limit TL-CS offset voltage Ripple canceling Ripple canceling rate Forward / reverse rotation selection Forward rotation reference voltage range Reverse rotation reference voltage range Output High output voltage Low output voltage oscillator High OSC voltage Low OSC voltage Oscillating frequency VOSCH VOSCL FOSC 17 1.0 30 2.1 1.2 50 2.5 1.4 70 V V kHz COSC=1000pF VOH VOL 0.63 0.42 0.90 0.60 1.17 0.78 V V IOUT=-350mA IOUT=350mA, RNF=0.5Ω VEDF VEDR 2.8 2.2 V V VRcc 6.3 9.0 11.7 % Input LLH→LMH TL-CSofs 39 56 73 ｍV ECofs Gio ECidle VECR -120 0.95 2.0 1.07 2.2 +120 1.18 10 2.4 mV A/V mV V RNF=0.5Ω Heofs VHp -10 2.45 2.65 10 2.85 mV V IH+=9mA Icc 11 17 mA Ec=GND, input LLH Symbol Limit Min Typ Max Unit Conditions REV. B 3/4 ○Package outline Product No. BA6868FM Lot No. HSOP-M28 (Unit: mm) ○Block diagram ○Pin No. / Pin name Pin No. 1 S aturation prevention for high and low sides H all Amp Pin name PCV SGND N.C. OSC RCC ECR CNF MGND TL EC ED/S CS RNF N.C. A1 A2 A3 N.C. VM Vcc VH+ H3H3+ H1H1+ H2H2+ PCI PCV S GND N .C. P CI H2+ + - 2 3 4 5 6 7 8 9 10 11 T SD H2- A 1A 2A 3 O SC R CC o scillation + Ripple cancel H1+ - H1H3+ E CR C NF + + E CAmp - H3- R otation direction F IN FIN 12 13 14 M GND C om S ignal synthesization Hall power supply VH+ 15 VCC TL EC E D/S + 16 17 18 19 20 21 22 23 24 25 26 27 28 VM A3 N .C. CS R NF N .C. - C SAmp o utput A2 A3 A2 A1 A1 REV. B 4/4 ○Operation Notes (1) Absolute maximum ratings Use of the IC in excess of absolute maximum ratings such as the applied voltage or operating temperature range (Topr) may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or open mode) when such damage is suffered. The implementation of a physical safety measure such as a fuse should be considered when use of the IC in a special mode where the absolute maximum ratings may be exceeded is anticipated. (2) Power supply lines Regenerated current may flow as a result of the motor's back electromotive force. Insert capacitors between the power supply and ground pins to serve as a route for regenerated current. Determine the capacitance in full consideration of all the characteristics of the electrolytic capacitor, because the electrolytic capacitor may loose some capacitance at low temperatures. If the connected power supply does not have sufficient current absorption capacity, regenerative current will cause the voltage on the power supply line to rise, which combined with the product and its peripheral circuitry may exceed the absolute maximum ratings. It is recommended to implement a physical safety measure such as the insertion of a voltage clamp diode between the power supply and GND pins. (3) Ground potential Ensure a minimum GND pin potential in all operating conditions. (4) Setting of heat Use a thermal design that allows for a sufficient margin in light of the power dissipation (Pd) in actual operating conditions. (5) Actions in strong magnetic field Use caution when using the IC in the presence of a strong magnetic field as doing so may cause the IC to malfunction. (6) ASO When using the IC, set the output transistor for the motor so that it does not exceed absolute maximum ratings or ASO. (7) Thermal shutdown circuit This IC incorporates a TSD (thermal shutdown) circuit (TSD circuit). If the temperature of the chip reaches the following temperature, the motor coil output will be opened. The thermal shutdown circuit (TSD circuit) is designed only to shut the IC off to prevent runaway thermal operation. It is not designed to protect the IC or guarantee its operation. Do not continue to use the IC after operating this circuit or use the IC in an environment where the operation of this circuit is assumed. TSD on temperature [°C] (typ.) 175 (8) Ground Wiring Pattern When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the application's reference point so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change the GND wiring pattern of any external components, either. Hysteresis temperature [°C] (typ.) 65 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"). 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