1/4 STRUCTURE Silicon monolithic integrated circuits PRODUCT SERIES 3-phase motor driver for VTR capstan TYPE BA6868FM FUNCTION ・Direct PWM pseudo-linear drive system ・Built-in torque ripple canceling circuit ○Absolute maximum ratings (Ta=25℃) Parameter Supply voltage Symbol Limit Unit VCC 7 V VM 22 Power dissipation Pd 2.20※ V Input voltage VIN 0～VCC 1 W V ※2 Maximum output current IOUT Operating temperature range Topr -25～+75 ℃ Storage temperature range Tstg -55～+150 ℃ Tjmax 150 ℃ Junction temperature 1800 mA ※1 70mm×70mm×1.6mm glass epoxy board. Derating in done at 17.6mW/℃ for operating above Ta=25℃. ※2 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 Min Typ Max Unit VCC 4.5 5 6.0 V VM 4.0 12 20.5 V VCH 1.5 - VCC-1.7 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 Symbol Limit Unit Min Typ Max Icc - 11 17 mA Heofs -10 - 10 mV VHp 2.45 2.65 2.85 V ECofs -120 - +120 mV Conditions Overall Circuit current Ec=GND, input LLH Hall input Hall input conversion offset Hall element power supply voltage IH+=9mA Torque reference Torque reference offset voltage Torque reference input gain Gio 0.95 1.07 1.18 A/V Output idling voltage ECidle - - 10 mV ECR bias voltage VECR 2.0 2.2 2.4 V TL-CSofs 39 56 73 ｍV VRcc 6.3 9.0 11.7 % RNF=0.5Ω Torque limit TL-CS offset voltage Ripple canceling Ripple canceling rate Input LLH→LMH Forward / reverse rotation selection Forward rotation reference voltage range VEDF - - 2.2 V Reverse rotation reference voltage range VEDR 2.8 - - V High output voltage VOH 0.63 0.90 1.17 V IOUT=-350mA Low output voltage VOL 0.42 0.60 0.78 V IOUT=350mA, RNF=0.5Ω Output oscillator High OSC voltage VOSCH 17 2.1 2.5 V Low OSC voltage VOSCL 1.0 1.2 1.4 V FOSC 30 50 70 kHz Oscillating frequency REV. B COSC=1000pF 3/4 ○Package outline Product No. BA6868FM Lot No. HSOP-M28 (Unit: mm) ○Block diagram ○Pin No. / Pin name Pin No. Saturation prevention for high and low sides PCV PCV PCI 2 SGND H2+ 3 N.C. 4 OSC Hall Amp SGND TSD + - N.C. H2- 5 RCC H1+ 6 ECR H1- 7 CNF H3+ 8 MGND A1A2A3 OSC oscillation RCC Ripple cancel + ECR - + Pin name 1 + ECAmp - CNF H3- Rotation 9 TL 10 EC direction FIN FIN Signal synthesization MGND Hall power supply Com 11 ED/S 12 CS 13 RNF 14 N.C. 15 A1 16 A2 VH+ TL VCC EC VM 17 A3 N.C. 18 N.C. A3 ED/S + CS - A2 CSAmp A3 output RNF N.C. A2 A1 A1 REV. B 19 VM 20 Vcc 21 VH+ 22 H3- 23 H3+ 24 H1- 25 H1+ 26 H2- 27 H2+ 28 PCI 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.) Hysteresis temperature [°C] (typ.) 175 65 (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. 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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