1/4 Structure Silicon Monolithic Integrated Circuit Product Series 4ch Sensorless System Motor Driver for MD Type BD6640KVT Features ・Operates at low power supply voltage (2.1V min) ・Power DMOS output with low ON resistance (0.8Ω Typ.) ・Incorporates a charge pump circuit for VG boost. ・3-phase full-wave soft-switching sensorless driver for spindle ・3-value control 3-phase driver for sled (built-in comparator for BEMF voltage detection) ・2ch, 3-value control H-bridges for focus/tracking ・PWM half-bridge for spindle VM power supply ○Absolute maximum ratings(Ta=25℃) Parameter Power supply voltage for control circuit Power supply voltage for driver block Symbol Limit Unit VCC 7 V VM 7 V Power supply voltage for pre-driver block VG 14 V Input voltage VIN 0～VCC V Iomax *500 mA Output current Power dissipation Operating temperature range Storage temperature range Junction temperature Pd **1250 mW Topr -25～+75 ℃ Tstg -55～+150 ℃ Tjmax +150 ℃ ＊Must not exceed Pd or ASO, Tjmax=150℃. ＊＊Reduced by 10mW/°C over Ta=25°C, when mounted on a glass epoxy board (70mm70 mm1.6mm). ○Operating conditions (Ta=-25～+75°C) Parameter Power supply voltage Pulse input frequency Symbol Min. Typ. Max Unit VCC1,2 2.1 2.2 6.5 V VM - - 5.0 V VG 3 6.5 13 V fin - - 500 kHz This product described in this specification is not judged whether it applies to COCOM regulations. Please confirm in case of export. This product is not designed for protection against radioactive rays. REV. C 2/4 ○Electrical characteristics (Unless otherwise specified, Ta=25°C, VCC1, 2=2.2V, VM=1.0V, fin=176kHz) Parameter Symbol Limit Unit Conditions Min. Typ. Max. ICC - 4.4 7.0 mA at operation in all blocks IST - 1 10 μA at standby in all blocks RON - 0.8 1.2 Ω VG1 5.5 6.5 6.7 V each input L VG2 4.4 5.2 － V at operation in all blocks Self-propelled oscillating frequency fOSC 50 100 160 kHz External clock synchronous range fSYNC － － 500 kHz Circuit current Output ON resistance upper and lower ON resistance in total VG=10V ～Boost circuit～ Output voltage ～Oscillation circuit～ input from EXTCLK pin ～Spindle (3-phase full-wave sensorless driver) block～ Position VCO -10 － +10 mV Detection comparator input range detection comparator VCD 0 － VCC- V CST charge current ICTO -3.5 -2.1 -0.9 μA CST=1V CST discharge current ICTI 1.0 3.6 7.5 mA CST=1V CSL charge current ICLO -3.5 -7.5 -13 μA CSL=0.5V CSL=0.5V CSL discharge current ICLI 1.2 3.0 6.5 μA CSL clamp H voltage VCLH 0.7 0.8 0.9 V Brake comparator input current IBR － － 2.0 μA Brake comparator input offset VBO -15 － +15 mV Brake comparator input range VBD 0 － VCC-1 V FG output pull-up resistance RBF 10 20 30 kΩ FG output L voltage VOLF － 0.2 0.3 V RIB offset voltage VRO 10 18 30 mV Pre-drive loop gain M-phase check VRP 500 650 850 mV VMCK 400 500 600 mV BRK=VCC Io=300μA VM=0V RIB=500Ω ～Sled, focus, tracking, PWM power supply (stepping, H-bridge, and half-bridge driver) block～ Logic H level input voltage VINH VCC-0.4 － VCC V Logic L level input voltage VINL 0 － 0.4 V IINH1 － － 1 μA VIN=2.2V IINH2 － 350 600 μA VIN=2.2V EXTCLK pin VIN=0V Logic H level input current Logic L level input current Output propagation delay time Short pulse response IINL -1 － － μA TRISE － 0.2 1 μsec TFALL － 0.1 0.7 μsec tmin 120 － － nsec ◎This product is not designed for protection against radioactive rays. REV. C input pulse width 200 ns S3(33) S2(32) S1(31) Decoder Pre Drive PreDrive SLPG1,2 (42,38) VG + － + － + － REV. C C1P (51) C2P (49) C1M (50) C2M (48) EXT CLK (52) STALL (4) Pre Drive Stand-by STHB (5) SPVM1,2 (6,11) SPUOUT SPVOUT SPWOUT (7) (10) (12) SPPG1,2 (8,13) VG (47) Oscillator Charge Pump PWPG (16) PW1 OUT (15) PWVM (14) Pre Drive PreDrive PW IN1 (17) IN2R (3) H2ROUT H2PG1,2 (55) (58,54) H2VM (56) H2FOUT (57) IN2F (2) TSD RIB (22) control Logic FG CST (26) (23) gain M A T R IX BEFMU SLVOUT SLWO BEFMW (34) (41) (36) UT BEFMV SLUOUT SLVM1,2 (39) (35) (43) (40,44) SLCOM (37) N.C. (9,53) H1VM IN1R IN1F (61) (1) (64) H1FOUT H1ROUT H1PG1,2 (62) (60) (63,59) Brake comparator VCC1, 2 (46,45) CSL2 CSL1 (25) (24) SLOPE SIGNAL + ASGND (29) ー + + + ー ー ー SGND (30) SPCOM (21) SPWIN (20) SPVIN (19) SPUIN (18) BRK-(28) BRK+(27) 3/4 ○Package outlines Type BD6640KVT Lot No. TQFP64V outlines (Unit：mm) ○Block diagram ○Pin No./Pin name NO. Pin name NO. Pin name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 IN1R IN2F IN2R STALL STHB SPVM1 SPUOUT SPPG1 N.C SPVOUT SPVM2 SPWOUT SPPG2 PWVM PWOUT PWPG PWIN1 SPUIN SPVIN SPWIN SPCOM RIB CST CSL1 CSL2 FG BRK+ BRKASGND SGND S1 S2 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 S3 BEMFU BEMFV BEMFW SLCOM SLPG2 SLWOUT SLVM2 SLVOUT SLPG1 SLUOUT SLVM1 VCC2 VCC1 VG C2M C2P C1M C1P EXTCLK N.C H2PG2 H2ROUT H2VM H2FOUT H2PG1 H1PG2 H1ROUT H1VM H1FOUT H1PG1 IN1F 4/4 ○Notes on the use (1) Absolute maximum ratings If the input voltage or the operating temperature range exceeds absolute maximum ratings, IC may be damaged. No destruction mode (e.g., short-circuiting or open) can be specified in that case. If such special mode as will exceed absolute maximum ratings is assumed, take the physical safety measures, such as a fuse. (2) Power supply lines The regenerated current by BEMF of the motor will return. Therefore, take measures, such as the insertion of a capacitor between the power supply and GND as the pass of the 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 of the power supply line to rise, which the product and its peripheral circuit may exceed the absolute maximum ratings. It is recommended to implement physical safety measures 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) Design for heat Use the design for heat that allows for a sufficient margin in light of the power dissipation (Pd) in actual using conditions. (5) Operation in strong magnetic field Use caution when using the IC in the strong magnetic field as doing so may cause the IC to malfunction. (6) ASO When using the IC, make settings so that the output transistors for the motor will not be used under conditions in excess of the absolute maximum ratings and ASO. (7) Thermal shutdown circuit This IC incorporates thermal shutdown circuit(TSD circuit). When the chip temperature becomes the one shown in below, TSD circuit operates and makes the coil output to motor open. It is designed to shut the IC off from 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[℃] (typ.) Hysteresis temperature 175 (8) [℃] (typ.) 20 Ground wiring pattern When having both small signal and large current GND, it is recommended to isolate the two GND 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 voltage variations of the small signal GND. Be careful not to change the GND wiring pattern of any external parts, either. REV. C 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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