1/4 Structure Silicon Monolithic Integrated Circuit Products Series 4ch PWM Sensorless System Motor Driver for MD Type BD6641KUT 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 PWM 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 ○Absolute maximum ratings (Ta=25°C) Parameter Symbol Power supply voltage for control circuit Limit Unit VCC 7 V Power supply voltage for driver block VM 7 V Power supply voltage for pre-driver block VG 14 V VIN 0～VCC V Iomax *500 mA Input voltage Output current Power dissipation Pd **1375 mW Operating temperature range Topr -25～+75 ℃ Storage temperature range Tstg -55～+150 ℃ Tjmax +150 ℃ Junction temperature ＊Must not exceed Pd or ASO, Tjmax=150℃. ＊＊Reduced by 11mW/°C over Ta=25°C, when mounted on a glass epoxy board (70mm70 mm1.6mm). ○Operating conditions (Ta=-25～+75℃) Parameter Power supply voltage Symbol Min. Typ. Max. Unit VCC 2.1 2.2 6.5 V VM － － 3.0 V VG 3 6.5 13 V 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. B 2/4 ○Electrical characteristics (Unless otherwise specified, Ta=25°C, VCC=2.2V, VM=1.0V, fin=176kHz) Parameter Symbol Limit Min. Typ. Max. Unit Conditions ～Spindle (3-phase full-wave sensorless driver)～ Position detection comparator offset VSOFS -10 - 10 mV Position detection comparator input range VSD 0 - VCC-1.0 V Position detection comparatorinput current H ISH - - 2 μA input=VCC Position detection comparatorinput current L ISL -2 - - μA input=0V ISLO -12.8 -9.8 -6.8 μA SLOPE charge current SLOPE discharge current ISLI 6.5 9.4 12.5 μA SLOPE clamp H level VSLH 0.5 0.8 1.1 V SLOPE clamp L level VSLL 0.3 0.46 0.6 V OSC oscillating frequency fOSC 70 100 130 kHz IOSCO -12.5 -9.65 -6.5 μA μA OSC charge current OSC discharge current IOSCI 6.5 9.56 12.5 OSC H level VOSCH 0.5 0.75 1.0 V OSC L level VOSCL 0.35 0.53 0.70 V ISET voltage VSET 350 505 650 mV PWM input frequency ｆPWM 60 132 200 kHz PWM H level input voltage VPWH VCC-0.4 - VCC V PWM L level input voltage VPWL 0 - 0.4 V PWM H level input current IPWH - - 1 μA PWM L level input current IPWL -1 - - μA BLAKE H level input voltage VBKH VCC-0.4 - VCC V BLAKE L level input voltage VBKL 0 - 0.4 V BLAKE H level input current IBKH - - 1 μA BLAKE L level input current OSC=200pF ISET=50kΩ ISET=50kΩ PWM=VCC PWM=0V Brake ON(BD6641KUT) Brake OFF(BD6643KN) Brake OFF(BD6641KUT) Brake ON(BD6643KN) BRAKE=VCC IBKL -1 - - μA BRAKE=0V FG H level output voltage VFGH VCC-0.4 - VCC V Io=-500μA FG L level output voltage VFGL 0 - 0.4 V Io=500μA ～Sled, focus, tracking (stepping, H-bridge 2ch)～ H level input voltage VINH VCC-0.4 - VCC V L level input voltage VINL 0 - 0.4 V H level input current IINH - - 1 μA VIN=VCC L level input current IINL -1 - - μA VIN=0V I/O propagation delay time (H-bridge) Short pulse input response (H-bridge) TRISE - 0.2 1 μs TFALL - 0.1 0.7 μs tmin 120 - - ns mV Input pulse width 200 ns ～Sled, position detection comparator～ Position detection comparator offset VAOFS -10 - 10 Position detection comparator input range VAD 0 - VCC-1.0 V Position detection comparator input current H IAH - - 2 μA μA IAL -2 - - Position detection comparator output voltage L VAOL - 0.2 0.3 V Position detection comparator output pull-up resistance ROA 10 20 30 kΩ Position detection comparator input current L ◎This product is not designed for protection against radioactive rays. REV. B Io=300μA 3/4 ○Package outlines Type BD6641KUT Lot No. TQFP64U outlines (Unit：mm) ○Pin No./Pin name ○Block diagram S2 (1) S1 (64) STBY (32) VCC (40) S3 (2) BEMFU (15) BEMFV (16) VG VG IN1F (18) IN1R (19) SLED PreDriver SLED Decoder H1 PreDriver SLCOM (51) 3 H1VM (12) H1FOUT (20) SLVM (44) SLUOUT (52) SLED BEMF Detector H1ROUT (22) SLVOUT (54) SLW OUT (56) H1PG (21) IN2F (62) BEMFW (17) VG 4 H2 PreDriver SLPG (53) T.S.D IN2R (63) RLV1 (50) RLV2 (48) VM Detect Level H2VM (5) H2FOUT (59) H2ROUT (61) - + H2PG (60) Selector VG (3) 3 VG PW M Switching Predriver C1P (14) C1M (10) FLT1 (46) FLT2 (47) SPCOM (34) VG Charge Pump Spindle BEMF Detector C2P (8) SPVM (37) C2M (7) BRK (33) SPUOUT (25) Commutation Logic & Start-Up Logic PW M (31) SPVOUT (27) SPW OUT (29) Mask SET MSK (38) Slope Osc. FG (45) SLOPE (35) SPPG (28) Triangle Wave Generator ISET (39) OSC (42) N.C. (4,6,11,13,23, 24,26,30,36,41, 43,55,57,58) SGND (49) GND (9) REV. B 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 S2 S3 VG N.C H2VM N.C C2M C2P GND C1M N.C H1VM N.C C1P BEMFU BEMFV BEMFW IN1F IN1R H1FOUT H1PG H1ROUT N.C N.C SPUOUT N.C SPVOUT SPPG SPWOUT N.C PWM STBY 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 BRK SPCOM SLOPE N.C SPVM MSK ISET VCC N.C OSC N.C SLVM FG FLT1 FLT2 RLV2 SGND RLV1 SLCOM SLUOUT SLPG SLVOUT N.C SLWOUT N.C N.C H2FOUT H2PG H2ROUT IN2F IN2R S1 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. (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. 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