LB1896

Ordering number: EN5225 Monolithic Digital IC LB1896 3-phase Brushless Motor Driver for CD-ROM Spindle Drive Use Overview The LB1896 is a 3-phase brushless motor driver IC that is ideal for driving CD-ROM spindle motors. Package Dimensions unit : mm 3219-QFP34H-C [LB1896] Functions and Features v v v v 120 ° voltage linear technique V-type control voltage Switchable control gain Control, noncontrol, acceleration/deceleration mode select pins built in. v Start/Stop pin built in, Hall bias built in. Specifications Absolute Maximum Ratings at Ta = 25 °C Parameter Maximum supply voltage Applied output voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC1 max VCC2 max VOU, V, W IOUT Pd max Topr Tstg Independent IC Conditions SANYO : QFP34H – C Ratings 20 7.0 20 1.2 0.77 –20 to +75 –55 to +150 Unit V V V A W °C °C Operating Conditions at Ta = 25 °C Parameter Supply voltage VCref input voltage VNS input voltage Symbol VCC1 VCC2 VCref VNS VCC1 ^ VCC2 Conditions Ratings 5 to 18 4.3 to 6.5 VCC2/2 ±1.0 0 to VCC2 –1.0 Unit V V V V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 13096HA(II) No.5225-1/8 LB1896 Allowable power dissipation, Pd max — W Ambient temperature, Ta — °C Electrical Characteristics at Ta = 25 °C, VCC1 = 12 V, VCC2 = 5 V Parameter Supply current 1 Supply current 2 Supply current 3 [Drive block] Output saturation voltage Output TRS sustaining voltage Output static voltage Hall amplifier input offset voltage Hall amplifier input bias current Hall amplifier common-mode input voltage range Hall input/output voltage gain Control/output drive gain 1 Control/output channel difference 1 Control/output drive gain 2 Control/output channel difference 2 Input dead zone voltage Input bias current 1 Input bias current 2 S/S pin high voltage S/S pin low voltage Gain control 1 high voltage Gain control 1 low voltage Gain control 2 high voltage Gain control 2 low voltage S/S pin input current Gain control 1, 2 current Rotation output saturation voltage Rotation output saturation sustaining voltage Hall bias voltage CTRL pin high voltage CTRL pin low voltage CTRL input current TSD operation voltage TSD hysteresis VO(sat)1 VO(sat)2 VO(sus) VOQ VH offset IH bias VHch GVHO GVCO1 ∆GVCO1 GVCO2 ∆GVCO2 VDZ IB SERVO IB n.s VS/S H VS/S L VGC1 H VGC1 L VGC2 H VGC2 L I S/S IGC V(sat) H.FG V(sus) H.FG VH± VCTRL H VCTRL L ICTRL TSD ∆TSD IO = 5 mA, RH = 200 Ω Common for CTRL1 and CTRL2 input CMOS level Note) CTRL pin Vth = 2.5 V Input voltage = 5 V Design target Design target 0.7 4 1.0 110 210 0.97 RZ1 = RZ2, GC1 = L, GC2 = RZ1 = RZ2, GC1 = L, GC2 = RZ1 = RZ2, GC1 = L, GC2 = RZ1 = RZ2, GC1 = L, GC2 = RZ1 = RZ2, GC1 = L, GC2 = VO (voltage between out and 0.1 V VC = 1.0 V VNS = 1.0 V Input is CMOS level Note) S/S pin Vth = VCC2/2 Input is at CMOS level. Note) GC1 pin Vth = 2.0 V Input is at CMOS level. Note) GC2 pin Vth = 2.0 V Input voltage = 5 V Input voltage = 5 V IO = –5 mA L L H H L out) = IOUT = 0.4 A, sink + source IOUT = 0.8 A, sink + source IOUT = 20 mA VC = 2.5 V, VCref = 2.5 V 1.6 2.0 20 5.7 –5 6.0 1 1.3 40 26 –1.5 32 –1.9 ±13 43 29 35 +1.9 ±38 ±55 500 500 4 1 4 1 4 50 53 0.24 1 100 110 0.5 7 1.2 2.2 3.0 6.3 +5 5 2.2 46 +1.5 V V V V mV µA V dB dB dB dB dB mV nA nA V V V V V V µA µA V V V V V µA °C °C Symbol ICC1 ICC2 ICC3 VC = open, VS/S = 5 V VC = open, VC = open, VS/S = 0 V, Conditions VCref = open, RL = ∞, VCref = open VCref = open, RL = ∞, (ICC of VCC1) min typ 17 7.5 0.9 max 30 10.5 3 Unit mA mA mA 150 53 180 15 Note) Vth is a design target and not measured. No.5225-2/8 LB1896 Mode Switching Truth Table CTRL0 L L H H CTRL1 L H L H Mode Control Noncontrol Acceleration Deceleration L H = 0 to 1.0 V = 4.0 V or more Hall Logic Truth Table Source → Sink 1 2 3 4 5 6 W→V V→W W→U U→W V→W W→V U→V V→U V→U U→V U→W W→U Hall input UIN H H L L H L VIN H L L H L H WIN L L H L H H F/R Control Forward Reverse Forward Reverse Forward Reverse Forward Reverse Forward Reverse Forward Reverse An input is considered to be HIGH when UIN1 > UIN2, VIN1 > VIN2, and WIN1 > WIN2 by 0.2 V or more. Forward when VC > VCref Reverse when VC < VCref Pin Assignment No.5225-3/8 LB1896 Pin Functions Pin No. 3, 4 20, 21 2 23 22 19 Pin Name Frame GND GND UOUT VOUT WOUT Pin Voltage Equivalent Circuit Diagram Pin Function Frame GND. GND must be shared. GND Output pins. Motor connection 17 Rf Output Tr GND. A resistor can be connected between this pin and GND to sense the output current as a voltage drop to provide for overcurrent protection. Idle pins. 4.3 to 6.5 V v Power supply for blocks other than the output block. v This supply should be kept stable to prevent ripple and noise from entering this pin. v First-stage amplifier gain setting resistors. v Z1 and Z2 normally range from several tens of kΩ to several hundreds of kΩ. v The gain is about 6 dB. 18, 24 16 NC VCC2 15 14 Z1 Z2 13 12 VC VCref VCC2/2 ±1.0 v VC is the speed control pin. Forward when VC > VCref. Reverse when VC < VCref. VC is used to control the output voltage. v VCref determines the motor control stop voltage. VCC2/2 in normal use. 11 10 GC1 GC2 0 to VCC2 v Input/output gain switching pins. v GC1 is for first-stage amplifier Z1/Z2 switching. When GC1 is LOW, Z1 is selected; when HIGH, Z2 is selected. GC2 is for next-stage amplifier switching. Continued on next page. No.5225-4/8 LB1896 Continued from preceding page. Pin No. 9 8 Pin Name CTRLφ CTRL1 Pin Voltage 0 to VCC2 Equivalent Circuit Diagram Pin Function v Operation mode switching pins. v Refer to the Mode Switching Truth Table for selection of control, acceleration, or deceleration. 7 NS+ 0 to VCC2 − 1 V v Input pin at noncontrol mode. v The input-output gain is 14 dB. (GC2: LOW) v Motor stops when VNS = 0 V. 6 S/S 0 to VCC2 v When the S/S pin is HIGH, START; when LOW, STOP. v The threshold is VCC2/2. 5 FC v Connect a capacitor between this pin and GND to reduce the input/output gain frequency response and to stop the oscillator. 1 34 33 32 31 30 WIN2 WIN1 VIN2 VIN1 UIN2 UIN1 1.3 to 2.2 V W-phase Hall device input pins. Logic ‘‘H’’ represent WIN1 > WIN2 V-phase Hall device input pins. Logic ‘‘H’’ represent VIN1 > VIN2 U-phase Hall device input pins. Logic ‘‘H’’ represent UIN1 > UIN2 Continued on next page. No.5225-5/8 LB1896 Continued from preceding page. Pin No. 29 28 Pin Name VH+ VH– Pin Voltage 2.4 V 1.4 V Equivalent Circuit Diagram Pin Function v Hall device power supply pins. A voltage difference of 1.0 V is developed between VH+ and VH–. 27 H.FG 0 to VCC2 v Hall FG pin. v The Hall waveform is converted into a pulse signal and then used as the FG pulse signal. 26 CL 0 to VCC2 v When the Rf pin voltage becomes equal to the CL pin voltage, the current limiter operate. The CL voltage is determined externally. 25 VCC1 5 to 18 V v Power supply for output block. v This supply should be kept stable to prevent ripple and noise from entering this pin. No.5225-6/8 LB1896 Block Diagram Start/Stop Absolute value detection Gain switching Mode switching Hall amplifier & Matrix & F/R switching Hall bias Sample Application Circuit No.5225-7/8 LB1896 No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: 2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 1996. Specifications and information herein are subject to change without notice. No.5225-8/8