Ordering number: EN5634 Monolithic Digital IC LB1895, 1895D 3-Phase Brushless Motor Driver for CD-ROM Spindle Motors Overview The LB1895 and LB1895D are 3-phase brushless motor drivers for use in CD-ROM spindle motors. Package Dimensions unit : mm 3222-HSOP28 [LB1895] . Current linear drive . V-type control amplifier built in . Because the power supply for the bias circuit on the upper . . . . . 0.5 7.6 5.6 15 1 14 2.7 0.2 0.3 1.8max 0.8 15.2 0.1 . output side is separate, output with low saturation can be attained by boosting only that power supply. (Effective when VCC = 5 V) Because current is detected on the upper side, there is no voltage loss due to the RF resistance. In addition, the RF voltage reduces the power dissipation within the IC. (Effective when VCC = 5 V) Start/Stop function built in Thermal shutdown circuit built in Overcurrent protection circuit built in Two-channel Hall signal comparator built in. (For detecting rotation direction and Hall FG output) Hall device bias built in 28 1.0 Functions and Features 0.8 SANYO : HSOP28 unit : mm 3196-DIP30SD [LB1895D] SANYO : DIP30SD SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 4097HA(II) No.5634-1/12 LB1895, 1895D Specifications Maximum Ratings at Ta = 25 °C Parameter Symbol Conditions Ratings Unit Maximum supply voltage 1 VCC1 max 7 V Maximum supply voltage 2 VCC2 max 14.4 V Maximum supply voltage 3 VCC3 max 14.4 V Applied output voltage VO max 14.4 V Applied input voltage VI max VCC1 V Output current IO max 1.0 A Indepent IC [LB1895] 0.5 W Glass epoxy board (114.3 × 762 × 1.5 mm) [LB1895D] 2.4 W Allowable power dissipation Pd max Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Ratings Unit Operating Conditions at Ta = 25 °C Parameter Symbol Conditions VCC1 VCC2 Supply voltage ^ VCC1 VCC3 4 to 6 V 4 to 13.6 V 2 to 13.6 V Application Examples at Ta = 25 °C (1) 12 V model Power supply pins VCC1 VCC2 = VCC3 Conditions REG. voltage UN-REG. voltage Ratings Unit 4 to 6 V 4 to 13.6 V Ratings Unit (2) 5 V model Power supply pins VCC1 = VCC3 VCC2 Conditions REG. voltage Boost voltage or REG. voltage (Note) 4 to 6 V 4 to 13.6 V Note: If VCC2 is used as the boost voltage, output with low saturation can be used. No.5634-2/12 LB1895, 1895D Electrical Characteristics at Ta = 25 °C, VCC1 = 5 V, VCC2 = VCC3 = 12 V (Unless otherwise specified) Parameter Symbol Conditions min typ max Unit [Supply current] Supply current 1 ICC1 VC = VCREF 4 7 mA Supply current 2 ICC2 VC = VCREF 0 0.5 mA VC = VCREF 150 Supply current 3 ICC3 250 µA Output quiescent current 1 ICC1OQ VS/S = 0 V 200 µA Output quiescent current 2 ICC2OQ VS/S = 0 V 30 µA Output quiescent current 3 ICC3OQ VS/S = 0 V 30 µA [Output] Upper saturation voltage 1 VOU1 Lower saturation voltage 1 VOD1 IO = –0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V IO = 0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V 0.3 0.5 V Upper saturation voltage 2 VOU2 IO = –0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V 0.3 0.5 V Lower saturation voltage 2 VOD2 IO = 0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V RRF = 0.43 Ω 0.3 0.5 V 0.32 0.4 V VCC1 –1.0 V Current limiter setting voltage VCL 0.25 0.8 1.3 V [Hall Amplifier] Hall amplifier common-mode input voltage range VHCOM 1.2 1 Hall amplifier input bias current IHIB Minimum Hall input level VHIN 60 High-level voltage VS/SH 2.0 Low-level voltage VS/SL 2 µA mVp-p [S/S pin] Input current IS/SI VS/S = 5 V LEAK current IS/SL VS/S = 0 V VCC1 V 0.7 V 200 µA –30 µA [Control stage] VC pin input current IVC VC = VCREF = 2.5 V 1 3 µA VCREF pin input current IVCREF VC = VCREF = 2.5 V 1 3 µA Voltage gain VGCO ∆VRF/∆VC Rising threshold voltage VCTH VCREF = 2.5 V 2.35 2.65 V ∆ VCTH VCREF = 2.5 V 50 150 mV Rising threshold voltage width 0.2 0.25 0.3 Times [Hall supply] Hall supply voltage VH Allowable current IH IH = 5 mA 1.0 1.6 20 V mA [Thermal shutdown] Operating temperature Hysteresis TTSD *D ∆TTSD *D 150 180 210 15 °C °C [Hall comparator] Input offset voltage Input hysteresis Output ON voltage VHCIoffset VHCIhys 3 VOU Output OFF voltage VOD Output current (sink) ISINK Note 4.7 3 8 10 mV 15 mV 0.3 V V mA Note: When in S/S OFF (standby) state, the Hall comparator goes high. *D stands for design target; this value is not measured. No.5634-3/12 Allowable power dissipation, Pd max – W LB1895, 1895D Pd max – Ta 2.8 2.4 LB1895D 2.0 1.6 1.2 0.8 LB1895 0.4 0 |20 0 20 40 60 80 100 Ambient temperature, Ta – °C Truth Table Source → sink 1 2 3 4 5 6 W phase → V phase V phase → W phase W phase → U phase U phase → W phase V phase → W phase W phase → V phase U phase → V phase V phase → U phase V phase → U phase U phase → V phase U phase → W phase W phase → U phase Input U V W H H L H L L L L H L H L H L L H H H Control VC H L H L H L H L H L H L Inputs H: For each phase input 2, phase input 1 is at a higher electric potential of 0.2 V or more. L: For each phase input 2, phase input 1 is at a lower electric potential of 0.2 V or more. No.5634-4/12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VOUT UOUT NC VCC2 VCC3 RF FRAME GND FRAME GND FRAME GND VCC1 VCOMPO WCOMPO UIN1 UIN2 VIN1 PWR GND WOUT NC VC VCREF VCREF FC FRAME GND FRAME GND FRAME GND SIG GND S/S VH WIN2 WIN1 VIN2 2 3 4 5 6 7 UOUT NC VCC2 NC VCC3 RF 8 9 10 11 12 13 14 UIN2 VIN1 FC 22 UIN1 VCREF VCREF 23 NC VC 24 WCOMPO WOUT 25 VCOMPO NC 26 VCC1 PWR GND 27 NC SIG GND S/S VH WIN2 WIN1 VIN2 FRAME GND NC 28 FRAME GND 1 VOUT LB1895, 1895D LB1895 Pin Assignment 21 20 19 18 17 16 15 LB1895 HSOP-28 A06714 Top view 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 LB1895D DIP-30SD A06715 Top view No.5634-5/12 + – + – VIN1 VIN2 WIN1 WIN2 – + – + – UIN2 VH + UIN1 VCC1 Matrix FR For/Rev VCOMPO WCOMPO Hall power supply FC S/S Reference voltage Current limiter Thermal shutdown + – + – A06716 SIG GND VC VCREF VCREF VCC3 PWR GND WOUT VOUT UOUT RF VCC2 LB1895, 1895D LB1895 Block Diagram Output control No.5634-6/12 LB1895, 1895D Pin Descriptions Note: Numbers within ( Pin No. Symbol ) are for LB1895D Voltage Equivalent circuit Description 4 VCC2 4 V to 13.6 V Supply pin that provides pre-drive voltage for the source side. 6 (5) VCC3 2 V to 13.6 V Supply pin that provides voltage for the constant current control amplifier. 4 V to 6 V Supply pin that provides voltage for all circuits except the output transistor, source-side pre-drive, and constant current control amplifier. 8 (10) VCC1 9 (11) VCOMPO V-phase Hall element waveform Schmitt comparator output pin. VCC1 10kΩ 150µA 9 10 (11, 12) 10 (12) W-phase Hall element waveform Schmitt comparator output pin. WCOMPO A06717 U-phase Hall element input pin. Logic HIGH is represented by UIN1 > UIN2. VCC1 12 (13) UIN1 13 (14) 200Ω 1.2 V to VCC1 –1 V 12 (13) 200Ω 25µA 13 (14) 25µA UIN2 A06718 14 (15) VCC1 VIN1 25µA 15 (16) VIN2 1.2 V to VCC1 –1 V 16 (17) 17 (18) WIN1 14 16 200Ω (15) (17) 15 200Ω 25µA 17 (16) (18) 25µA A06719 WIN2 V-phase Hall element input pin, and V-phase Schmitt comparator input pin for reverse detection. Logic HIGH is represented by VIN1 > VIN2. W-phase Hall element input pin, and W-phase Schmitt comparator input pin for reverse detection. Logic HIGH is represented by WIN1 > WIN2. This pin provides the lower bias voltage for the Hall element. VCC1 75µA 18 18 (19) VH (19) 30kΩ 2kΩ A06720 Continued on next page. No.5634-7/12 LB1895, 1895D Continued from preceding page. Pin No. Symbol Voltage Equivalent circuit Description None of the circuits operate if the voltage on this pin is 0.7 V or less, or if this pin is open. When driving the motor, the voltage on this pin must be 2 V or more. VCC1 19 (20) S/S 75kΩ 19 0 V to VCC1 (20) 50kΩ A06721 20 (21) SIG GND Ground connection for all circuits except the outputs. Control loop frequency characteristics compensation pin. Connect a capacitor between this pin and GND to stop closed loop oscillation in the current control system. VCC1 2kΩ 22 (25) FC 22 (25) 20kΩ 5kΩ A06722 VCC1 23 (26) VCREF 2 V to 3 V 24 (27) 100µA 24 (27) VC 23 200Ω 200Ω Control reference voltage application pin. This voltage determines the control start voltage. (26) Speed control voltage application pin. V-type control, where: VC > VCREF = forward and VC < VCREF = reverse 100µA 0 V toVCC1 A06723 25 (29) WOUT 27 (30) PWR GND 1 VOUT 2 UOUT W-phase output pin. Output transistor ground. VCC2 7 (6) V-phase output pin. 25 1 U-phase output pin. 2 (29) 27 7 (6) RF (30) A06724 Upper output NPN transistor collector pin (three-phase common). Connect a resistor between VCC3 and the RF pin for current detection. When this voltage is detected, the constant current control and current limiter circuits function. No.5634-8/12 LB1895, 1895D S/S CTL reference voltage CTL signal LB1895 Sample Application Circuit (1) 0.1µF 0.1µF 0.047µF 28 27 26 25 24 23 21 22 20 19 18 17 16 15 9 10 11 12 13 14 L B 1 8 9 5 1 2 0.1µF 3 4 5 6 7 8 0.1µF 0.047µF 0.2 to 0.5Ω 0.1µF 12V 0.047µF 0.1µF 5V A06725 S/S CTL reference voltage CTL signal LB1895 Sample Application Circuit (2) 0.1µF 0.1µF 0.047µF 28 27 26 25 24 23 22 21 20 19 18 17 16 15 9 10 11 12 13 14 L B 1 8 9 5 1 2 3 4 5 0.1µF 0.1µF 0.1µF 6V 6 7 8 0.2 to 0.5Ω 0.1µF 5V 0.047µF 5V 0.047µF 0.1µF A06726 Between power supply and GND, Output and GND, and between Hall inputs: The capacitors may change, depending on the motor. The capacitor between the Hall inputs in particular may not be required with some motors. No.5634-9/12 LB1895, 1895D S/S CTL signal CTL reference voltage LB1895D Sample Application Circuit (1) 0.1µF 0.1µF 0.047µF 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 11 12 13 14 15 L B 1 8 9 5 D 1 2 0.1µF 3 4 5 6 7 8 9 10 0.1µF 0.047µF 0.2 to 0.5Ω 0.1µF 12V 0.047µF 0.1µF 5V A06727 S/S CTL reference voltage CTL signal LB1895D Sample Application Circuit (2) 0.1µF 0.1µF 0.047µF 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 11 12 13 14 15 L B 1 8 9 5 D 1 0.1µF 2 3 4 5 6 7 8 9 10 0.2 to 0.5Ω 0.1µF 0.1µF 6V 5V 0.047µF 5V 0.047µF 0.1µF Between power supply and GND, Output and GND, and between Hall inputs: The capacitors may change, depending on the motor. The capacitor between the Hall inputs in particular may not be required with some motors. A06728 No.5634-10/12 LB1895, 1895D LB1895,1895D — Example of using a comparator to detect the direction of rotation When VC ^ VCREF VCOMPO WCOMPO When VC % VCREF VCOMPO WCOMPO A06729 When the phasing is as shown above, the direction of rotation is determined to be ‘‘forward’’ if WCOMPO is low at the rising edge of VCOMPO, and ‘‘reverse’’ if WCOMPO is high at the rising edge of VCOMPO. 1) Reverse full braking method Braking is applied with VC = L until reverse rotation is detected. The moment that reverse rotation is detected, the driving power is turned off or a short pulse is input. 2) Intermittent braking method VCOMPO WCOMPO fig. 1 VC = 2.5V VC = 0V fig. 2 A06730 If braking is applied according to the value obtained by OR logic in VCOMPO and WCOMPO together, for example, reverse braking is applied according to the following timing. As a result, when the rotation speed is fast, braking is applied many times; at slower speeds, braking is applied fewer times. Furthermore, if the VCOMPO and WCOMPO logic combination is changed, the duty of VC = 0 V – 2.5 V also changes. No.5634-11/12 LB1895, 1895D Motor rotation speed The following graph illustrates the change in the rotation speed after braking is applied under methods 1 and 2 described above. Method 2 has less overshoot 2 1 Time after brakes were applied A06731 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 April, 1997. Specifications and information herein are subject to change without notice. No.5634-12/12