LB1895

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] Functions and Features . Current linear drive . V-type control amplifier built in . Because the power supply for the bias circuit on the upper . . . . . . 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 15 5.6 1.0 0.2 0.1 1 0.8 2.7 0.3 14 15.2 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 1.8max 0.5 7.6 LB1895, 1895D Specifications Maximum Ratings at Ta = 25 °C Parameter Maximum supply voltage 1 Maximum supply voltage 2 Maximum supply voltage 3 Applied output voltage Applied input voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC1 max VCC2 max VCC3 max VO max VI max IO max Indepent IC [LB1895] Pd max Topr Tstg Glass epoxy board (114.3 × 762 × 1.5 mm) [LB1895D] Conditions Ratings 7 14.4 14.4 14.4 VCC1 1.0 0.5 2.4 –20 to +75 –55 to +150 Unit V V V V V A W W °C °C Operating Conditions at Ta = 25 °C Parameter Supply voltage Symbol VCC1 VCC2 VCC3 ^ VCC1 Conditions Ratings 4 to 6 4 to 13.6 2 to 13.6 Unit V V V Application Examples at Ta = 25 °C (1) 12 V model Power supply pins VCC1 VCC2 = VCC3 REG. voltage UN-REG. voltage Conditions Ratings 4 to 6 4 to 13.6 Unit V V (2) 5 V model Power supply pins VCC1 = VCC3 VCC2 REG. voltage Boost voltage or REG. voltage (Note) Conditions Ratings 4 to 6 4 to 13.6 Unit V 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 [Supply current] Supply current 1 Supply current 2 Supply current 3 Output quiescent current 1 Output quiescent current 2 Output quiescent current 3 [Output] Upper saturation voltage 1 Lower saturation voltage 1 Upper saturation voltage 2 Lower saturation voltage 2 Current limiter setting voltage [Hall Amplifier] Hall amplifier common-mode input voltage range Hall amplifier input bias current Minimum Hall input level [S/S pin] High-level voltage Low-level voltage Input current LEAK current [Control stage] VC pin input current VCREF pin input current Voltage gain Rising threshold voltage Rising threshold voltage width [Hall supply] Hall supply voltage Allowable current [Thermal shutdown] Operating temperature Hysteresis [Hall comparator] Input offset voltage Input hysteresis Output ON voltage Output OFF voltage Output current (sink) VHCIoffset VHCIhys VOU VOD ISINK Note 4.7 3 3 8 10 15 0.3 mV mV V V mA TTSD ∆TTSD *D *D 150 180 15 210 °C °C VH IH IH = 5 mA 20 1.0 1.6 V mA IVC IVCREF VGCO VCTH ∆ VCTH VC = VCREF = 2.5 V VC = VCREF = 2.5 V ∆VRF/∆VC VCREF = 2.5 V VCREF = 2.5 V 0.2 2.35 50 1 1 0.25 3 3 0.3 2.65 150 µA µA Times V mV VS/SH VS/SL IS/SI IS/SL VS/S = 5 V VS/S = 0 V –30 2.0 VCC1 0.7 200 V V µA µA VHCOM IHIB VHIN 60 1.2 1 VCC1 –1.0 2 V µA mVp-p VOU1 VOD1 VOU2 VOD2 VCL IO = –0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V IO = 0.5 A, VCC1 = 5 V, VCC2 = VCC3 = 12 V IO = –0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V IO = 0.5 A, VCC1 = VCC3 = 5 V, VCC2 = 12 V RRF = 0.43 Ω 0.25 0.8 0.3 0.3 0.3 0.32 1.3 0.5 0.5 0.5 0.4 V V V V V ICC1 ICC2 ICC3 ICC1OQ ICC2OQ ICC3OQ VC = VCREF VC = VCREF VC = VCREF VS/S = 0 V VS/S = 0 V VS/S = 0 V 4 0 150 7 0.5 250 200 30 30 mA mA µA µA µA µA Symbol Conditions min typ max Unit 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 LB1895, 1895D Allowable power dissipation, Pd max – W 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 H H L L H L V H L L H L H W L L H L 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 28 1 VOUT 1 27 2 WOUT 26 3 NC 4 VC 5 VCREF VCREF PWR GND UOUT NC VCC2 NC 6 VCC3 7 RF VOUT NC 30 UOUT 2 28 3 27 4 26 5 25 6 24 7 23 8 FRAME GND 22 FRAME GND SIG GND S/S VH WIN2 WIN1 VIN2 8 VCC1 VCOMPO WCOMPO NC UIN1 UIN2 VIN1 9 10 11 12 13 14 15 DIP-30SD 16 17 18 19 20 21 FRAME GND 9 10 11 12 13 14 FRAME GND FC 25 24 23 22 NC VCC2 VCC3 RF FRAME GND FRAME GND FRAME GND VCC1 VCOMPO WCOMPO UIN1 UIN2 VIN1 PWR GND NC WOUT VC VCREF VCREF LB1895 Pin Assignment 29 FC LB1895 FRAME GND 21 LB1895D NC 20 19 18 17 16 15 SIG GND S/S VH WIN2 WIN1 VIN2 LB1895, 1895D A06715 Top view HSOP-28 A06714 Top view No.5634-5/12 VCC1 RF + – VCC2 LB1895 Block Diagram UIN1 UIN2 VIN1 + – Matrix FR Output control VIN2 UOUT VOUT WOUT WIN1 + – WIN2 Hall power supply Current limiter – PWR GND VCC3 VH For/Rev + – + LB1895, 1895D – + VCREF VCREF VC + – Reference voltage Thermal shutdown SIG GND VCOMPO WCOMPO FC S/S A06716 No.5634-6/12 LB1895, 1895D Pin Descriptions Note: Numbers within ( Pin No. 4 6 (5) Symbol VCC2 VCC3 ) are for LB1895D Voltage Equivalent circuit Description Supply pin that provides pre-drive voltage for the source side. Supply pin that provides voltage for the constant current control amplifier. Supply pin that provides voltage for all circuits except the output transistor, source-side pre-drive, and constant current control amplifier. VCC1 4 V to 13.6 V 2 V to 13.6 V 8 (10) VCC1 4 V to 6 V 9 (11) VCOMPO 150µA 10kΩ 9 10 (11, 12) V-phase Hall element waveform Schmitt comparator output pin. 10 (12) WCOMPO W-phase Hall element waveform Schmitt comparator output pin. A06717 VCC1 12 (13) UIN1 200Ω U-phase Hall element input pin. Logic HIGH is represented by UIN1 > UIN2. 1.2 V to VCC1 –1 V 13 (14) UIN2 12 (13) 13 (14) 200Ω 25µA 25µA A06718 14 (15) VIN1 25µA VCC1 15 (16) VIN2 1.2 V to VCC1 –1 V 14 16 (15) (17) 200Ω 200Ω 15 17 (16) (18) A06719 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. 16 (17) WIN1 WIN2 25µA 25µA 17 (18) VCC1 75µA 18 18 (19) VH 30kΩ 2kΩ (19) A06720 Continued on next page. No.5634-7/12 LB1895, 1895D Continued from preceding page. Pin No. Symbol Voltage Equivalent circuit VCC1 19 (20) 75kΩ 50kΩ A06721 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. Ground connection for all circuits except the outputs. 19 (20) S/S 0 V to VCC1 20 (21) SIG GND VCC1 2kΩ 22 (25) FC 22 (25) 20kΩ 5kΩ A06722 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 23 (26) VCREF 2 V to 3 V 24 (27) 200Ω 200Ω 23 (26) Control reference voltage application pin. This voltage determines the control start voltage. 100µA 100µA 24 (27) VC 0 V toVCC1 A06723 Speed control voltage application pin. V-type control, where: VC > VCREF = forward and VC < VCREF = reverse 25 (29) 27 (30) 1 2 WOUT PWR GND VOUT UOUT 25 1 (29) 27 2 VCC2 7 (6) W-phase output pin. Output transistor ground. V-phase output pin. U-phase output pin. 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. 7 (6) RF (30) A06724 No.5634-8/12 LB1895, 1895D LB1895 Sample Application Circuit (1) CTL reference voltage CTL signal 0.1µF 0.1µF 0.047µF 28 27 26 25 24 23 22 21 20 19 18 17 16 15 LB1895 1 2 3 4 5 6 7 8 9 10 S/S 11 12 13 14 0.1µF 0.1µF 0.2 to 0.5Ω 0.1µF 0.047µF 0.1µF 0.047µF 12V 5V A06725 LB1895 Sample Application Circuit (2) CTL reference voltage CTL signal 0.1µF 0.1µF 0.047µF 28 27 26 25 24 23 22 21 20 19 18 17 16 15 LB1895 1 2 3 4 5 6 7 8 9 10 S/S 11 12 13 14 0.1µF 0.1µF 0.1µF 0.2 to 0.5Ω 0.1µF 5V 5V 0.1µF 0.047µF 0.047µF 6V 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 LB1895D Sample Application Circuit (1) CTL reference voltage CTL signal 0.1µF 0.1µF S/S 0.047µF 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 LB1895D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0.1µF 0.1µF 0.2 to 0.5Ω 0.1µF 0.047µF 0.1µF 0.047µF 12V 5V A06727 LB1895D Sample Application Circuit (2) CTL reference voltage CTL signal 0.1µF 0.1µF S/S 0.047µF 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 LB1895D 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0.1µF 0.1µF 0.2 to 0.5Ω 0.1µF 6V 5V 5V 0.1µF 0.047µF 0.047µF 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. Intermittent braking method 2) 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 The following graph illustrates the change in the rotation speed after braking is applied under methods 1 and 2 described above. Motor rotation speed 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