Ordering number : EN5974 Monolithic Digital IC LB1980H Three-Phase Brushless Motor Driver for VCR Capstan Motors Overview Package Dimensions The LB1980H is a 3-phase brushless motor driver that is particularly appropriate for VCR capstan motor drivers. unit: mm 3233-HSOP28H Functions [LB1980H] · 3-phase full-wave drive · Built-in torque ripple correction circuit (variable correction ratio) · Current limiter circuit · Upper and lower side output stage over-saturation prevention circuit that does not require external capacitors. · FG amplifier · Thermal shutdown circuit Allowable power dissipation, Pdmax — W SANYO: HSOP28H Independent IC Ambient temperature, Ta — °C Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO products described or contained herein. SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN O3098RM (OT) No. 5974-1/8 LB1980H Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Maximum output current Allowable power dissipation Symbol Conditions Ratings Unit VCC max 7 V VS max 24 V IO max 1.3 A 1.81 W Pd max Mounted on a 71.6 × 114.3 × 1.6 mm glass Epoxy printed circuit board 0.77 W Operating temperature Topr Independent device –20 to + 75 °C Storage temperature Tstg –55 to + 150 °C Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings VS Supply voltage VCC Hall input amplitude GSENSE pin input range VHALL VGSENSE Between the Hall inputs With respect to the control system ground Unit 5 to 22 V 4.5 to 5.5 V ±30 to ±80 mVo-p –0.20 to + 0.20 V Electrical Characteristics at Ta = 25°C, VCC = 5 V, VS = 15 V Parameter VCC supply current Ratings Symbol Conditions ICC RL = ∞, VCTL = 0 V, VLIM = 0 V (Quiescent) 12 18 mA VOsat1 IO = 500 mA, Rf = 0.5 Ω, Sink + Source VCTL = VLIM = 5 V (With saturation prevention) 2.1 2.6 V VOsat2 IO = 1.0 A, Rf = 0.5 Ω, Sink + Source VCTL = VLIM = 5 V (With saturation prevention) 2.6 3.5 V 1.0 mA min typ Unit max [Outputs] Output saturation voltage Output leakage current IOleak [FR] FR pin input threshold voltage FR pin input bias current VFSR 2.25 IB (FSR) –5.0 2.50 2.75 V µA [Control] VCREF 2.05 CTLREF pin input range CTLREF pin voltage VCREFIN 1.50 CTL pin input bias current IB (CTL) 2.15 With VCTL = 5 V and the CTLREF pin open 2.25 V 3.50 V 4.0 µA CTL pin control start voltage VCTL (ST) With Rf = 0.5 Ω, VLIM = 5 V, IO ≥ 10 mA, Hall input logic fixed (U, V, W = H, H, L) 2.00 2.15 2.30 V CTL pin control Gm Gm (CTL) With Rf = 0.5 Ω, ∆IO = 200 mA, Hall input logic fixed (U, V, W = H, H, L) 0.46 0.58 0.70 A/V Voff (LIM) With Rf = 0.5 Ω, VCTL = 5 V, IO ≥ 10 mA, Hall input logic fixed (U, V, W = H, H, L) 140 200 260 mV IB (LIM) With VCTL = 5 V and the VCREF pin open –2.5 With Rf = 0.5 Ω, VCTL = 5 V, VLIM = 2.06 V, Hall input logic fixed (U, V, W = H, H, L) 830 [Current Limiter] LIM current limit offset voltage LIM pin input bias current LIM pin current control level ILIM µA 900 970 mA +6 mV 1.0 3.0 µA 3.3 V [Hall Amplifier] Hall amplifier input offset voltage Voff (HALL) Hall amplifier input bias current IB (HALL) Hall amplifier common-mode input voltage range VCM (HALL) –6 1.3 [TRC] Torque ripple correction ratio TRC ADJ pin voltage VADJ For the high and low peaks in the Rf waveform when IO = 200 mA. (Rf = 0.5 Ω, with the ADJ pin open)*1 9 2.37 2.50 % 2.63 V [FG Amplifier] FG amplifier input offset voltage FG amplifier input bias current FG amplifier output saturation voltage FG amplifier voltage gain FG amplifier common-mode input voltage Voff (FG) –8 IB (FG) +8 –100 nA Sink side, for the load provided by the VOsat (FG) internal pull-up resistor VG (FG) For the open loop state with f = 10 kHz VGM (FG) Notes : 1. The torque ripple correction ratio is determined as follows from the Rf voltage waveform. 2. Parameters that are indicated as design target values in the conditions column are not tested. 41.5 0.5 mV 44.5 0.5 V 47.5 dB 4.0 V Continued on next page. No. 5974-2/8 LB1980H Continued from preceding page. Parameter Symbol Ratings Conditions min typ Unit max [Saturation] The voltages between each OUT and VOsat (DET) Rf pair when IO = 10 mA, Rf = 0.5 Ω, and VCTL = VLIM = 5 V Saturation prevention circuit lower side voltage setting 0.175 0.25 0.325 V [TSD] TSD Design target value*2 180 °C ∆TSD Design target value*2 20 °C TSD operating temperature Hysteresis width Notes : 1. The torque ripple correction ratio is determined as follows from the Rf voltage waveform. 2. Parameters that are indicated as design target values in the conditions column are not tested. For each Hall logic setting Ground level Correction ratio = 2 × (Vp – Vb) 100 × (%) Vp – Vb Truth Table and Control Functions Source → Sink Phase V → Phase W 1 Phase W → Phase V Phase U → Phase W 2 Phase W → Phase U Phase U → Phase V 3 Phase V → Phase U Phase W → Phase V 4 Phase V → Phase W Phase W → Phase U 5 Phase U → Phase W Phase V → Phase U 6 Phase U → Phase V Hall input U V W H H L H H L L L L L L H H L H H H L FR H L H Note: In the FR column, “H” refers to a voltage of 2.75 V or higher, and “L” refers to 2.25 V or lower (when VCC = 5 V.) Note: In the Hall input column, “H” refers to the state in the corresponding phase where the + input is at a potential at least 0.01 V higher than the – input, and “L” refers to the state where the – input is at a potential at least 0.01 V higher than the + input. L H L H L H L H L Note: Since the drive technique adopted is a 180° technique, phases other than the sink and source phase do not turn off. IOUT IOUT Control Function and Current Limiter Function Slope: 0.50 A/V (typical) Control Characteristics Control Limiter Characteristics No. 5974-3/8 LB1980H Pin Descriptions Pin No. Pin 27 28 1 UOUT VOUT WOUT Function U phase output V phase output W phase output Equivalent circuit (Spark killer diodes are built-in.) Output current detection. The control block current limiter operates using the resistor Rf connected between these pins and ground. Also, the lower side saturation prevention circuit and the torque ripple correction circuit operate based on the voltages across this resistor. It is especially important to note that, since the saturation prevention level is set using this voltage, the lower side saturation prevention circuit will become less effective in the high current region if the value of Rf is lowered excessively. Also, the PWR and SENSE pins must be connected together. 4 24 Rf (SENSE) Rf (PWR) 22 VS 5 GSENSE 6 FR Forward/reverse selection. The voltage applied to this pin selects the motor direction (forward or reverse). (Vth = 2.5 V at VCC = 5 V (typical)) 23 ADJ Used for external adjustment of the torque ripple correction ratio. Apply a voltage externally with a low-impedance circuit to the ADJ pin to adjust the correction ratio. The correction ratio falls as the applied voltage is increased, and increases as the applied voltage decreases. The torque ripple correction ratio can be modified by factors in the range 0 to 2 times the ratio that applies when his pin is left open. (The pin voltage is set to about VCC/2 internally, and the input impedance is about 5 kΩ.) 7 GND Ground for all circuits other than the output transistors. The lowest potential of the output transistors is that of the Rf pin. 8 FGIN+ Input used when the FG amplifier is used as an inverting input. A feedback resistor must be connected between FGOUT and this pin. 9 FGIN– Noninverting input used when the FG amplifier is used as a differential input amplifier. No bias is applied internally. 10 FGOUT FG amplifier output. There is an internal resistive load. 14 FC OUT Lower side saturation prevention circuit input block Output block power supply Ground sensing. The influence of the common ground impedance on Rf can be excluded by connecting this pin to nearest ground for the Rf resistor side of the motor ground wiring that includes Rf. (This pin must not be left open.) Speed control loop frequency characteristics correction. Continued on next page. No. 5974-4/8 LB1980H Continued from preceeding page. Pin No. 11 Pin Function CTL Speed control input. The control implemented is fixed current drive controlled by current feedback from Rf. Gm = 0.58/V (typical) when Rf = 0.5 Ω Equivalent circuit Control reference voltage. While this pin is set to about 0.43 × VCC internally, this voltage can be modified by applying a voltage from a low-impedance circuit. (The input impedance is about 4.3 kΩ). 12 CTLREF 13 LIM Current limiter function control. The output current can be varied linearly by applying a voltage to this pin. The slope is 0.5 A/V (typical) when Rf = 0.5 Ω. 15 16 UIN+ UIN– U phase Hall element inputs. Logic high is defined as states where IN+ > IN–. 17 18 VIN+ VIN– V phase Hall element inputs. Logic high is defined as states where IN+ > IN–. 19 20 WIN+ WIN– W phase Hall element inputs. Logic high is defined as states where IN+ > IN–. 21 VCC Power supply for all internal blocks other than the output block. This voltage must be stabilized so that noise and ripple do not enter the IC. Pin Assignment No. 5974-5/8 LB1980H Block Diagram Synthesized output logarithmic compression block Hall input synthesis block (linear matrix) Output stage Antilogarithm conversion and differential distribution Upper side saturation prevention control Drive distribution circuit and lower side saturation prevention circuit Differential distribution and torque ripple correction block Control amplifier Feedback amplifier About 0.43 × VCC Forward/ reverse selection FG amplifier Reference voltage No. 5974-6/8 Hall output GaAs Hall devices are recommended. Hall output Hall output VCC/2 bias Hall output Forward/reverse command voltage pin Torque command voltage pin CTLREF voltage pin Current limiter setting voltage pin Voltage applied to the ADJ pin Power system ground LB1980H Sample Application Circuit No. 5974-7/8 LB1980H Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer’s products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer’s products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO products (including technical data, services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co., Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the “Delivery Specification” for the SANYO product that you intend to use. 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 October, 1998. Specifications and information herein are subject to change without notice. PS No. 5974-8/8