Ordering number : EN6186 LB1978V Monolithic Digital IC LB1978V Three-Phase Half-Wave Sensorless Motor Driver for Headphone Stereos Functions and Features Package Dimensions • Three-phase sensorless motor driver • Built-in speed control • Built-in reference voltage and forward/reverse switching pin • Soft switching • Built-in short brake drive pin unit: mm 3191-SSOP30 [LB1978V] 16 1 15 0.5 7.6 5.6 1.0 30 0.15 0.1 1.6max 9.95 0.22 0.65 0.43 SANYO : SSOP30 Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Maximum supply voltage Output transistor withstand voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol Vcc max Vsus Io max Pd max Topr Tstg Conditions Ratings 2.0 4 0.6 0.4 0 to 60 –40 to +125 Unit V V A W ˚C ˚C Ratings 1.0 to 1.7 Unit V Tj = 125˚C Allowable Operating Ranges at Ta = 25˚C Parameter Power supply voltage Symbol Vcc Conditions 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 Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 63099RM(KI) No. 6186-1/9 LB1978V Electrical Characteristics at Ta = 25˚C, Vcc = 1.2V, in the specified test circuit Parameter Power supply current Reference voltage Reference voltage characteristics Reference voltage load characteristics Oscillator cycle Rotation switching load characteristics Rotation detection accuracy COM voltage F side output saturation voltage S side output saturation voltage S/S pin input High level voltage S/S pin input Low level voltage F/S DR pin ON voltage F/S DR pin OFF voltage TC pin pull-in voltage BR1 ON voltage BR1 OFF voltage BRsat voltage CI rise voltage CI hysteresis width IRF voltage VI output current PV pin voltage ∆IFC/∆VVI ratio Output transistor OFF voltage Output transistor ON voltage Symbol Icc Vref ∆Vref / ∆Vcc ∆Iref ∆Vref ∆Iref TS TF/S NF/S VCOM– Vsat1 Vsat2 VSSH VSSL VLon VLoff VTC1 VTC2 VBRon VBRoff VBRsat VCI ∆VCI VIRF IVI VPV ∆IFC/∆VVI VOUT OFF VOUT ON Conditions START pin H, RIRF = 180 kΩ START pin L, VBR = 0V Ratings typ 6.8 0 0.725 0.755 max 10 10 0.785 1.0 2.0 min Vcc = 1.0 to 1.7V Iref = 0 to –50 µA –0.2 –0.06 CS = 1500 pF CS = 1500 pF, RIRF = 180 kΩ *Target TS = 0.60 ms *Target RCOM = 1 kΩ Vcc = 1.0V, Im = 0.3A Vcc = 1.0V, Im = 0.2A 0.52 7.70 0.6 –16 12 25 0.17 0.12 Io = 6 mA, VBR1 = 1.2V RIRF = 180 kΩ VVI = 0.3V, VIV = GND 0.620 60 0.725 26 0.720 150 Vcc–0.3 %/V 0.68 10.9 ms ms +16 38 0.30 0.25 % mV V V V V V V mV mV V V V V mV V µA V µA/V V V 0.3 0.2 Vcc–0.3 80 160 0.9 mA µA V mV/µA 0.9 F/S = H F/S = L Unit 110 220 150 300 0.15 0.650 80 0.755 30 0.755 210 0.3 0.3 0.680 100 0.785 34 0.785 250 0.3 Note: Items shown to be “Target” are not measured. No. 6186-2/9 LB1978V Allowable power dissipation, Pd max (W) Pd max – Ta 0.4 0.26 0 25 60 Ambient temperature, Ta – (°C) Vcc VREF S/S DR F/S W1 V1 U1 PGND W2 V2 U2 DU SGND P3 Pin Assignment 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 FC OSC COM IRF CI PW PV IV VI BR1 BR2 TC1 TC2 P1 P2 LB1978V Top view No. 6186-3/9 LB1978V Equivalent Circuit Block Diagram OSC DR TC2 TC1 P1 P2 P3 BR1 Vcc Brake circuit BR2 U1 Divider S/S Current bias Vref Reference voltage W1 U2 V2 W2 Startup switching Startup detection COM Soft switch Logic circuitry Constant current circuit FG pulse IRF V1 Drive select + predriver Rotation detector Oscillator PGND DU FC Soft switching Speed select divider d/dt F/S CI SGND Current buffer Pulse PW Comparator PV IV VI VI Sample Application Circuit 0.01 µF 1µF 30 29 28 Vcc VREF S/S 100Ω 0.01 µF 0.01 µF 27 26 25 24 23 22 21 DR F/S W1 V1 U1 PGND W2 20 19 18 17 16 V2 U2 DU SGND P3 LB1978V FC OSC COM IRF 1 2 3 CI PW PV IV VI BR1 BR2 TC1 TC2 P1 P2 5 6 7 8 9 10 14 15 4 2.2µF 180 kΩ 6.2kΩ 0.1µF 1500pF 0.01µF 1kΩ 68kΩ 11 12 13 180 kΩ 20kΩ 0.33µF 680kΩ 0.1µF 0.033µF No. 6186-4/9 LB1978V Pin Description Pin number 1 Pin name FC Equivalent circuit Pin function Oscillator and ripple suppression pin. Vcc The higher the capacitance connected to FG, the more effectively will ripple components be suppressed. 1 PGND 2 OSC Startup pulse cycle and drive switching cycle setting pin. Vcc Increased capacitance will result in higher startup pulse cycle and drive switching cycle. 2 SGND 3 COM Vcc 3 10kΩ Startup waveform detector offset setting pin. RCOM = 1 kΩ results in approx. 25 mV offset at startup 120µA PGND 4 IRF Oscillator circuit and F-V servo circuit internal current setting pin. Vcc 4 25µA SGND 5 CI Vcc Speed adjustment pin using CR oscillation based on FG pulse edge detection. 5 SGND Continued on next page No. 6186-5/9 LB1978V Continued from preceding page Pin number 6 Pin name PW Equivalent circuit Pin function CI pin waveform and reference voltage comparator output pin. Vcc 6 PGND 7 PV Current buffer input/output pin. Vcc 1kΩ 7 SGND 8 IV Current-to-voltage converter comparator input pin. Vcc 1kΩ 8 SGND 9 VI Voltage-to-current converter input pin. Vcc 9 1kΩ Speed increases when VI pin voltage is higher than reference voltage and decreases when VI pin voltage is lower than reference voltage. SGND 10 BRI Vcc Brake bias pin. 10 When S/S pin is Low and BR1 pin is 0.9V or higher, brake drive pin BR2 goes ON. SGND Continued on next page No. 6186-6/9 LB1978V Continued from preceding page Pin number 11 Pin name BR2 Equivalent circuit Pin function Brake drive pin. Vcc When S/S pin is Low and BR1 pin is 0.9V or higher, brake drive is activated. This is an open-collector output. 11 SGND 12 13 TC1 TC2 Motor current rise/fall slope setting pins. Vcc Setting value changes depending on the High or Low status of the F/S pin. 12 13 SGND 14 15 16 P1 P2 P3 Internal operation measurement pins which shape the current waveform. Must be left open for use. Vcc 14 15 16 SGND 17 SGND 18 19 20 21 DU U2 V2 W2 Signal ground pin. Separate from power supply ground. Vcc 19 20 21 DU is base pin for U low-speed output transistor. U2, V2, and W2 are pins for connection to low-speed motor coils. 18 22 PGND 22 PGND Power supply ground. Continued on next page No. 6186-7/9 LB1978V Continued from preceding page Pin number 23 24 25 Pin name U1 V1 W1 Equivalent circuit Pin function U1, V1, and W1 are pins for connection to high-speed motor coils. Vcc 23 24 25 22 PGND 26 F/S High-speed/low-speed mode select pin. Vcc Vcc –1.0V or lower: high-speed (fast) Vcc –0.3V or higher: low-speed (slow) 26 SGND 27 DR Vcc Rotation direction select pin. 27 Vcc –0.3V or higher: phase sequence U -> V -> W Vcc –1.0V or lower: phase sequence U -> W -> V SGND 28 S/S Start/stop pin. 0.9V or higher: Start High active. Vcc 28 SGND 29 Vref Reference voltage pin. Reference voltage is 0.75V. Vcc 50µA 29 SGND 30 Vcc Power supply pin. No. 6186-8/9 LB1978V 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 June, 1999. Specifications and information herein are subject to change without notice. PS No. 6186-9/9