Ordering number : EN6203A Monolithic Digital IC LB1868M 2-phase Brushless Fan Motor Driver Overview The LB1868M is a 2-phase unipolar brushless motor driver. With only a few peripheral parts, lockup protection and automatic recovery can be implemented. The IC can be configured for 12V or 24V operation and a wide range of variations, from Low speed to H-High speed and from 60cm to 120cm square using the same PCB. This makes it easy to design highly reliable fan motor installations. Features • Output protection Zener diode with variable withstand voltage Z1, Z2 pins open: VOLM = 57V (24V specification) Z1, Z2 pins shorted: VOLM = 32V (12V specification) External Zener diode connected across Z1 − VCC pins: support for fans with large drive current • External resistor allows configuration for 12V or 24V • Direct Hall element connection possible (built-in Hall amplifier with hysteresis supports core without auxiliary electrode) • Built-in output transistor with 1.0A output current (strengthened negative-current support for core without auxiliary electrode) • Built-in rotation detection function: Low during rotation and High during stop • Built-in lockup protection with automatic recovery • ST pin for motor stop/drive (for standby mode of copiers etc.) • FG output pin for rotation detection • BC pin for kickback noise reduction (with 2 external capacitors) • Built-in thermal shutdown Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum input current Symbol ICC max Conditions t ≤ 20ms Ratings Unit 200 Internal mA Maximum applied output voltage VOUT max Maximum output current IOUT max 1.0 V A Current flowing into RD, FG IRD max 10 mA V RD, FG applied voltage VRD max 30 ST applied voltage VST max 7.5 V Allowable power dissipation Pd max 800 mW Operating temperature Topr -30 to +80 °C Storage temperature Tstg -55 to +150 °C Mounted on a specified board * * Specified board: 20mm × 15mm × 1.5mm, glass epoxy board. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. 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. 31109 MS / 83100RM(KI) No.6203-1/5 LB1868M Allowable Operating Ranges at Ta = 25°C Parameter Symbol Conditions Ratings Unit Input current range ICC 6.0 to 50 Common mode input voltage range VICM 0.2 to VIN-1.5 mA V ST High voltage VSTH 4.5 to 7.0 V ST Low voltage VSTL 0 to 0.5 V Electrical Characteristics at Ta = 25°C, ICC = 10mA Parameter Symbol Ratings Conditions min Output limiter withstand voltage Output saturation voltage typ Unit max VOLM1 Z1, Z2 open 54 57 60 V VOLM2 Z1, Z2 short 31 33 35 V VOsat1 IO = 0.5A 0.95 1.2 V VOsat2 IO = 1.0A VIN voltage VIN ICC = 7.0mA Hall input sensitivity (at zero peak) VHN Including offset and hysteresis 6.4 1.15 1.5 V 6.7 7.0 V 20 mV RD, FG output saturation voltage VRDsat IRD = 5mA 0.1 0.3 V CT drain current IC1 C = GND 2.7 3.8 4.9 µA CT discharge current IC2 C = VIN 0.19 0.30 0.41 µA Comp input threshold voltage VTH1 0.77 0.8VIN 0.83 V VTH2 0.42 0.45VIN 0.48 V 80 120 µA ST input current IST VST = 5V Thermal protection operating TSD Design target value * 180 °C ∆TSD Design target value * 40 °C temperature Thermal protection circuit hysteresis * Design target value, Do not measurement. Package Dimensions unit : mm (typ) 3111A Pd max -- Ta 8.0 14 0.63 4.4 6.4 8 1 1.7MAX 7 1.0 0.35 0.15 0.1 (1.5) (1.0) SANYO : MFP14S(225mil) Allowable power dissipation, Pd max -- W 1.0 Specified board: 20×15×1.5mm3 glass epoxy board. 0.8 0.6 0.4 0.2 0 -30 -20 0 20 40 60 80 100 Ambient temperature, Ta -- °C No.6203-2/5 LB1868M Pin Assignment 14 VIN IN+ 2 13 RD CT 3 12 FG LB1868M IN− 1 ST 4 BC 5 11 Z2 10 Z1 OUT1 6 9 OUT2 8 NC GND 7 Top view Pin Function Pin No. Pin name Function 1 IN− Hall input + pin. Hysteresis amplifier 2 IN+ Hall input − pin. Hysteresis amplifier 3 CT Lockup protection time setting capacitor pin (0.47 to 4.7µF). 4 ST Start/stop pin. 5 BC Output transistor common base pin. 6 OUT1 Output 1 pin. 9 OUT2 Output 2 pin. 7 GND GND pin. 10 Z1 External Zener diode pin (external Zener diode to be connected between power supply and Z1). 11 Z2 Kickback absorption voltage alteration pin (shorted to Z1: 12V operation). 12 FG Rotation frequency detector pin. 13 RD Lockup detection pin (latch type). 14 VIN Regulated power supply input pin (limiting resistor to be inserted between power supply and VIN). Truth Table ST H L or OPEN IN+ IN− CT OUT1 OUT2 RD FG H L L H H L L L H L H H L H H L L H L L L L H L L H L H H L H H H H L L H H H H H H * RD is a latch type output No.6203-3/5 LB1868M Block Diagram VIN VCC L1 Thermal shutdown R1 L2 OUT1 R2 IN+ H IN− Control block BC Z1 ST Constant current source Z2 OUT2 CT FG C1 RD 0.47 to 10µF GND Application Circuit Example (1) 12V supply voltage VCC 12V 330Ω 14 VIN 2kΩ 13 RD 12 FG 11 Z2 10 Z1 9 OUT2 8 NC OUT1 6 GND 7 LB1868M IN− 1 H IN+ 2 CT 3 ST 4 BC 5 0.47µF No.6203-4/5 LB1868M (2) 24V supply voltage VCC 24V 1.2kΩ 14 VIN 2kΩ 13 RD 11 Z2 12 FG 10 Z1 9 OUT2 8 NC BC 5 OUT1 6 GND 7 10 Z1 9 OUT2 8 NC OUT1 6 GND 7 LB1868M IN− 1 IN+ 2 H CT 3 ST 4 0.47µF (3) High-Power Fan (120mm-HH-Speed) VCC 12V (24V) 330Ω (1.2kΩ) 14 VIN 2kΩ VZ=12V (24V) 13 RD 12 FG 11 Z2 LB1868M IN− 1 H IN+ 2 CT 3 ST 4 BC 5 0.47µF SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd. products described or contained herein. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents 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 Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require 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 consent of SANYO Semiconductor 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 Semiconductor Co.,Ltd. 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. Upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third party. SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of March, 2009. Specifications and information herein are subject to change without notice. PS No.6203-5/5