Ordering number : ENN7111 Monolithic Digital IC LB11862M Single-Phase Full-Wave Fan Motor Driver Overview The LB11862M is optimal for small fan applications, especially CPU cooling fans, due to its single-phase full-wave drive technique and the compact package. Low switching noise and effective motor drive are further advantages. Features •Support for 5V/12V dual power supply voltage. •Built-in regenerative circuit allows use of reverse-connection protection diode. •Built-in Hall amplifier with hysteresis (supports core without commutating pole). •Built-in lockup protection and automatic recovery circuits. •Latch-type lockup detection output (RD) is low during rotation and high during stop. •Hall bias pin and start/stop pin allow reduced current drain in standby mode. •Built-in thermal protection circuit. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCC max 17 V Maximum output current IOUT max 0.8 A Maximum output withstand voltage V VOUT max 17 RD maximum output withstand voltage VR max 17 V RD maximum output current IR max 5 mA mA HB maximum output current IB max 10 ST maximum input voltage VST max 15 V Allowable power dissipation Pd max 800 mW Mounted on the specified board* Operating temperature Topr -40 to +85 °C Storage temperature Tstg -55 to +150 °C *Specified board : 114.3 × 76.2 × 1.5 mm, glass epoxy. Any and all SANYO Semiconductor 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 Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor 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 products described or contained herein. N2206 / 83002 RM (IM) No.7111-1/5 LB11862M Allowable Operating Range at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC 3.8 to 16.8 V ST input high-level voltage STH 3 to 14 V ST input low-level voltage STL -0.3 to 0.4 V 0.2 to VCC-1.5 V Hall input common-mode input voltage VICM range Electrical Characteristics at Ta = 25°C, VCC = 5V, unless otherwise specified. Ratings Parameter Symbol Conditions min typ Operating mode (CT = L, ST = L) Circuit current Lock detection capacitor charging current Capacitor discharging current Capacitor charging/discharging current ratio ICC Unit max 12 17 mA Lock protecting mode (CT = H, ST = L) 2.5 4.0 mA Standby mode (ST = H) 110 150 µA ICT1 VCT = 0.2 V 1.5 2.1 3.0 µA ICT2 VCT = 3.0 V 0.21 0.35 0.50 µA RCT RCD = ICT1/ICT2 5.0 6.0 8.0 - CT charging voltage VCT1 2.55 2.75 2.95 V CT discharging voltage VCT2 1.6 1.8 2.0 V Output low-level voltage VOL IO = 200 mA 0.2 0.3 V Output high-level voltage VOH IO = 200 mA Hall input sensitivity VHN Zero peak value. (Including offset, hysteresis) 7 15 mV RD output pin low-level voltage VRD IRD = 5 mA 0.1 0.3 V RD output pin leakage current IRDL VRD = 15 V 30 µA HB output low-level voltage VHBL IHB = 5 mA 1.0 1.3 V IST VST = 5 V 75 100 µA ST pin input current 3.9 4.1 V Package Dimensions unit : mm 3086B-MFP10S (225mil) [ LB11862M ] No.7111-2/5 LB11862M Truth Table ST H L IN- IN+ CT OUT1 OUT2 RD HB Mode - off off off off Standby H L L H L L Operating off off off L Lock protection - - H L L H L H (The RD output is latched at “L”-level in operating mode and “H”-level in stop mode.) Pin Assignment IN- RD IN+ HB LB11862M CT ST OUT1 VCC GND OUT2 Top view Sample Application Circuit D1 C2 VCC H INRD IN+ OUT1 HB OUT2 C1=0.47 to 1µF ST Motor coil CT GND (1) D1 is used to prevent IC destruction caused by reverse-connection. It can be omitted if no problems are expected. (2) C2 is used to apply a kickback regenerative current when using the IC with the coil current over 500 mA. (3) When CT is not used, it should be connected to ground. (4) When RD, ST, and HB are not used, they should be left open. No.7111-3/5 LB11862M Block Diagram No.7111-4/5 LB11862M Specifications of any and all SANYO Semiconductor 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 Semiconductor 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 Semiconductor 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 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 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 Semiconductor 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 August, 2002. Specifications and information herein are subject to change without notice. PS No.7111-5/5