LB1862

Ordering number : ENN6208A LB1862 Monolithic Digital IC LB1862 Fan Motor Single-Phase Full-Wave Driver Overview Single-phase full-wave drive design and a compact package make this IC optimal for small fans (especially CPU cooling fans). Low switching noise and effective motor drive are further advantages. Package Dimensions unit: mm 3098B-DIP10S [LB1862] 10 6 • Support for 5V/12V dual power supply voltage • Built-in regenerative circuit allows use of reverseconnection protection diode • Built-in Hall amplifier with hysteresis (supports core without auxiliary electrode) • 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 1 9.4 5 0.51min 0.48 0.95 1.14 1.78 3.2 3.0 3.9max SANYO : DIP10S Specifications Absolute Maximum Ratings at Ta = 25˚C Parameter Maximum supply voltage Maximum output current Maximum output withstand voltage RD maximum output withstand voltage RD maximum output current HB maximum output current ST maximum input voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IOUT max VOUT max VR max IR max IB max VST max Pd max Topr Tstg Conditions Ratings 17 0.8 17 17 5 10 15 1.0 –30 to +85 –55 to +150 Unit V A V V mA mA V W °C °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 Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN O2599RM(KI) No. 6208-1/7 0.25 Features 7.62 6.4 LB1862 Allowable Operating Ranges at Ta = 25˚C Parameter Power supply voltage ST input High level voltage ST input Low level voltage Hall input common mode input voltage range Symbol VCC STH STL VICM Conditions Ratings 3.8 to 16.8 3 to 14 –0.3 to +0.4 0.2 to VCC–1.5 Unit V V V V Electrical Characteristics at Ta = 25˚C, VCC = 5V Parameter Circuit current Symbol ICC Conditions In drive mode (CT = [L], ST = [L]) In lockup protection mode (CT = [H], ST = [L]) In standby mode (ST = [H]) 1.9 0.32 5.0 2.55 1.6 3.9 Ratings min typ 6.5 2.2 110 2.8 0.46 6.0 2.75 1.8 0.2 4.1 7 0.1 1.0 75 max 9.1 3.1 150 3.7 0.60 7.0 2.95 2.0 0.3 15 0.3 30 1.3 100 Unit mA mA µA µA µA V V V V mV V µA V µA Lockup detection capacitor charge current Capacitor discharge current Capacitor charge/discharge current ratio CT charge voltage CT discharge voltage Output Low level voltage Output High level voltage Hall input sensitivity RD output pin Low voltage RD output pin leakage current HB output Low voltage ST pin input current ICT1 ICT2 RCT VCT1 VCT2 VOL VOH VHN VRD IRDL VHBL IST RCT = ICT1/ICT2 IO = 200 mA IO = 200 mA Zero peak value (Including offset and hysteresis) IRD = 5 mA VRD = 15V IHB = 5 mA VST = 5V Pd max – Ta 1.2 Allowable power dissipation, Pd max – W 1.0 0.8 0.6 0.52 0.4 0.2 0 –30 0 30 60 90 120 Ambient temperature, Ta – °C No. 6208-2/7 LB1862 Truth Table ST H L IN– – H L IN+ – L H CT – L H OUT1 off H L off OUT2 off L H off RD off L off HB off L L Mode Standby Rotating Lockup protection activated Latch-type RD output is Low during rotation and High during stop. Pin Assignment IN– 1 10 RD IN+ 2 9 HB CT 3 LB1862 8 ST OUT1 4 7 VCC GND 5 6 OUT2 Top view A12476 No. 6208-3/7 LB1862 Block Diagram CT 0.47 to 1µF Charge/discharge circuit RD Discharge pulse VCC IN+ HALL IN– Delay circuit OUT2 Hysteresis amplifier HB Delay circuit OUT1 Control circuit M Thermal protection circuit START/STOP ST GND A12478 Sample Application Circuit C2 D1 VCC H IN– RD IN+ OUT1 HB OUT2 ST CT C1=0.47 to 1µF GND A12477 (1) D1 is used to prevent IC destruction caused by reverse-connection. It can be omitted if no problems are expected. (2) C2 would not be required for the internal fan PCB but required for the power supply line in order to reduce the power line inpedance and pass the regenerative current because a motor is basically an inductive load and it has a possibility of large current when the power is first applied or in other cases. (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 or connected to ground. No. 6208-4/7 LB1862 Startup Startup Power-on VCC OUT CT RD A12479 Lockup protection/automatic recovery Locked Output ON Released OUT Output OFF Output OFF RD CT Start/stop ST OUT Output OFF RD A12480 No. 6208-5/7 LB1862 Design reference (1) VCC pin Power supply pin for control block and motor drive. Accepts a wide operation voltage range from 3.8 to 16.8V, for 5V/12V dual power supply support. (2) OUT1, OUT2 pins Single-phase coil output pins. Bipolar drive output with upper side inverted and lower side single output. Built-in regenerative circuit regenerates kickback current between lower side NPN outputs when a diode is used for protection against IC destruction caused by reverse connection. (3) IN–, IN+ pins Hall input signal pins The Hall signal is amplified into a square wave by the Hall amplifier with hysteresis characteristics of ±3.5 mV (typ.). The Hall input signal amplitude should be 70 mV or more. (4) CT pin This pin serves for connecting a capacitor between CT and GND. The capacitor determines the characteristics of the built-in lockup protection circuit for preventing coil burnout in the case of motor restraint. Once normal motor load is restored, the automatic recovery circuit resets itself. Changing the capacitance alters the lockup detection time. When a 0.47 µF capacitor is connected between CT and GND Lockup detection time : approx. 0.5s Lockup protection time/automatic recovery time : approx. 0.16s (output ON) approx. 1s (output OFF) When not using lockup protection function, this pin should be connected to ground. (5) RD pin Open-collector output pin that is Low during rotation and OFF when lockup is detected. The output is a latch type which stays OFF also when the automatic recovery circuit has restored drive mode, unless the rotation actually resumes. (6) ST pin and HB pin ST pin : When input to this pin is High, motor drive is stopped (OUT is high impedance). At this time, RD output indicates lockup protection mode OFF. HB pin : Hall bias switching pin. At ST pin High input, Hall bias is cut off to reduce current drain in fan standby mode. If not used, both pins should be open. (7) Thermal protection circuit When internal temperature Tj of IC reaches 180°C, output current limiter is activated to protect against damage. No. 6208-6/7 LB1862 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, 1999. Specifications and information herein are subject to change without notice. PS No. 6208-7/7