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| Ordering number : ENN6802 Monolithic digital IC LB1938T 1ch, Low-saturation Forward/Reverse Motor Driver Overview The LB1938T is an H-bridge motor driver that supports low-voltage drive and features low-saturation outputs in an ultraminiature slim package. The LB1938T provides forward, reverse, brake, and standby modes controlled by two input signals, and is an optimal DC motor driver for notebook personal computers, digital cameras, cell phones, and other portable equipment. Package Dimensions unit: mm 3245A-MSOP8 [LB1938T] 3.0 8 5 0.5 Functions and Features * Ultraminiature MSOP-8 package (3.0 x 4.9 x 0.93 mm) * The low saturation voltage means that the voltage applied to the motor is higher and IC heat generation is reduced. This allows this IC to be used in environments with higher ambient operating temperatures. Output saturation voltage (high side + low side): VOsat = 0.15 V typical (IO = 100 mA) * The wide usable voltage range and the low standby mode current drain of 0.1 A make this IC optimal for battery operated equipment. * There are no constraints on the relationship between the input signal voltage and the supply voltage. For example, this IC can be use at VCC = 3 V and VIN = 5 V. * Thermal protection circuit limits the drive current and prevents the IC from causing a fire or being destroyed if the IC chip temperature reaches or exceeds 180C due to large currents flowing when the outputs are shorted due to, for example, motor layer shorting or other phenomena. 0.65 (0.53) 1 4 0.25 (0.85) 1.1max 0.125 0.08 3.0 4.9 SANYO: MSOP8 Allowable Power Dissipation, Pd max -- mW 700 Pd max - Ta 600 500 400 Mounted on the specified 114.3 x 76.1 x 1.5 mm3 glass epoxy circuit board 300 208 200 100 0 -30 0 30 60 90 120 ILB01453 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 Company TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN 91003TN (OT) No. 6802-1/5 LB1938T Specifications Absolute Maximum Ratings at Ta = 25C Parameter Supply voltage Allowable Power dissipation Output current Output voltage Input applied voltage Operating temperature Storage temperature Symbol VCC max Pd max IOUT max VOUT max VIH max Topr Tstg mm3: Glass epoxy, wiring density 20%) Mounted on a board * Conditions Ratings 10.5 400 800 VCC + VSF 10 -30 to +85 -55 to +150 Unit V mW mA V V C C Note: * Mounted on the specified board (114.3 x 76.1 x 1.5 Allowable Operating Range at Ta = 25C Parameter Supply voltage Input high-level voltage Input low-level voltage Symbol VCC VIH VIL Conditions Ratings 2.2 to 10 2.0 to 9.5 -0.3 to +0.3 Unit V V V Electrical Characteristics at Ta = 25C, VCC = 3 V Parameter Symbol ICC1 Circuit Current ICC2 ICC3 VOsat1 Output saturation voltage VOsat2 VOsat3 Spark killer diode forward voltage Spark killer diode inverse current Input current Thermal protection operating temperature VSF IRS IIN TSD Standby Forward/reverse drive Brake Upper+lower IO = 100 mA for forward/ reverse rotation Upper+lower IO = 300 mA for forward/ reverse rotation Upper IO = 100 mA for braking IO = 300 mA VOUT = 10 V VIN = 5 V Design target value* Conditions Ratings min typ 0.1 14 20 0.15 0.35 0.1 0.9 0.1 75 180 max 5 19 29 0.2 0.5 0.15 1.7 5 98 Unit A mA mA V V V V A A C Note: * Design target value : Measurement with a single unit not made. Truth Table IN1 L H L H IN2 L L H H OUT1 OFF H L H OUT2 OFF L H H Mode Standby Forward rotation Reverse rotation Brake Pin Assignment VCC IN1 IN2 S-GND 1 2 8 7 P-GND OUT1 OUT2 NC Top view ILB01454 LB1938T 3 4 6 5 MSOP-8 S-GND: GND for the control system P-GND: GND for the power system No. 6802-2/5 LB1938T Sample Application Circuit C1 = 0.1 to 10 F VCC 1 IN1 60 k 2 80 k OUT1 Control block 7 M 6 OUT2 CPU IN2 60 k 3 80 k S-GND 4 8 P-GND ILB01455 Cautions: * VCC and GND lines suffer substantial fluctuation in the current quantity, causing a problem of line oscillation in certain cases. In this case, take following points into account: (1) Use a thick and short wiring to reduce the wiring inductance. (2) Insert a capacitor with satisfactory frequency characteristics near IC. (3) Connect S-GND to the control system GND on the CPU side and P-GND to the power system GND. No. 6802-3/5 LB1938T VO(sat) - IO VCC = 3 V Output saturation voltage, VO(sat) -- V 0.5 0.5 VO(sat) - Ta VCC = 3 V Output saturation voltage, VO(sat) -- V 0.4 0.4 IO = 3 0.3 00 mA 0.3 0.2 0.2 0.1 0.1 IO = 100 m A 0 0 100 200 300 400 500 ILB01459 0 -40 -20 0 20 40 60 80 100 120 140 Output current, IO -- mA 28 Ambient temperature, Ta -- C 28 ILB01458 ICC - Tc ICC - VCC VCC = VIN 24 24 Current drain, ICC -- mA 20 Current drain, ICC -- mA Brake mod 20 e 16 16 12 Forw a 8 rd or Bra k VC e mode C =5 V rever se mo de, V 3V CC = 5 V 3V revers Forward or e mode IN1 IN2 12 8 4 0 -40 4 0 -20 0 20 40 60 80 100 120 140 0 1 2 3 4 5 6 7 8 9 10 Case temperature, Tc -- C 160 ILB01457 2.0 Supply voltage, VCC -- V ILB01460 IIN - VIN VCC = 3 V ICC Standby Mode Temperature Characteristics VCC = 11 V 1.6 Input current, IIN -- A 120 Current drain, ICC -- A 1.2 80 0.8 40 0.4 0.29 Under 0.01 A 0 0 1 2 3 4 5 6 7 8 9 10 0 -40 -20 0 20 40 60 80 100 120 140 Input voltage, VIN -- V 100 ILB01461 Case temperature, Tc -- C ILB01462 IN Pin Input Current Temperature Characteristics VIN = 5 V 80 Input current, IIN -- A 60 40 20 0 -40 -20 0 20 40 60 80 100 120 140 Case temperature, Tc -- C ILB01463 No. 6802-4/5 LB1938T 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 September, 2003. Specifications and information herein are subject to change without notice. PS No. 6802-5/5 |
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