Ordering number : EN0696 Monolithic Digital IC LB8681CL Constant Current Driver IC with H-bridge × 1.5 Channel Overview The LB8681CL is a low-voltage, low-saturation 1.5-channel constant current forward/reverse driver IC provided in a miniature package suitable for use in cell phone cameras. The LB8681CL can be driven directly from a microcontroller and is optimal for control of the voice coil motors used for shutter and aperture control in cell phone cameras. Features • Supports low-voltage drive. (2.2V or more) • Ultraminiature package (ECSP2828-10) Functions • Constant current control (IOUT = 100mA at RF = 2Ω) • Built-in thermal protection circuit • Built-in reference voltage (0.2V typical) • Built-in spark killer diode Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Output voltage Symbol VOUT max Input voltage Ground pin source current Allowable power dissipation Conditions VCC max Ratings Unit -0.3 to +8.0 V V OUT1, OUT2, OUT3 VCC + VSF VIN max IN1, IN2, IN3 -0.3 to +8.0 IGND Per channel 400 mA When mounted on a circuit board * 450 mW Pd max V Operating temperature Topr -30 to +85 °C Storage temperature Tstg -40 to +150 °C * Specified circuit board : 20.0 × 10.0 × 0.8mm3, paper-phenol 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. 31407 TI PC B8-8350 No.0696-1/5 LB8681CL Allowable Operating Ranges at Ta = 25°C Parameter Symbol Supply voltage VCC High-level input voltage VIH Low-level input voltage VIL Conditions Ratings Unit 2.2 to 7.5 IN1,IN2,IN3 V 1.8 to 7.5 V -0.3 to 0.7 V Electrical Characteristics at Ta = 25°C, VCC = 3.3V Parameter Symbol Ratings Conditions min Supply current Output saturation voltage Input current Unit max ICC0 IN1 = IN2 = IN3 = 0V 0.1 1 μA ICC1 IN1, IN2, or IN3 = 3V 13.9 18 mA IN1, IN2, or IN3 = 3V, IOUT = 100mA 0.20 0.32 VOUT1 Output constant current typ V VOUT2 IN1, IN2, or IN3 = 3V, IOUT = 200mA* 0.41 0.62 V IOUT1 Between REF and GND : 2Ω 95 100 105 mA IOUT2 Between REF and GND : 1Ω* 190 200 210 mA 40 60 μA 1 μA 1.7 V IIN VIN = 3V Spark killer diode Reverse current IS(leak) Forward voltage VSF IOUT = 200mA* * Design guarantee: These characteristics are design targets and are not measured. Package Dimensions unit : mm (typ) 3301A SIDE VIEW TOP VIEW BOTTOM VIEW 0.325 10 1 6 5 0.3 1 (0.2) 2.8 0.05 2.8 0.6 2 0.075 (0.015) 0.8 (0.8) SIDE VIEW SANYO : ECSP2828-10 No.0696-2/5 Allowable power dissipation, Pd max – mW LB8681CL Pd max – Ta 500 Specified circuit board : 20.0×10.0×0.8mm3 paper-phenol board 450 400 300 234 200 100 0 – 30 0 30 60 85 90 Ambient temperature, Ta – °C Pin Assignment VCC 1 10 OUT1 IN1 2 9 RSE IN2 3 8 RFG IN3 4 7 OUT2 GND 5 6 OUT3 LB8681CL Top View No.0696-3/5 LB8681CL Block Diagram Shutter OUT1 0.1μF OUT2 Iris OUT3 VCC 0.1μF 0.2V + Reference voltage IN1 Constant current control amplifier IN2 Logic circuit CPU IN3 Thermal protection circuit GND RSE RFG [Constant current formula] IOUT = 0.2 ÷ RF When VCC is high, the 0.01μF capacitor may be inserted between OUT and OUT. Truth Table Input IN1 Low High Output Notes IN2 IN3 OUT1 OUT2 OUT3 Low Low − − − High Low High Low − Low High Low High − High High Low High − Low Low − − − Off High Low − Low High Forward Low High − High Low High High − High Low Standby Forward Shutter Aperture Reverse Reverse Note : "−" indicates the output off state. (high-impedance) No.0696-4/5 LB8681CL 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, 2007. Specifications and information herein are subject to change without notice. PS No.0696-5/5