Ordering number : EN0697 LB8684CL Monolithic Digital IC Digital Camera Motor Driver for Cell Phones Overview The LB8684CL 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 LB8684CL 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 (ECSP2828-12) 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 • ENA input logic (3-port interface) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Output voltage Symbol VOUT max Input voltage VIN max Ground pin source current Allowable power dissipation Conditions VCC max IGND Pd max Ratings Unit -0.3 to +8.0 V OUT1, OUT2, OUT3 VCC + VSF V ENA, CHSEL, IN -0.3 to +8.0 Per channel When mounted on a circuit board * V 400 mA 450 mW 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 B8-8900 No.0697-1/5 LB8684CL 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 ENA, CHSEL, IN V 1.5 to 7.5 V -0.3 to 0.5 V Electrical Characteristics at Ta = 25°C, VCC = 3.3V Parameter Symbol Ratings Conditions min Supply current Output saturation voltage Output constant current Input current ICCO ENA = 0V typ Unit max 0.1 1 μA ICCO1 ENA = 3V, FC = 0V 3.8 5.5 mA ICCO2 ENA = 3V, RF = 2Ω, excluding the output current, IO 5.5 8.0 mA VOUT1 ENA = 3V, IOUT = 100mA 0.2 0.3 V VOUT2 ENA = 3V, IOUT = 200mA* 0.41 0.6 V IOUT1 Between REF and GND : 2Ω 95 100 105 mA IOUT2 Between REF and GND : 1Ω* 190 200 210 mA 50 70 μA 1 μA IIN VIN = 3V Spark killer diode Reverse current IS(leak) Forward voltage VSF1 IOUT = 100mA 1.7 V VSF2 IOUT = 200mA* 1.7 V * Design guarantee: These characteristics are design targets and are not measured. Package Dimensions unit:mm (typ) 3324 SIDE VIEW 2.8 BOTTOM VIEW (0.425) TOP VIEW 2 0.65 2.8 2 0.35 1 1 0.4 0.8 0.015 0.8 (0.8) SIDE VIEW SANYO : ECSP2828-12 No.0697-2/5 LB8684CL ENA 1 12 11 RSE 10 2 RFG 9 LB8684CL IN NC 3 8 4 5 6 OUT2 7 OUT3 500 Allowable power dissipation, Pd max – mW CHSEL OUT1 VCC Pin Assignment 450 Pd max – Ta Specified circuit board : 20.0×10.0×0.8mm3 paper-phenol board 400 300 234 200 100 0 – 30 0 30 60 85 90 GND FC Ambient temperature, Ta – °C Top View Block Diagram Iris Shutter OUT1 OUT2 OUT3 VCC 1μF Reference voltage ENA CPU CHSEL 0.2V + Constant current control amplifier Logic block IN Thermal protection circuit GND FC RSE RFG 0.001μF to 0.1μF [Constant current formula] IOUT = 0.2 ÷ RF RF Example : If IO is 100mA, RF will be 2Ω. Usage Notes : The set current is determined, as described by the above equation, by the resistor RF inserted between the RFG pin and ground. Truth Table Input ENA CHSEL Low × Low High High Output IN OUT1 OUT2 Notes OUT3 × − − − Low High Low − High Low High − Low − Low High High − High Low Standby Forward Shutter Reverse Forward Aperture Reverse Note: "−" indicates the output off state. (high-impedance) No.0697-3/5 LB8684CL Timing Chart ENA Standby Standby Operate CHSEL OUT1/OUT2 drive OUT2/OUT3 drive IN OUT1 OUT2 OUT3 • • • • • The LB8684CL will be in standby mode when ENA is low and in normal operating mode when ENA is high. CHSEL selects OUT1/OUT2 drive when low, and OUT2/OUT3 drive when high. The IN pin is used for forward/reverse switching. The broken line (----) indicates the off state. During either OUT1/OUT2 or OUT2/OUT3 drive, the output high side transistor will be saturated and the low side transistor will not be saturated. Note that the output current is a constant current. No.0697-4/5 LB8684CL 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.0697-5/5