LB8684CL

Ordering number : EN0697 LB8684CL Overview Monolithic Digital IC Digital Camera Motor Driver for Cell Phones 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 Input voltage Ground pin source current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VOUT max VIN max IGND Pd max Topr Tstg OUT1, OUT2, OUT3 ENA, CHSEL, IN Per channel When mounted on a circuit board * Conditions Ratings -0.3 to +8.0 VCC + VSF -0.3 to +8.0 400 450 -30 to +85 -40 to +150 Unit V V V mA mW °C °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 Supply voltage High-level input voltage Low-level input voltage Symbol VCC VIH VIL ENA, CHSEL, IN Conditions Ratings 2.2 to 7.5 1.5 to 7.5 -0.3 to 0.5 Unit V V V Electrical Characteristics at Ta = 25°C, VCC = 3.3V Parameter Supply current Symbol ICCO ICCO1 ICCO2 Output saturation voltage VOUT1 VOUT2 Output constant current IOUT1 IOUT2 Input current Spark killer diode Reverse current Forward voltage IS(leak) VSF1 VSF2 IOUT = 100mA IOUT = 200mA* 1 1.7 1.7 μA V V IIN ENA = 0V ENA = 3V, FC = 0V ENA = 3V, RF = 2Ω, excluding the output current, IO ENA = 3V, IOUT = 100mA ENA = 3V, IOUT = 200mA* Between REF and GND : 2Ω Between REF and GND : 1Ω* VIN = 3V 95 190 Conditions min Ratings typ 0.1 3.8 5.5 0.2 0.41 100 200 50 max 1 5.5 8.0 0.3 0.6 105 210 70 μA mA mA V V mA mA μA Unit * Design guarantee: These characteristics are design targets and are not measured. Package Dimensions unit:mm (typ) 3324 TOP VIEW 2.8 SIDE VIEW 0.4 BOTTOM VIEW (0.425) 2 0.8 SIDE VIEW (0.8) 0.8 1 1 2.8 0.35 2 0.015 SANYO : ECSP2828-12 0.65 No.0697-2/5 LB8684CL Pin Assignment OUT1 VCC 500 450 400 Pd Pd max – Ta Specified circuit board : 20.0×10.0×0.8mm3 paper-phenol board CHSEL 1 12 11 10 RSE Allowable power dissipation, Pd max – mW ENA 2 9 RFG 300 LB8684CL IN 3 8 OUT2 234 200 100 NC 4 5 6 7 OUT3 0 – 30 0 30 60 85 90 Ambient temperature, Ta – °C FC GND Top View Block Diagram Shutter OUT1 VCC 1μF ENA Reference voltage Iris OUT2 OUT3 0.2V + Constant current control amplifier CPU CHSEL Logic block IN Thermal protection circuit GND FC 0.001μF to 0.1μF RSE RFG RF [Constant current formula] IOUT = 0.2 ÷ 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 Low CHSEL × Low High High IN × Low High Low High OUT1 − High Low − − Output OUT2 − Low High Low High OUT3 − − − High Low Aperture Shutter Notes Standby Forward Reverse Forward 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