Ordering number : ENN7100 Monolithic Digital IC LB1931T Constant Current Solenoid Driver IC for Digital Cameras Overview Package Dimensions The LB1931T is a driver IC for solenoid coils that provide a constant current control function. The LB1931T features low-saturation output and a hold function, and is optimal for control of plunger shutters in digital cameras. unit: mm 3245A-MSOP8 [LB1931T] 3.0 Functions and Features 8 5 1 4 3.0 4.9 0.5 • Constant current control (IO = 400 mA when Rf = 0.5 Ω) • Ultraminiature package (MSOP8: 150 mil) • Built-in thermal protection circuit • Hold function • Includes a rapid charge/rapid discharge circuit for stable shutter operation. • Built-in reference voltage circuit (0.2 V typical) 0.125 0.25 0.08 (0.85) 1.1max 0.65 (0.53) SANYO: MSOP8 (150 mil) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol Output current IO max Output applied voltage VO max Input applied voltage VIN Allowable power dissipation Conditions VCC max Pd max Ratings –0.3 to +10.5 600 –0.3 to VCC + 0.3 IN1 –0.3 to +10.5 Mounted on a specified board.* 400 Unit V mA V V mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –55 to +150 °C Note*: Mounted on a board (114.3 ×76.1 ×1.6 mm3: glass epoxy resin). 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 N2502AS (OT) No. 7100-1/4 LB1931T Allowable Operating Range at Ta = 25°C Parameter Symbol Function-guaranteed voltage range Conditions Ratings VOPR Constant-current set range IOUT Set with RFG-GND resistance Unit 2.5 to 10 V 50 to 500 mA Input low level voltage VIL IN1 –0.3 to +0.5 V Input high level voltage VIH IN1 2.0 to 10 V Electrical Characteristics at Ta = 25°C, VCC = 4 V Parameter Symbol Standby Current dissipation Ratings Conditions ISTB VCC = 8.5 V Output saturation voltage VOsat IO = 400 mA HLD terminal voltage VHLD min typ Unit max — — 1.0 µA [Constant-current H bridge drive circuit] Output constant current 0.30 0.42 V 208 218 mV VOUT1 HLD = OPEN, RL = 3 Ω, RF = 0.5 Ω 375 400 425 VOUT2 HLD = GND, RL = 3 Ω, RF = 0.5 Ω 180 195 210 ∆IO VCC = 4 V, RL = 3 Ω, RF = 0.5 Ω* (Ta = –10 to +60°C) –2 — +2 % ICC VCC = 4 V, RL = 0 Ω (No load, full drive) Temperature dependence of output constant current (reference Ta = 25°C) Operating current dissipation Thermal protection operating temperature — 197 TTSD Design target values* mA — 14 21 mA 150 180 210 °C [Control input circuit] Control pin maximum input current IIH VIH = 5.5 V, VCC = 5.5 V — 80 100 IIL VIL = GND –1 — 0 µA Note*: These items are design target values and are not tested. Pd max — Ta Allowable power dissipation, Pd max — mW 600 Mounted on a board: 114.3 × 76.1 × 1.6mm3 glass epoxy resin 500 Specified board 400 300 200 192 100 0 --20 0 20 40 60 80 90 100 Ambient temperature, Ta — °C 120 ILB01470 No. 7100-2/4 LB1931T Truth Table Input IN1 L H Output HLD OUT Mode * OFF Standby open H Output ON L H Hold Output ON Note*: don't care. Difference between [Output ON] and [Hold Output ON] In the [Hold Output ON] mode, the output current value is 1/2 of the [Output ON] mode. Theoretical equation of the output current value in each mode is shown below: Output ON ............ IOUT [A] = 0.2 [V] / RF [Ω] Hold Output ON .... IOUT [A] = 0.1 [V] / RF [Ω] Pin Assignment IN1 1 8 VCC HLD 2 7 OUT LB1931T FC 3 6 (NC) GND 4 5 RFG Top view ILB01485 No. 7100-3/4 LB1931T Block Diagram RL OUT VCC Reference voltage (=1.36 V) P IN1 Logic circuit C U 27.9kΩ 4.2kΩ -- 4.9kΩ HLD Constant current control amplifier + 0.2V or 0.1V Boost charge circuit Boost discharge circuit GND FC 0.033µF Thermal protection circuit RFG RF ILB01471 [Boost charge and discharge circuits] In order to keep the output response time constant during mode transfer from the standby state to forward (reverse) rotation, this IC incorporates boost charge and discharge circuits for external capacitor connected to the FC pin. The external capacitor connected to the FC pin is for output phase compensation (to suppress oscillation), for which 0.022 to 0.1 µF is recommended. Note that increase in the capacitor value results in increase in the time necessary for the constant current control to rise. 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 November, 2002. Specifications and information herein are subject to change without notice. PS No. 7100-4/4