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Ordering number : ENN7100
Monolithic Digital IC
LB1931T
Constant Current Solenoid Driver IC for Digital Cameras
Overview
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.
Package Dimensions
unit: mm 3245A-MSOP8
[LB1931T]
3.0
Functions and Features
* Constant current control (IO = 400 mA when Rf = 0.5 ) * 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)
8
5
0.5
0.65 (0.53)
1
4
0.25 (0.85) 1.1max 0.125
0.08
3.0 4.9
SANYO: MSOP8 (150 mil)
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Output current Output applied voltage Input applied voltage Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IO max VO max VIN Pd max Topr Tstg IN1 Mounted on a specified board.* Conditions Ratings -0.3 to +10.5 600 -0.3 to VCC + 0.3 -0.3 to +10.5 400 -20 to +75 -55 to +150 Unit V mA V V mW C C
Note*: Mounted on a board (114.3 x76.1 x1.6 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 = 25C
Parameter Function-guaranteed voltage range Constant-current set range Input low level voltage Input high level voltage Symbol VOPR IOUT VIL VIH Set with RFG-GND resistance IN1 IN1 Conditions Ratings 2.5 to 10 50 to 500 -0.3 to +0.5 2.0 to 10 Unit V mA V V
Electrical Characteristics at Ta = 25C, VCC = 4 V
Parameter Standby Current dissipation [Constant-current H bridge drive circuit] Output saturation voltage HLD terminal voltage Output constant current Temperature dependence of output constant current (reference Ta = 25C) Operating current dissipation Thermal protection operating temperature [Control input circuit] Control pin maximum input current IIH IIL VIH = 5.5 V, VCC = 5.5 V VIL = GND -- -1 80 -- 100 0 A VOsat VHLD VOUT1 VOUT2 IO ICC TTSD HLD = OPEN, RL = 3 , RF = 0.5 HLD = GND, RL = 3 , RF = 0.5 VCC = 4 V, RL = 3 , RF = 0.5 * (Ta = -10 to +60C) VCC = 4 V, RL = 0 (No load, full drive) Design target values* IO = 400 mA -- 197 375 180 -2 -- 150 0.30 208 400 195 -- 14 180 0.42 218 425 210 +2 21 210 V mV mA % mA C Symbol ISTB VCC = 8.5 V Conditions Ratings min -- typ -- max 1.0 Unit A
Note*: These items are design target values and are not tested.
600
Pd max -- Ta
Mounted on a board: 114.3 x 76.1 x 1.6mm3 glass epoxy resin
Allowable power dissipation, Pd max -- mW
500
Specified board
400
300
200
192
100
0 --20
0
20
40
60
80
90 100
120
Ambient temperature, Ta -- C
ILB01470
No. 7100-2/4
LB1931T Truth Table
Input IN1 L H Note*: don't care. HLD * open L Output OUT OFF H H Mode Standby Output ON Hold Output ON
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 [] Hold Output ON .... IOUT [A] = 0.1 [V] / RF [] 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) 27.9k Constant current control amplifier + --
0.2V or 0.1V
HLD
4.2k
4.9k
P U IN1
Logic circuit
C
Boost charge circuit Boost discharge circuit
GND Thermal protection circuit 0.033F FC 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 F 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

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