orderin g numbe r : ena0610a monolithic linear ic f or digital cameras constant current forward/reverse driver lb1941gp overview the lb1941gp is a single-channel forward/reverse driver ic that provides a constant cu rrent control function. its low-saturation output makes it appropriate for voice coil motor control, and it is optimal for use as the shutter driver ic in digital cameras. functions ? high-performance dual operational amplifier ? constant current control (i o = 400 ma when rf = 0.5 ) ? built-in thermal protection circuit ? includes a rapid charge/rapid discharge circuit for stable shutter operation. ? built-in reference voltage circuit (0.2 v typical) ? ultraminiature package (vct16 (2.6mm 2.6mm) specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max -0.3 to +10.5 v output current i o max 600 ma output applied voltage v o max -0.3 to v cc +0.3 v input applied voltage v in max in1, in2 -0.3 to +10.5 v allowable power dissipation pd max mounted on a specified board.* 0.7 w operating temperature topr -20 to +75 c storage temperature tstg -55 to +150 c note*: mounted on a board: 50 40 10.8 mm3: glass epoxy four-layer. allowable operating range at ta = 25c parameter symbol conditions ratings unit function-guaranteed voltage range vopr 2.5 to 10 v constant-current set range i out set with rfg-gnd resistance 50 to 500 ma input low level voltage v il in1, in2 -0.3 to +0.5 v input high level voltage v ih in1, in2 2.0 to 10 v any and all sanyo semiconductor products described or contained herein do not have specifications that can handle applications t hat require extremely high levels of re liability, such as life-support systems, aircraft?s control systems, or other applications w hose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo semiconductor representative nearest you before using any sanyo semiconductor products described or contained herein in such applications. sanyo semiconductor 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 products described or contained herein. 33110 sy / 12407 ms pc 20060518-s00006 no.a0610-1/4
lb1941gp electrical characteristics at ta = 25 c ratings parameter symbol conditions min typ max unit standby current dissipation i stb v cc = 10v 1.0 mv constant-current h bridge drive circuit v out 11 v cc = 3v, i o = 200ma (lower side) 0.08 0.15 a v out 12 v cc = 3v, i o = 200ma (upper side) 0.12 0.23 v output saturation voltage 1 v out 1 v cc = 3v, i o = 200ma (upper + lower side) 0.20 0.35 v v out 21 v cc = 4v, i o = 500ma (lower side) 0.25 0.38 v v out 22 v cc = 4v, i o = 500ma (upper side) 0.35 0.52 v output saturation voltage 2 * v out 2 v cc = 4v, i o = 500ma (upper + lower side) 0.60 0.90 v output constant current 1 i out 1 v cc = 4v, r l = 3 , rf = 1 190 200 210 ma output constant current 2 * i out 2 v cc = 4v, r l = 3 , rf = 0.5 375 400 424 ma temperature dependence of output constant current (reference ta = 25c) i o v cc = 4v, r l = 3 , rf = 0.5 * (ta = ?10 to +60c) -2 +2 % operating current dissipation i cc v cc = 4v, r l = 0 , (no load, full drive) 14 21 ma thermal protection operating temperature tsd * 150 180 210 c control input circuit i ih 1 v ih = 5.5v, v cc = 5.5v 80 100 a i ih 2 v ih = 10v, v cc = 10v 145 200 a control pin maximum input current i il v il = gnd -1 0 a note*: design guarantee: characteristics shown here are design targets and measurement with independent unit is not made before shipment. package dimensions unit : mm (typ) 3318 020 --20 40 60 100 80 0 0.6 0.2 0.8 0.4 1.0 pd max -- ta msg01470 0.7 0.42 ambient temperature, ta -- c allowable power dissipation, pd max -- w specified board specified board: 50 400,8mm 3 fou-layer (2s2p), glass epoxy 2.6 2.6 0.4 0.8 0.25 (0.035) side view side view bottom view top view laser marked index 0.5 (0.55) (c0.116) (0.13) (0.125) 1 2 16 sanyo : vct16(2.6x2.6) no.a0195-2/4
lb1941gp pin assignment 1 2 3 4 5 6 7 8 12 11 10 9 16 15 14 13 (nc) v cc (nc) (nc) (nc) in1 in2 fc (nc) gnd rfs rfg (nc) (nc) out1 out2 lb1941gp top view block diagram v cc out1 out2 0.2v in2 gnd fc rfg rl rf 0.01f in1 ilb01540 + -- c p u reference voltage thermal protection circuit boost charge circuit boost discharge circuit constant current control amplifier logic circuit rfs no.a0195-3/4
lb1941gp truth table input output in1 in2 out1 out2 mode l l off off standby 1* h l h l forward rotation l h l h reverse rotation h h off off standby 2* cautions for use standby states 1 and 2 in the abov e truth table differ as follows: standby state 1 ............all circuits in ic are not operating and the current dissipation is almost zero. standby state 2 ............the constant-curre nt control amplifier output in ic is in the full drive condition. both out1 and out2 are off. the current dissipation is a few ma. during mode transfer from th e standby state 1 to forward (reverse) rotation, the current rises from the output current zero condition to the required constant current value. on the other hand, during mode transfer from the standby state 2 to forward (reverse) rotation, full driv e is applied once to the output, then the current lowers to the required current value. therefore, select the standby 1 state wh en putting ic in the standby state. a typical drive sequence is shown in the figure below. standby standby reverserotation reverserotation fowardrotation in1 in2 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 0.01 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 semiconductor products described or contained herein stipulate the performance, characteristics, and functions of the described pr oducts in the independent state, and are not guarantees of the performance, characteri stics, and functions of the described products as mounted in the customer's products or equipmen t. 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 semiconductor co., ltd. strives to supply hi gh-quality high-reliability products. however, any and all semiconductor products fail with some probabilit y. 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 proper ty. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measur es include but are not limited to protective circuits and error prevention circuits fo r safe design, redundant desi gn, and structural design. ? in the event that any or all sanyo semiconductor products (including technical data, services) described or contained herein are controlled under any of applicab le local export control laws and regulations, such products must not be exported without obtaining t he export license from the authorities concerned in accordance with the above law. ? no part of this publication may be reproduced or tr ansmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, of otherwise, without the prior written pe rmission 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 "d elivery specification" for the sanyo semiconductor prod uct that you intend to use. ? information (including circuit diag rams and circuit parameters) herein is for example only; it is not guaranteed for volume production. sanyo semiconductor believes information herein is accurate and reliable, but no guarantees are made or imp lied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of march, 2010. specifications and information herein are subject to change without notice. ps no.a0195-4/4
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