42512 sy 20120222-s00005 no.a2028-1/4 semiconductor components industries, llc, 2013 may, 2013 la6581mc overview the la6581mc is a low-saturation btl output linear drivin g motor driver for single-phase bipolar fan motors. it features quite, low power, high efficiency drive that suppresses reactive current. it is optimal for use in applications that require miniaturization and low noise, such as cpu cooling fan motors and 5 to 12v electronic game products. functions ? single-phase full-wave linear drive with btl output (gain resistance 500 to 284k , 55db) : suitable for the equipment requiring silent operation, such as game equipment, cpu cooler, etc. because of its freedom from switching noise. ? low-voltage operation possible, with wide operable voltage range (3 to 16v) ? low saturation output (upper + lower saturation voltage : v o sat (total) = 0.3v typ, i o = 100ma) : high coil efficiency with low current drain. ic itself does not generate much heat. ? high impedance of hall input pin ? fg output (rotation speed detection output : open collector output) ? heat protection circuit : when the large current flows because of output short-circuit, raising the ic chip temperature above 180 c, the heat protection circuit suppresses the drive current, pr eventing ic burn and breakdown. specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc max 18 v i out 1 max 0.40 a out output current i out 2 max t<200ms 0.50 a out output withstand voltage v out max 18 v fg output withstand v fg max 18 v fg output current i fg max 5ma allowable power dissipation pd max mounted on a specified board *1 750 mw operating temperature topr *2 -30 to +100 c storage temperature tstg -55 to +150 c *1: specified board: 114.3mm 76.1mm 1.6mm, glass epoxy board *2: tj = 150c max must not be exceeded. caution 1) absolute maximum ratings represent the va lue which cannot be exceeded for any length of time. caution 2) even when the device is used within the range of absolu te maximum ratings, as a result of continuous usage under hig h temperature, high current, high voltage, or drastic temperature change, the reli ability of the ic may be degraded. please contact us for the furt her details. ordering number : ENA2028 monolithic linear ic fan motor driver btl driver single-phase full-wave http://onsemi.com stresses exceeding maximum ratings may damage the device. maximum ratings are stress ratings only. functional operation above the recommended oper ating conditions is not implied. extended exposure to stresses above the recommended operating conditions may affect device reliabili ty.
la6581mc no.a2028-2/4 recommended operating conditions at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc 2.2 to 16 v common-phase input voltage range of hall input v icm 0.3 to v cc -1.5 v electrical characteristics at ta = 25 c, v cc = 12.0v, unless especially specified. ratings parameter symbol conditions min typ max unit circuit current i cc in - = 5.8v, in + = 6.0v, r l = 14 19 ma out output low voltage v ol i o = 100ma 0.1 0.2 v out output high voltage v oh i o = 100ma 0.1 0.2 v hall bias voltage v hb rh = 360 +91 1.85 1.95 2.05 v hall amplifier gain vg 52 55 58 db hall amplifier input current v inr -10 -2 +10 a fg output low voltage v fg i fg = 3ma 0.2 0.3 v fg output leakage current i fgl v fg = 7v 30 a thermal protection circuit th * design guarantee 150 180 200 c *: these values are design guarantee values, and are not tested. truth table in - in + out1 out2 fg mode h l h l l l h l h off during rotation - - off off - during overheat protection package dimensions unit : mm (typ) 3424 0 30 60 90 120 0 1000 800 600 400 200 pd max -- ta -30 300 750 ambient temperature, ta -- c allowable power dissipation, pd max -- mw spesified board: 114.3 76.1 1.6mm 3 glass epoxy board. sanyo : soic8 4.9 3.9 6.0 12 8 0.835 0.375 0.2 0.42 1.27 0.175 1.75 max
la6581mc no.a2028-3/4 pin assignment 1 in + 2 hb 3 4 out1 8 7 6 5 fg v cc out2 gnd la6581mc top view block diagram 2.0vrg hb out1 out2 fg in + in - gnd v cc h timing chart hall signal output coil current fg pulse
la6581mc no.a2028-4/4 application circuit example gnd v cc fg out1 out2 in + hb *1 di cr *2 r2 *3 in + hb *5 *4 r1 r2 h h la6581mc elements in substrate *1 : when di to prevent brea kdown in case of reverse connect ion is used, it is necessary to insert a capacitor cr to secure the regenerative current route. similarly, cr is necessary to enha nce the reliability when there is no capacitor near the fan power line. *2 : to obtain hall bias from v cc , carry out 1/2 v cc bias as shown in the figure. linear driving is made through voltage control of the coil by amplifying the hall output. when the hall element output is large, the startup performance and efficiency are impr oved. adjustment of the hall elem ent can reduce the noise further. *3 : when the hall bias is taken from the hb pin, constant-voltage bias is made with about 2.0v. therefore, the hall element can provide the output satis factory in temperature characteristics. adjustment of the hall output amplitude is made with r1. (when v cc = 12v, the step *2 above proves ad vantageous for ic heat generation.) *4 : keep this open when not used. *5 : when the wiring from the hall output to ic hall input is long, noise may be carried through the wiring. on semiconductor and the on logo are registered trademarks of semiconductor components industries, llc (scillc). scillc owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. a listing of scillc?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent-marking.pdf. scillc reserves the right to make changes without further notice to any products herein. scillc mak es no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc assume any liability ar ising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequentia l or incidental damages. ?typical? parameters which may be provided in scillc data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including ?typicals? must be validated for each customer application by customer?s techn ical experts. scillc does not convey any license under its patent rights nor the rights of others. scillc products are not designed, intended, or authorize d for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other appli cation in which the failure of the scillc product could create a situation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of persona l injury or death associated with such unintended or unauthorized use, even if such claim alleges that scillc was negligent regarding the design or manufacture o fthe part. scillc is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws a nd is not for resale in any manner.
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