20812 sy 20120124-s00009//52506 mh im b8-7845 no.a0300-1/6 http://onsemi.com semiconductor components industries, llc, 2013 may, 2013 lb11988hr overview lb11988hr is a motor driver ic optimal for driving the dc fan motors. functions ? three-phase full-wave current linear drive ? built-in current limiter circuit ? built-in saturation prevention circuits in both the upper and lower sides of the output stage ? forward/backward rotation direction setting circuit built in ? fg amplifier ? thermal shutdown circuit specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit v cc max 24 v maximum supply voltage v s max 24 v maximum output current i o max 1.3 a allowable power dissipation pd max independent ic 0.8 w operating temperature topr -40 to +85 c storage temperature tstg -55 to +150 c 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 abso lute maximum ratings, as a result of continuous usage under hig h temperature, high current, high voltage, or drastic temperature change, the reliability of th e ic may be degraded. please contact us for the further detai ls. allowable operating ratings at ta = 25 c parameter symbol conditions ratings unit v s 5 to 22 v supply voltage v cc 5 to 22 v hall input amplitude v hall between hall inputs 30 to 80 mvo-p monolithic digital ic fan motor driver orderin g numbe r : ENA0300a 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.
lb11988hr no.a0300-2/6 electrical characteristics at ta = 25 c, v cc = 12v, v s = 12v ratings parameter symbol conditions min typ max unit v cc current drain i cc r l = 560 (y) 15 24 ma output v o sat1 i o = 500ma, rf = 0.5 , sink + source (saturation prevention function included) 2.1 2.6 v output saturation voltage v o sat2 i o = 1.0a, rf = 0.5 , sink + source (saturation prevention function included) 2.6 3.5 v output leakage current i o leak 1.0 ma hall amplifier input offset voltage v off (hall) -6 +6 mv input bias current v b (hall) v in , w in 1 3 a v cm 1(hall) v cc =v s =12v 3 v cc -3 v common-mode input voltage v cm 2(hall) v cc =v s =5v 1.5 v cc -1.5 v fr threshold voltage v frth 4 8 v input bias current ib (fr) -5 a current limiter lim pin current limit level i lim rf = 0.5 , with the hall input logic states fixed (u, v, w = high, high, low) 1 a saturation saturation prevention circuit lower side voltage setting v o sat (det) rl = 560 (y), rf = 0.5 , the voltage between each output and the corresponding rf. 0.28 v fg amplifier upper side output saturation voltage vsatu (sh) 11.8 v lower side output saturation voltage vsatd (sh) 0.3 v hysteresis vhys 23 mv tsd operating temperature t-tsd design target value* 170 c note * : items shown to be design target val ues in the conditions column are not measured. package dimensions unit : mm (typ) 3233b 15.2 (6.2) 0.3 7.9 (4.9) 10.5 2.7 0.8 2.0 (0.8) 1 14 15 28 0.65 0.25 2.45max 0.1 (2.25) heat spreader sanyo : hsop28h(375mil)
lb11988hr no.a0300-3/6 pin assignment truth table and control functions hall input source sink u v w fr v w h 1 w v h h l l u w h 2 w u h l l l u v h 3 v u h l h l w v h 4 v w l l h l w u h 5 u w l h h l v u h 6 u v l h l l note : the ?h? state for fr is defined as a voltage of 8v or higher, and the ?l? state for fr is defined as a voltage of 4v or lower. (when v cc = 12v.) note : for the hall inputs, the input high state is defined to be the state where the (+) input is higher than the corresponding (-) input by 0.01v or higher, and the input low state is defined to be the state where the (+) input is lower than the corresponding (-) input by 0.01v or higher. note : since this drive technique is a 180 current application scheme, the phases other than the sink and t he source phases will not turn off. -40 -20 20 40 60 80 100 0 0.2 0.6 0.4 0.8 1.0 pd max - ta 0.42 0.8 0 ambient temperature, ta - c allowable power dissipation, pd max - w independent ic v out w out 1 18 u out nc 2 17 nc fgout 3 16 rf fr 4 15 vs gnd 5 14 v cc fc 6 13 w in - u in + 7 12 w in + u in - 8 11 v in - v in + 9 10 lb11988hr top view 21 20 19 25 24 23 22 28 27 26 nc nc nc nc nc nc nc nc nc nc
lb11988hr no.a0300-4/6 block diagram + - + - + - + - hall input synthesis block (linear matrix) synthesized output logarithmic compression block logarithmic conversion and differential distribution differential distribution current limiter feedback amplifier fg amplifier u out rf fc vs v out w out u in + u in - u in + u in - v cc v cc v cc fgout gnd reference voltage tsd bandgap 1.2v limref + - + - + - + + + - v in + v in - + - w in + w in - schmitt amplifier drive distribution circuit and lower side saturation prevention control upper side saturation prevention control forward/reverse switing fr v cc
lb11988hr no.a0300-5/6 equivalent circuit pin name equivalent circuit u in + u in - v in + v in - w in + w in - 200 200 100 a input + input - u out v out w out rf v s 200 30k 150 a v cc rf output lower side oversaturation prevention circuit input block v s fr v cc fr 200 1/2 v cc 200 a fc 10k v cc fc fgout v cc v cc fgout
lb11988hr ps no.a0300-6/6 pin functions pin no. pin name function 7 frame gnd ground for circuits other than the output transistors. note that the rf pin will be at the lowest potential of the output transistors. 4 fgout this is the fg amplifier output pin. internally, it is a resistive load. (pull up) 6 fr forward/reverse switching pin 9 fc corrects the frequency characteristics of the saturati on prevention circuit loop and current limiter circuit. 12, 13 14, 17 18, 19 u in + , u in - v in + , v in - w in + , w in - u-phase hall input. logic high refers to the state where in + > in - . v-phase hall input. logic high refers to the state where in + > in - . w-phase hall input. logic high refers to the state where in + > in - . 21 v cc power supply provided to all ic internal circuits other than the output block. this voltage must be stabilized so that ripple and noise do not enter the ic. 22 v s output block power supply 23 rf used for output current detection. th e current limiter circuit operates using the resistor (rf) connected between this pin and ground. note that the lower side saturation prevention circuit oper ates according to the voltage that appears on this pin. since the over-saturation level is set by this voltage, the level of the lower side saturation prevention circuit may be degraded in the large current region if the value of rf is made extremely small. 27 28 1 u out v out w out u-phase hall output. v-phase hall output. (these pins include internal spark killer diodes.) w-phase hall output. 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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