40412 sy 20120321-s00010 no.a2041-1/5 http://onsemi.com LB1938FA overview the LB1938FA is an h-bridge motor driver that supports low-voltage drive and features low-saturation outputs in an ultraminiature slim package. the LB1938FA provides forward, reverse, brake, and standby modes controlled by two input signals, and is an optimal dc motor driver for no tebook personal computers, digital cameras, cell phones, and other portable equipment. features ? ultraminiature micro8 package ? the low saturation voltage means that the voltage applied to the motor is higher and ic heat generation is reduced. this allows this ic to be used in environmen ts with higher ambient operating temperatures. output saturation voltage (high side + low side): v o sat = 0.15v typical (i o = 100ma) ? the wide usable voltage range and the low standby mode current drain of 0.1 a make this ic optimal for battery operated equipment. ? there are no constraints on the relationship between the input signal voltage and the supply voltage. for example, this ic can be use at v cc = 3v and v in = 5v. ? thermal protection circuit limits the drive current and prevents the ic from causing a fire or being destroyed if the ic chip temperature reaches or exceeds 180c due to large currents flowing when the outputs are shorted due to, for example, motor layer shorting or other phenomena. specifications absolute maximum ratings at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc max 10.5 v output current i out max 800 ma output voltage v out max v cc +v sf v input applied voltage v i h max 10 v allowable power dissipation pd max mounted on a specified board * 400 mw operating temperature range topr -30 to +85 c storage temperature range tstg -55 to +150 c note *: mounted on a specified board: 114.3mm 76.1mm 1.5mm, glass epoxy resin, wiring density 20% 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 : ena2041 monolithic digital ic 1ch, low-saturation forward/reverse motor driver 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. semiconductor components industries, llc, 2013 may, 2013
LB1938FA no.a2041-2/5 allowable operating range at ta = 25 c parameter symbol conditions ratings unit supply voltage v cc 2.2 to 10 v input high-level voltage v i h 2.0 to 9.5 v input low-level voltage v i l -0.3 to +0.3 v electrical characteristics at ta = 25 c, v cc = 3v ratings parameter symbol conditions min typ max unit i cc 1 standby 0.1 5 a i cc 2 forward/reverse drive 14 19 ma circuit current i cc 3 brake 20 29 ma v o sat1 upper+lower i o = 100ma for forward/reverse rotation 0.15 0.2 v v o sat2 upper+lower i o = 300ma for forward/reverse rotation 0.35 0.5 v output saturation voltage v o sat3 upper i o = 100ma for braking 0.1 0.15 v spark killer diode forward voltage v sf i o = 300ma 0.9 1.7 v spark killer diode inverse current i rs v out = 10v 0.1 5 a input current i in v in = 5v 75 98 a thermal protection operating temperature tsd design target value * 180 c note *: design target value: meas urement with a single unit not made. package dimensions unit : mm (typ) 3427 pd max - ta allowable power dissipation, pd max - mw ambient temperature, ta - c mounted on a specified board 114.3mm 76.1mm 1.5 mm, glass epoxy resin 0 700 600 500 400 300 100 200 120 0 -30 60 30 90 208 sanyo : micro8 3.0 0.33 0.18 0.65 4.9 0.08 3.0 0.55 1 8 2 1.1 max
LB1938FA no.a2041-3/5 pin assignment s-gnd: gnd for the control system p-gnd: gnd for the power system truth table in1 in2 out1 out2 mode l l off off standby h l h l forward rotation l h l h reverse rotation h h h h brake sample application circuit cautions: ? v cc and gnd lines suffer substantial fluc tuation in the current quantity, causing a problem of line oscillation in certain cases. in this case, take following points into account: (1) use a thick and short wiring to reduce the wiring inductance. (2) insert a capacitor with satisfact ory frequency characteristics near ic. (3) connect s-gnd to the control system gnd on the cpu side and p-gnd to the power system gnd. v cc 1 2 3 4 8 7 6 5 in1 in2 s-gnd p-gnd out1 out2 nc top view LB1938FA v cc out1 in1 out2 in2 p-gnd s-gnd m cpu control block 6 7 1 2 3 4 8
LB1938FA no.a2041-4/5 0.1 0.5 0.3 0.4 0.2 500 200 0 300 100 400 v o (sat) - i o output saturation voltage, v o (sat) - v output current, i o - ma 0 v cc = 3v v o (sat) - ta output saturation voltage, v o (sat) - v ambient temperature, ta - c 0 0.1 0.5 0.3 0.4 0.2 140 20 40 -40 -20 60 80 100 0 120 140 20 40 -40 -20 60 80 100 0 120 i o = 300ma i o = 100ma v cc = 3v i cc - tc current drain, i cc - ma case temperature, tc - c 8 4 0 28 20 24 12 16 brake mode v cc = 5v 3v forward or reverse mode, v cc = 5v 3v 10 4 3 06 58 7 2 19 i cc - v cc current drain, i cc - ma supply voltage, v cc - v 0 28 12 16 20 24 8 4 brake mode v cc = v in in1 in2 forward or reverse mode 10 4 3 06 58 7 2 19 i in - v in input voltage, v in - v 0 160 120 80 40 v cc = 3v 140 40 20 -40 60 100 80 0 -20 120 i cc standby mode temperature characteristics case temperature, tc - c 140 40 20 -40 60 100 80 0 -20 120 case temperature, tc - c 0 2.0 1.6 1.2 0.8 0.4 v cc = 11v 0.29 in pin input current temperature characteristics 0 100 80 60 40 20 v in = 5v
LB1938FA no.a2041-5/5 ps 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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