NJU7381 - 1 - dual h bridge driver with comparator general description the NJU7381 is a dual h-bridge driver ic especially developed for low voltage small stepper motor applications. a pair of high efficiency cmos h-bridge drivers, a built-in end-detection comparator and the advanced 2.5mm-square ffp package make it suitable for miniature micro stepping applications. package outline features ? operating voltage 2.0v to 5.5v ? cmos dual h-bridge drivers for stepper motor driving ? motor output current 200ma(continuous), 400ma(peak) ? built-in end-detection comparator ? schmitt trigger logic input ? thermal shutdown circuit ? package outline ffp16 (2.5 2.5 h0.85mm) NJU7381pc1
NJU7381 - 2 - block diagram
NJU7381 - 3 - pin configurations absolute maximum ratings (ta=25 c) parameter ratings symbol (unit) remarks supply voltage +7.0 v dd (v) logic input voltage -0.3~v dd +0.3 v id (v) motor output current (peak) 400 i opeak (ma) comparator output current 10 i copeak (ma) comparator output voltage +7.0 vc(v) operating temperature -40~+85 topr ( c) storage temperature -50~+150 tstg ( c) power dissipation 300 p d (mw) on pcboard recommended operating conditions (ta=25 c, v dd =3.3v) parameter symbol min. typ. max. unit supply voltage range v dd 2.0 - 5.5 v junction temperature tj -20 - 125 dg.c motor output current i o - - 200 ma 1. ina2 9. comp + 2. vdd 10. vdd 3. inb2 11 nc 4. inb1 12. comp out 5. outb2 13. outa1 6. gnd 14. gnd 7. outb1 15. outa2 8. comp - 16. ina1 6 5 321 12 9 8 7 4 11 10 13 14 15 16 234 9 12 13 14 15 16 1 10 11 8 7 6 5 top view top view bott om v iew bott om v iew ffp-1 6 6 5 321 12 9 8 7 4 11 10 13 14 15 16 321 12 9 8 7 4 11 10 13 14 15 16 234 9 12 13 14 15 16 1 10 11 8 7 6 5 234 9 12 13 14 15 16 1 10 11 8 7 6 5 top view top view bott om v iew bott om v iew ffp-1 6 (note) all vdd and gnd pins should be connected the power supply and the ground respectively. otherwise, the electrical characteristic may not satisfy specifications.
NJU7381 - 4 - electrical characteristics (ta=25 c, v dd =3.3v, unless otherwise specified) parameter symbol conditions min. typ. max. unit general operating current 1 i dd1 ina1=ina2=inb1=inb2=0v - 100 500 ua operating current 2 i dd2 ina1=inb1=3v,ina2=inb2=0v - 100 - ua thermal shutdown t tsd - - 180 - dg.c thermal shutdown hysterisis t hys - - 30 - dg.c drivers logic input current i i v ih =3v - - 1 ua logic high input voltage v ih - 2.4 - - v logic low input voltage v il - - - 0.6 v high output voltage v oh io=+100ma - 3.1 - v low output voltage v ol io= -100ma - 0.2 - v comparator input offset voltage v io - -12 - +12 mv input bias current i ib - - 1 - pa common mode input voltage range v icm - 0 - 2.8 v output voltage vsat rl=10k ohm - 0.3 - v output leak current i co leak v co =5.5v - - 1 ua
NJU7381 - 5 - truth table timing chart *ia and ib mean that the current flowing through output a1 and a2, b1 and b2. input output ina1 ina2 inb1 inb2 outa1 outa2 outb1 outb2 remarks l l l l hi z hi z hi z hi z all output is off h l l l h l hi z hi z h l h l h l h l l l h l hi z hi z h l l h h l l h h l l h l l l h hi z hi z l h l h l h l h l l l h hi z hi z l h h l l h h l l h half step sequence h l l l h l hi z hi z h h l l h l hi z hi z h l h l h l h l h l h h h l h l when both input are h, output is held the previous logic. [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights.
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