unisonic technologies co., ltd uh276 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2012 unisonic technologies co., ltd qw-r118-013.b complementary outputs hall effect latch ic ? description the utc uh276 is a latch-type hall effect sensor with built-in complementary output drivers. it?s designed with internal temperature compensation circuit and built-in protection diode prevent reverse power fault. the application is aimed for brush-less dc fan the uh276 outputs operate as the hy steresis characteristics. the outputs alternately on and off when either the magnetic flux density larger than threshold b op or the magnetic flux density lower than b rp . ? features * widen power supply range from 3 v ~ 20v. * on-chip hall sensor with excellent hysteresis. * open collector outputs had the sink ing capability up to 400ma. * output clamping diodes reduce the peak output voltages during switching. * build-in reverse protection diode. ? ordering information ordering number package packing lead free halogen free uh276l-g04-k UH276G-G04-K sip-4 bulk ? pin description pin no. pin name p/i/o description 1 v cc p positive power supply 2 do o output pin 3 dob o output pin 4 v ss p ground
uh276 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r118-013.b ? block diagram ? sensor locations
uh276 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r118-013.b ? absolute maximum ratings (t a =25 , unless otherwise specified) parameter symbol ratings unit supply voltage v cc 20 v reverse v cc polarity voltage v rcc -25 v output off voltage v ce 32 v magnetic flux density b unlimited output on current continuous i c 0.4 a hold 0.5 peak (start up) 0.7 power dissipation p d 500 mw junction temperature t j +150 operating temperature t opr -20 ~ +85 storage temperature t stg -65 ~ +150 note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. output zener protection voltage ? electrical characteristics (t a =25 , unless otherwise specified) parameter symbol test conditions min typ max unit low supply voltage v ce v cc =3.5v, i l =100ma 0.6 v supply voltage v cc 3 20 v output saturation voltage v ce ( sat ) v cc =14v, i l =400ma 0.6 0.9 v output leakage current i ce x v ce =14v, v cc =14v <0.1 10 a supply current i cc v cc =20v, output open 15 25 ma output rise time t r v cc =14v, r l =820 ? , c l =20pf 0.3 3 s output falling time t f v cc =14v, r l =820 ? , c l =20pf 0.04 1 s switch time differential t v cc =14v, r l =820 ? , c l =20pf 0.3 3 s ? magnetic characteristics a grade parametr symbol min typ max unit operate point b op 10 50 g release point b rp -50 -10 g hysteresis b hys 20 100 g b grade parametr symbol min typ max unit operate point b op 5 70 g release point b rp -70 -5 g hysteresis b hys 20 140 g c grade parametr symbol min typ max unit operate point b op 100 g release point b rp -100 g hysteresis b hys 20 200 g
uh276 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r118-013.b ? chysteresis characteristics bop 0 brp on dob dob off o u t p u t v o l t a g e i n v o l t s magnetic flux density in gauss bop 0 brp on do do o u t p u t v o l t a g e i n v o l t s magnetic flux density in gauss off b hy b hy ? typical application circuit ? test circuit uh276 14v dob r l1 r l2 c l1 c l2 do 820 20pf 820 20pf
uh276 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r118-013.b ? performance characteristics t a ( ) 25 50 60 70 80 85 90 95 100 105 110 115 120 p d (mw) 550 525 515 505 485 475 465 455 445 425 405 385 365 75 50 0 12 20 b rp supply voltage (v) typical magnetic switch point vs.supply voltage 25 -25 524 b op b hys supply current (ma) utc assumes no respon sibility for equipment failures that result fr om 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 utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior writ ten consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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