unisonic technologies co., ltd h1277 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2011 unisonic technologies co., ltd qw-r118-011.b high sensitivity hall effect sensor ic with fg output ? description the utc h1277 is a semiconducting integrated hall effect sensor ic. it is just like all the hall s ensitive hall effect sensors designed to work in the situations which the accurate track is extremely small and the changes in magnetic flux density-changes are generally too small to be operated. besides those features shared in all hall effect sensors, h1277 can apply to various kinds of applications, such as contact-less switches, motion detectors, gear tooth sensors, proximity detectors, and electric communication of dc brushless motors, etc. ? features * hall sensor on-chip * output zener diodes to clamp the peak output voltage * frequency generation output * high output sinking capability (nearly to 400ma) * high sensitivity hall effect sensor ic: 65g ? ordering information ordering number lead free halogen free package packing h1277l-g04-k H1277G-G04-K sip-4 bulk ? pin description pin no. pin name description 1 fg open collector pin: for rotation frequency detection 2 do coil output or power input 3 dob coil output or power input 4 gnd ic ground
h1277 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r118-011.b ? block diagram ? sensor locations
h1277 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r118-011.b absolute maximum ratings (t a =25 ,unless otherwise specified) parameter symbol ratings units supply voltage (do/dob voltage) v cc 25 v fg pin off voltage v off 25 v fg sink current i fg 10 ma output current i out 500 ma power dissipation p d 500 mw junction temperature t j -20 ~ +150 storage temperature t stg -65 ~ +150 note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. ? recommended operating conditions (t a =25 ,unless otherwise specified) parameter symbol ratings units supply voltage (do/dob voltage) v cc 3.7 ~20 v maximum fg pin off voltage v off 20 v maximum output sink current i out 400 ma maximum fg sink current i fg 5 ma junction temperature t j -20 ~ +125 operating temperature t opr -20 ~ +85 ? electrical characteristics (t a = 25 ,v cc =12v, unless otherwise specified) parameter symbol tese conditions min typ max units output saturation voltage v o(sat) i out = 400ma 700 900 mv supply current i cc 11 25 ma fg off leakage current i off 1 a fg on saturation voltage v on i fg = 5ma 0.2 0.4 v clamp output voltage v clamp 33 v output rise time t r 0.4 s output fall time t f 0.1 s propagation delay time t d r l = 200 ? , c l = 10pf 2 s ? magnetic characteristics (t a = 25 ,v cc =12v unless otherwise specified) parameter symbol test conditions min typ max units magnetic operate points bop 10 65 gauss magnetic release points brp -65 -10 gauss
h1277 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r118-011.b ? application circuit v fg v dd utc h1277 -b +b l2 l1 ? test circuit utc h1277 a v a v v on i fg i off v 2 -b +b v 1 i cc v cc measure v cc ,i cc when do is off. measure v on ,i fg when fg is on. measure i off when fg is off.
h1277 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r118-011.b ? typical application circuits (t a = 25 ,v cc =12v unless otherwise noted) supply current, i cc (ma) supply current, i cc (ma) 5 4 3 2 1 0 0 0.05 0.10 0.15 0.75 0.6 0.45 0.3 0.15 0 50 100 150 200 250 300 350 400 fg sink current vs. fg on saturation voltage fg sink current, i fg (ma) fg on saturation voltage,v on (v) output saturation voltage,v o(sat) (v) output current, i out (ma) output current vs. output saturation voltage utc assumes no responsibility for equipment failures that result from 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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