unisonic technologies co., ltd uh266 linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2015 unisonic technologies co., ltd qw-r118-016.b high voltage hall effect latch ? description the utc uh266 is a one-chip composed of hall sensor and output coil drivers, applied to two-phase brush-less dc motor. the device includes an on-chip ha ll plate for magnetic sensing, a amplifier for hall voltage, and a schmitt trigger to provide switching hysteresis, and complementary darlington open-collector drivers for sinking large current loads. an internal bandgap regulator is used to provide temperature compensated supply voltage and allows a wide operating range. if b>bop, do turn on (low) and dob turn off (high). the outputs state is latched prior to reach release point (brp). if b uh266 linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r118-016.b ? pin description pin no. pin name description 1 v cc positive power supply 2 do output pin 3 dob output pin 4 gnd ground ? block diagram v cc do dob gnd output driver temperature compensation schmitt trigger amplifier hall plate over-temperature protection regulator
uh266 linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r118-016.b ? absolute maximum rating (t a =25c) parameter symbol ratings unit supply voltage v cc 28 v output ?off? voltage v out ( off ) 28 v output ?on? current i o ( con ) 400 (note 2) ma i o ( hold ) 500 ma i o (p eak ) 700 ma magnetic flux density b unlimited gauss power dissipation (note 3) p d 550 mw operating temperature range t opr -20~+85 c storage temperature t stg -65~+150 c notes: 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. i o (con) is 150ma at 85c 3. see performance characteristic for other conditions ? thermal data parameter symbol ratings unit junction to ambient ja 227 c/w ? electrical characteristics (t a =25c) parameter symbol test conditions min typ max unit supply voltage v cc 4 28 v output zener breakdown v z output turn off 54 62 70 v output saturation voltage v ce (sat) v cc =24v, i c =400ma 1.1 1.5 v output leakage current i ce x v cc =24v, v ce =24v < 0.1 10 a supply current i cc v cc =24v, output open 5 10 ma output rise time t r v cc =24v, r l =820 ? , c l =20pf 1.0 5 s output falling time t f 1.0 1.5 s switch time differential ? t 3.0 10 s ? magnetic characteristics (t a =25c) a grade (1mt=10gauss) parameter symbol min typ max unit operate point bop 10 70 gauss release point brp -70 -10 gauss hysteresis bhy 80 gauss b grade (1mt=10gauss) parameter symbol min typ max unit operate point bop 100 gauss release point brp -100 gauss hysteresis bhy 80 gauss
uh266 linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r118-016.b ? chysteresis characteristics output voltage in volts output voltage in volts ? operation characteristics (output voltage)
uh266 linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r118-016.b ? test circuit 24v r l 1 r l 2 c l 1 c l 2 utc uh266 v out 1 (do) v out 2 (dob) 820 820 20pf 20pf ? typical application circuit utc uh266 v cc + - 1 2 3 4 coil1 coil2 brush-less dc fan 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 written 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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