ah266 high voltage hall effect latch this datasheet contains new product information. anachip corp. re serves the rights to modify the product specification without notice. no liability is assumed as a result of the use of this product. no rights under any patent accompany the sale of the product. rev. 0.2 jan 19, 2005 1/6 ? features - on-chip hall plate - operating voltage: 4v~28v - output current: 400ma(continuous , 25 o c) - reverse protection diode only for chip reverse power connecting (note) - output protection zener breakdown vz=62v(typ) - package: sip-4l (note) protection diode only exists at power pin(1,4) output, not including pin (2,3). ? application - dual-coil brush-less dc motor - dual-coil brush-less dc fan - revolution counting - speed measurement ? pin assignment 1. vcc 2. do 4. gnd 3. dob ? general description ah266 is an integrated hall sensor with output drivers designed for electronic commutation of brush-less dc motor applications. the device includes an on-chip hall voltage generator for magnetic sensing, a comparator that amplifies the hall voltage, and a schmitt trigger to provide switching hysteresis for noise rejection, and complementary darlington open-collector drivers for sinking large current loads. an internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. if a magnetic flux density (b) is larger than operate point (bop), do turn on (low) and dob turn off (high). the outputs state is latched prior to reach release point (brp). if b< brp, do turn off and dob turn on. ah266 is rated for operation over temperature range from -20 o c to 85 o c and voltage range from 4v to 28v. the devices are available in low cost die forms or rugged 4 pin sip packages. ? pin configuration name description vcc positive power supply do output pin dob output pin gnd ground ? ordering information ah266 x -x x x -x packing blank : tube a : taping p: sip-4l package lead l : lead free blank: normal wafer body magnetic characteristics blank or a~z : if necessary to specify a or b
ah266 high voltage hall effect latch anachip corp. www.anachip.com.tw rev 0.2 jan 19, 2005 2/6 ? block diagram 1 reg. hall plate amp vcc do dob ? typical application circuit 12 4 3 266 coil1 coil2 vcc brush-less dc fan note: this application circuit can?t protect reverse coil current if power is connecting reverse.
ah266 high voltage hall effect latch anachip corp. www.anachip.com.tw rev 0.2 jan 19, 2005 3/6 ? absolute maximum ratings (at ta = 25 0 c ) parameter symbol rating unit supply voltage vcc 28 v output ?off ? voltage vout (off) 28 v io (con) 400 (note 1) ma io (hold) 500 ma output ?on? current io (peak) 700 ma magnetic flux density b unlimited gauss operating temperature range top -20~+85 c storage temperature range tstg -65~+150 c power dissipation (note 2) pd 550 mw thermal resistance jc 227 c/w note 1: io(con) is 150 ma at 85 c 2: see performance characteristic for other conditions ? electrical characteristics ( ta = 25 c ) characteristic symbol conditions min typ max unit supply voltage vcc 4 28 v output zener breakdown vz output turn off 54 62 70 v output saturation voltage vc e(sat) vcc=24v, ic=400ma 1.1 1.5 v output leakage current icex vce=24v, vcc=24v < 0.1 10 a supply current icc vcc=24v, output open 5 10 ma output rise time tr vcc=24v, rl=820 ? , cl=20pf 1.0 5 s output falling time tf vcc=24v, rl=820 ? , cl=20pf 1.0 1.5 s switch time differential ? t vcc=24v, rl=820 ? , cl=20pf 3.0 10 s ? test circuit 266 cl1 cl2 24v vout1(do) vout2(dob) rl1=rl2=820 ohm cl1=cl2=20 pf rl2 rl1
ah266 high voltage hall effect latch anachip corp. www.anachip.com.tw rev 0.2 jan 19, 2005 4/6 ? magnetic characteristics (ta=+25 o c) (1mt = 10 gauss) a grade characteristic symbol min. typ. max. unit operate point bop 10 - 70 gauss release point brp -70 - -10 gauss hysteresis bhy - 80 - gauss b grade characteristic symbol min. typ. max. unit operate point bop - - 100 gauss release point brp -100 - - gauss hysteresis bhy - 80 - gauss output voltage in volts output voltage in volts 0 0 magnetic flux density in gauss magnetic flux density in gauss do dob bop bop brp brp b hy turn on turn off b hy turn off turn on vsat vsat ? performance characteristics (sip-4l) ta ( c) 25 50 60 70 80 85 90 95 100 pd (mw) 550 440 396 352 308 286 264 242 220 ta ( c) 105 110 115 120 125 130 135 140 150 pd (mw) 198 176 154 132 110 88 66 44 0 power dissipation curve 0 100 200 300 400 500 600 0 15 30 45 60 75 90 105 120 135 150 ta ( c) pd (mw) 85
ah266 high voltage hall effect latch anachip corp. www.anachip.com.tw rev 0.2 jan 19, 2005 5/6 ? operation characteristics marking side s b hy v sat v cc ( output voltage ) v d b rp b op 0 s n ( magnetic flux density ) do high low ( sip4 ) n ? marking information 266 part number year: ( front view ) "2" = 2002 "1" = 2001 x x x x x nth week: 01~52 id code: a ~ z blank: normal l: lead free package
ah266 high voltage hall effect latch anachip corp. www.anachip.com.tw rev 0.2 jan 19, 2005 6/6 ? package information active area depth package sensor location marking side 0.7mm 1.046mm 1234 1.971mm package dimension 14.25mm +/-1.25mm 1.03mm +/-0.1 1.55mm +/-0.1mm 0.38mm +/-0.03mm 5.22mm +/-0.1mm 4.20mm +/-0.1mm 3.65mm +/-0.1mm 1.42mm+/-0.1mm 1.27mm +/-0.03mm 0.41mm +/-0.03mm 0.30mm +/-0.1mm 3.81mm +/-0.03mm 0.46mm +/-0.03mm 0.2mm max. 5 o -7 o o 3 o -5 o 3 o -5 5 o -7 o
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