ah291 low voltage hall-effect smart fan motor controller this datasheet contains new product information. anachip corp. reserves 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. 0.5 jun 18, 2004 1/9 ? features - on chip hall sensor - rotor-locked shutdown - automatically restart - built-in zener protection for output driver - operating voltage: 1.8v~5.75 v - output current: ) ave ( o i = 400 ma - package: sip-4l, sot23-5l, sot89-5l ? general description ah291 is a monolithic fan motor controller with hall sensor?s capability. it contains two complementary open-collector drivers for motor?s coil driving, automatic lock shutdown and restart function relatively. to avoid coil burning, rotor-lock shutdown detection circuit shut down the output driver if the rotor is blocked and then the automatic recovery circuit will try to restart the motor. these protecting actions are repeated and periodic during the blocked period. until the blocking is removed, the motor recovers running normally. ? pin assignment 291 12 4 3 1 : vcc 2 : do 3 : dob 4 : gnd front view sip-4l 1 3 2 5 4 sot23-5 vcc gnd do dob nc 291 1 2 3 7 4 5 dob do gnd nc vcc sot89-5l ah291 ? pin descriptions name description vcc input power do output pin dob output pin gnd ground nc not connected ? ordering information ah291 x -x x x packing blank : tube or bulk a : tape & reel p: sip-4l package lead l : lead free blank: normal wafer body blank or a~z : if necessary to specify y: sot89-5l w: sot23-5l
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 2/9 ? block diagram (sip4) hall plate control logic regulator lock shutdown and automatic recovery vcc dob do amp. 1 2 3 4 gnd ? application circuit vcc dob do gnd 1.8v/5.75v d1 l2 l1 291 c1 =10uf + 12 3 4 1.8v/5.75v brush-less dc fan
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 3/9 ? absolute maxi mum ratings (ta = 25 c) characteristics symbol rating unit output zener-breakdown voltage vz 38 v operating supply voltage v cc 8 v i o(ave) 400 output current i o(peak) 500 ma sip4 550 sot23-5 230 power dissipation p d sot89-5 800 mw operating temperature topr -20 ~ 100 c storage temperature tstg -55 ~ 150 c maximum junction temp. tj 150 c ? electrical characteristics ( ta = 2 5 c, v cc = 5v, unless otherwise specified) characteristics symbol conditions min. typ. max. unit supply voltage vcc operating 1.8 5.75 v supply current cc i operating - 2.6 4.0 ma lock protection on tlrp-on 0.4 sec lock protection off tlrp-off 2.4 sec i o =180ma - 300 output saturation voltage ) sat ( out v i o =350ma - 600 mv output on resistance rds(on) 1.75 ohm ? magnetic characteristics ( ta = 2 5 c, v cc = 5v, unless otherwise specified) (1mt=10 gauss) characteristics symbol min. typ. max. unit operate point bop -- 30 60 gauss release point brp -60 -30 -- gauss hysteresis bhy -- 60 -- gauss
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 4/9 ? operating characteristics dob do 12 10 8 6 4 2 off op rp on output voltage in volts 12 10 8 6 4 2 off rp op on output voltage in volts bop brp 0 bop brp 0 magnetic flux density in gauss magnetic flux density in gauss vsat vsat ? performance characteristics (sip4) 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 255075100125150 ta ( c) pd (mw)
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 5/9 ? performance characteristics (sot23-5) ta ( c) 25 50 60 70 80 90 100 110 120 130 140 150 pd (mw) 230 184 166 147 129 110 92 74 55 37 18 0 power dissipation curve 0 100 200 300 0 25 50 75 100 125 150 ta ( c) pd (mw) ? performance characteristics (sot89-5) ta ( c) 25 50 60 70 75 80 85 90 95 100 pd (mw) 800 640 576 512 480 448 416 384 352 320 ta ( c) 105 110 115 120 125 130 135 140 145 150 pd (mw) 288 256 224 192 160 128 96 64 32 0 power dissipation curve 0 100 200 300 400 500 600 700 800 900 0 25 50 75 100 125 150 ta ( c) pd (mw )
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 6/9 ? marking information (1) sip-4l 291 part number year: ( top view ) "2" = 2002 "1" = 2001 x x x x x nth week: 01~52 id code blank : normal l : lead free package ~ (2)sot23-5l ra:ah291 xx ym x date code y : year m :month(a~l) (top view) id code a~z: non-lead free a~z: lead free (3)sot89-5l 1 2 3 5 7 4 291 y m x m : month: a~l y : year: 0-9 id code a~z: non-lead free a~z : lead free
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 7/9 ? package information (1)sip-4l active area depth package sensor location marking side 0.7mm 1.97mm 1.04mm 1234 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 291 0.46mm +/-0.03mm 0.2mm max. 5 o -7 o o 3 o -5 o 3 o -5 5 o -7 o
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 8/9 (2)sot23-5l gauge plane 0.25 mm l l1 e1 e e1 d 123 4 5 b e b1 b c c1 base metal with plating a2 a1 a seating plane 0.10 c 5x 2(4x) 1(4x) x y dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.05 1.20 1.35 0.041 0.047 0.053 a1 0.05 0.10 0.15 0.002 0.004 0.006 a2 1.00 1.10 1.20 0.039 0.043 0.047 b 0.25 - 0.55 0.010 - 0.022 b1 0.25 0.40 0.45 0.010 0.016 0.018 c 0.08 - 0.20 0.003 - 0.008 c1 0.08 0.11 0.15 0.003 0.004 0.006 d 2.70 2.85 3.00 0.106 0.112 0.118 e 2.60 2.80 3.00 0.102 0.110 0.118 e1 1.50 1.60 1.70 0.059 0.063 0.067 l 0.35 0.45 0.55 0.014 0.018 0.022 l1 0.60 ref. 0.024 ref. e 0.95 bsc. 0.037 bsc. e1 1.90 bsc. 0.075 bsc. 0 o 5 o 10 o 0 o 5 o 10 o 1 3 o 5 o 7 o 3 o 5 o 7 o 2 6 o 8 o 10 o 6 o 8 o 10 o x - 1.067 - - 0.042 - y - 0.432 - - 0.017 -
ah291 low voltage hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 0.5 jun 18, 2004 9/9 (3)sot89-5l k j l d c a i h g e b f f package sensor location x y dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 4.40 4.50 4.60 0.173 0.177 0.181 b 4.05 4.15 4.25 0.159 0.163 0.167 c 1.50 1.60 1.70 0.059 0.063 0.067 d 1.30 1.40 1.50 0.051 0.055 0.059 e 2.40 2.50 2.60 0.094 0.098 0.102 f 0.80 - - 0.031 - - g 3.00 ref. 0.118 ref. h 1.50 ref. 0.059 ref. i 0.40 0.46 0.52 0.016 0.018 0.020 j 1.40 1.50 1.60 0.055 0.059 0.063 k 0.35 0.39 0.43 0.014 0.015 0.017 l 5 o t yp .5 o t yp . x - 1.90 - - 0.075 - y - 1.65 - - 0.065 -
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