ah284 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. 1.0 sep 29, 2005 1/9 ? features - on chip hall sensor - rotor-locked shutdown - automatically restart - built-in zener protection for output driver - operating voltage: 3.8v~20 v - output current: i o(ave) = 500ma for sip-4/sot89-5 - output current: i o(ave) = 400ma for sot23-5 - package: sip-4l, sot23-5l, sot89-5l ? pin assignment 284 12 4 3 1 : vdd 2 : do 3 : dob 4 : gnd front view sip-4l 1 2 3 7 4 5 dob do gnd nc vdd sot89-5l 284 1 3 2 5 4 sot23-5 nc gnd do dob vdd 284 ? general description ah284 is a monolithic fan motor controller with hall sensor?s capability. it contains two complementary open-drain 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. this function repeats while rotor is blocked. until the blocking is removed, the motor recovers running normally. ? pin descriptions name description vdd input power do output pin dob output pin gnd ground nc not connected ? ordering information ah284 x - x x x packing blank : bulk a : tape & reel p: sip-4l package lead l : lead free wafer body blank or a~z : if necessary to specify y: sot89-5l w: sot23-5l (for sot packages only) actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 2/9 ? block diagram (sip4) hall plate control logic regulator lock shutdown and automatic recovery vdd dob do amp. 1 2 3 4 gnd ? typical application circuit (sip4) vdd dob do gnd 12v d2 l2 l1 284 12 3 4 d1 r1 r2 c1 c2 c3 56 notes: r1, r2: typical c1, c2, c3: typical 2.2 f the r, c value need to be fine tuned base on coils design. ? 12v brush-less dc fan actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 3/9 ? absolute maxi mum ratings (ta = 25 c) characteristics symbol rating unit supply voltage vdd 24 v sip4/sot89-5 500 i o(ave) sot23-5 400 output current i o(peak) 700 ma sip4 550 sot23-5 230 power dissipation p d sot89-5 800 mw operating temperature topr -40 ~ 100 c storage temperature tstg -55 ~ 150 c maximum junction temp. tj 150 c sip4 227 sot23-5 543 thermal resistance jc sot89-5 156 c/w ? electrical characteristics ( ta = 2 5 c, vdd =12v, unless otherwise specified) characteristics symbol conditions min. typ. max. unit supply voltage vdd operating 3.8 - 20 v supply current idd operating - 2.0 4.0 ma output leakage current ioff v out =24v - < 0.1 10 a locked protection on tlrp-on 0.4 0.5 0.6 sec locked protection off tlrp-off 2.4 3 3.6 sec i o =300ma - 375 500 output saturation voltage ) sat ( out v i o =500ma - 625 900 mv output on resistance rds(on) i o =300ma - 1.25 1.67 ohm output zener-breakdown voltage vz 35 42 60 v ? magnetic characteristics ( ta = 2 5 c, vdd = 12v, unless otherwise specified) (1mt=10 gauss) characteristics symbol min. typ. max. unit operate point bop 10 30 60 gauss release point brp -60 -30 -10 gauss hysteresis bhy -- 60 -- gauss actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 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 marking side s ( sip4 ) n marking side s ( sot23-5 ) n marking side s ( sot89-5 ) n ? 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) actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 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 ) actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 6/9 ? marking information (1)sip-4l 284 part number year: ( front view ) "2" = 2002 "1" = 2001 xxxxx nth week: 01~52 id code: a ~ z wafer lot id: l & a~z is lead-free products (2)sot23-5l r4:ah284 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 4 284 y m x m : month: a~l y : year: 0-9 id code a~z : non-lead free a~z : lead free actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 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 284 0.46mm +/-0.03mm 0.2mm max. 5 o -7 o o 3 o -5 o 3 o -5 5 o -7 o actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 8/9 (2) sot23-5l l e e he d a2 a1 b(5x) a view c l1 1(4x) 2(4x) e1 gauge plane c see view c x y dimensions in millimeters dimensions in inches symbol min. nom. max. min. nom. max. a 1.05 - 1.35 0.041 - 0.053 a1 0.05 - 0.15 0.002 - 0.006 a2 1.00 1.10 1.20 0.039 0.043 0.047 b 0.25 - 0.50 0.010 - 0.020 c 0.08 - 0.20 0.003 - 0.008 d 2.70 2.90 3.00 0.106 0.114 0.118 e 1.50 1.60 1.70 0.059 0.063 0.067 he 2.60 2.80 3.00 0.102 0.110 0.118 l 0.30 - 0.60 0.012 - 0.024 l1 0.50 0.60 0.70 0.020 0.024 0.028 e 1.80 1.90 2.00 0.071 0.075 0.079 e1 0.85 0.95 1.05 0.033 0.037 0.041 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 - actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
ah284 hall-effect smart fan motor controller anachip corp. www.anachip.com.tw rev 1.0 sep 29, 2005 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 - actual package is sc-59, not sot-23 this anachip version datasheet is replaced with diodes inc. datasheet ah284
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