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| wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. hall effect sensor ic with complementary output drivers and frequency generator features: operate from 2.8v to 20v supply voltage. on-chip hall sensor. internal bandgap regulator allows temperature compensated operations and a wide operating voltage range. high output sinking capability up to 400ma for driving large load. lower current change rate reduces the peak output voltages during switching. available in rugged low profile sot-25 , sip-4l,sip-5l packages. built-in fg output. built-in protection diode for reverse power supply fault. general description: wsh41fc is designed to integrate hall sensor with complementary output drivers and frequency generator together on the same chip, it is suitable for speed measurement, revolution counting, positioning, and dc brushless motors. it includes a temperature compensated voltage regulator, a differential amplifier, a hysteresis controller, two open-collector output drivers capable of sinking 400ma current load and an open-collector frequency generator capable of sinking 10ma current load. an on-chip protection diode is implemented to prevent reverse power fault. the temperature-dependent bias increases the supply voltage of the hall plates and adjusts the switching points to the decreasing induction of magnets at higher temperatures. subsequently, the open collector output switches to the appropriate state. wsh41fc are rated for operation over temperature range from C 20 ? c to125 ? c and voltage ranges from 2.8v to 20v. in sot-25 package, the built-in fg function can save fan system a lot of cost. it is a very economical solution when fan system need fg signal. ? winson, 2003 jan
wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. name p/i/o pin# description vdd p positive power supply vss p ground fg o frequency generator out2 o output pin 2 out1 o output pin 1 name p/i/o pin# description vcc p positive power supply out1 o output pin #1 out2 o output pin #2 vss p ground name p/i/o pin# description vcc p positive power supply out1 o output pin #1 out2 o output pin #2 fg o frequency generator vss p ground supplyvoltage vcc --------------------------20v output / fg breakdown voltagevout/vfg--------------------- 25v magnetic flux density b --------------------------unlimited reverse protection voltage vr--------------------------20v outputcurrent continuous ic--------------------------300ma hold current ih ------------------------ 400ma peak current ip ------------------------- 800ma fg on current (continuous) if -------------------------- 20ma operating temperaturerange ta--------------------------(-20 ? c to +125 ? c) storage temperaturerange ts--------------------------(-65 ? c to +150 ? c) package power dissipation pd -------------------------- 350mw for sot-25 500mwforsip-4l sip-5l ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. (t=+25 ? c,vcc=2.8v to 20v) characteristic symboltestconditions min typmaxunits supply voltage vcc v output saturation voltage vout(sat)vcc=20v,ic=200ma b > bop v fg saturation voltage vfg(sat)vcc=20v,if=10ma b > bop v output leakage current ileakagevcc=20v, b < brp < ua supply current isupplyvcc=20v, output & fg open ma output / fg rising time tr vcc=12v, rl=820 cl=20pf 3.0 us output / fg falling time tf vcc=12v, rl=820 cl=20pf us output / fg time differential t vcc=12v,rl=820 cl=20pf us ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. characteristics symbolquantity ta= -20 ? c to +90 ? c min typ. max unit operate point bop grade a grade b grade c 30 50 40 70 70 120 gauss release point brp grade a grade b grade c -50 -30 -70 -40 -120 -70 gauss hysteresis window bop-brp 40 150gauss sip- 4l: wsh41fc-xpa n elec.grade sip- 5l: wsh41fc-xpc n sip-4l&sip-5l: sot-25: wsh41fc-xpd n 1: a grade (50 gauss) 2 : b grade (70 gauss) 3 : c grade (120 gauss) elec.grade sot-25: n: no-lead process 1 :a grade (50 gauss) 2: b grade (70 gauss) ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sip-4l sip-5l ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sot-25 ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sot-25 ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sip-4l ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sip-5l ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sot-25 figure 1. sip-4l figure 2. ? winson, 2003 jan wsh41fc winson reserves the right to make changes to improve reliability or manufacturability. sip-5l figure 3. ? winson, 2003 jan |
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