single phase hall effect latch AH477A 1 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited data sheet general description the AH477A is an integrated hall sensor with h- bridged output driver designed for brushless dc motor applications. the device incl udes an on-chip hall sen- sor for magnetic sensing, an amplifier that amplifies the hall voltage, a comparator to provide switching hysteresis for noise rejection, a bi-directional drivers for sinking and driving large current load. it also includes an internal bandgap regulator to provide tem- perature compensated bias for internal circuits and allows a wide operating supply voltage range. placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold b op , the do is turned to sink and dob is turned to drive. this output state is held until the magnetic flux density reverses and falls below b rp, then causes do to be turned to drive and dob turned to sink. the AH477A is available in to-94 (sip-4l) package. features on-chip hall sensor operating voltage: 3.5v to 18v h-bridge output drivers for single coil internal bandgap regulator for temperature compensation low output switching current noise operating temperature: -20 o c to 85 o c low profile to-94 (sip-4l) package esd rating: 6000v (human body model) suitable for pwm power supply control speed applications single-coil brushless dc motor single-coil brushless dc fan figure 1. package type of AH477A to-94
single phase hall effect latch AH477A 2 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited data sheet figure 2. pin configuration of AH477A (front view) (to-94) pin configuration z4 package gnd dob do v cc pin description pin number pin name function 1 v cc supply voltage 2 do output 1 3 dob output 2 4 gnd ground 1 2 3 4
single phase hall effect latch AH477A 3 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited data sheet functional block diagram figure 3. functional block diagram of AH477A package temperature range part number marking id packing type to-94 -20 to 85 o c AH477Az4-ag1 477az4-g1 bulk AH477Az4-bg1 477az4-g1 bulk ordering information circuit type package z4: to-94 (sip-4l) AH477A - magnetic characteristics a: 5 to 70 gauss b: 100 gauss regulator hall sensor amplifier schmitt trigger pre- driver do dob v cc gnd 1 2 3 4 v cc v cc g1: green bcd semiconductor's pb-free products, as desi gnated with "g1" suffix in the part number, are rohs compliant and green.
single phase hall effect latch AH477A 4 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited data sheet parameter symbol value unit supply voltage v cc 20 v magnetic flux density b unlimited gauss output current continuous i o 250 ma hold 300 ma peak (start up) 600 ma power dissipation p d 550 mw thermal resistance die to atmosphere ja 227 o c/w die to package case jc 49 o c/w storage temperature t stg -50 to 150 o c esd (machine model) 600 v esd (human body model) 6000 v note 1: stresses greater than those li sted under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only, and functional operation of the de vice at these or any other conditions beyond t hose indicated under "recommended operating c onditions" is not implied. "a bsolute maximum ratings" for extended period may affect device reliability. parameter symbol min max unit supply voltage v cc 3.5 18 v frequency (pwm power) f 0.1 25 khz ambient temperature t a -20 85 o c recommended operating conditions absolute maximum ratings (note 1) (t a =25 o c) (t a =25 o c)
5 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited single phase hall effect latch AH477A data sheet parameter symbol test condition min typ max unit output saturati on voltage (sink) v sat v cc =14v, i o =200ma 0.45 0.65 v output saturation voltage (drive) v cc =14v, i o =200ma v cc - 1.3 v cc - 1.0 v cc v supply current i cc v cc =20v, output open 13.5 16 ma output rise time tr r l =820 ? , c l =20pf 0.5 1.0 s output fall time tf r l =820 ? , c l =20pf 0.5 1.0 s (t a =25 o c, v cc =14v, unless otherwise specified) electrical characteristics parameter symbol grade min typ max unit operating point b op a5 70 gauss b 100 releasing point b rp a-70 -5 gauss b -100 hysteresis b hys 70 gauss magnetic characteristics (t a =25 o c) test circuit n s marking side AH477A v cc do dob gnd 12 3 4 c1 0.1 f v cc 820 ?
single phase hall effect latch AH477A 6 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited data sheet magnetic hysteresis characteristics figure 6. supply current vs. supply voltage figure 5. dob out put vs. magnetism figure 7. supply current vs. ambient temperature figure 4. do output vs. magnetism -100 -50 0 50 100 0 2 4 6 8 10 12 14 do output (v) magnetism (gs) typical performance characteristics -100 -50 0 50 100 0 2 4 6 8 10 12 14 dob output (v) magnetism (gs) 0 2 4 6 8 10 12 14 16 18 20 0 2 4 6 8 10 12 14 16 t a =25 o c i cc (ma) v cc (v) -20-10 0 1020304050607080 0 4 8 12 16 20 v cc =14v i cc (ma) t a ( o c)
7 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited single phase hall effect latch AH477A data sheet typical performance characteristics (continued) figure 8. b op /b rp /b hys vs. supply voltage figure 9 . b op /b rp /b hys vs. ambient temperature -20 0 20 40 60 80 0 100 200 300 400 500 600 700 800 900 1000 i o =200ma v sat (mv) t a ( o c) driver sink figure 10. v sat vs. i o figure 11. v sat vs. ambient temperature 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 -100 -80 -60 -40 -20 0 20 40 60 80 100 t a =25 o c b op b rp b hys b op /b rp /b hys (gs) v cc (v) -20-10 0 1020304050607080 -100 -80 -60 -40 -20 0 20 40 60 80 100 v cc =14v b op b rp b hys b op /b rp /b hys (gs) t a ( o c) 50 75 100 125 150 175 200 225 250 275 300 0 200 400 600 800 1000 1200 t a =25 o c v sat _up v sat _down v sat (v) i o (ma)
single phase hall effect latch AH477A 8 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited data sheet typical performance characteristics (continued) figure 12. p d vs. ambient temperature typical application figure 13. typical application circuit AH477A v cc do dob gnd 12 3 4 c1 0.1 p f v cc d1 coil -25 0 25 50 75 100 125 150 0 200 400 600 800 p d (mw) t a ( o c)
9 oct. 2009 rev. 1. 2 bcd semiconductor manufacturing limited single phase hall effect latch AH477A data sheet mechanical dimensions unit: mm(inch) to-94 package sensor location 3.780(0.149) 4.080(0.161) 0.500(0.020) 0.700(0.028) 1.520(0.059) 1.720(0.067) 0.700(0.028) 0.900(0.035) 0.360(0.014) 0.510(0.020) 4.980(0.196) 5.280(0.208) 0.380(0.015) 0.550(0.022) 0.360(0.014) 0.500(0.020) 14.000(0.550) 15.300(0.602) 1.270(0.050) typ 3.710(0.146) 3.910(0.154) 45 typ 3.450(0.136) 3.750(0.148) 1.100(0.043) 1.400(0.055) 1.720(0.068) 2.020(0.080) (for hall ic)
important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited
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