AH2984 document number: ds31698 rev. 4 - 2 1 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 two phase hall-effect smart fan motor controller description the AH2984 is a single-chip soluti on for driving two-coil brushless direct current (bldc) fans and motors. the device includes a hall- effect sensor, dynamic offset correction and two complementary open-drain output drivers with internal zener diode protection. it is optimized for low start-up voltage. to help protect the motor coils, the AH2984 provides rotor lock protection which shuts down output dr ives if rotor lock is detected. the device automatically re-starts when the rotor lock is removed. over temperature shutdown prov ides thermal protection for the device. the AH2984 is available in sip4 and sot89-5 packages. features ? single-chip solution ? operating voltage: 2.5v to 15v ? built-in hall sensor and input amplifier ? rotor lock protection (lock detection, output shutdown and automatic re-start) ? built-in reverse voltage protection diode ? built-in zener protection for output drivers ? average output current up to 500ma ? packages: sip-4 and sot89-5 ? ?green? molding compound ? totally lead-free & fully rohs compliant (notes 1 & 2) ? halogen and antimony free. ?green? device (note 3) pin assignments applications ? two-coil bldc cooling fans ? low voltage/ low power bldc motors notes: 1. no purposely added lead. fully eu directiv e 2002/95/ec (rohs) & 2011/6 5/eu (rohs 2) compliant. 2. see http://www.diodes.com/quality/lead_free.html for more in formation about diodes incorporated?s definitions of halogen- a nd antimony-free, "green" and lead-free. 3. halogen- and antimony-free "green? products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total br + cl) and <1000ppm antimony compounds. 1 2 3 7 4 5 dob do gnd nc vdd AH2984 (top view) gnd AH2984 1 2 4 3 1 : v dd 2 : do 3 : dob 4 : gnd (top view) sip- 4 sot89-5
AH2984 document number: ds31698 rev. 4 - 2 2 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 typical applications circuit (note 4) (1) for sip-4 vdd gnd 12v l1 l2 AH2984 12 3 4 d2 c d1 vdd do dob gnd 12v brushless dc fan (2) for sot89-5 AH2984 13 2 vdd (12v) l1 l2 d2 5 4 gnd c d1 nc dob vdd do gnd gnd 12v brushless dc fan note: 4. d1 (zener diode) and capacitor c are for power stabilization. recommended value of c is 1 f/ 50v (e-cap). diode d2 is optional and helps to protect the device and fan coils from reverse power conditions . the AH2984 also includes an internal reverse blocking diode at v dd pin. pin descriptions pin name sip-4 sot89-5 description v dd 1 1 input power do 2 3 output pin dob 3 4 output pin gnd 4 2 ground nc ? 5 no connection
AH2984 document number: ds31698 rev. 4 - 2 3 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 functional block diagram (1) for sip-4 hall plate control logic regulator lock detect, shutdown and automatic re-start vdd dob do amp. 1 2 3 4 gnd (2) for sot89-5 hall plate control logic regulator vdd dob do amp. 1 3 4 2 gnd nc 5 lock detect, shutdown and automatic re-start
AH2984 document number: ds31698 rev. 4 - 2 4 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 absolute maximum ratings (@t a = +25c, unless otherwise specified.) symbol conditions rating unit v dd supply voltage 18 v v rdd reverse v dd polarity voltage -15 v i o ( ave ) output current (note 5) 500 ma i o (p eak as hold ) 800 p d power dissipation sip-4 550 mw sot89-5 800 mw t st storage temperature -55 to +150 ? c t j maximum junction temperature +150 ? c ja thermal resistance (note 6) sip-4 227 ? c/w sot89-5 168 ? c/w jc thermal resistance (note 6) sip-4 49 ? c/w sot89-5 36 ? c/w t j t a tc jc ? ja ? recommended operating conditions (@t a = +25c, unless otherwise specified.) symbol parameter conditions min max unit v dd supply voltage operating 2.5 15 v t a operating ambient temperature (note 5) operating -40 +105 ? c electrical characteristics (@t a = +25c; v dd = 12v; unless otherwise specified, note 4) symbol characteristics conditions min typ. max unit i dd supply current operating, v dd = 12v 2.0 3.5 5.0 ma t on locked protection on time ? ? 0.25 ? s t off locked protection off time ? ? 3.25 ? s r dut y locked protection duty ratio t off /t on ? 13 ? ? r ds(on) output on resistance i o = 300ma ? 1 1.67 ? i o = 500ma ? 1.25 1.8 v z output zener-breakdown voltage (note 7) 24 33 42 v notes: 5. shall not exceed p d and safety operation area. 6. ja should be confirmed with heat sink thermal resistance. sot89 exposed pad soldered to minimum recommended landing pads (see pac kage outline dimension section) on 2?x2? two-layer 2oz.copper fr4 pcb with thermal vias in the exposed pad connecting to the copper flood on the bottom layer. 7. the v z value is in d.c volt age measurement. the v z may vary with coils in a.c. voltage measurements.
AH2984 document number: ds31698 rev. 4 - 2 5 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 magnetic characteristics (t a = +25 ? c, v dd = 2.5v to 15v, note 8) (1mt=10 gauss) symbol characteristics min typ. max unit b op operate point 5 30 60 gauss b rp release point -60 -30 -5 gauss b hy hysteresis 20 60 120 gauss note: 8. the magnetic characteristics may vary wi th supply voltage, operating temperature and after soldering. operating characteristics off op rp on output voltage in volts 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 dob do ? marking side s ( sip-4) n marking side s (sot89-5 ) n
AH2984 document number: ds31698 rev. 4 - 2 6 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 performance characteristics (1) sip-4 t a ( ? c) 25 50 60 70 80 85 90 95 100 p d (mw) 550 440 396 352 308 286 264 242 220 t a ( ? c) 105 110 115 120 125 130 135 140 150 p d (mw) 198 176 154 132 110 88 66 44 0 (2) sot89-5 t a ( ? c) 25 50 60 70 75 80 85 90 95 100 p d (mw) 800 640 576 512 480 448 416 384 352 320 t a ( ? c) 105 110 115 120 125 130 135 140 145 150 p d (mw) 288 256 224 192 160 128 96 64 32 0 0 100 200 300 400 500 600 0 25 50 75 100 125 150 p d (mw) t a ( o c) power dissipation curve 0 100 200 300 400 500 600 700 800 900 0 25 50 75 100 125 150 p d (mw) t a (c) power dissipation curve -40 105 -40 105
AH2984 document number: ds31698 rev. 4 - 2 7 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 ordering information (note 9) AH2984 - x g - x packing b : bulk p : sip-4l package green g : green 13 : tape & reel y : sot89-5l device package code packaging (note 9) bulk 13? tape and reel quantity part number suffix quantity part number suffix AH2984-pg-b p sip-4 1000 -b na na AH2984-yg-13 y sot89-5 na na 2500/tape & reel -13 note: 9. for packaging details, go to our website at http://www.diodes.com/p roducts/packages.html marking information (1) sip-4 2984 part number (top view) y ww x x : internal code : a~z : green y : year : 0~9 ww : week : 01~52, " 52" represents 52 and 53 week (2) sot89-5 1 2 3 5 7 4 (top view) y : year : 0~9 w : week : a~z : 1~26 week; x : internal code a~z : green a~z : 27~52 week; z represents 52 and 53 week xx : identification code xx y w x device package identification code AH2984 sot89-5 k1
AH2984 document number: ds31698 rev. 4 - 2 8 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 package outline dimensions (all dimensions in mm.) (1) package type: sip-4l a e d j f l 1 b 1 e 1 l c a 4 2 x a 3 2 x a 1 2 x a 2 2 x s b 2 0 . 3 x 4 5 2 x sip-4 dim min max typ a 1.45 1.65 1.55 b1 0.38 0.44 0.40 b2 ? ? 0.48 c 0.35 0.45 0.40 d 5.12 5.32 5.22 e1 1.24 1.30 1.27 e 3.55 3.75 3.65 f 0.00 0.20 ? j 4.10 4.30 4.20 l 14.00 14.60 14.30 l1 1.32 1.52 1.42 s 0.63 0.83 0.73 a1 ? 5 3 a2 4 7 5 a3 4 7 5 a4 ? 5 3 all dimensions in mm
AH2984 document number: ds31698 rev. 4 - 2 9 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 package outline dimensions (all dimensions in mm.) (2) package type: sot89-5l 1.24/1.44 sot89-5 dim min max typ a 1.40 1.60 1.50 b 0.50 0.62 0.56 b1 0.44 0.54 0.48 c 0.35 0.43 0.38 d 4.40 4.60 4.50 d1 1.62 1.83 1.733 e 2.40 2.60 2.50 e ? ? 1.50 h 3.95 4.25 4.10 l 0.65 0.95 0.80 all dimensions in mm e h d 1 b 1 b e c l a d 8 4 x r 0 . 2 0 0 l
AH2984 document number: ds31698 rev. 4 - 2 10 of 10 www.diodes.com december 2013 ? diodes incorporated a h2984 important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries rese rve the right to make modifications, enhanc ements, improvements, corrections or ot her changes without further notice to this document and any product descri bed herein. diodes incorporated does not assume any liability ari sing out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products described herein in such applica tions shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability w hatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes inco rporated products for any unintended or una uthorized application, customers shall i ndemnify and hold diodes incorporated and its representativ es harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death a ssociated with such unintended or unauthorized application. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. this document is written in english but may be translated into multiple languages for reference. only the english version of t his document is the final and determinative format released by diodes incorporated. life support diodes incorporated products are specifically not authorized for use as critical com ponents in life support devices or systems without the express written approval of the chief executive offi cer of diodes incorporated. as used herein: a. life support devices or syst ems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when proper ly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support devic e or system whose failure to perform can be reasonably expect ed to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifi cations of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-rel ated requirements concerning the ir products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or s ystems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporate d and its representatives against any damages arisi ng out of the use of diodes incorporated pr oducts in such safety-critical, life suppor t devices or systems. copyright ? 2013, diodes incorporated www.diodes.com
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