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zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 1 of 19 www.diodes.com february 2012 ? diodes incorporated new product description the zxbm2004 is a 2-phase, brushless direct current (bldc) motor control pre-driver with variable pwm speed control suitable for fan and blower motors. for system flexibility, motor speed can be controlled by changing spd pin voltage which can be either from thermistor network, external voltage or pwm signal. to help protect the motor coil, the zxbm2004 provides rotor lock protection which shuts down the output drive if rotor lock is detected. the devic e automatically re-starts when the rotor lock is removed. a tachometer output is provided by open-drain frequency generator (fg) pin which allows external interface to monitor motor rotation or speed. t he fg output is the magnetic change frequency. the zxbm2004 is available in small space saving low profile u-qfn3030-16 and qsop-16 packages. features ? supports two-phase bldc motor control ? operating voltage: 4.7v to 18v o can be extended with external regulator ? pwm speed control via external thermister, dc voltage or pwm signals ? reference voltage output ? built-in hall amplifier allows direct connection of hall element ? rotor lock protection (lock detection, output shutdown and automatic re-start) ? rotor lock detect (rd) output ? minimum speed setting ? frequency generator (fg) output for speed measurements ? low noise ? space saving low profile u-qfn3030-16 and qsop-16 packages ? ?green? molding compound pin assignments applications ? desktop pc and servers fans and blowers ? instrumentation fans ? central heating blowers ? automotive instrument cooling and climate control ? extractor fans ? general motors and pumps ( top view ) qsop-16 v cc spd h+ h- gnd ph1 ph2 c pwm c lck fg rd v+op thref s min n / c n/c 1 zxbm 2004 (top view ) u-qfn3030-16 h- nc ph1 fg gnd rd h+ v+op ph2 spd nc thref c pwm v cc s min c lck
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 2 of 19 www.diodes.com february 2012 ? diodes incorporated new product typical application circuit pin descriptions pin name description h+ hall input to non-inverting input of internal operational amplifier h- hall input to inverting input of internal operational amplifier thref reference output voltage spd speed control pin; the control signal voltage should be between 3v to 1v for 0% to 100% (full speed) speed control c pwm pwm frequency setting pin: connect a capacitor from this pin to ground (0v) to set pwm frequency. capacitor of 0.1nf will give pwm frequency of 24khz typical. s min minimum speed setting pin: voltage between 3v to 1v on this pin sets the minimum speed between 0% to full speed. lowest minimum speed achieved depends on the motor coil design. gnd supply return ground pin c lck rotor lock detect and auto re-start timing pin: connect a capacitor from this pin to ground to set the lock detect and restart timing. rd rotor lock detect pin: open collector ou tput to indicate rotor lock detection connect a pull-up resistor from the pin to the pull-up supply rail fg frequency generator output to provide a tachometer signal ph1 phase-1 low-side external power switch drive output pi n: darlington emitter follower output with active pull down to give source/sink current of 80ma/16ma ph2 phase-2 low-side external power switch drive output pi n: darlington emitter follower output with active pull down to give source/sink current of 80ma/16ma v+op phase output supply voltage pin: the pin allows to optimize the supply to output drive depending on whether external power switch is bipolar switch or mosfet v cc power supply pin
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 3 of 19 www.diodes.com february 2012 ? diodes incorporated new product functional block diagram (note 1) speed & lock detect hall fg c lck spd h+ h- hall amp locked rotor detect phase drive & control gnd v cc set min speed vref smin thref ph2 lo ph1 lo vcc speed control voltage v spd vcc c pwm d2 rd v+op pwm osc supply voltage l1 l2 set phase drive current limit vcc hall bias d1 notes: 1. the zxbm2004 has an open-collector fg and rd. typically a pull-up resistor of 10k ? is recommended from fg or rd pin to the supply voltage.
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 4 of 19 www.diodes.com february 2012 ? diodes incorporated new product absolute maximum ratings (t a = 25 c, unless otherwise noted, note 2) symbol characteristics values unit v ccmax supply voltage -0.6 to +20 v i ccmax ic input current 100 ma p dmax power dissipation (note 4) qsop-16 500 mw u-qfn3030-16 (note 3) 1500 t a operating ambient tem perature -40 to +110 o c t stg storage temperature range -55 to +150 o c note: 2. stresses greater than the 'absolute maximum ratings' sp ecified above, may cause permane nt damage to the device. these are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. device reliability may be affected by exposure to absolute ma ximum rating conditions for extended periods of time. 3. u-qfn3030-16 dissipation is based on a two-layer 2oz. copper 2?x 2? fr4 substrate pcb with thermal vias to the bottom lay er. recommended operating conditions (t a = 25 c) symbol parameter conditions min max unit v cc supply voltage operating 4.7 18.0 v t a operating temperature range operating -40 +110 o c electrical characteristics ( t a = 25 c, v cc = 12v ) symbol characteristics conditions min typ. max unit i cc supply current no load (note 4) - 5.5 7.5 ma vin hall amplifier input voltage diff peak to peak 40 mv v cm hall amplifier common mode voltage 0.5 v cc -1.5 v v ofs hall amplifier input offset voltage 7 mv i bs hall amplifier bias current 400 700 na v oh ph1 and ph2 output high voltage i oh = 80ma v cc -2.2 vcc -1.8 v v ola ph1 and ph2 output low voltage i oh =16ma (note 5) 0.4 0.6 v v olb ph1 and ph2 output low voltage i oh = 50ua (note 6) 0.4 0.6 v i oh ph1 and ph2 output source current 80 ma i ol ph1 and ph2 output sink current 16 ma i pwmc c pwm charge current 4.5 7.85 a i pwmd c pwm discharge current 38 65 a v thh c pwm high threshold voltage 3 v v thl c pwm low threshold voltage 1 v f pwm pwm frequency c pwm = 0.1nf 24 khz notes: 4. measure with pins h+, h-, c lck and c pwm and all other signal pins open circuit 5. measured when opposing phase output is low 6. measured when opposing phase output is high
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 5 of 19 www.diodes.com february 2012 ? diodes incorporated new product electrical characteristics (cont.) ( t a = 25 c, v cc = 12v ) symbol characteristics conditions min typ. max unit v thref thref reference output voltgae i othref = 100a 2.88 2.96 3.10 v i othref thref output current 1 ma i ismin s min input current v in = 2v, spd=open -0.25 -0.3 a v spdl spd voltage minimum 100% pwm drive 1 v v spdh spd voltage maximum 0% pwm drive 3 v i ispd spd voltage maximum v in = 2v 0.8 2 a i lckc c lck charge current 2.8 3.8 a i lckd c lck discharge current 4.6 054 a v clckthh c lck high threshold voltage 3 v v clckthl c lck low threshold voltage 1 v lock condition on:off ratio 1:12 i fgol fg low level output current 5 ma v fgol fg low level output voltage i fgol = 5ma 0.5 v i rdol rd low level output current 5 ma v rdol rd low level output current i rdol = 5ma 0.5 v t cd commutation delay 7.5 s
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 6 of 19 www.diodes.com february 2012 ? diodes incorporated new product functional descriptions h+ and h- hall inputs the rotor position is detected by a hall s ensor, with the output applied to the h+ and h-pins. this sensor can be either a 4 pi n 'naked' hall device or of the 3 pin buffer ed switching type. for a 4 pin device the di fferential hall output signal is connecte d to the h+ and h-pins. for a buffered hall sensor the hall device out put is attached to the h+ pin, with a pull-up attached if needed, whilst the h-pin has an external potentia l divider attached to hold the pin at half v cc . when h+ is high in relation to h-, ph2 is the active drive. thref - output reference voltage this is a reference voltage of nominal 3v. it is designed for the ability to 'source' and theref ore it will not 'sink' any curr ent from a higher voltage. the current drawn from the pin by the minimum speed potential divider to pin s min and any voltage setting network should not exceed 1ma in total at maximum temperature. spd - speed control input the voltage applied to the spd pin provides control over mo tor speed by varying the pulse width modulated (pwm) drive ratio at the ph1 and ph2 outputs. the control signal takes the form of a voltage input of range 3v to 1v, representing 0% to 100% drive respectively. if variable speed control is not required this pin can be left with an external potential divider to set a fixed speed or tied to ground to provide full speed i.e. 100% pwm drive. if required this pin can also be used as an enable pin. the applicatio n of a voltage >3.0v will fo rce the pwm drive fully off, in effect disabling the drive. s min ? minimum speed setting a voltage can be set on s min pin via a potential divider between the thref and gnd. this voltage is monitored by the spd pin such that internally spd voltage cannot rise above s min voltage. as a higher voltage on the spd pin represents a lower speed it therefore restrict s the lower speed range of the fan. if this feat ure is not required the pin is left tied to thref so no minimum speed will be set. if the fan is being controlled from an extern al voltage source onto the spd pin then ei ther this feature should not be used or if it is required then a resistor greater than 1k should be placed in series with the spd pin. c pwm ? output pwm frequency setting this pin has an external capacitor attached to set the pwm fr equency for the phase drive outputs. a capacitor value of 0.1nf will provide a pwm frequency of typically 24khz. the c pwm timing period (t pwm ) is determined by the following equation: () () pwmd thl thh pwmc thl thh pwm i cvv i cvv t ? + ? = where: c = (c pwm +15) in pf v thh and v thl are the c pwm pin threshold voltages i pwmc and i pwmd are the charge and discharge currents in a. t pwm is in ms as these threshold voltages are nominally set to v thh = 3v and v thl = 1v the equations can be simplified as follows: pwmd pwmc pwm i c2 i c2 t +=
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 7 of 19 www.diodes.com february 2012 ? diodes incorporated new product functional description (cont.) c lck - locked rotor timing capacitor should the fan stop rotating for any reason, i.e. an obstruction in the fan blade or a seized bearing, then the device will ent er a rotor locked condition. in this condition after a predetermined time (t lock ) the rd pin will go high and the phase outputs will be disabled. after a further delay (t off ) the controller will re-enable the phase drive for a defined period (t on ) in an attempt to re-start the fan. this cycle of (t off ) and (t on ) will be repeated indefinitely or until the fan re-starts. gnd ? supply return this is the device supply ground return pin and will ge nerally be the most negative supply pin to the fan. rd - rotor lock detect output this pin is the locked rotor status output as referred to in the c lck timing section above. it is high when the rotor is stopped and low when it is running. this is an open collector drive giving an active pull down with the high level being provided by an external pull up resistor. fr and rd timing diagram t lock t off t on hall c lck fg rd v thh v thl
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 8 of 19 www.diodes.com february 2012 ? diodes incorporated new product functional descriptions (cont.) fg -frequency generator (tachometer) output this is the frequency generator output and is a buffered signal from the hall sensor. this is an open collector drive giving an active pull down with the high level being provided by an external pull up resistor. ph1 and ph2 output drives this pair of outputs drives the external devices. these outputs provide both t he commutation and pwm waveforms. the outputs are of the darlington emitter follower type with an acti ve pull-down to help faster switch off when using bipolar devices. when in the high state the outputs will provide up to 80ma of drive into the base or gates of external transistors as shown in the typical application circuit following. when in the low state the active phase drive is capable of sinking up to 16ma when driving low to aid turn off times during pwm operation. when the phase is i nactive the output is held low by an internal pull-down resistor. v+op phase outputs supply voltage this pin is the supply to the phase ou tputs and will be connected differently dependant upon external transistor type. for bipolar devices this pin will be connected by a resistor to the v cc pin. the resistor is used to control the current into the transistor base so its value is chosen accordingly. for mosfet devices the pin will connect directly to the v cc pin. v cc ? supply voltage this is the device internal circuitry supply voltage. for 5v to 12v fans this can be supplied dire ctly from the fan motor suppl y. for fans likely to run in excess of the 18v maximum rating for the device this will be supplied from an external regulator such as a zener diode.
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 9 of 19 www.diodes.com february 2012 ? diodes incorporated new product application note the zxbm2004 is primarily controlled by a voltage on the spd pin. a voltage of 1v represents a 100% pwm at the phase outputs and in turn represents full spee d. 3v on the spd pin conversely represents 0% pwm. the motor can therefore be controlled simply by applying a contro l voltage onto the spd pin with the mi nimal use of external components. this voltage control method easily lends itself to control by other signal types. for example if a thermistor is applied to the spd pin a varying voltage can be generated at the spd pin as the resistance of the thermistor varies with temperature. a common form of control of fans is by a pwm signal derived from a central processor or controller. this signal can be converted into a voltage and that volta ge adjusted as necessary to compensate for motor none linearity, inclusion of the minimum speed feature etc. full applications details and further exampl es of how to control the zxbm2004 are av ailable in the applications notes an41, an42 and an43. fig 1. 12v typical circuit for thermistor controlled speed
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 10 of 19 www.diodes.com february 2012 ? diodes incorporated new product application note (cont.) fig. 2 typical circuit for external pwm controlled speed (single mosfet) fig. 3 typical circuit for 48v input and external pwm control
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 11 of 19 www.diodes.com february 2012 ? diodes incorporated new product application note (cont.) fig. 4 typical circuit for constant speed operation
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 12 of 19 www.diodes.com february 2012 ? diodes incorporated new product application note (cont.) external drive transistors diodes offers a range of devices that ar e ideally suited to interface between the zxbm2004 controller and the motor. the following tables show a selection of products. if your needs are not covered by this selection then please refer to the more comprehensive listings that can be found on the diodes website: www.didoes.com mosfets part number type bv dss ( v ) i d ( a ) r ds(on) @ v gs = 10v \( ) package power switch zxmn10a09k n 100 7.7 0.085 to252-3l zxmn10a25k n 100 6.4 0.125 to252-3l zxmn10a25g n 100 4.0 0.125 sot223 zxmn10a11g n 100 2.4 0.35 sot223 zxmn10a08dn8 2 x n 100 2.1 0.25 so8 zxmn10b08e6 n 100 1.9 0.230 sot23-6 zxmn10a07z n 100 1.4 0.7 sot89 zxmn6a09k n 60 11.2 0.04 to252-3l zxmn6a25k n 60 10.7 0.05 to252-3l dmn6068lk3 n 60 8.5 0.068 to252-3l zxmn6a09g n 60 7.5 0.04 sot223 zxmn6a25g n 60 6.7 0.05 sot223 zxmn7a11k n 60 6.1 0.120 to252-3l zxmn6a09dn8 2 x n 60 5.6 0.04 so8 dmn6068se n 60 5.6 0.068 sot223 zxmn6a08g n 60 5.3 0.08 sot223 zxmn6a25dn8 2 x n 60 4.7 0.055 so8 zxmn6a11z n 60 3.6 0.120 sot89 zxmn6a07z n 60 2.2 0.250 sot89 zxmn6a07f n 60 1.4 0.250 sot23
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 13 of 19 www.diodes.com february 2012 ? diodes incorporated new product application note (cont.) bipolar transistors part number type v ceo ( v ) i c ( a ) v ce(sat) @i c /i b ( mv @ a/ma ) package power switch fzt855 npn 150 4 65 @ 0.5/50 sot223 fmmt624 npn 125 1 150 @ 0.5/50 sot23 zx5t853g npn 100 6 125 @ 2/100 sot223 zxtn19100cz npn 100 5.25 65 @ 1/100 sot89 zxtn25100bfh npn 100 3 135 @ 0.5/10 sot23 zxtn25100dfh npn 100 2.5 170 @ 0.5/10 sot23 fcx493 npn 100 1 300 @ 0.5/50 sot89 fcx1053a npn 75 3 200 @ 1/10 sot89 zxtn19060cg npn 60 7 155 @ 1/10 sot223 zx5t851g npn 60 6 135 @ 2/50 sot223 dxt2010p5 npn 60 5 70 @ 1/10 powerdi5 fcx493a npn 60 1 500 @ 1/50 sot89 fcx619 npn 50 3 260 @ 2/50 sot89 fmmt619 npn 50 2 220 @ 2/50 sot23 fcx619 npn 50 3 260 @ 2/50 sot89 drive buffer and level shift fmmt493 npn 100 1 300 @ 0.5/50 sot23 fmmt493a npn 60 1 250 @ 0.5/50 sot23 zxtn2038f npn 60 1 250 @ 0.5/50 sot23 dss4160 npn 60 1 140 @ 0.5/50 sot563
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 14 of 19 www.diodes.com february 2012 ? diodes incorporated new product thermal performance characteristics (1) package type: qsop-16 (2) package type: u-qfn3030-16 (note 7) note: 7. u-qfn3030-16 dissipation is based on a two-layer 2oz. copper 2?x2? fr4 substrate pcb with thermal vias to the b ottom layer. 80 100 120 140 180 0 204060 ambient temperature (c) qsop16 derating curve 0.6 0.5 0.4 0.3 0.2 0.1 0 maxim u m p o we r (w) 0.6 0.5 0.4 0.3 0.2 0.1 0 maxim u m p o we r (w) 80 100 120 140 180 0204060 ambient temperature (c) qsop16 derating curve
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 15 of 19 www.diodes.com february 2012 ? diodes incorporated new product ordering information device packaging (note 8 & 9) 13? tape and reel quantity part number suffix zxbm2004q16tc qsop-16 2500/tape & reel tc ZXBM2004JA16TC u-qfn3030-16 3000/tape & reel tc notes: 8. pad layout as shown on diodes inc. suggested pad la yout document ap02001, which can be found on our website at http://www.diodes.c om/datasheets/ap02001.pdf 9. eu directive 2002/95/ec (rohs) & 2011/65/eu (rohs 2) comp liant. no purposely added lead. halogen and antimony free. please visit our website at http://www.diodes .com/products/lead_free.html marking information (1) package type: qsop-16 part number package identification code zxbm2004q16tc qsop-16 zxbm 2004 (2) package type: u-qfn3030-16 part number package identification code ZXBM2004JA16TC u-qfn3030-16 24 zxbm2004 x tc packing package q16 : qsop-16 tc : 13" tape & reel j a 16 : u -qfn3030-16 xx ywz (top view) xx y w z : identification code : year : 0 ~ 9 : week : a ~ z : 1 ~ 26 week; a ~ z : 27 ~ 52 week: z represents 52 and 53 week : a ~ z : internal code
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 16 of 19 www.diodes.com february 2012 ? diodes incorporated new product package outline dimensions (all dimensions in mm) (1) package type: qsop-16 (2) package type: u-qfn3030-16 qsop-16 dim min max typ a 1.55 1.73 - a 1 0.10 0.25 - a 2 1.40 1.50 - b 0.20 0.30 - c 0.18 0.25 - d 4.80 5.00 - e 5.79 6.20 - e1 3.81 3.99 - e 0.635 bsc h 0.254 0.508 - l 0.41 1.27 - l1 1.03 ref l2 0.254 bsc r 0.0762 - - r1 0.0762 - - zd 0.23 ref 0 8 - 1 5 15 - 2 0 - - a ll dimensions in mm u-qfn3030-16 dim min max typ a 0.55 0.65 0.60 a1 0 0.05 0.02 a3 ? ? 0.15 b 0.18 0.28 0.23 d 2.95 3.05 3.00 d2 1.40 1.60 1.50 e 2.95 3.05 3.00 e2 1.40 1.60 1.50 e ? ? 0.50 l 0.35 0.45 0.40 z ? ? 0.625 all dimensions in mm side ? view a a3 a1 bottom ? view d d2 e e b (16x) l (16x) e2 (pin #1 id) z (8x) 0.450 r 0 . 2 0 0 ' ( ( = ' ( ( h e 3 , 1 $ $ $ 6 ( ( ' ( 7 $ , /
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zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 17 of 19 www.diodes.com february 2012 ? diodes incorporated new product suggested pad layout (1) package type: qsop-16 (2) package type: u-qfn3030-16 dimensions v alue (in mm) c 0.635 x 0.350 x1 4.795 y 0.1.450 y1 6.400 a ll dimensions in mm dimensions v alue (in mm) c 0.500 g 0.150 g1 0.150 x 0.350 x 1 1.800 y 0.600 y1 1.800 all dimensions in mm x (16x) y (16x) c y1 x1 g1 g y1 x1 y (16x) x (16x) c
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 18 of 19 www.diodes.com february 2012 ? diodes incorporated new product taping orientation for qsop-16 and u-qfn3030-16 notes: 10. the taping orientation of the other package type can be found on our website at http://www.diodes .com/datasheets/ ap02007.pdf.
zxbm2004 two phase variable speed motor control pre-driver zxbm2004 document number: ds33433 rev. 5 - 2 19 of 19 www.diodes.com february 2012 ? diodes incorporated new product 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 reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liabi lity arising 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 desc ribed herein in such applications 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 whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized a pplication. 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. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems 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 properly 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 device or system whose failure to perform can be reasonably expected 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 ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety-critical, life support devices or systems. copyright ? 2012, diodes incorporated www.diodes.com

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