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fd0252f FD0256F smart motor driver with embedded hall sensor this datasheet contains new product information. f eeling technology reserves the rights to modify the product specification without notice. no liability is assumed as a result of the use of t his product. no rights under any patent accompany t he sales of the product. rev1.3 dec. 18, 2008 p.1 feeling technology features motor driver with integrated hall sensor high current driving capability lock-shutdown protection & auto-restart function built-in rd(rotation detection) signal output soft-switch phase-switching technique to reduce v ibration and acoustic noise thermal shutdown protection pwm speed control(only available for FD0256F) available in both ts825(fd0252f) and ts826(FD0256F) p ackages general description fd0252f/FD0256F is a single coil motor driver with embedded hall sensor. it integrates the motor drive r with the hall sensor, which simplifies the pcb(printed circuit boa rd) design and make the fabrication of small-size m otors possible. lock-shutdown and auto-restart function keeps the m otor from being over-heated and restarts the motor after being locked. fd0252f/FD0256F is built-in the signal output of ro tation detection function, the system could detect the rotation status from this signal of motor when using fd0252f /FD0256F. soft-switch phase-switching technique is used to r educe the vibration and acoustic noise. thermal-shutdown protection ensures the motor drive r to operate under specified temperature ranges. all the protection mechanisms mentioned above combin e to provide a complete protecting scenario for the motor system, keep the motor system from possible damages and guarantee correct operations. block diagram figure.1 halogen free bias generator coil driver oscillator hall plate reset power-on digital control logics chopper amplifier pwm control
fd0252f FD0256F rev1.3 dec. 18, 2008 p.2 feeling technology pin connection figure.2 pin descriptions legend: i=input, o=output, i/o=input/output, p=powe r supply, g=ground functional descriptions refer to the block diagram (figure.1), fd0252f/fd02 56f is composed of the following building blocks: bias generator the bias generator provides precise, temperature- a nd process-insensitive bias references for the anal og blocks. these references guarantee proper operation of the ic under all conditions specified in this specifica tion. oscillator the built-in oscillator provides the clock signal f or the digital control logics power-on reset used to detect the power-up ramp and reset the digi tal circuits. chopper amplifier to achieve a higher magnetic sensitivity the choppe r amplifier structure is adopted in this design. us e of this structure dynamically removes both the offset and f licker noise at the same time. digital control logics hall sensor part C generates controlling signals f or the hall sensor. coil driver part C generates controlling signals f or the coil driver. signal part C generates an output signal of the rot ation detection(rd). name i/o fd0252f FD0256F description rd o 1 1 rotation detection vss g 2 2 ground no o 3 3 driver output so o 4 4 driver output vdd p 5 5 positive power supply pwm i - 6 pulse width modulation speed control pwm vdd so vdd so no vss rd 1 2 3 5 4 1 2 3 6 5 4 no vss rd FD0256F fd0252f ce cd g g
fd0252f FD0256F rev1.3 dec. 18, 2008 p.3 feeling technology pwm control pwm(pulse-width modulation) is used for the speed c ontrol for FD0256F. 2 types of pwm input signals ca n be used : 1. voltage mode pwm : applying a constant(dc) voltage to the pwm pin and t he FD0256F will generate pwm pulses internally with the on duty cycle ratio according to the diagram below(figure.3), which can be utilized by the user to control the speed of the motor. the rotation speed will be higher if the voltage applied to the pwm pin is hig her. figure.3 2. pulse mode pwm : user can also apply pwm pulses directly to the pwm pin. the FD0256F will pass this pulse to the coil d river with the original duty-cycle ratio. note: (1) this function is only available for FD0256F (2) while using pulse mode pwm, the high value of the input pulse should be higher than 0.5*vdd and t he low value should be lower than 0.14*vdd (3) the lower-limit for the pwm pulse frequency is 200hz, and the recommended frequency range is highe r than 30khz where the pwm input pulses will not gener ate acoustic noise. note. the pwm pin contains an internal pull-up resistor so the FD0256F will rotate at full-speed(100% on) when this pin is left un-connected(floating). "on" ratio 0.14 vdd 0.5 vdd 0% 100%
fd0252f FD0256F rev1.3 dec. 18, 2008 p.4 feeling technology absolute maximum ratings values parameter symbol conditions min. typ. max. unit operating temperature t op - -20 105 storage temperature t st - -40 150 dc supply voltage v dd , v rd - 6.5 v pwm high - >0.5v dd 6.5 v pwm voltage range pwm low - 0 <0.14v dd v supply current i dd - 3 ma continuous current i cont - 500 ma hold current i hold - 800 ma rd pin sink current i rd - 25 ma junction temperature t j - 170 p dts825 - 500 mw maximum power dissipation p dts826 - 520 mw ts825 0.290 /mw thermal resistance (note1) ja ts826 0.278 /mw ts825 0.020 /mw thermal resistance (note1) jc ts826 0.018 /mw magnetic flux density b unlimited gauss ir-reflow lead temperature t p 10sec 260 note1: device mounted with copper area of approximately 10 mm 2, 1?z, no air flow. (room temperature: 25 ) figure.4 figure.5 figure.6 255 5 o c 10 1 sec 150 10 o c 90 30 sec 2~5 o c /sec 2~5 o c /sec second ir-reflow soldering condition room temp 0 25 50 75 100 125 150 328 414 500 pd (mw) temp. ( ) o c ts825 power dissipation curve 175 242 156 70 0 105 o c 170 o c 0 25 50 75 100 125 150 340 430 520 pd (mw) temp. ( ) o c ts826 power dissipation curve 175 250 160 70 0 105 o c 170 o c
fd0252f FD0256F rev1.3 dec. 18, 2008 p.5 feeling technology recommended operating conditions values parameter conditions min. typ. max. unit supply voltage - 1.8 5.5 v ambient temperature - -10 90 electrical characteristics v dd =5.0v, t a =25 (unless otherwise specified) values parameter conditions min. typ. max. unit average supply current(no load) 1.8 ma output saturation voltage(rd) i rd = 10ma 0.5 v output leakage current(rd) v rd =5v 1 a on resistance(rpmos+rnmos) 0.8 thermal shutdown threshold 165 magnetic characteristics values parameter conditions min. typ. max. unit operate points ( b op ) 25 g release points ( b rp ) -25 g hysteresis 50 g hysteresis characteristics figure.7 no so v brp bop b bop brp v b
fd0252f FD0256F rev1.3 dec. 18, 2008 p.6 feeling technology application circuit reference figure.8 note : must use c1 capacitor for the decoupling between v dd and v ss and place the capacitor as close to the ic as possible. 1. zd1: v dd over-voltage stress protection diode. 2. r2: current limit resistor for open drain rd out put. 3. r3: pwm pull-up resistor for open drain pwm sourc e signal. 4. r4: de-coupling resistor for long-distance signa l transmission. option component mlcc (0603) 2.2uf/6.3v vdd 4.7 ohm (0603) vdd so no vss rd ce 1 2 3 5 4 r1 c1 d1 schottky diode 0.2v zd1 6.5v l1 r2 100 ohm (0603) mlcc (0603) 2.2uf/6.3v vdd 4.7 ohm (0603) vdd so no vss rd cd 1 2 3 6 4 r1 c1 d1 schottky diode 0.2v zd1 6.5v l1 r2 100 ohm (0603) pwm 5 r4 r3 1k ohm (0603) FD0256F fd0252f g g
fd0252f FD0256F rev1.3 dec. 18, 2008 p.7 feeling technology output waveforms description figure.9 fd0252/0256f operation waveforms descripti on note : 1. rd is an open drain output and the high level of th e signal depends on the external supply voltage. 2. the on torque time of motor is same as the re-st art time.
fd0252f FD0256F rev1.3 dec. 18, 2008 p.8 feeling technology fd0252/0256 output waveforms measurement figure.10 normal operation waveforms (fd0252f / fd0 256f full speed mode) figure.11 soft-switching waveforms (fd0252f / fd025 6f full speed mode) ch1: no output ch2: so output ch4: input current ch1: rd output ch2: no output ch3: so output ch4: input current
fd0252f FD0256F rev1.3 dec. 18, 2008 p.9 feeling technology figure.12 rotor lock and release waveforms (fd0252f / FD0256F full speed mode) ch1: rd output ch2: no output ch3: so output ch4: input current
fd0252f FD0256F rev1.3 dec. 18, 2008 p.10 feeling technology the ic laying aside mode declaration is as follows figure.13 motor cross section and distance with ic sensor pcb board pcb board ic marking side fan magnet chip
fd0252f FD0256F rev1.3 dec. 18, 2008 p.11 feeling technology 4 5 1 2 3 b e d e1 e e1 c d a2 package dimension (unit: mm) ts825 (halogen free) dimension in millimeters symbols min nom max a2 0.700 0.750 0.775 b 0.350 - 0.500 c 0.100 - 0.200 d 2.800 2.900 3.100 e 3.700 3.800 3.900 e1 1.500 1.600 1.700 e 0.950 bsc e1 1.900 bsc 1 4? 10? 12? sensor location 0.86mm 1.02mm 1 1 top view: marking side
fd0252f FD0256F rev1.3 dec. 18, 2008 p.12 feeling technology 4 5 1 2 3 b e d e1 e e1 c 6 d a2 package dimension (unit: mm) ts826 (halogen free) dimension in millimeters symbols min nom max a2 0.700 0.750 0.775 b 0.350 - 0.500 c 0.100 - 0.200 d 2.800 2.900 3.100 e 3.700 3.800 3.900 e1 1.500 1.600 1.700 e 0.950 bsc e1 1.900 bsc 1 4? 10? 12? sensor location 0.86mm 1.02mm 1 1 top view: marking side
fd0252f FD0256F rev1.3 dec. 18, 2008 p.13 feeling technology packing specification (tapping reel) ts825 top view: marking side
fd0252f FD0256F rev1.3 dec. 18, 2008 p.14 feeling technology ts826 top view: marking side
fd0252f FD0256F rev1.3 dec. 18, 2008 p.15 feeling technology packing quantity specification 3,500ea / 1 reel 3 reels / 1 inside box 4 inside boxes / 1 outside box ic pin connection marking distinguish part number lot number year mass production version so no vdd gnd rd so no vdd gnd rd pwm fd0252f FD0256F c e g c g d g halogen free order information part number package moq marking msl fd0252fr-g1 ts825 3,500ea / reel cexxxxg FD0256Fr-g1 ts826 3,500ea / reel cdxxxxg 3

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