silicon touch technology inc. ?W@^?I????? 9-7f-1 prosperity road i science-based industrial park hsinchu, taiwan 300, r.o.c. tel 886-3-5645656 fax 886-3-5645626 FD177 version : a.003 issue date : 2008/06/10 file name : sp-FD177-a.003.doc total pages : 8 single coil brushless dc motor drivers with soft-switching ( 2.0 to 6.5 volts )
FD177 version a.003 page 1 c???? silicon touch technology inc. fd17 7 general specifications FD177 is a single coil dc brushless moto r driver ic with soft-switching, locked protection, thermal shut dow n protection circuit, power polarity reverse protection and frequency generator. the driver is optimal for single coil fan applications with less external components. features and benefits z support single-phase full wave brushless dc motor driver z built-in hall sensor input signal amplifier z low voltage startup (vdd=2.0v) z high driving capability z lock detection and automatic self-restart z power polarity reverse protection z thermal shut down protection circuit z thin, compact, highly reliable package (tsot-28) pin description o1 vss fgr hp o2 vdd nc hn package : tsot-28 no. name description 1 o1 output driving & sinking pin 1 2 vss ground pin 3 fgr frequency generator 4 hp hall sensor in+ 5 hn hall sensor in- 6 nc none connection 7 vdd power supply pin 8 o2 output driving & sinking pin 2
FD177 version a.003 page 2 c???? silicon touch technology inc. fd17 7 absolute maximum ratings ( unless otherwise noted, vdd=5v, t a = 25 c ) characteristic symbol rating unit supply voltage v ddm 6.5 v output current i out 500 ma output current at locked (tsot-28) i ol1 1 a maximum fgr output current i fgr_max 10 ma maximum fgr output voltage v fgr_max 6.5 v operating temperature range t opr -30 ~ 85 c storage temperature range t stg -65 ~ 150 c power dissipation (tsot-28) p d 568 mw thermal resistance, junction to ambient j a_tsot28 220 c/ w thermal resistance, junction to case jc_tsot28 92 c/ w
FD177 version a.003 page 3 c???? silicon touch technology inc. fd17 7 electrical characteristics ( unless otherwise noted, vdd=5v, t a = 25 c ) limit characteristic sym. condition min. typ. max. unit operation voltage v dd 2 5 6.5 v supply current icc 3 5 ma maximum output voltage range v oh i out = 300 ma 4.5 4.65 - v minimum output voltage range v ol i out = 300 ma - 0.35 0.5 v fg output low voltage v fgrol i fgr = 3 ma - 0.25 0.4 v hall amplifier offset v offset -9 0 9 mv input-output gain g io 45 48 51 db automatic self-restart lock detection on time t on - 110 150 190 ms lock detection off time t off - 0.75 1.05 1.35 sec
FD177 version a.003 page 4 c???? silicon touch technology inc. fd17 7 application circuit output waveform hp hn o1 o2 truth table hall input o1 o2 hp > hn h l hp < hn l h
FD177 version a.003 page 5 c???? silicon touch technology inc. fd17 7 application notes ? the device is operated within wide s upply voltage range from 2.0 to 6.5 volts. the design, specifications and performance have been optimized for 5v brushless dc motor applications. ? the output driver node o1/o2 will be ?t urned to drive/sink? when v(hp) > v(hn). similarly, the output o1/o2 will be ?turned to sink/drive? when v(hp) < v(hn). ? there is no need of external timing capacitor for lock protection and auto-restart function. for 5v applic ation, the drivers will be shut down roughly 1 second after the motor is locked. when the drivers have been shut down, the automatic self-restart circuit will try to power up the drivers every 1 second until lock is released. ? there is no requirement of protecti on diode for power reverse fault in normal applications. the power polar ity reverse protection circuit is built-in. ? the connection of the capacito r 1uf between vdd and gnd and the capacitor 0.1uf between hall sensor hp and hn will increase the system stability when motor is rotating. ? the power dissipated by the ic varies widely with the supply voltage, the output current, and loading. it is impor tant to ensure the application does not exceed the allowable power di ssipation of the ic package. the recommended motor driver power dissipation versus temperature is depicted as follows: ? 0 100 200 300 400 500 600 0 25 50 75 100 125 150 tsot-28 ambient temperature ( c ) ?
? 3 ? 3 ? 3 3 3 3 ?
FD177 version a.003 page 6 c???? silicon touch technology inc. fd17 7 package specifications FD177 : tsot-28 variation(all dimensions shown in mm) symbol min. nom. max. a 0.750 - 0.800 a1 0 - 0.050 a2 0.700 0.750 0.775 b 0.220 - 0.380 c 0.100 - 0.200 d 2.800 2.900 3.000 e 2.600 2.800 3.000 e1 1.500 1.600 1.700 e 0.650 bsc e1 1.950 bsc l 0.370 0.450 0.600 l1 0.600 ref l2 0.250 bsc r 0.100 - - r1 0.100 - 0.250 0 o 4 o 8 o 1 4 o 10 o 12 o
FD177 version a.003 page 7 c???? silicon touch technology inc. fd17 7 the products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-vi sual equipment, communications devices and so on. hence, it is advisable t hat the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prev ention equipment and the like. misusing those products may directly or indire ctly endanger human life, or cause injury and property loss. silicon touch technology, inc. will not ta ke any responsibilities regarding the misusage of the products mentioned above. anyone who purchases any products described herein with the above -mentioned intentio n or with such misused applications should accept full responsibility and indemnify. silicon touch technology, inc. and its distributors and all their officers and employees shall defend jointly and severally agains t any and all claims and litigation and all damages, cost and expenses a ssociated with such intention and manipulation.
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