unisonic technologies co., ltd f1962 preliminary linear integrated circuit www.unisonic.com.tw 1 of 9 copyright ? 2010 unisonic technologies co., ltd qw-r109-017,ba single-phase full-wave motor driver ic ? description the utc f1962 is a single-phase full-wave motor driver designed specially for small dc fans. for example, cpu cooling fans. ? features * wide operating voltage 5v or 12v are both acceptable * built-in hall amplifier and hall bias circuit * built-in lockup and thermal protection with automatic recovery circuits * rotation detection output * start/stop pin for standby mode control msop-10 ? ordering information ordering number package packing F1962G-SM2-R msop-10 tape reel
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 9 www.unisonic.com.tw qw-r109-017,ba ? pin configuration fg 10 9 8 7 1 2 3 4 out1 in - in + ct hb st v cc 6 gnd out2 5
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 9 www.unisonic.com.tw qw-r109-017,ba ? block diagram
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 9 www.unisonic.com.tw qw-r109-017,ba ? absolute maximum rating (ta=25 ) parameter symbol ratings unit maximum supply voltage v cc (max) 17 v maximum output current i out (max) 0.5 a maximum output withstand voltage v out (max) 15 v maximum output withstand voltage v f (max) 17 v i f (max) 5 ma maximum output current i r (max) 5 ma hb maximum output current i b (max) 10 ma st maximum input voltage v st (max) 15 v allowable power dissipation (with specified substrate( note 2)) p d 850 mw operating temperature t opr -30 ~ +85 storage temperature t stg -40 ~ +150 note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. specified substr ate: 114.376.21.5mm 3 glass epoxy. 3. the device is guaranteed to meet performance specification within 0 ~70 operating temperature range and assured by design from ?20 ~85 . ? recommanded operating ratings (ta=25 ) parameter symbol ratings unit power supply voltage v cc 3.8 ~ 16.8 v st input high level voltage st h 3 ~ 14 v st input low level voltage st l -0.3 ~ +0.4 v hall input common mode voltage range v icm 0.2 ~ vcc-1.5 v ? electrical characteristics (ta=25 , v cc =5v) parameter symbol test conditions min typ max unit in drive mode (ct=[l], st=[l]) 6.5 9.1 ma in lockup protection mode (ct=[h], st=[l]) 2.2 3.1 ma current drain i cc in standby mode (st=[h]) 110 150 a lockup detection capacitor charge current i ct 1 1.9 2.8 3.7 a capacitor discharge current i ct 2 0.32 0.46 0.60 a capacitor charge/discharge current ratio r ct r cd =i ct 1 /i ct 2 5.0 6.0 7.0 ct charge voltage v ct 1 2.55 2.75 2.95 v ct discharge voltage v ct 2 1.6 1.8 2.0 v output low level voltage v ol i o =200ma 0.2 0.3 v output high level voltage v oh i o =200ma 3.9 4.1 v hall input sensitivity v hn zero peak value (including offset and hysteresis) 7 15 mv output pin low voltage v fg i rd , i fg =5ma 0.1 0.3 v output pin leakage current i fgl v rd , v fg =15v 30 a hb output low voltage v hbl i hb =5ma 1.0 1.3 v st pin input current i st v st =5v 75 100 a
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 5 of 9 www.unisonic.com.tw qw-r109-017,ba ? truth table st in - in + ct out1 out2 fg hb mode h off off off off standby h l h l h l h l l h l l rotating l h off off l lockup protection activated ? design reference (1) v cc pin power supply pin for whole i c . (2) out1, out2 pins single-phase coil output pins. bipolar forward or reverse drive output determined by ou t1 or out2 high. built-in regenerative circuit that regenerates kickback current between lower side npn outputs if a diode is used for protection against reverse connection. (3) in ? , in + pins hall signal input pins the hall signal is amplified into a square wave by the ha ll amplifier with hysteresis characteristics of 3.5 mv (typ.). the hall signal amplitude should be 70 mv or more. (4) ct pin this pin serves timing capacitor connecting pin between ct and gnd. the capacitor determines timing of the built-in lockup protection circuit for pr eventing coil burnout when motor is locked. once normal motor rotating condition is restored, the automatic recovery circ uit will reset itself. adjusting the capacitance alters the lockup detection time. when a 0.47 mf capacitor is connected between ct and gnd lockup detection time :approx. 0.5s lockup protection time/automatic recovery time :approx. 0.16s (output on) :approx. 1s (output off) connecting this pin to ground when lockup function is not used (6) fg pin open-collector output pin for rotation frequency detection. when in ? = high and in + = low, then fg = low when in ? = low and in + = high, then fg = high (7) st pin and hb pin st pin: when input to this pin is high, mo tor drive is stopped (out is high impedance). hb pin: hall bias switching pin. at st pin high input, hall bias is switched to reduce current drain in fan standby mode. if not used, both pins should be open. (8) thermal protection circuit when junction temperature t j of ic is or over about 150 , output current limiter is activated to protect against damage.
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 6 of 9 www.unisonic.com.tw qw-r109-017,ba ? sample application circuit startup
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 7 of 9 www.unisonic.com.tw qw-r109-017,ba ? sample application circuit(cont.) locked-up protection and automatic recovery curves locked output on released out fg ct start or stop curve
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 8 of 9 www.unisonic.com.tw qw-r109-017,ba ? typical characteristics allowable power dissipation, pdmax (mw) current drain, icc (ma) lower ride output saturation voltage, v out(sat) l (v) input current, i in (a) upper side output saturation voltage, v out(sat) h (v) v rd , v hb (v)
f1962 preliminary linear integrated circuit unisonic technologies co., ltd 9 of 9 www.unisonic.com.tw qw-r109-017,ba utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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