unisonic technologies co., ltd f2970 preliminary linear integrated circuit www.unisonic.com.tw 1 of 6 copyright ? 2013 unisonic technologies co., ltd qw-r109-035.a for fan motor single-phase full-wave driver ? description the utc f2970 is a single-phase full-wave bipolar driver control ic with excellent efficiency for fan motor. ? features * single-phase full-wave drive (16v to 1.2a transistors are built in) * speed adjustment function by thermistor input and external signal incorporated enables silent and low-vibration variable speed control through direct pwm control wi th separately-excited upper t r * kick-back absorption circuit are built in * current limiter function (the limiter value determined with r f , limit at i o =480ma with r l =1 ? connection,) * low-consumption, low-loss, and low-noise drive enabled by the soft switching circuit during phase shift * hb incorporated * lock protection and automatic reset functions incorporated * fg (rotation detection) output * regeneration di incorporated with less external parts * thermal shutdown circuit incorporated sop-18 ? ordering information ordering number package packing lead free halogen free f2970l-s18-t f2970g-s18-t sop-18 tube F2970L-S18-R f2970g-s18-r sop-18 tape reel note: xx: output voltage, refer to marki ng information.
f2970 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r109-035.a ? pin configuration out2 vm v cc wh wl vth rmi p-in cpwm p-gnd out1 s-gnd 6vreg ct in- hb in+ fg 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 utc f2970 ? pin description pin no. pin name description 1 out2 output2 2 vm sense pin of current limiter 3 vcc power supply 4 wh osc input 5 wl osc output 6 vth variable speed function input 7 rmi lowest speed setting voltage 8 p-in dricte pwm speed control pin 9 cpwm pwm oscillator frenquency setting capacitor 10 fg speed detection output 11 in+ the hall sensor input 12 hb power the hall sensor 1.25v 13 in- the hall sensor input 14 ct setting lock protection time 15 6vreg v ref 6v 16 s-gnd control system gnd 17 out1 output1 18 p-gnd motor system gnd
f2970 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r109-035.a ? block diagram vm vcc 6vreg hb in+ in- fg s-gnd ct p-in rmi vth wh wl cpwm p-gnd out out overheat protection constant voltage 1.25v hysteresis amp charge/ discharge controller current control circuit rmi vth cpwm p-in - + + - h: rotation mode l: regeneration mode comparator delay circuit delay circuit oscillation
f2970 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r109-035.a ? absolute maximum rating (t a =25c) parameter symbol ratings unit maximum supply voltage v cc v cc 17 v maximum supply voltage vm vm 17 v out pin maximum output current i out 1.2 a out pin output withstand voltage v out 18 v maximum output current of hb ihb 10 ma vth, rmi input pin withstand voltage vth, rmi 7 v p-in input pin withstand voltage v p-in v cc v fg output pin output withstand voltage v fg 18 v fg output current i fg 10 ma allowable power dissipation specified substrate (note 1) p d 0.8 w operating temperature t opr -30~90 c storage temperature t stg -55~150 c notes: absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 1. specified substrate: 30mm30mm0.8mm, paper phenol. ? recommended operating ranges (t a =25c) parameter symbol ratings unit v cc supply voltage v cc 4.5~16 v vm supply voltage v m 3.5~16 v vth, rmi input level voltage range vth, rmi 0~6 v p-in input level voltage range v p-in 0~v cc v triangular wave input range vrm 0.5~4 v hall input common phase input voltage range v icm 0.2~3 v ? electrical characteristics (t a =25c, v cc =12v, r f =0 ? , unless otherwise specified.) parameter symbol test conditions min typ max unit circuit current i cc1 during drive 12 15 18 ma i cc2 during lock protection 11 14 17 ma hb voltage v hb i hb =5ma 1.12 1.22 1.32 v 6vreg voltage v 6vreg i 6vreg =5ma 5.85 5.95 6.10 v pin-ct h level voltage v cth 3.4 3.6 3.8 v pin-ct l level voltage v ctl 1.4 1.6 1.8 v pin-ct charge current i ct1 2.2 a pin-ct discharge current i ct2 0.22 a ct charge/discharge current ratio r ct 6.8 out output l saturation voltage v ol i o =200ma 0.1 0.2 v out output h saturation voltage v oh i o =200ma, r f =1 ? 0.6 0.8 v current limiter v rf 480 mv sensitivity of hall input v hn zero peak value (including offset and hysteresis) 10 20 mv fg output pin l voltage v fg i fg =5ma 0.2 0.3 v fg output pin leak current i fgl v fg =7v 30 a overheat protection thd design guarantee value (note 1) 180 c note: 1. design target value and no measurement was made.
f2970 preliminary linear integrated circuit unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r109-035.a ? truth table vth pin in- in+ ct out1 out2 fg mode l (open) l h l l h l l running-drive l l h l h off h l h l off l l running-regeneration l l h l off off - h h l l off l l output regeneration mode with external signal - h l h l off off - - h l h off l l lock protection - - l h h l off off notes: 1.vth, p-in=l means vth, p-incpwm
f2970 preliminary linear integrated circuit unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r109-035.a ? typical application circuit *4 rf v cc hb in- in+ 6vreg pin wh wl rmi vth cpwm ct sgnd vm fg out1 out2 pgnd cm *2 *7 *8 *5 hall r6 r4 *3-3 r5 pwm-in rtu *3 th *3-1 r1 r2 r7 r8 r3 *6 cp=100pf *f=25khz c=2200~4700pf r=20~50 *3-2 r1 r2 *1 wh wl r3 v cc utc f2970 ct=0.47~1f 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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