unisonic technologies co., ltd UPC1237 preliminary linear integrated circuit www.unisonic.com.tw 1 of 5 copyright ? 2011 unisonic technologies co., ltd qw-r107-065.a protector ic for stereo power amplifier ? description utc UPC1237 is a semiconductor integrated circuit designed for protecting stereo power amplifiers and loudspeakers. ? features * wide supply voltage range of 25v~60v. * contain a relay driver. (max. i 6 =80ma) * work as either latching function or automatic resetting function by using pin 3. (in both over load detection and output offset detection, either function can be selected.) * single power supply. * built-in output offset detecti on function. both positive and negative output offset can be detected through pin2. * ac voltage can be detected. * time delay function. the time delay form amplifier power on to relay on can be freely set by selecting external components. * the moment that amplifier-power is turned off, it can make relay broken off and then loudspeaker disconnected for amplifier to prevent a shock off noise. ? ordering information ordering number package packing lead free halogen free UPC1237l-g08-t UPC1237g-g08-t sip-8 tube
UPC1237 preliminary linear integrated circuit unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r107-065.a ? pin configuration 1234567 8 ? pin description pin no. pin name description 1 pin1 input pin of overload detector 2 pin2 input pin of ou tput offset detector 3 pin3 input pin of switch for latch/automatic-reset 4 pin4 input pin of ac-off detector 5 pin5 gnd 6 pin6 output pin of relay driver 7 pin7 input pin of v cc on mute, setting delay time 8 pin8 v cc ? block diagram
UPC1237 preliminary linear integrated circuit unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r107-065.a ? absolute maximum rating (t a =25c) parameter symbol ratings unit power supply voltage v cc 60 v pin 4 maximum voltage v 4 ( ma x ) 10 v pin 7 maximum voltage v 7 ( ma x ) 8 v pin 8 maximum voltage v 8 ( ma x ) 8 v pin 1 maximum current i 1 ( ma x ) 3 ma pin 2 maximum current i 2 ( ma x ) 3 ma pin 6 maximum current i 6 ( ma x ) 80 ma power dissipation (t a =75c) p d 320 mw operational temperature t opr -20 ~ +75 c storage temperature t stg -40 ~ +125 c note: absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating condition parameter symbol ratings unit supply voltage v cc 25 ~ 60 v ? electrical characteristics (v cc =45v, t a =25c, using latching function) parameter symbol test conditions min typ max unit pin 1 threshold voltage v th 1 level to invert at pin 6 0.58 0.67 0.76 v pin 2 positive threshold voltage v th +2 level to invert at pin 6 0.54 0.62 0.70 v pin 2 negative threshold voltage v th -2 level to invert at pin 6 -0.12 -0.17 -0.23 v pin 4 threshold voltage v th 4 level to invert at pin 6 0.60 0.74 0.90 v pin 8 reference voltage v8 r l =1.5k ? 3.0 3.4 3.8 v
UPC1237 preliminary linear integrated circuit unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r107-065.a ? test circuit switch positions item sw 1 sw 2 sw3 v th 1 1 3 2 v th +2 2 1 2 v th -2 2 2 2 v th 4 2 3 1 v8 2 3 2 ? typical application circuit
UPC1237 preliminary linear integrated circuit unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r107-065.a 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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