UNISONIC TECHNOLOGIES CO., LTD CW574 LINEAR INTEGRATED CIRCUIT 33V COLOR TV VOLTAGE REGULATOR DESCRIPTION The UTC CW574 is a parallel voltage regulator which provides stable harmonious voltage for high frequency tuner head of color TV. FEATURES * Low temperature coefficient * Low dynamic resister * Typical voltage: 33V ORDERING INFORMATION Ordering Number Lead Free CW574L-T90-B CW574L-T90-K CW574L-T90-R Halogen Free CW574G-T90-B CW574G-T90-K CW574G-T90-R Package Packing TO-92-2 TO-92-2 TO-92-2 Tape Box Bulk Tape Reel BLOCK DIAGRAM 1 2 www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 3 QW-R111-008.D CW574 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (TA=25°C) PARAMETER SYMBOL RATINGS UNIT Stable Current IZ 10 mA Power Dissipation PD 200 mW Operating Temperature TOPR -20 ~ +75 °C Storage Temperature TSTG -40 ~ +125 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS (TA=25°C) PARAMETER Stable Voltage Dynamic Resister Stable Current and Temperature Characteristics SYMBOL TEST CONDITIONS VZ IZ=5mA RZ IZ=5mA,IAC=0.5mA,f=1kHz ΔVZ IZ=5mA, TA= -20~75°C UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 31 -1.0 TYP 33 10 MAX 35 25 UNIT V Ω 1.0 mV/°C 2 of 3 QW-R111-008.D CW574 LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT 115V Rs TUNER CONTROL A Vi R2 R3 2 R10 AGC Bu BV BL AFT VT 33V 1 +B R11 R12 IE The UTC CW574 is a parallel voltage regulator which provides stable harmonious voltage for high frequency tuner head of color TV. The main power 115V goes through Rs resister to position 2 of UTC CW574 then the position A with 33V provides stable voltage for control circuit of high frequency tuner. The circuit from R3 to R10 is potential meter for tuning, according to different channels to change contact positions; to provide corresponding voltage to tuner; and to control the capacity of varicap diode in order to have high frequency tuner into proper channel. The voltage range of UTC CW574 is required to cover necessary frequency range, and main issue of UTC CW574 is its reliable voltage stability which avoids unexpected frequency offset; therefore, the circuit of UTC CW574 contains temperature compensation to have lowermost temperature coefficient. 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 3 QW-R111-008.D