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| UTC 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. 1 2 TO-92-2 TO-92-2: 1: Output 2: GND BLOCK DIAGRAM 1 2 PIN FUNCTION PIN 1 2 SYMBOL GND OUT FUNCTION GROUND OUTPUT (31~35V) ABSOLUTE MAXIMUM RATINGS (Tamb=25C) PARAMETER Stable Current Power Dissipation Operating Temperature Storage Temperature SYMBOL Iz PD Tamb TSTG MIN. MAX. 10 200 UNIT mA mW C C -20 -40 75 125 ELECTRICAL CHARACTERISTICS (Tamb=25C) PARAMETER Stable Voltage Dynamic Resister Stable Current And Temperature Characteristics SYMBOL Vz Rz Vz TEST CONDITIONS Iz=5mA Iz=5mA,IAC=0.5mA,f=1kHz Iz=5mA, Tamb= -20~75C MIN 31 TYP 33 10 MAX 35 25 1.0 UNIT V mV/C -1.0 UTC UNISONIC TECHNOLOGIES CO., LTD. 1 QW-R111-008,B UTC CW574 APPLICATION CIRCUIT 115V Vi Rs LINEAR INTEGRATED CIRCUIT A R2 R3 R10 TUNER CONTROL 2 33V 1 AGC Bu BV BL AFT VT +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. UTC UNISONIC TECHNOLOGIES CO., LTD. 2 QW-R111-008,B |
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