33V COLOR TV VOLTAGE REGULATOR - Unisonic Technologies
Description
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
Halogen Free
CW574L-T90-B
CW574G-T90-B
CW574L-T90-K
CW574G-T90-K
CW574L-T90-R
CW574G-T90-R
Package
TO-92-2 TO-92-2 TO-92-2
Packing
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 Power Dissipation
IZ PD
10 mA 200 mW
Operating Temperature Storage Temperature
TOPR TSTG
-20 ~ +75 -40 ~ +125
°C °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
MIN TYP MAX UNIT
31 33 35
V
10 25 Ω
-1.
0 1.
0 mV/°C
UNISONIC TECHNOLOGIES CO.
, LTD
www.
unisonic.
com.
tw
2 of 3
QW-R111-008.
D
CW574
APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
115V Vi
Rs
2
A R2
TUNER CONTROL
R3 R10
33V 1
R11 R12
AGC Bu BV BL AFT VT +B
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 co...
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