Document
UNISONIC TECHNOLOGIES CO., LTD
A2804
LINEAR INTEGRATED CIRCUIT
ZERO VOLTAGE SWITCH
DESCRIPTION
The UTC A2804 is a TRIAC controller providing a complete solution for temperature controlled electric panel heaters, cookers, film processing baths etc.
Switching occurs at the zero voltage point in order to minimize radio frequency interference. The device is suitable for mains-on-line operation and requires minimal components.
FEATURES
*Easy operation either through the AC line or a DC supply. *Supply voltage control. *Very few external components. *Symmetrical burst control-No DC current components in the load circuit *Negative output current pulse up to 250mA-short circuit protection. *Reference voltage output
■ ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
A2804L-D08-T
A2804G-D08-T
A2804L-S08-R
A2804G-S08-R
Package
DIP-8 SOP-8
DIP-8
SOP-8
Packing Tube
Tape Reel
MARKING
DIP-8
SOP-8
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A2804
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
Vs GND
Is 5
VOLTAGE LIMIT
7
VOLTAGE CONTROL
G1
HALF WAVE DETECTOR
AC
VSYN ISYN
INPUT RSYN
8
SYNCHRONOUS STAGE
G2
G3
G4
S MEMORY
VOUT
PULSE GENERATOR
LO 6
PULSE AMPLIFIER
Q
Q
G5
COMPA + RATOR -
4
NON-INV. INPUT
3
INV. INPUT
2
COM OUTPUT
REFERENCE VOLTAGE
REF. 1 VOLTAGE
OUTPUT
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R121-004.H
A2804
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified.)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
-Vs
8.2
V
Input Voltage
VIN
≤ IVSI
V
Supply Current Synchronous Current
-Is ISYN
40 (AVERAGE)
mA
5.0 (RMS)
mA
Power Dissipation Junction Temperature
PD
350
mW
TJ
+125
C
Operating Ambient Temperature Storage Temperature
TOPR
-20 ~ +70
C
TSTG
-65 ~ +150
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 (VS=8.0V, VSYN=100 ~ 115VRMS, TA=25C, f=50/60Hz)
PARAMETER Output Voltage Input Offset Voltage Supply Voltage 1 Supply Voltage 2 Common Mode Input Voltage Reference Voltage Circuit Current Synchronous Current Output Current Output Leakage Current Input Bias Current Output Leakage Current Output Pulse Width
SYMBOL VOUT VI(OFF) -VS1 -VS2 -VI(CM) -VR -IS ISYN IOUT ILO II(BIAS) ILC TPULSE
PIN NO. TEST CONDITIONS
6
IOUT≤150mA
3, 4
5
IS=2.5mA, RSYN=56K
5
IS=20mA, RSYN=56K
3, 4
1 IR≤1μA
5
RSYN=56K
8
6
ROUT≤25
6
3, 4
2
6
RSYN=56K
MIN TYP MAX UNIT
4.2 5.2 7.0 V
2.0 ±5.0 mV
6.5
8.4 V
7.8
8.8 V
0
5.7 V
3.6
V
1.0 2.0 4.0 mA
0.3
mA
150 180
mA
±2.0 μA
0.5 ±1.0 μA
±0.2 μA
100 200 300 μs
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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TYPICAL APPLICATIONS
ON-OFF TEMPERATURE CONTROL
100μF
NTC RH
VR RH: HYSTERESIS VOLTAGE SET
LINEAR INTEGRATED CIRCUIT
AC 100V/rms 50/60Hz
1
8
2
7
Ro 56
UTC A2804
3
6
4
5
Rs 6.8K
2W
Rsyn 56K
TIME PROPORTIONAL TEMPERATURE CONTROL
LOAD
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. UTC reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. This document supersedes and replaces all information supplied prior to the publication hereof.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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