UC3842A/3843A LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 3 of 9
www.unisonic.com.tw QW-R103-002.G
ABSOLUTE MAXIMUM RATINGS (TA=25℃, unless otherwise specified)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage(Low Impedance Source) VCC 30 V
Supply Voltage(ICC<30mA) VCC Self Limiting V
Analog Inputs (Pin 2,3) VI
ANA
-0.3 ~ +6.3 V
Output Current (Peak ) IO
PEAK
±1 A
Error Amplifier Output Sink Current ISINK
EA
10 mA
Output Energy (Capacity Load) 5 μJ
Power Dissipation( TA≦25℃) DIP-8
PD
1250 mW
SOP-8 800
Derated at TA>25℃ 8 mW/℃
Junction Temperature TJ +150
℃
Storage Temperature TSTG -65 ~ +150 ℃
Note Absolute maximum ratings are those values beyond which the device which the device could be permanently
damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.
ELECTRICAL CHARACTERISTICS
(0℃≦TA≦70℃, VCC=15V, RT=10kΩ, CT=3.3nF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
REFERENCE SECTION
Output Voltage VREF TJ=25℃,IOUT=1mA 4.9 5 5.1 V
Line Regulation ΔVREF 12≦VIN25V 6 20 mV
Load Regulation ΔVREF 1≦IOUT=20mA 6 25 mV
Temperature Stability (Note 1) 0.2 0.4 mV/℃
Total Output Variation Line, Load, Temp (Note 1) 4.82 5.18 V
Output Noise Voltage VOSC 10Hz≦f≦10kHz,TJ=25℃ (Note 1) 50 μV
Long Term Stability TA=25℃,1000Hrs (Note 1) 5 25 mV
Output Short Circuit ISC -30 -100 -180 mA
OSCILLATOR SECTION
Initial Accuracy f TJ=25℃ 47 52 57 kHz
Voltage Stability Δf/ΔVCC 12≦VCC≦25V 0.2 1 %
Temperature Stability TMIN≦TA≦TMAX (Note 1) 5 %
Amplitude VOSC V
PIN4 peak to peak 1.7 V
ERROR AMPLIFIER SECTION
Input Voltage VI
EA
V
PIN1=2.5V 2.42 2.50 2.58 V
Input Bias Current II
BIAS
-0.3 -2 μA
AVOL
2V ≦VOUT≦4V 60 90 dB
Unity Gain Bandwidth TJ=25℃ (Note 1) 0.7 1 MHz
PSRR
I2≦VCC≦25V 60 70 dB
Output Sink Current IO
SINK
V
PIN2=2.7V,VPIN1=1.1V 2 6 mA
Output Source Current IO
SOURCE
VPIN2=2.3V,VPIN1=5V -0.5 -0.8 mA
VOUT High VOH V
PIN2=2.3V, RL=15kΩ to GND 5 6 V
VOUT Low VOL V
PIN2=2.7V,VPIN1=1.1V 0.7 1.1 V