UC3842A/3843A LINEAR INTEGRATED CIRCUIT
UNISONIC TECHNOLOGIES CO., LTD 3 of 9
www.unisonic.com.tw QW-R103-002.E
ABSOLUTE MAXIMUM RATINGS (Ta=25℃)
PARAMETER SYMBOL RATINGS UNIT
Supply Voltage(Low Impedance Source) VCC 30 V
Supply Voltage(ICC<30mA) VCC Self Limiting V
Output Current ( Peak ) IO(PEAK) ±1 A
Output Energy (capacity Load ) 5 μJ
Analog Inputs(pin 2,3) VI(ANA) -0.3 ~ +6.3 V
Error Amplifier Output Sink Current ISINK(EA) 10 mA
DIP-8 1.0 W
Power Dissipation( Ta≦25°C) SOP-8 PD 0.5 W
Derated at Ta>25°C PD 8 mW/°C
Junction Temperature TJ +150 °C
Storage Temperature TSTG -65 ~ +150 °C
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°C≦Ta≦70°C, VCC=15V, RT=10kΩ, CT=3.3nF, unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Reference Section
Output Voltage VREF T
J=25°C,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/°C
Total Output Variation Line, Load, Temp(Note 1) 4.82 5.18 V
Output Noise Voltage Vosc 10Hz≦f≦10kHz,TJ=25°C (Note 1) 50 μV
Long Term Stability Ta=25°C,1000Hrs(Note 1) 5 25 mV
Output Short Circuit ISC -30 -100 -180 mA
Oscillator Section
Initial Accuracy f TJ=25°C 47 52 57 kHz
Voltage Stability Δf/ΔVcc 12≦VCC≦25V 0.2 1 %
Temperature Stability Tmin≦Ta≦Tmax(Note 1) 5 %
Amplitude Vosc Vpin 4 peak to peak 1.7 V
Error Amplifier Section
Input Voltage VI(EA) Vpin 1=2.5V 2.42 2.50 2.58 V
Input Bias Current II(BIAS) -0.3 -2 μA
AVOL
2 ≦VOUT≦4V 60 90 dB
Unity Gain Bandwidth TJ=25°C (Note 1) 0.7 1 MHz
PSRR
I2≦VCC≦25V 60 70 dB
Output Sink Current IO(SINK) Vpin 2=2.7V,Vpin 1=1.1V 2 6 mA
Output Source Current IO(SOURCE) Vpin 2=2.3V,Vpin 1=5V -0.5 -0.8 mA
VOUT High VOH Vpin 2=2.3V, RL=15kΩ to GND 5 6 V
VOUT Low VOL Vpin 2=2.7V,Vpin 1=1.1V 0.7 1.1 V