UC3842D1

Operating Supply Voltage :
Operating Supply Current :
Number of Outputs : 1
Mounting Style : SMD/SMT
Fall Time : 35 ns
Switching Frequency : 500 KHz
Duty Cycle (Max) : 100 %
Maximum Operating Temperature : + 70 C
Rise Time : 45 ns
Package / Case : SOP-8


Description

The UC3842D1 is fixed frequencycurrent-mode PWM controller.It is specially designed for Off-Line and DC to DC  converter applications with minimum external components.These integrated circuits  feature a  trimmed oscillator for precise duty cycle control, a temperature  compensated reference, high gain error amplifier, current sensing comparator and a high current totempole output for driving a Power MOSFET.

Features of the UC3842D1 are:(1)Low Start up Current;(2)Maximum Duty Clamp;(3)UVLO With Hysteresis;(4)Operating Frequency up to 500KHz.

The absolute maximum ratings of the UC3842D1 can be summarized as:(1)Supply Voltage,VCC:30V;(2)Output Current,IO:±1A;(3)Analog Inputs (Pin 2.3),V(ANA):-0.3V to 6.3V;(4)Error Amp Output Sink Current,ISINK (E.A):10mA;(5)Power Dissipation at TA25 (8DIP),PD(Note1,2):1200mW;(6)Power Dissipation at TA25 (8SOP),PD(Note1,2):460mW;(7)Power Dissipation at TA25 (14SOP),PD(Note1,2):680mW;(8)Storage Temperature Range,TSTG:-65 to +150;(9)Lead Temperature (Soldering, 10sec),Tlead:+300.Note:1. Board Thickness 1.6mm, Board Dimension 76.2mm*114.3mm, (Reference EIA / JSED51-3, 51-7).2. Do not exceeed PD and SOA (Safe Operation Area)

If you want to know more information such as the electrical characteristics about the UC3842D1, please download the datasheet in www.seekic.com or www.chinaicmart.com .