KA3843 ESTEK [Estek Electronics Co. Ltd], KA3843 Datasheet
KA3843
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KA3843 Summary of contents
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Description The 3842A(AM)/43A(AM)/44A(AM)/45A(AM) are fixed frequency current mode PWM controller. They are specially designed for OFF−Line and converter applications with a minimal external components. Internally implemented circuits include a trimmed oscillator for precise duty cycle control, a ...
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Electrical characteristics (*V =15V, R =10kΩ, C =3.3nF Characteristics Symbol Reference Section Reference Output Voltage V REF ∆V Line Regulation ∆V Load Regulation Short Circuit Output Current I SC Oscillator Section f Oscillation Frequency ...
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Pin functions N Function 1 COMP This pin is the Error Amplifier output and is made for loop compensation This is the inverting input of the Error Amplifier normall y connected to the switching power supply ...
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V REF SLOPE SENSE R S SCR must be selected for a holding current of less than 0.5mA. The simple two transistor circuit can be used in place of ...
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Figure 7. External Clock Synchronization Figure 8. Soft-Start Circuit 5 BEIJING ESTEK ELECTRONICS CO.,LTD ...
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Typical Performance Characteristics Ω 50 5nF 10nF 100 200 500 Figure 1. Timing Resistor vs. Oscillator Dm ...
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V sat (V) Sourse Saturation (Load to Ground µ Pulsed Load 120Hz R ate 3 2 Sink Sa tura tion 1 ( 200 400 Figure . 7 Output ...