UC3843 DC-DC boost circuit calculation, if you want to boost 12V to 60V, how to calculate? The first picture has CX and the third...

QWE4562009

UC3843 DC-DC boost circuit calculation, if you want to boost 12V to 60V, how to calculate? The first picture has CX and the third... [Copy link]

UC3843 DC-DC boost circuit calculation, if you want to boost 12V to 60V, how to calculate? The first picture has CX and the third picture does not have CX (look carefully) What is the function of CX?

qwqwqw2088

This CX is a slope compensation capacitor, which is usually used together with a slope compensation transistor, but it is not necessary.

qwqwqw2088

Mainly when the duty cycle is greater than 50%, the circuit is slope compensated. It is useless when the duty cycle is small.

lkh747566933

This CX is a slope compensation capacitor, which is usually used together with a slope compensation transistor, but it is not necessary.

QWE4562009

Is the first picture wrong? What are CX R3 C5 used for? . . . The 4-pin goes through CX and R3 in parallel and then connects C5 in series to GND

led2015

CX may refer to the compensation capacitor in the circuit, which is used to stabilize the feedback control loop of the voltage loop.