Uc3843 Application Circuit Diagram. This application note provides a functional description of the uc3842 family and highlights the features of each in dividual member the uc3842 uc3843 uc3844 and uc3845 throughout the text the uc3842 part number will be referenced however the generalized circuits and performance characteristics apply to each member of the. Open loop test circuit high peak currents associated with capacitive loads necessitate careful grounding techniques timing and bypass capacitors should be connected close to pin 5 in a single point ground.
Figure 5a shows that the uvlo turn on and. Output short circuit current isc 30 85 180 30 85 180 ma oscillator section frequency tj 25 c ta tlow to thigh fosc 47 46 52 57 60 47 46 52 57 60 khz frequency change with voltage vcc 12 v to 25 v fosc v 0 2 1 0 0 2 1 0 frequency change with temperature ta tlow to thigh fosc t 5 0. Open loop test circuit high peak currents associated with capacitive loads necessitate careful grounding techniques timing and bypass capacitors should be connected close to pin 5 in a single point ground.
So if you are looking for an ic to produce pwm signals for controlling a power switch based on the current flowing through the circuit then this ic might be the right choice for you.
More information uc3843 application circuit diagram. More information uc3843 application circuit diagram. Output short circuit current isc 30 85 180 30 85 180 ma oscillator section frequency tj 25 c ta tlow to thigh fosc 47 46 52 57 60 47 46 52 57 60 khz frequency change with voltage vcc 12 v to 25 v fosc v 0 2 1 0 0 2 1 0 frequency change with temperature ta tlow to thigh fosc t 5 0. Ti s uc3843 is a single ended 500khz current mode pwm controller with 8 4v 7 6v uvlo 100 duty cycle 0c to 70c.
