JAJSVG8 October 2024 LM251772
PRODUCTION DATA
The feedback voltage divider is found with Equation 33:
For the 20V output, an upper resistor of 82.0kΩ and a lower resistor of 4.3kΩ have been selected.
FB Pin Resistor Divider Examples with RFB,top = 71.5kΩ shows an overview of a possible selection for the feedback divider resistors over common output voltages.
VO – Target | RFB,bot – Calculation | RFB,bot – E48 Series | VO Nominal | Error from FB Resistor |
---|---|---|---|---|
5V | 17.9kΩ | 17.8kΩ | 5.02V | 0.3% |
9V | 8.94kΩ | 9.09kΩ | 8.87V | -1.5% |
12V | 6.50kΩ | 6.59kΩ | 12.02V | 0.1% |
16V | 4.77kΩ | 4.87kΩ | 15.68V | -2.0% |
24V | 3.11kΩ | 3.16kΩ | 23.63V | –1.6% |
28V | 2.65kΩ | 2.61kΩ | 28.39V | 1.4% |
36V | 2.04kΩ | 2.05kΩ | 35.88V | –0.3% |
42V | 1.74kΩ | 1.78kΩ | 41.17V | -2.0% |
48V | 1.50kΩ | 1.54kΩ | 47.43V | –1.2% |