SLUSEV2C June 2022 – March 2023 UCC28C50-Q1 , UCC28C51-Q1 , UCC28C52-Q1 , UCC28C53-Q1 , UCC28C54-Q1 , UCC28C55-Q1 , UCC28C56H-Q1 , UCC28C56L-Q1 , UCC28C57H-Q1 , UCC28C57L-Q1 , UCC28C58-Q1 , UCC28C59-Q1
PRODUCTION DATA
The internal oscillator uses a timing capacitor (C15) and a timing resistor (R12) to program the oscillator frequency. The operating frequency can be programmed based the curves in Figure 7-1, where the timing resistor is found once the timing capacitor is selected. It is best for the timing capacitor to have a flat temperature coefficient, typical of most COG or NPO type capacitors. For this converter, 40.2 kΩ and 1000 pF were selected for R12 and C15 to operate at 42.5-kHz switching.