JAJSNJ1H May 2013 – December 2021 TPS65310A-Q1
PRODUCTION DATA
The TPS65310A-Q1 features a frequency-hopping pseudo-random spectrum or triangular spreading architecture. The pseudo-random implementation uses a linear feedback shift register that changes the frequency of the internal oscillator based on a digital code. The shift register is designed in such a way that the frequency shifts only by one step at each cycle to avoid large jumps in the buck and BOOST switching frequencies. The triangular function uses an up-down counter. Whenever spread spectrum is enabled (SPI command), the internal oscillator frequency is varied from one BUCK1 cycle to the next within a band of 0.8 x fOSC ... fOSC from a total of 16 different frequencies. This means that BUCK3 and BOOST also step through 16 frequencies. The internal oscillator can also change its frequency during the period of BUCK2, yielding a total of 31 frequencies for BUCK2.