JAJSHH5 May 2019 TAS5806MD
PRODUCTION DATA.
This device supports spread spectrum with triangle mode, Spread spectrum is used to minimize the EMI noise.
User need configure register SS_CTRL0 (0x6B) to Enable triangle mode and enable spread spectrum, and select spread spectrum frequency and range with SS_CTRL1 (0x6C). For 384kHz FSW which configured by DEVICE_CTRL1 (0x02), the spread spectrum frequency and range are described in Table 3.
SS_TRI_CTR L[3:0] | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
---|---|---|---|---|---|---|---|---|
Triangle Freq | 24k | 48k | ||||||
Spread Spectrum Range | 5% | 10% | 20% | 25% | 5% | 10% | 20% | 25% |
User Application example-Central Switching Frequency is 384kHz, Triangle Frequency is 24kHz, take I2C device address 0x58 as an example:
w 58 6b 03 //Enable Spread Spectrum.
w 58 6c 03 //SS_TRI_CTRL[3:0]0011, Triangle Frequency = 24kHz, Spread Spectrum Range should be 25% (336kHz~432kHz).