SNVU759 July 2021 TPS548B27
To change the frequency and operation mode of the part, the MODE pin is used. J4 and the surrounding circuitry allows for an easy change to the frequency and operation mode setting. Table 5-1 shows all 6 options offered by J4.
| Switching Frequency (FSW) | Operation Mode Under Light Load | Mode Pin Connections | ||
|---|---|---|---|---|
| Connection | Jumper Setting | |||
| 600 kHz | Skip Mode | Short to VCC | Short Pins 1 and 2 | |
| 800 kHz | Skip Mode | 243 kΩ ±10% to AGND | Short Pins 3 and 4 | |
| 1000 kHz | Skip Mode | 121 kΩ ±10% to AGND | Short Pins 5 and 6 | |
| 1000 kHz | Forced CCM | 60.4 kΩ ±10% to AGND | Short Pins 7 and 8 | |
| 800 kHz | Forced CCM | 30.1 kΩ ±10% to AGND | Short Pins 9 and 10 | |
| 600 kHz | Forced CCM | Short to AGND | Short Pins 11 and 12 | |