ZHCSNR7A March 2022 – August 2022 TPS55289
PRODUCTION DATA
In light load condition, the TPS55289 can work in PFM or forced PWM mode to meet different application requirements. PFM mode decreases switching frequency to reduce the switching loss, thus it gets high efficiency at light load condition. FPWM mode keeps the switching frequency unchanged to avoid undesired low switching frequency, but the efficiency becomes lower than that of PFM mode.
By default, the TPS55289 works in PFM mode. To set the device in forced PWM mode, write the FPWM bit in the MODE register to 1.