NXP Semiconductors
UM10972
TEA1916DB1262 digital resonant 240 W/12 V power supply demo board
UM10972
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User manual
Rev. 1.1 — 8 June 2018
COMPANY PUBLIC
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Finally, when the output power level is further reduced, the PFC converter enters burst
mode.
The power supply consumes more power without low-power mode and burst mode.
a. PFC continues switching until regulation level is reached,
swaps after that to normal mode when P
out
is low. The
measurement example shows the result at Pout = 13.8 W.
b. FC continues switching until regulation level is reached,
then swaps to burst mode when P
out
is very low. The
measurement example shows the result at P
out
= 6.6 W.
(1) PFC
(2) HBC
(3) V
out
Figure 9. HBC burst mode operation after initial start-up
a. The “wait” time increases at lower output power when
the HBC operates in low-power mode. The measurement
example shows the result at P
out
= 22.5 W.
b. The “wait” time decreases at higher output power when
the HBC operates in low-power mode. The measurement
example shows the result at P
out
= 39.7 W.
(1) PFC
(2) HBC
(3) V
out
(4) I
out
Figure 10. HBC low-power mode operation
