TEA19161T All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2016. All rights reserved.
Product data sheet Rev. 1 — 10 March 2016 27 of 46
NXP Semiconductors
TEA19161T
Digital controller for high-efficiency resonant power supply
When the measured value of R
SNSSET1
<10k, the system assumes a shorted pin to
ground and the start-up is inhibited. At a value of 46.4 K, the system can of continuously
delivering the maximum power of 200 %.
The output power level at which the overpower timer is started can be set to 125 % or
175 %. Two corresponding timer values can be selected, 50 ms or 200 ms. Finally, the
value of R
SNSSET1
(see Table 5) can set the behavior of the overpower function (either a
1 s restart or latched). During this protection period, the SUPIC is regulated at its
V
start(SUPIC)
level.
7.7.3 Low-power mode/burst mode transition levels
To ensure the best efficiency, the system must enter the low-power mode and the burst
mode at high power levels. However, to ensure the best output ripple, these modes must
be entered at low-power levels. To choose the optimum level for a specific application, the
power transition levels at which the system enters the low-power mode and the burst
mode can be set externally.
Resistor R
SNSSET2
defines the power levels at which the system enters the low-power
mode and the burst mode. Table 6
gives an overview.
Table 5. General settings
R
SNSSET1
(k) Power capability
level (%)
OPP timer level
(%)
End of power
good timer (ms)
OPP timer (ms) Protection
< 10 no start-up
46.4 200 infinite
53.6 200 175 190 200 1 s restart
61.9 200 175 45 50 1 s restart
71.5 150 125 190 200 1 s restart
82.5 150 125 45 50 1 s restart
95.3 200 175 190 200 latched
110 200 175 45 50 latched
127 150 125 190 200 latched
147 150 125 45 50 latched
