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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5.10 Short-Circuit Protection (SCP)
The output was shorted before the resonant converter was connected to the mains. A
short circuit across the output of the resonant converter increases primary current. The
SNSCUR pin detects the increase. When this voltage exceeds ±1.5 V, the safe-restart
protection is triggered. Approximately 4 ms after the HBC is started, the protection level
is reached. Removing the short across the output resets the protection.
(1) SUPIC
(2) HBC
(3) SNSCUR
Figure 17. Safe-restart protection during shorted output
Table 10
shows the input power when the output is shorted.
Table 10. Input power when output power is shorted
Condition
P
in
(W)
115 V; 60 Hz
1.75
230 V; 50 Hz
1.70
