TEA1716T
NXP Semiconductors
Resonant power supply control IC with PFC
Capacitive mode is detected when the HB slope does not start within tto(cmr) after the
MOSFETs have switched off. Detection of Capacitive mode increases the switching
frequency. Discharging the soft start capacitor with a relatively high current Icmr(hf)(SSHBC)
from the moment tto(cmr) has expired until the half-bridge slope has started realizes this
increase. The frequency increase regulates the HBC to the border between capacitive
and inductive mode.
7.9 Protection overview
Table 4.
Overview protections
Protected Symbol
Part
Protection
Affected Action
Description
IC
UVP-SUPIC
Undervoltage protection SUPIC
IC
disable
Section 7.2.1
Section 7.2.2
Section 7.3
IC
UVP-SUPREG Undervoltage protection SUPREG IC
disable
IC
UVP-supplies
SCP-SUPIC
OVP-output
FSP-output
OTP
Undervoltage protection supplies
Short circuit protection SUPIC
Overvoltage protection output
Failed start protection output
Overtemperature protection
Overcurrent regulation PFC
Undervoltage protection mains
Overvoltage protection boost
Short circuit protection boost
Open-loop protection PFC
IC
disable and reset
low HV start-up current
shut-down
IC
IC
Section 7.2.4
Section 7.5.4
IC
IC
IC
IC
restart after protection time Section 7.5.5
IC
IC
disable
Section 7.5.6
Section 7.7.7
Section 7.7.8
Section 7.7.9
Section 7.7.10
Section 7.7.10
Section 7.8.2
PFC
PFC
PFC
PFC
PFC
HBC
HBC
HBC
HBC
OCR-PFC
UVP-mains
OVP-boost
SCP-boost
OLP-PFC
UVP-boost
OLP-HBC
HFP-HBC
OCR-HBC
PFC
PFC
PFC
IC
switch off cycle-by-cycle
suspend switching
suspend switching
restart
IC
restart
Undervoltage protection boost
Open-loop protection HBC
High-frequency protection HBC
Overcurrent regulation HBC
HBC
IC
disable
restart after protection time Section 7.8.7
restart after protection time Section 7.8.9
IC
HBC
IC
increase frequency
restart after protection time
Section 7.8.10.2
HBC
OCP-HBC
Overcurrent protection HBC
HBC
step to maximum
frequency
Section 7.8.10.3
HBC
HBC
CMR
ANO
Capacitive mode regulation
Adaptive non-overlap
HBC
HBC
increase frequency
Section 7.8.11
Section 7.8.4
prevent hazardous
switching
TEA1716T
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© NXP B.V. 2012. All rights reserved.
Objective data sheet
Rev. 1 — 27 January 2012
31 of 46
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