AN10907
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© NXP B.V. 2010. All rights reserved.
Application note
Rev. 1 — 28 December 2010
63 of 82
NXP Semiconductors
AN10907
TEA1613T resonant power supply control IC
10.3.3.4
Both OVP and UVP disabled
When neither OVP or UVP functionality is required, a fixed voltage between 2.35 V and
3.5 V can be applied to SNSOUT. This can be obtained from a resistor divider that is
referenced to the SUPREG.
10.3.3.5
UVP during burst mode operation
When the system is in burst mode operation, the undervoltage protection is not active
while switching is off. This is to prevent incorrect protection during this interval. As soon as
switching is resumed, the UVP protection becomes active again.
Fig 47. Example of disabling the OVP function of SNSOUT/PFCON
001aal470
100
μ
A
1.5 V
SNSOUT/PFCON
SUPREG = 10.9 V
8.2 k
Ω
2.7 k
Ω
1N4148
(1)
(2)
V
aux
TEA1613
OVP
latched shutdown
3.5 V
COMP
UVP
protection timer
2.35 V
COMP
Fig 48. Example of disabling both the UVP and the OVP functions of SNSOUT/PFCON
001aal471
100
μ
A
1.5 V
SNSOUT/PFCON
SUPREG = 10.9 V
91 k
Ω
33 k
Ω
OVP
latched shutdown
3.5 V
COMP
UVP
protection timer
2.35 V
COMP
TEA1613
