AN10907
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© NXP B.V. 2010. All rights reserved.
Application note
Rev. 1 — 28 December 2010
12 of 82
NXP Semiconductors
AN10907
TEA1613T resonant power supply control IC
6. Supply
functions
6.1 Basic supply system overview
6.1.1 TEA1613T supplies
The main supply for the TEA1613T is SUPIC.
SUPHV can be used to charge SUPIC for starting the supply. During operation a supply
voltage is applied to SUPIC and the SUPHV source is switched off. The SUPHV source is
only switched on again at a new start-up.
The internal regulator SUPREG generates a fixed voltage of 10.9 V to supply the internal
MOSFET drivers GATELS and GATEHS. To supply GATEHS a bootstrap function with an
external diode is used to make supply SUPHS.
SUPIC and SUPREG also supply other internal TEA1613T circuits.
6.1.2 Supply monitoring and protection
The supply voltages are internally monitored for deciding when to initiate certain actions
i.e. starting, stopping or protection.
In several applications the SUPIC voltage can also be used to monitor the HBC output
voltage by protection input SNSOUT/PFCON.
Fig 4.
Basic overview internal IC supplies
001aal429
TEA1613
SUPHV
22 V
start when HVsupply
enable HVsource
start when LVsupply
stop, UVP
shutdown reset
COMP
0.65 V
COMP
17 V
COMP
7 V
COMP
15 V
COMP
start
EXTERNAL
stop
10.7 V
10.9 V
COMP
GATEHS
SUPHS
HB
SUPREG
SUPIC
HBC
V
AUXILIARY
SNSOUT/PFCON
GATELS
10.3 V
COMP
OVP
latched
shutdown
UVP
protection
timer
3.5 V
COMP
2.35 V
COMP
1.1 mA
5.1 mA
HV
STARTUP
CONTROL
V
BOOST
