NXP Semiconductors AN10881 Installation and operating instructions

AN10881
TEA1713 resonant power supply control IC with PFC
Rev. 2 — 26 September 2011 Application note
Document information
Info Content
Keywords TEA1713, adapter, LCD TV, Plasma TV, resonant, converter, PFC,
Burst mode
Abstract The TEA1713 integrates a controller for Power Factor Correction (PFC)
and a controller for a half-bridge resonant converter (HBC).
It provides the drive function for the discrete MOSFET for the up-converter
and for the two discrete power MOSFETs in a resonant half-bridge
configuration.
The resonant controller part is a high-voltage controller for a zero voltage
switching LLC resonant converter. The resonant controller part of the IC
includes a high-voltage level shift circuit and several protection features
such as overcurrent protection, open-loop protection, Capacitive mode
protection and a general purpose latched protection input.
In addition to the resonant controller, the TEA1713 also contains a Power
Factor Correction (PFC) controller. The efficient operation of the PFC is
obtained by functions such as quasi-resonant operation at high power
levels and quasi-resonant operation with valley skipping at lower power
levels. Overcurrent protection, overvoltage protection and
demagnetization sensing, ensures safe operation in all conditions.
The proprietary high-voltage BCD Powerlogic process makes direct
start-up possible from the rectified universal mains voltage in an efficient
way. A second low voltage Silicon-On-Insulator (SOI) IC is used for
accurate, high speed protection functions and control.
The combination of PFC and a resonant controller in one IC makes the
TEA1713 suitable for power supplies in LCD TV, plasma televisions, PC
power supplies, high-power office equipment and adapters.
This application note discusses the TEA1713 functions for applications.

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Application note Rev. 2 — 26 September 2011 2 of 102
Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
Table 1. Revision history
Rev Date Description
02 20110926 Second, updated release
01 20100322 First release

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Application note Rev. 2 — 26 September 2011 3 of 102
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TEA1713 resonant power supply control IC with PFC
1. Introduction
1.1 Scope and setup
This application note discusses the TEA1713 functions for applications in general.
Because the TEA1713 provides extensive functionality, many subjects are discussed.
This document is set up in such a way, that a chapter or paragraph of a selected subject
can be read as a standalone explanation with a minimum of cross-references to other
document parts or the data sheet. This leads to some repetition of information within the
application note and to descriptions or figures that are similar to those published in the
TEA1713 data sheet. In most cases typical values are given to enhance the readability.
•Section 1 “Introduction”
•Section 2 “TEA1713 highlights and features”
•Section 3 “Pin overview with functional description”
An overview of the TEA1713 pins with a summary of the functionality.
•Section 4 “Application diagram and block diagrams”
•Section 5 “Supply functions”
Sections 6, 7, 8, 9, and 10 describe the main functions of the TEA1713, providing an
in-depth explanation of the issues relating to the subject. The functions are written
from an application point of view.
•Section 6 “MOSFET drivers GATEPFC, GATELS and GATEHS”
•Section 7 “PFC functions”
•Section 8 “HBC functions”
•Section 9 “Burst mode operation”
•Section 10 “Protection functions”
An overview of the protection functions of the TEA1713 with an extended explanation
and related issues on the subject. These functions are described and seen from an
applications point of view.
•Section 11 “Miscellaneous advice and tips”
A collection of subjects related to PCB design and debugging are discussed, including
proposals for the way of working.
•Section 12 “Application examples and topologies”
This section contains examples of applications (circuit diagrams) and possible
topologies.
•Section 13 “Differences between TEA1713T and TEA1713LT”
An overview of the differences between the TEA1713T and the TEA1713LT.
Remark: All values provided throughout this document are typical values unless
otherwise stated.

AN10881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Application note Rev. 2 — 26 September 2011 4 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
1.2 Related documents
Additional information and tools can be found in other TEA1713 documents such as:
•Data sheet
•User manual of demo board
•Calculation sheet

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Application note Rev. 2 — 26 September 2011 5 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
2. TEA1713 highlights and features
2.1 Resonant conversion
Today’s market demands high-quality, reliable, small, lightweight and efficient power
supplies.
In principle, the higher the operating frequency, the smaller and lighter the transformers,
filter inductors and capacitors can be. On the other hand, the core, switching and winding
losses of the transformer increase at higher frequencies and become dominant. This
effect reduces the efficiency at a high frequency, which limits the minimum size of the
transformer.
The corner frequency of the output filter usually determines the bandwidth of the control
loop. A well-chosen corner frequency allows high operating frequencies to achieve a fast
dynamic response.
Pulse Width Modulated (PWM) power converters, such as flyback, up and down
converters, are widely used in low and medium power applications. A disadvantage of
these converters is that the PWM rectangular voltage and current waveforms cause
turn-on and turn-off losses that limit the operating frequency. The rectangular waveforms
also generate broadband electromagnetic energy that can produce ElectroMagnetic
Interference (EMI).
A resonant DC-to-DC converter produces sinusoidal waveforms and reduces the
switching losses, which provide the possibility of operation at higher frequencies.
Recent environmental considerations have resulted in a need for high efficiency
performance at low loads. Burst mode operation of the resonant converter can provide
this if the converter is required to remain active as is the case for adapter applications.
Why resonant conversion?
•High power
•High efficiency
•EMI friendly
•Compact
2.2 Power factor correction conversion
Most switch mode power supplies result in a non-linear impedance (load characteristic) to
the mains input. Current taken from the mains supply occurs only at the highest voltage
peaks and is stored in a large capacitor. The energy is taken from this capacitor storage,
in accordance with the switch mode power supply operation characteristics.
Government regulations dictate special requirements for the load characteristics of certain
applications. Two main requirements can be distinguished:
•Mains harmonics requirements EN61000-3-2
•Power factor (real power/apparent power)
The requirements work towards a more resistive characteristic of the mains load.

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Application note Rev. 2 — 26 September 2011 6 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
Measures are required regarding the input circuit of the power supply to fulfill these
requirements. Passive (often a series coil) or active (often a boost converter) circuits can
be used to modify the mains load characteristics accordingly.
An additional market requirement for the added mains input circuit is that it works with a
good efficiency and have a low cost.
Using a boost converter to meet these requirements provides the benefit of a fixed DC
input voltage when combined with a resonant converter. The fixed input voltage provides
easier design of the resonant converter (specially for wide mains input voltage range
applications) and the possibility to reach a higher efficiency.
2.3 TEA1713 resonant power supply control IC with PFC
The TEA1713 integrates two controllers, one for Power Factor Correction (PFC) and one
for a half-bridge resonant converter (HBC). It provides the drive function for the discrete
MOSFET for the up-converter and for the two discrete power MOSFETs in a resonant
half-bridge configuration.
The resonant controller part is a high-voltage controller for a zero voltage switching LLC
resonant converter.
The resonant controller part of the IC includes a high-voltage level shift circuit and several
protection features such as overcurrent protection, open-loop protection, Capacitive mode
protection and a general purpose latched protection input.
In addition to the resonant controller, the TEA1713 also contains a Power Factor
Correction (PFC) controller. The efficient operation of the PFC is obtained by functions
such as quasi-resonant operation at high power levels and quasi-resonant operation with
valley skipping at lower power levels. Overcurrent protection, overvoltage protection and
demagnetization sensing ensures safe operation in all conditions.
The proprietaryhigh-voltage BCD Powerlogic process makes direct start-up possible from
the rectified universal mains voltage in an efficient way. A second internal low-voltage SOI
die is used for accurate, high-speed protection functions and control.
The topology of a PFC and a resonant converter controlled by the TEA1713 is flexible and
enables a broad range of applications for wide input (85 V to 264 V) AC mains voltages.
The combination of PFC and resonant controller in one IC makes the TEA1713 suitable
for compact power supplies with a high level of integration and functionality.
2.4 Features
2.4.1 General features
•Integrated power factor controller and resonant controller
•Universal mains supply operation
•High level of integration, resulting in a low external component count and a cost
effective design
•Enable input. Also allows enabling of PFC only
•On-chip high-voltage start-up source
•Standalone operation or IC supply from external DC supply

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Application note Rev. 2 — 26 September 2011 7 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
2.4.2 Power factor controller features
•Boundary mode operation with on-time control for highest efficiency
•Valley/zero voltage switching for minimum switching losses
•Frequency limitation to reduce switching losses
•Accurate boost voltage regulation
•Burst mode switching with soft-start and soft-stop
2.4.3 Resonant half-bridge controller features
•Integrated high-voltage level shifter
•Adjustable minimum and maximum frequency
•Maximum 500 kHz half-bridge switching frequency
•Adaptive non-overlap timing
•Burst mode switching
2.4.4 Protection features
•Safe restart mode for system fault conditions
•General latched protection input for output overvoltage protection or external
temperature protection
•Protection timer for time-out and restart
•OverTemperature Protection (OTP)
•Soft (re)start for both converters
•Undervoltage protection for mains (brownout), boost, IC supply and output voltage
•Overcurrent regulation and protection for both converters
•Accurate overvoltage protection for boost voltage
•Capacitive mode protection for resonant converter
2.5 Protection
The TEA1713 provides several protection functions that combine detection with a
response to solve the problem. By regulating the frequency as a reaction to, for example,
overpower or bad half-bridge switching, the problem can be solved or operation kept safe
until it is decided to stop and restart (timer function).
2.6 Typical areas of application
•LCD television
•Plasma television
•High-power adapters
•Slim notebook adapters
•PC power supplies
•Office equipment

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Application note Rev. 2 — 26 September 2011 8 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
3. Pin overview with functional description
Table 2. Pinning overview
Pin Name Functional description
1 COMPPFC Frequency compensation for the PFC control-loop.
Externally connected filter with typical values: 150 nF (33 k+ 470 nF)
2 SNSMAINS Sense input for mains voltage.
Externally connected to resistive divided mains voltage.
This pin has four functions:
•Mains enable level: Vstart(SNSMAINS) =1.15V
•Mains stop level (brownout): Vstop(SNSMAINS) =0.9V
•Mains-voltage compensation for the PFC control-loop gain bandwidth
•Fast latch reset: Vrst(SNSMAINS) =0.75V
The mains enable and mains stop level enable and disable the PFC. Enabling and disabling of
the resonant controller is based on the voltage on SNSBOOST.
The voltage on the SNSMAINS pin must be an averaged DC value, representing the AC line
voltage. Do not use the pin for sensing the phase of the mains voltage.
Open pin detection is included by an internal current source (33 nA).
3 SNSAUXPFC Sense input from an auxiliary winding of the PFC coil for demagnetization timing and valley
detection to control the PFC switching. It is 100 mV level with a time-out of 50 s.
Connect the auxiliary winding via an impedance to the pin (recommended is a 5.1 kseries
resistor) to prevent damage of the input during surges (e.g. lightning).
Open pin detection is included by an internal current source (33 nA).
4 SNSCURPFC Current sense input for PFC.
This input is used to limit the maximum peak-current in the PFC core. The PFCSENSE is a
cycle-by-cycle protection. The PFC MOSFET is switched off when the level reaches 0.5 V.
The internal logic controls a 60 A internal current source connected to the pin. This current
source is used to implement a soft-start and soft-stop function for the PFC to prevent audible
noise in Burst mode.
The pin is also used to enable the PFC. The PFC only starts when the internal current source
(60 A) is able to charge the soft-start capacitor to a voltage of 0.5 V. A minimum soft-start
resistor of 12 kis required to guarantee enabling of the PFC.
The value of the capacitor on SNSCURPFC provides the soft-start and soft-stop timing in
combination with the parallel resistor value.
5 SNSOUT Input for indirectly sensing the output voltage of the resonant converter. It is normally connected
to an auxiliary winding of HBC and is also an input for the Burst mode of HBC or PFC + HBC.
This pin has four functions related to internal comparators:
•Overvoltage protection: SNSOUT > 3.5 V, latched
•Undervoltage protection: SNSOUT < 2.3 V, protection timer
•Hold HBC: SNSOUT < 1.0 V, stop switching HBC (Burst mode)
•Hold HBC + PFC: SNSOUT < 0.4 V, stop switching HBC and PFC (Burst mode)
The pin also contains an internal current source of 100 A that, initially, generates a voltage up
to 1.5 V across an external impedance (> 20 krecommended) to avoid unintended Burst
mode operation.

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Application note Rev. 2 — 26 September 2011 9 of 102
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TEA1713 resonant power supply control IC with PFC
6 SUPIC IC voltage supply input and output of the internal HV start-up source.
All internal circuits are directly or indirectly (via SUPREG) supplied from this pin, except for the
high-voltage circuit.
The buffer capacitor on SUPIC can be charged in several ways:
•Internal High-Voltage (HV) start-up source
•Auxiliary winding from HBC transformer or capacitive supply from switching half-bridge
node
•External DC supply, for example a standby supply
The IC enables operation when the SUPIC voltage has reached the start level of 22 V (for
HV-start) or 17 V (for external supply). It stops operation below 15 V and a shutdown reset is
activated at 7 V.
7 GATEPFC Gate driver output for PFC MOSFET.
8 PGND Power ground. Reference (ground) for HBC low-side and PFC driver.
9 SUPREG Output of the internal regulator: 10.9 V.
Internal IC functions such as the MOSFET drivers use the supply created by this function . It can
also be used to supply an external circuit.
SUPREG can provide a minimum of 40 mA.
SUPREG becomes operational after SUPIC has reached its start level.
The IC starts full operation when SUPREG has reached 10.7 V.
UVP: If SUPREG drops below 10.3 V after start, the IC stops operating and the current from
SUPIC is limited to 5.4 mA, to allow recovery.
10 GATELS Gate driver output for low side MOSFET of HBC.
11 n.c. Not connected, high-voltage spacer.
12 SUPHV High-voltage supply input for internal HV start-up source.
In a standalone power supply application, this pin is connected to the boost voltage. SUPIC and
SUPREG are charged with a constant current by the internal start-up source. SUPHV operates
at a voltage above 25 V.
Initially the charging current is low (1.1 mA). When the SUPIC exceeds the short circuit
protection level of 0.65 V, the generated current increases to 5.1 mA. The source is switched off
when SUPIC reaches 22 V which initiates a start operation. During start operation, an auxiliary
supply takes over the supply of SUPIC. If the takeover is not successful, the SUPHV source is
reactivated and a restart is made (SUPIC below 15 V).
13 GATEHS Gate driver output for high-side MOSFET of HBC.
14 SUPHS High-side driver supply connected to an external bootstrap capacitor between HB and SUPHS.
The supply is obtained using an external diode between SUPREG and SUPHS.
15 HB Reference for the high-side driver GATEHS.
It is an input for the internal half-bridge slope detection circuit for adaptive non-overlap
regulation and Capacitive mode protection. It is externally connected to a half-bridge node
between the MOSFETs of HBC.
16 n.c. Not connected, high-voltage spacer.
Table 2. Pinning overview …continued
Pin Name Functional description

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TEA1713 resonant power supply control IC with PFC
17 SNSCURHBC Sense input for the momentary current of the HBC. If the voltage level (that represents the
primary current) becomes too high, internal comparators determine the regulation to a higher
frequency (SNSCURHBC = 0.5 V) or protect (SNSCURHBC = 1 V) by switching immediately
to maximum frequency.
The provided additional current from SNSCURHBC can compensate variations at protection
level, caused by HBC input voltage variations. This current leads to a voltage offset across the
external series resistance value. The current measurement resistor and an extra series
resistance, which has a typical value of 1 k, normally provide this series resistance .
18 SGND Signal ground, reference for IC.
19 CFMIN Oscillator pin.
The value of the external capacitor determines the minimum switching frequency of the HBC. In
combination with the resistor value on RFMAX, it sets the operating frequency range.
A triangular waveform is generated on the CFMIN capacitor (Vlow(CFMIN) = 1 V and
Vhigh(CFMIN) = 3 V)) to facilitate switching timing. A fixed minimum (dis)charging current of
150 A determines the minimum frequency. During special conditions, the (dis)charging current
is reduced to 30 A to slow down the charging temporarily.
An internal function limits the operating frequency to 670 kHz.
20 RFMAX Oscillator frequency pin.
The value of the resistor connected between this pin and ground, determines the frequency
range. Both the minimum and maximum frequencies of the HBC are preset. CFMIN sets the
minimum frequency. The absolute maximum frequency is internally limited to 670 kHz.
The voltage on RFMAX and the value of the resistor connected to it, determine the variable part
(in addition to the fixed 150 A) of the (dis)charging current of the CFMIN capacitor. The voltage
on RFMAX can vary between 0 V (minimum frequency) and 2.5 V (maximum frequency).
SNSFB and the SSHBC/EN function drive the RFMAX voltage (running frequency).
The protection timer is started when the voltage level is above 1.88 V. An error is assumed
when the HBC is operating at high frequency for a longer time.
21 SNSFB Sense input for HBC output regulation feedback by voltage.
Sinking a current from SNSFB creates the feedback voltage on SNSFB. The regulation voltage
is produced by feeding this current through a 1.5 kinternal resistor which is internally
connected to 8.4 V.
The regulation voltage range is from 4.1 V to 6.4 V. It corresponds with the maximum and
minimum frequencies that are controlled by SNSFB. The SNSFB range is limited to 65 % of the
maximum frequency preset by RFMAX.
The provision of open-loop detection activates the protection timer when SNSFB exceeds 7.7 V.
Table 2. Pinning overview …continued
Pin Name Functional description

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Application note Rev. 2 — 26 September 2011 11 of 102
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TEA1713 resonant power supply control IC with PFC
22 SSHBC/EN Combined soft-start/protection frequency control of HBC and IC enable input (PFC or
PFC + HBC). Externally connected to a soft-start capacitor and an enable pull-down function.
This pin has three functions:
•Enable PFC (> 1 V) and PFC + HBC (> 2 V)
•Frequency sweep during soft-start from 3.2 V to 8 V
•Frequency control during protection between 8 V to 3.2 V
Seven internal current sources operate the frequency control, depending on which one of the
following actions is required:
•Soft-start + OverCurrent Protection: high/low charge (160 A/40 A) + high/low discharge
(160 A/40 A)
•Capacitive mode regulation: high/low discharge (1800 A/440 A)
•General: bias discharge (5 A)
23 RCPROT Timer presetting for time-out and restart. The values of an externally connected resistor and
capacitor determine the timing.
A 100 A charge current activates the timer during certain protection events:
•Overcurrent regulation (SNSCURHBC)
•High-frequency protection (RFMAX)
•Open-loop protection (SNSFB)
•Undervoltage protection (SNSOUT)
When the level of 4 V is reached the protection is activated. The resistor discharges the
capacitor and at a level of 0.5 V, a restart is made.
If an SCP (SNSBOOST) occurs, the RCPROT capacitor is quickly charged by 2.2 mA. After it
reaches the 4 V level, the capacitor is discharged after which a new start is initiated.
24 SNSBOOST Sense input for boost voltage regulation (output voltage of the PFC stage). It is externally
connected to a resistive divided boost voltage.
This pin has four functions:
•Pin SNSBOOST short detection: VSCP(SNSBOOST) 0.4 V
•Regulation of PFC output voltage: Vreg(SNSBOOST) =2.5V
•PFC soft-OVP (cycle-by-cycle): VOVP(SNSBOOST) 2.63 V
•Brownout function for HBC: converter enable voltage: Vstart(SNSBOOST) = 2.3 V and
converter disable voltage: VUVP(SNSBOOST) =1.6V
Table 2. Pinning overview …continued
Pin Name Functional description

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TEA1713 resonant power supply control IC with PFC
4. Application diagram and block diagrams
Fig 1. Basic application diagram TEA1713
001aal015
TEA1713
mains
rect Boost
SupHs
SupIc
TrPfc
TrHbc
CSoStPfc
RCurcmp
RCurHbc
CRes
CHB
CSupHs
RCurPfc
CSupReg
CSupIc
Output
DSupHs
RCurPfc
RProt
CProt
CSoStHbc
SSHbcEn
Cfmin
Rfmax
AuxPfc
DrPfc
SNSBOOST GATEHS
HB
Hb
GATELS
SNSCURHBC
SNSOUT
SNSFB
RFMAX
CFMIN
SSHBC/EN
SNSAUXPFC
SNSMAINS
SNSCURPFC
GATEPFC
COMPPFC
RCPROT
SUPHV SUPIC SUPREG
SupReg
CurHbc
SUPHS
SGNDPGND
POWER FACTOR CONTROLLER
Disable

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Application note Rev. 2 — 26 September 2011 13 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
Fig 2. Block diagram TEA1713
coa073
1.2
MΩ
1.2
MΩ
1.2
MΩSNSMAINS
MainsReset
MainsUV
SoftStart
min
Ton max Ton
14
kΩ
9.8 MΩ
62 kΩ
3.3 μF
47 μA
60 μA
−39.....+39 μA
GmAmplifier
33 nA
800 mV
1 ×
5.8 V
2.5 V
120 μA
5.6 V
2.2 V
1.0 V
Enable
ENABLE DETECTION
EnablePfc
3.2 V
3.2 V 8.0 V
ClampEndSoftStart
40 μA
120 μA
40 μA
1360 μA
440 μA
5 μA
42 μA
FREQUENCY
CONTROL
HBC
D
C
B
A
E
F
33 nA
33 nA RSoStPfct
RCurPfc
CSoStPfct
45 nA 5.8 V 1 nF
2.5 V
0.4 V
Demag
ValleyPfc
DRIVE CONTROL
SPIKE
FILTER
0.1 V
0.5 V
0.52 V
50 mV
COMPPFC
SPIKE FILTER
BoostOv
BoostSCProt
BoostOv level = 2.63 V
BoostStart = 2.3 V
BoostUvp = 1.6 V
SNSBOOST
SUPHV
SNSAUXPFC
AuxPfc
SNSCURPFC
open pin
detection
PGND
SupReg
SSHBC/EN
Disable supply
Enable supply
0 to >2 V
GATEPFC
Boost
SUPREG
1.05 V
UV-Clamp
3.0 V
0.89 V
1.15 V 1.25 V
3.5 V
GatePfcDig
Ton
SoftStopEnd
OCPfc
I = c*V2
8.4 V
demagnetized
VRect/N
VRect
VBoost
(VBoost − VRect)/N
Vaux,demag
0
0
magnetized
Demagnetization
VALLEY SWITCHING
lTrPfc
AuxPfc
DrPfc
GatePfc
Valley
(= top for detection)
0
off
on
t
VALLEY
DETECTION
frequency limit
125 kHz
SuplcChargeLow = 1.1 mA
SuplcCharge = 5.1 mA
HV START-UP SOURCE
CONTROL
0.65 V
10.9 V 5.4 mA
SUPIC
SupReg
EnableSupReg
reduced
current
SuplcShort
startlevel Hv = 22 V
startlevel Lv = 17 V
stoplevel = 15 V
SupRegUvStart
startlevel = 10.7 V
SupRegUvStop
stoplevel = 10.3 V
SupHvPresent CSUPREG
Protection
HBC softstart reset
0
Vfmax(SSHBC)
VSSHBC/EN
Vfmin(SSHBC)
0
fmin
fHB
fmax
t
off
on
fmax
forced fast
sweep slow sweep regulationregulation
Vss(hf-lf)(SSHBC)
PFCsense
Iswitch
OCP_lvl
OCP_lvl
PFC driver
Start Rdy 0
0
0
0
0
Softstart, Softstop
Softstart Softstop
0ISNSFB
Vopen = 8.4 V
0.66 mA
Ifmin
VRFMAX
2.2 mA
Ifmax
00
VSSHBC = 8 V
260 μA
IOLP
VOLP = 7.7 V
Vfmin = 6.4 V
Vfmax = 4.1 V
Vclamp,fmax = 3.2 V
VSNSFB
8 mA
Iclamp,max
2.5 Vtyp = Vfmax
1.5 Vtyp = 0.6 ×Vfmax
passed
0
no
yes
Vhigh(RCPROT)
Vlow(RCPROT)
restart request
VRCPROT
t
restart time
RESTART TIMER
014aaa864
001aal029
001aal040
001aal064

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Application note Rev. 2 — 26 September 2011 14 of 102
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TEA1713 resonant power supply control IC with PFC
Fig 3. Block diagram TEA1713
coa073
1.2
MΩ
1.2
MΩ
1.2
MΩSNSMAINS
MainsReset
MainsUV
SoftStart
min
Ton max Ton
14
kΩ
9.8 MΩ
62 kΩ
3.3 μF
47 μA
60 μA
−39.....+39 μA
GmAmplifier
33 nA
800 mV
1 ×
5.8 V
2.5 V
120 μA
5.6 V
2.2 V
1.0 V
Enable
ENABLE DETECTION
EnablePfc
3.2 V
3.2 V 8.0 V
ClampEndSoftStart
40 μA
120 μA
40 μA
1360 μA
440 μA
5 μA
42 μA
FREQUENCY
CONTROL
HBC
D
C
B
A
E
F
33 nA
33 nA RSoStPfct
RCurPfc
CSoStPfct
45 nA 5.8 V 1 nF
2.5 V
0.4 V
Demag
ValleyPfc
DRIVE CONTROL
SPIKE
FILTER
0.1 V
0.5 V
0.52 V
50 mV
COMPPFC
SPIKE FILTER
BoostOv
BoostSCProt
BoostOv level = 2.63 V
BoostStart = 2.3 V
BoostUvp = 1.6 V
SNSBOOST
SUPHV
SNSAUXPFC
AuxPfc
SNSCURPFC
open pin
detection
PGND
SupReg
SSHBC/EN
Disable supply
Enable supply
0 to >2 V
GATEPFC
Boost
SUPREG
1.05 V
UV-Clamp
3.0 V
0.89 V
1.15 V 1.25 V
3.5 V
GatePfcDig
Ton
SoftStopEnd
OCPfc
I = c*V2
8.4 V
demagnetized
VRect/N
VRect
VBoost
(VBoost − VRect)/N
Vaux,demag
0
0
magnetized
Demagnetization
VALLEY SWITCHING
lTrPfc
AuxPfc
DrPfc
GatePfc
Valley
(= top for detection)
0
off
on
t
VALLEY
DETECTION
frequency limit
125 kHz
SuplcChargeLow = 1.1 mA
SuplcCharge = 5.1 mA
HV START-UP SOURCE
CONTROL
0.65 V
10.9 V 5.4 mA
SUPIC
SupReg
EnableSupReg
reduced
current
SuplcShort
startlevel Hv = 22 V
startlevel Lv = 17 V
stoplevel = 15 V
SupRegUvStart
startlevel = 10.7 V
SupRegUvStop
stoplevel = 10.3 V
SupHvPresent CSUPREG
Protection
HBC softstart reset
0
Vfmax(SSHBC)
VSSHBC/EN
Vfmin(SSHBC)
0
fmin
fHB
fmax
t
off
on
fmax
forced fast
sweep slow sweep regulationregulation
Vss(hf-lf)(SSHBC)
PFCsense
Iswitch
OCP_lvl
OCP_lvl
PFC driver
Start Rdy 0
0
0
0
0
Softstart, Softstop
Softstart Softstop
0ISNSFB
Vopen = 8.4 V
0.66 mA
Ifmin
VRFMAX
2.2 mA
Ifmax
00
VSSHBC = 8 V
260 μA
IOLP
VOLP = 7.7 V
Vfmin = 6.4 V
Vfmax = 4.1 V
Vclamp,fmax = 3.2 V
VSNSFB
8 mA
Iclamp,max
2.5 Vtyp = Vfmax
1.5 Vtyp = 0.6 ×Vfmax
passed
0
no
yes
Vhigh(RCPROT)
Vlow(RCPROT)
restart request
VRCPROT
t
restart time
RESTART TIMER
014aaa864
001aal029
001aal040
001aal064

AN10881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Application note Rev. 2 — 26 September 2011 15 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
Fig 4. Block diagram TEA1713
coa076
1.5 kΩ
RProt
340 kΩ
CProt
640 nF
TEA1713 pin list:
1. COMPPFC
2. SNSMAINS
3. SNSAUXPFC
4. SNSCURPFC
5. SNSOUT
6. SUPIC
7. GATEPFC
8. PGND
9.SUPREG
10. GATELS
11. n.c.
12. SUPHV
24. SNSBOOST
23. RCPROT
22. SSHBC/EN
21. SNSFB
20. RFMAX
19. CFMIN
18. SGND
17. SNSCURHBC
16. n.c.
15. HB
14. SUPHS
13. GATEHS
Output
High
Voltage
Output
Low
Voltage
Output
Vout
CCO
RFMAX
FreqHigh ProtTimer
30 μA
FMAX,limit
Rfmax Cfmin
FreqHbc
(75 % of max)
1.8 V
Slowed
down
current
CFMIN
Vhigh = 3.0 V
Vlow = 1.0 V
HBC DRIVE CONTROL
Drive GateHS
Drive GateLS
Enable
Logic
SUPHS
GATEHS
Hb
HB
7.3 mA
3.2 V
6.4 V
2.2 mA 100 μA
100 μA
VOLTAGE PIN SSHBC
POLARITY INVERSION
(max 2.5 V)
VOLTAGE PIN RFMAX
HBC OSCILLATOR
CONVERSION TO CURRENT
via Rfmax
FEEDBACK CURRENT
PIN SNSFB
FIXED fmin CURRENT
CONVERSION TO
VOLTAGE (max 1.5 V)
(DIS-)CHARGE CURRENT
PIN CFMIN
CONVERSION TO
FRQUENCY via Cfmin
VCur(HBC) = Rcur(HBC) × ICur(HBC)
Iocr(high)
Iocp(high)
Iocp(nom)
Iocr(nom)
−I
ocr(nom)
−Iocp(nom)
−Iocr(high)
−Iocp(high)
ICur(HBC)
ISNSCURHBC
HBC BOOST COMPENSATION
Vreg
Vuvp
VBoost
GATELS
GATEHS
sink current only with positive VSNSCURHBC
sink
source
0
0
0
t
t
t
t
low VBoost
strong compensation
high OCP
low VBoost
strong compensation
high OCR
nominal VBoost
no compensation
nominal OCP
nominal VBoost
no compensation
nominal OCR
VSNSCURHBC
t
t
VSNSCURHBCVocr(HBC)
−Vocr(HBC)
Vocp(HBC)
−Vocp(HBC)
0 μA0 V 1.8 V VSNSBOOST
Icompensation on SNSCURHBC
2.5 V =
Vregulation
170 μA
−170 μA
500 mV
−500 mV
VSNSCURHBC
160 μA
40 μA
−40 μA
−160 μA
ISSHBC/EN
VSSHBC/EN
8 V
5.6 V
3.2 V
VOutput
Vregulate
0
0
0
HBC 0CR
t
t
t
t
Fast soft-start sweep (charge and discharge) Slow soft-start sweep (charge and discharge)
ADAPTIVE NON OVERLAP
LEVEL
SHIFTER
Hb
SupHs
Drive GateHS
Drive GateLS
CAPACITIVE MODE REGULATION
fast HB slope
VBoost
Hb
GateLs
GateHs
0slow HB slope incomplete HB slope t
fHB,limit
fmax,B
Vfmax VRFMAX
A
curve Cfmin Rfmax
A high high
B low low
C low too low
B
C
fmax,A
fmin,
B and C
fmin,A
0
fHB
SLOPE
DETECTION
SlopeNeg
SlopeNegStart
SlopePos
SlopePosStart
SupHs
SupHs
Hb
GATELS
SNSOUT
SNSFB
SupReg
1.5 V
3.5 V
2.35 V
1.1 V
0.4 V
ProtTimer
(latched)
ProtSd
OutputUv
OutputOv
HoldHbc
HoldPfc
RCPROT
Restart
Over Current Regulation HBC
High Frequency Protection HBC
Open Loop Protection SNSFB
Under Voltage Protection SNSOUT
Short Circuit Protection SNSBOOST (2.2 mA)
4.0 V
0.5 V
SNSCURHBC
SPIKE
FILTER
SUPIC
SupReg
PGND
HB 4.5 V HB
SupReg
CSupReg
CRes2
CCurHbc
CSuplc
RCurHbc
RCurcmp
1 kΩ
CHb
CRes1
SPIKE
FILTER
BOOST VOLTAGE
COMPENSATION
SnsBoost 2.5 V => 0 μA
1.7 V => 100 μA
1 V
1 V
0.5 V
0.5 V
0.4 V
8.1 V
8.4 V
ProtTimer
open loop level = 7.7 V
Freq.
Control
ProtTimer
Standby
(external)
supply
passed
0
0
none
present
short
error long
error
PROTECTION TIMER repetative
error
Vhigh(RCPROT)
Islow(RCPROT)
IRCPROT
Error
VRCPROT
t
Protection time
Θ
RESTART/
PROTECTION TIMER CONTROL
014aaa865
014aaa860
001aal033
001aal037
001aal063
001aal044
B
C
D
E
F
A

AN10881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Application note Rev. 2 — 26 September 2011 16 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
5. Supply functions
5.1 Basic supply system overview
5.1.1 TEA1713 supplies
The main supply for the TEA1713 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: GATEPFC, GATELS and GATEHS. A bootstrap function with an
external diode is used to make supply SUPHS.This is used to supply GATEHS.
SUPIC and SUPREG also supply other internal TEA1713 circuits.
Fig 5. Basic overview internal IC supplies
001aal017
TEA1713
MAINS
VOLTAGE
12
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
GATEPFC GATEHS 14
15
9
SUPHS
HB
SUPREG
6 SUPIC VAUXILIARY
5 SNSOUT
GATELS
10.3 V
COMP
OVP
latched
shutdown
UVP
protection
timer
3.5 V
COMP
2.35 V
COMP
1.1 mA5.1 mA
HV
STARTUP
CONTROL
VBOOST

AN10881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Application note Rev. 2 — 26 September 2011 17 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
5.1.2 Supply monitoring and protection
The supply voltages are internally monitored to determine when to initiate certain actions,
such as starting, stopping or protection.
In several applications (e.g. when using an auxiliary winding construction) the SUPIC
voltage can also be used to monitor the HBC output voltage by protection input SNSOUT.
5.2 SUPIC - the low voltage IC supply
SUPIC is the main IC supply. Except for the SUPHV circuit, all internal circuits are either
directly or indirectly supplied from this pin.
5.2.1 SUPIC start-up
Connect SUPIC to an external buffer capacitor. This buffer capacitor can be charged in
several ways:
•Internal high-voltage (HV) start-up source
•Auxiliary supply, e.g. from a winding on the HBC transformer
•External DC supply, e.g. from a standby supply
The IC starts operating when the SUPIC and SUPREG voltage have reached the start
level. The start level value of SUPIC depends on the condition of the SUPHV pin.
5.2.1.1 SUPHV 25 Vmax
This is the case in a standalone application where the HV start-up source initially charges
SUPIC. The SUPIC start level is 22 V. The large difference between start level and stop
level (15 V) is used to allow discharge of the SUPIC capacitor until the auxiliary supply
can take over the IC supply.
5.2.1.2 SUPHV not connected/used
This is the case when the TEA1713 is supplied from an external DC supply. The SUPIC
start level is now 17 V. During start-up and operation the IC is continuously supplied by
the external DC supply. The SUPHV pin must not be connected for this kind of application.
5.2.2 SUPIC stop, UVP and SCP
The IC stops operating when the SUPIC voltage drops below 15 V which is the
UnderVoltage Protection (UVP) of SUPIC. While in the process of stopping, the HBC
continues until the low-side MOSFET is active, before stopping the PFC and HBC
operation.
SUPIC has a low level detection at 0.65 V to detect a short circuit to ground. This level
also controls the current source from the SUPHV pin.

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Application note Rev. 2 — 26 September 2011 18 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
5.2.3 SUPIC current consumption
The SUPIC current consumption depends on the state of the TEA1713.
•Disabled IC state:
When the IC is disabled via the SSHBC/EN pin, the current consumption is low at
250 A.
•SUPIC charge, SUPREG charge, thermal hold, restart and shutdown state:
During the charging of SUPIC and SUPREG before start-up, during a restart
sequence or during shutdown after activation of protection, only a small part of the IC
is active. The PFC and HBC are disabled. The current consumption from SUPIC in
these states is small at 400 A.
•Boost charge state:
PFC is switching and HBC is still off. The current from the high-voltage start-up source
is large enough to supply SUPIC, so current consumption is below the maximum
current (5.1 mA) that SUPHV can deliver.
•Operating supply state:
Both PFC and HBC are switching. The current consumption is larger. The MOSFET
drivers are dominant in the current consumption (see Section 5.5.5), especially during
soft-start of the HBC, when the switching frequency is high, and also during normal
operation. Initially, the stored energy in the SUPIC capacitor delivers the SUPIC
current. After a short time the current supply is taken over by the supply source on
SUPIC during normal operation.
5.3 SUPIC supply using HBC transformer auxiliary winding
5.3.1 Start-up by SUPHV
In a standalone power supply application, the IC can be started by a high-voltage source
such as the rectified mains voltage by connecting the high-voltage input SUPHV to the
boost voltage (PFC output voltage).
The internal HV start-up source, which delivers a constant current from SUPHV to SUPIC,
charges the SUPIC and SUPREG. SUPHV is operational at a voltage > 25 V.
As long as the voltage at SUPIC is below the short circuit protection level (0.65 V), the
current from SUPHV is low (1.1 mA). This is to limit the dissipation in the HV start-up
source when SUPIC is shorted to ground.
During normal conditions, SUPIC quickly exceeds the protection level and the HV start-up
source switches to normal current (5.1 mA). The HV start-up source switches off when
SUPIC has reached the start level (22 V). The current consumption from SUPHV is low
(7 A) when switched off.
When SUPIC has reached the start level (22 V), SUPREG is charged. When SUPREG
reaches the level of 10.7 V, it enables operation of HBC and PFC.
The auxiliary winding supply of the HBC transformer must take over the supply of SUPIC
before it is discharged to the SUPIC under voltage stop level (15 V).

AN10881 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2011. All rights reserved.
Application note Rev. 2 — 26 September 2011 19 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
5.3.2 Block diagram for SUPIC start-up
5.3.3 Auxiliary winding on the HBC transformer
An auxiliary winding on the HBC transformer can be used to obtain a supply voltage for
SUPIC during operation. As SUPIC has a wide operational voltage range (15 V to 38 V),
this is not a critical parameter.
But:
•The voltage on SUPIC must be low for low power consumption.
•The auxiliary supply must be made accurately representing the output voltage to use
the voltage from the auxiliary winding for IC supply and HBC output voltage
measurement (by SNSOUT). Place this winding on the secondary (output) side to
ensure good coupling.
•When mains insulation is included in the HBC transformer, it can impact the
construction of the auxiliary winding. Triple insulated wire is needed when the
auxiliary winding is placed on the mains-insulated area of the transformer
construction.
Fig 6. Block diagram: SUPIC and SUPREG start-up with SUPHV and auxiliary supply
001aal018
SuplcChargeLow = 1.1 mA
SuplcCharge = 5.1 mA
SuplcCharge = off
HV START-UP SOURCE
CONTROL
0.65 V
10.9 V 5.5 mA
SUPIC
SUPHV
SUPREGSupReg
EnableSupReg
V
AUXILIARY
reduced
current
SuplcShort
startlevel Hv = 22 V
startlevel Lv = 17 V
stoplevel = 15 V
SupRegUvStart
startlevel = 10.7 V
SupRegUvStop
stoplevel = 10.3 V
SupHvPresent
CSUPREG

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Application note Rev. 2 — 26 September 2011 20 of 102
NXP Semiconductors AN10881
TEA1713 resonant power supply control IC with PFC
5.3.3.1 SUPIC and SNSOUT by auxiliary winding
The SNSOUT input provides a combination of four functions:
•Overvoltage protection: SNSOUT > 3.5 V, latched
•Undervoltage protection: SNSOUT < 2.35 V, protection timer
•Hold HBC: SNSOUT < 1.1 V, stop switching HBC (for Burst mode)
•Hold HBC + PFC: SNSOUT < 0.4 V, stop switching HBC and PFC (for Burst mode)
Remark: A more detailed explanation of the SNSOUT functions can be found in
Section 10.3.1 and Section 10.3.2.
Often, a circuit is used which combines SUPIC and the output voltage monitoring by
SNSOUT, with one auxiliary winding on the HBC transformer. But an independent
construction for SUPIC and SNSOUT is also possible. This could be in a situation where
SUPIC is supplied by a separate standby supply and an auxiliary winding is only used for
output voltage sensing. It is also possible not to use SNSOUT for output sensing but as a
general-purpose protection input. See Section 10.3.3 for more information.
In a combined function of SUPIC and SNSOUT by an auxiliary winding on the HBC
transformer, some issues must be addressed to obtain a good representation of the output
voltage for SNSOUT measurement.
The advantage of a good coupling/representation of the auxiliary winding with the output
windings is also that a stable auxiliary voltage is obtained for SUPIC. A low SUPIC voltage
value can be designed more easily for lowest power consumption.
5.3.3.2 Auxiliary supply voltage variations by output current
At high (peak) current loads, the voltage drop across the series components of the HBC
output stage (resistance and diodes) is compensated by regulation. This results in a
higher voltage on the windings at higher output currents due to the higher currents
causing a larger voltage drop across the series components. An auxiliary winding supply
shows this variation caused by the HBC output.
5.3.3.3 Voltage variations by auxiliary winding position: primary side component
Due to a less optimal position of the auxiliary winding, the voltage for SNSOUT and/or
SUPIC can contain a certain amount of undesired primary voltage component. This can
seriously endanger the feasibility of the SNSOUT sensing function.
Fig 7. Auxiliary winding on primary side (left) and secondary side (right)
001aal019