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AN10907
TEA1613T resonant power supply control IC
Rev. 1 — 28 December 2010
Document information
Info
Keywords
Abstract
Content
TEA1613T, burst mode, adapter, LCD TV, plasma TV, resonant, converter.
This application note discusses the TEA1613T application functions.
The TEA1613T provides the drive function for the two discrete power
MOSFETs in a resonant half-bridge configuration.
The TEA1613T integrates a controller for a half-bridge resonant converter
(HBC).
The controller for a zero-voltage switching LLC resonant converter
includes a high-voltage level-shift circuit and several protection features
like over-current protection, open-loop protection, capacitive mode
protection and a general purpose latched protection input.
In addition to the normal frequency controlled operation mode, it also
supports burst mode operation.
The proprietary high voltage BCD Powerlogic process makes an efficient,
direct start-up possible from the rectified universal mains voltage. A
second low voltage SOI IC is used for accurate, high speed protection
functions and control.
The integrated functionality makes the TEA1613T very suitable for power
supplies in LCD-TV, plasma televisions, PC power supplies, high-power
office equipment and adapters.
A similar product is the TEA1713, which also contains an integrated PFC
controller.
Application note
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Summary of Contents for NXP Semiconductors AN10907
- Page 1 AN10907 TEA1613T resonant power supply control IC Rev. 1 — 28 December 2010 Application note Document information Info Content Keywords TEA1613T, burst mode, adapter, LCD TV, plasma TV, resonant, converter. Abstract This application note discusses the TEA1613T application functions. The TEA1613T provides the drive function for the two discrete power MOSFETs in a resonant half-bridge configuration.
- Page 2 AN10907 NXP Semiconductors TEA1613T resonant power supply control IC Revision history Date Description 20101228 first issue AN10907 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Application note Rev. 1 — 28 December 2010...
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Page 3: Contents
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 1. Introduction 1.1 Scope and setup of this document This application note discusses the TEA1613T functions for applications in general. The extensive functionality of the TEA1613T leads to a high number of subjects to discuss. -
Page 4: Tea1613T Highlights And Features
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 2. TEA1613T 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. -
Page 5: Resonant Half-Bridge Controller Features
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 2.3 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 Protection features... -
Page 6: Pin Overview With Functional Description
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 3. Pin overview with functional description Table 1. Pinning overview Name Functional description SNSOUT/PFCON Input for sensing (indirectly) the output voltage of resonant converter. Normally connected to an auxiliary winding of HBC. - Page 7 AN10907 NXP Semiconductors TEA1613T resonant power supply control IC Table 1. Pinning overview …continued Name Functional description 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, with the exception of the high-voltage circuit.
- Page 8 AN10907 NXP Semiconductors TEA1613T resonant power supply control IC Table 1. Pinning overview …continued Name Functional description SGND Signal ground, reference for IC. 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.
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Page 9: Fig 1. Basic Application Diagram Tea1613T
xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x PfcOnNot POWER FACTOR rect Boost CONTROLLER C SupIc D SupHs SupReg SupHs mains C SupReg... -
Page 10: Fig 2. Tea1613T With Application Block Diagram
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 5. Block diagram Boost 120 μA 5.6 V HBC softstart reset 40 μA Protection fmin(SSHBC) SSHBC/EN ss(hf-lf)(SSHBC) 120 μA fmax(SSHBC) 40 μA regulation fast slow sweep regulation forced sweep 1360 μA 014aaa864 440 μA... -
Page 11: (Part 2)
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC TEA1613 N1A pin list: Enable (75 % of max) FreqHigh 1. SNSOUT/PFCON 20. RCPROT Logic ProtTimer 1.83 V 2. SNSFB 19. SSHBC/EN FreqHbc 3. SNSBURST 18. RFMAX max,limit 4. SNSBOOST 17. CFMIN Drive GateHS 5. -
Page 12: Fig 4. Basic Overview Internal Ic Supplies
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6. Supply functions 6.1 Basic supply system overview BOOST SUPHV SUPHS GATEHS 5.1 mA 1.1 mA STARTUP CONTROL 10.9 V SUPREG EXTERNAL COMP GATELS start when HVsupply 22 V COMP COMP... -
Page 13: Supic - The Low Voltage Ic Supply
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.2 SUPIC - the low voltage IC supply SUPIC is the main IC supply. With the exception of the SUPHV circuit, all internal circuits are either directly or indirectly supplied from this pin. -
Page 14: Fig 5. Block Diagram: Supic And Supreg Start-Up With Suphv And Auxiliary Supply
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.3 SUPIC supply using HBC transformer auxiliary winding 6.3.1 Start-up by SUPHV In a stand-alone power supply application, the IC can be started by a high voltage source such as the rectified mains voltage. For this purpose the high voltage input SUPHV can be connected to the boost voltage (for example a PFC output voltage). -
Page 15: Fig 6. Auxiliary Winding On Primary Side (Left) And Secondary Side (Right)
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.3.3 Auxiliary winding on the HBC transformer To obtain a supply voltage for SUPIC during operation, an auxiliary winding on the HBC transformer can be used. As SUPIC has a wide operational voltage range (15 V to 38 V), this is not a critical parameter. -
Page 16: Fig 7. Position The Auxiliary Winding For Good Output Coupling
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC In case of a combined function of SUPIC and SNSOUT/PFCON by an auxiliary winding on the HBC transformer, some issues need to be addressed to obtain a good representation of the output voltage for SNSOUT/PFCON measurement. -
Page 17: Difference Between Uvp On Snsout/Pfcon And Snscurhbc Ocp/Ocr
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.3.4 Difference between UVP on SNSOUT/PFCON and SNSCURHBC OCP/OCR In a system that uses output voltage sensing by means of the SNSOUT/PFCON function, there can be an overlap in functionality in an over-power or short circuit situation. In such a situation, often both the SNSOUT/PFCON UnderVoltage Protection (UVP) and the OverCurrent Protection/Regulation on SNSCURHBC, activates the protection timer. -
Page 18: Fig 8. Typical Supreg Voltage Characteristics For Load And Temperature
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC The series stabilizer for SUPREG is enabled after SUPIC has been charged. In this way optional external circuitry at SUPREG does not draw from the start-up current during the charging of SUPIC. The capacitor on SUPIC acts as a buffer at charge of SUPREG and start-up of the IC. -
Page 19: Fig 9. Block Diagram Of Internal Supreg Regulator
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.5.1 Block diagram of SUPREG regulator SUPIC SUPHV SOURCE 5.5 mA 10.9 V reduced C SUPIC current EnableSupReg SUPREG SupRegUvStart C SUPREG startlevel = 10.7 V SupRegUvStop stoplevel = 10.3 V 001aal434 Fig 9. -
Page 20: Supply Voltage For The Output Drivers: Suphs
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC The shape of the current from SUPREG at switch on is related to: • the supply voltage for the internal driver (10.9 V) • the characteristic of the internal driver •... -
Page 21: Fig 11. Typical Application Of Suphs
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC BOOST TEA1613 SUPHS GATEHS SUPREG GATELS 001aal437 Fig 11. Typical application of SUPHS 6.5.4.3 Lower voltage on SUPHS During normal operation, each time the half-bridge node (HB) is switched to ground level, the SUPHS capacitor is charged by the bootstrap function. -
Page 22: Supreg Supply Voltage For Other Circuits
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC I = 2 40 nC 100 kHz = 8 mA SUPIC Remark: Note that the calculated value is generally higher than the value found in practice, because the switching operation deviates from the MOSFET specification for gate 6.5.6 SUPREG supply voltage for other circuits... -
Page 23: Value Of The Capacitors On Supic, Supreg And Suphs
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.6 Value of the capacitors on SUPIC, SUPREG and SUPHS Some practical examples are provided in Section 6.6.1 Value of the capacitor on SUPIC 6.6.1.1 General It is generally advisable to use two types of capacitor on SUPIC. An SMD ceramic type, with a smaller value located close to the IC, and an electrolytic type providing the major part of the capacitance. -
Page 24: Value Of The Capacitor On Supreg
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 6.6.2 Value of the capacitor on SUPREG To support charging of SUPREG during an HV source start, the capacitor on SUPREG should not be larger than the capacitor on SUPIC. This is to prevent a severe voltage drop on SUPIC due to the charge of SUPREG. -
Page 25: Fig 12. Gatels And Gatehs Drivers
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 7. MOSFET drivers GATELS and GATEHS The TEA1613T provides 2 outputs for driving external high voltage power MOSFETs: • GATELS for driving the low side of the HBC MOSFET • GATEHS for driving the high side of the HBC MOSFET 7.1 GATELS and GATEHS... -
Page 26: Fig 13. Examples Of Gate Circuits
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 7.3 General details regarding MOSFET drivers Switch on The time to switch on is dependent upon: • the supply voltage for the internal driver • the characteristics of the internal driver •... -
Page 27: Fig 14. Simplified Model Of A Mosfet Drive
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC SUPREG R DS-ON charge EXTERNAL GATE CIRCUIT C gs discharge R DS-ON TEA1613 001aal435 Fig 14. Simplified model of a MOSFET drive 7.4 Specifications The main function of the internal MOSFET drivers is to source current and sink current to switch the external MOSFET switch on and off. -
Page 28: Fig 15. Snsboost Function
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8. HBC functions 8.1 SNSBOOST undervoltage or brownout protection level To prevent the HBC from operating at very low boost input voltages, the voltage on the SNSBOOST pin is sensed continuously. -
Page 29: Start And Stop Voltage With Series Resistance
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 1.60 V --------------- - 9800 k 1.60 V 335 V Boost stop 47 k 8.1.2 Start and stop voltage with series resistance When introducing a series resistance (Rs) in the connection of SNSBOOST, the start voltage can be increased independently. -
Page 30: Fig 16. Inductive Mode Hbc Switching
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.3 HBC adaptive non-overlap 8.3.1 Inductive mode (normal operation) The high efficiency of a resonant converter is the result of Zero-Voltage Switching (ZVS) of the power MOSFETs, also called soft-switching. To allow soft-switching, a small non-overlap time (also called dead time) is required between the on-time of the high-side MOSFET and low-side MOSFET. -
Page 31: Fig 17. Adaptive Non-Overlap Switching During Normal Operating Conditions
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC and the other MOSFET is switched-on. In this way the non-overlap time is automatically adjusted to the best value providing the lowest switching loss, even if the HB transition cannot be fully completed. -
Page 32: Fig 18. Capacitive Mode Hbc Switching
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC GateHs GateLs boost no HB slope wrong polarity TrHbc delayed oscillator fmin delayed switch-on during capacitive mode 001aal442 Fig 18. Capacitive mode HBC switching The adaptive non-overlap system of the TEA1613T always waits until the slope at the half-bridge node starts. -
Page 33: Fig 19. Capacitive/Inductive Hbc Operating
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC resistive capactive inductive a·V @ Qmax Mmax @ Vimin Mnom @ Vinom load independent point (series resonance) Mmin @ Vimax @ Qnom @ Qmin fmax 001aal443 Fig 19. Capacitive/inductive HBC operating frequencies CMR of the TEA1613T can be recognized by the typical slowing of the oscillator in combination with the discharging of SSHBC/EN. -
Page 34: Fig 21. Frequency Relationships
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.4 HBC oscillator The slope controlled oscillator determines the switching frequency of the half-bridge. The oscillator generates a triangular waveform at the external capacitor C fmin 8.4.1 Presets Two external components determine the frequency range: •... -
Page 35: Hbc Drive
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC The similarity when switching GATELS and GATEHS is that the oscillator signal determines the moment of switching off. The moment of switching on is determined by the HB sensing circuit. As the moment of switching on is determined by the HB sensing (and therefore not fixed), the time between switching one MOSFET off and the other one on, is adaptive non-overlap time (or dead time). -
Page 36: Maximum Frequency Setting For Rfmax
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 150 A oscillator min ----------------------------------------------------------------------- - CFMIN ---------------------------- (13) HB min oscillator HB min Example: Given f = 57 kHz HB(min) 150 A... -
Page 37: Fig 23. Typical Basic Snsfb Application
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.4.4 RFMAX and High Frequency Protection (HFP) Normally the converter does not operate continuously at the preset maximum frequency. This maximum frequency is only used for a short time during soft-start or temporary fault/overload conditions. -
Page 38: Fig 24. Snsfb V-I Characteristics
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC SNSFB RFMAX = 8.4 V open = 7.7 V 2.5 V = V fmax = 6.4 V fmin = 8 V SSHBC 1.5 V = 0.6 × V fmax = 4.1 V fmax = 3.2 V... -
Page 39: Levels
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.6 SSHBC/EN soft-start and enable The SSHBC/EN pin provides the following three functions: • Enables the IC (> 2.2 V) • It performs an HBC frequency sweep during soft-start from 3.2 V to 8 V •... -
Page 40: Switching On And Off Using Sshbc/En
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.6.1.1 Switching on and off using SSHBC/EN When a voltage is present at pin SUPHV or at pin SUPIC, a current of 42 A from the SSHBC/EN pin charges the external capacitor. If the pin is not pulled-down, this current initially lifts the voltage to 3.0 V. -
Page 41: Voltage
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.6.2.1 Soft-start voltage levels RFMAX = 2.5 V fmax(ss) 0.66 mA < I < 2.2 mA (regulating) SNSFB < 0.66 mA (not yet regulating) SNSFB RFMAX SSHBC 3.2 V = V 8.4 V = V... -
Page 42: Start-Up
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 500 mV SNSCURHBC −500 mV 160 μA 40 μA SSHBC/EN −40 μA −160 μA 5.6 V SSHBC/EN 3.2 V regulate Fast soft-start sweep (charge and discharge) Slow soft-start sweep (charge and discharge) 001aal452 Fig 28. -
Page 43: Fig 29. Soft-Start Reset And Two-Speed Soft-Start
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC frequency restores safe switching operation. Once the voltage at pin SSHBC/EN has reached 3.2 V, the control input of the oscillator is connected to the pin again and the normal soft-start sweep follows. -
Page 44: Fig 30. Ocp And Regulation Hbc
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC TEA1613 BOOST SNSBOOST COMPENSATION CONTROL BOOST boost-compensation HBC operational COMP over current protection COMP over current protection −1 V SNSCURHBC COMP 1 kΩ over current regulation 0.5 V COMP ± I... -
Page 45: Hbc Overcurrent Protection
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC Start-up The OverCurrent Regulation is very effective for limiting the output current during start-up. A smaller soft-start capacitor can be chosen which allows faster start-up. The small soft-start capacitor may sometimes result in an excessive output current but the OCR function can slow down the frequency sweep to keep the output current within the limits. -
Page 46: Fig 31. Snscurhbc: Resonant Current Measurement Configurations
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 8.7.4 Current measurement circuits BOOST BOOST C = 1 nF C = 49 nF SNSCURHBC SNSCURHBC 1 kΩ 1 kΩ 0.02 I 001aal455 Fig 31. SNSCURHBC: resonant current measurement configurations 8.7.5 SNSCURHBC layout Because the SNSCURHBC must be able to accurately sense the measurement signal cycle-by-cycle at higher frequencies, it is susceptible to disturbances. -
Page 47: Fig 32. Principle Of Burst Mode Operation With Snsfb And Comparator Levels
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9. Burst mode operation Burst mode operation can be used to improve the efficiency at low output loads. By temporarily interrupting the switching, losses during the idle time are minimized. Because the average power needed for the output is very low, it is easy for the converter to deliver it during a short time of conversion which is a burst. -
Page 48: Fig 33. Burst Mode Application
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 3.2 V kΩ CONTROL SNSFB R BURST1 0.1 V 3.5 V SNSBURST SPIKE HOLDHBC FILTER R BURST2 compensation of burst [μA] voltage level by boost voltage SNSBOOST SNSBOOST [V] TEA1613 001aal457 Fig 33. -
Page 49: Fig 34. Improved Efficiency By Hbc Burst Mode In
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9.3 Advantages of burst mode in HBC The main reason for applying burst mode in a resonant converter is to improve the efficiency at low output power by reducing the power losses. -
Page 50: Fig 36. Increased Efficiency At Low Output Power In Burst Hbc And Pfc (90 W Adapter)
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9.4 Advantages of burst mode for HBC and PFC simultaneously The TEA1613T provides a burst mode system that simultaneously switches the HBC and PFC. In this way, during the burst period, the power is transferred directly from the input to the output. -
Page 51: Fig 38. Simultaneous Hbc And Pfc Burst Mode Operation (And Output Voltage Ripple)
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC [100 V/div] DRAIN.PFC [100 mV /div] OUTPUT HB [100 V/div] 001aal462 Fig 38. Simultaneous HBC and PFC burst mode operation (and output voltage ripple) 9.5 Choice of burst level and divider impedance The power level at which burst mode is activated is set by a resistor divider on SNSFB. -
Page 52: Fig 40. Compensation Current On Snsburst
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC The optimum level for burst mode can be determined experimentally as demonstrated in the following example. Example: The required burst level frequency f = 90 kHz which corresponds to HB(burst) SNSFB = 5.4 V. -
Page 53: Fig 41. Designing The Burst Mode Level Using A Series
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC The amount of compensation needed to obtain a more constant performance, can be determined during a few practical trials. This should give an indication of the target for the total impedance of the divider. -
Page 54: Other Aspects Regarding Snsburst
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC An alternative to the basic circuit construction given in Section 9.5.2 is a construction with an additional series resistance in the connection of SNSBURST (R SBURST This construction allows lower impedance values to be used for the resistor divider while obtaining the same behavior for boost voltage compensation. -
Page 55: Fig 42. Typical Snsfb Voltage-To-Output Power Characteristic Of A Converter Without Burst Mode Functionality
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9.6 Output power - operating frequency characteristics 001aal465 SNSFB Fig 42. Typical SNSFB voltage-to-output power characteristic of a converter without burst mode functionality As can be concluded from Figure 42, the design choice, for a certain SNSFB voltage at which bursting starts, is critical. -
Page 56: Fig 44. Transformer Construction
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9.7 Lower SUPHS in burst During idle time SUPHS is not charged. During normal operation, each time the half-bridge node HB is switched to ground level, the SUPHS capacitor is charged by the bootstrap function of the external diode between SUPHS and SUPREG. -
Page 57: Burst Power Dependent Noise Level
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9.8.2 Burst power dependent noise level The amount of audible noise is strongly related to the amount of energy in each burst. At low output power, the amount of energy is mainly determined by the magnetization current of the resonant converter. -
Page 58: Audible Noise During Mode Transition
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 9.9.4 Audible noise during mode transition Because of the above mentioned interactions, a stable situation can occur during the following operating modes, alternating in time: • Resonant burst with short burst time without PFC burst (time too short to start) •... -
Page 59: Protection Functions
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 10. Protection functions Most protection functions are discussed in the sections of the systems of which they are a part. In the overview Table 3, links to the corresponding places in this document are given. -
Page 60: Fig 45. Snsout Protection
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC A possible reset by external control (for example microcontroller) is available using the SSHBC/EN function. 10.3 SNSOUT/PFCON protection 100 μA 1.5 V COMP 3.5 V SNSOUT/PFCON latched shutdown COMP SUPREG protection timer 2.35 V... -
Page 61: Undervoltage Protection (Uvp) Output
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 10.3.2 UnderVoltage Protection (UVP) output The TEA1613T has undervoltage protection intended for monitoring the HBC output voltage. It is one of the functions that is combined on the SNSOUT/PFCON pin. 10.3.2.1 Auxiliary winding When dealing with a mains insulated converter, the HBC output voltage can be measured via the auxiliary winding of the resonant transformer. -
Page 62: Snsout/Pfcon
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 10.3.3.2 OVP functionality and UVP disabled In some applications it may be required to prevent the activation of the UVP on SNSOUT/PFCON. To achieve this, it is necessary to disable UVP. This can be realized by adding a circuit that prevents the voltage on SNSOUT from dropping below 2.35 V. -
Page 63: Snsout/Pfcon
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 100 μA 1.5 V COMP 3.5 V SNSOUT/PFCON latched shutdown COMP SUPREG = 10.9 V protection timer 2.35 V 8.2 kΩ 1N4148 2.7 kΩ TEA1613 001aal470 Fig 47. Example of disabling the OVP function of SNSOUT/PFCON 10.3.3.4 Both OVP and UVP disabled... -
Page 64: Fig 49. Block Diagram Of The Rcprot Function
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 10.4 Protection timer The TEA1613T has a programmable timer that is used for the timing of several forms of protection. The timer is basically used in two ways: • As a protection timer - the time that an error exists before the system stops operation •... -
Page 65: Fig 51. Rcprot Operating As A Restart Timer
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC is passed when the upper switching level of 4 V has been reached. At that moment, the appropriate protective action is executed, the current source is stopped and RCPROT is discharged by the external resistor. -
Page 66: Dimensioning The Timer Function
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 10.4.3 Dimensioning the timer function The required restart time t determines the time constant t made by the values restart RCPROT of R and C. t – t – restart... -
Page 67: Fig 52. Ground Structure And Current Loops In An Application With Pfc
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 11. Miscellaneous advice and tips 11.1 PCB layout 11.1.1 Grounding SGND + PGND must be connected directly under the IC (in ground plane if possible) to avoid false signal detection by driver current disturbance (see Figure 54). -
Page 68: Fig 53. Ground Layout Example With Star Point At The Boost Capacitor
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 11.1.3 Ground layout example 001aal475 Fig 53. Ground layout example with star point at the boost capacitor 11.1.4 Miscellaneous Connecting SNSCURHBC pin 15 Place a series resistor in the SNSCURHBC connection as close as possible to pin 15. -
Page 69: Fig 54. Pcb Layout Connecting Sgnd, Pgnd, Cfmin, Rfmax And Snscurhbc
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC RFMAX RFMAX RFMAX CFMIN CFMIN CFMIN SUPHS SUPHS SUPHS 001aal476 Fig 54. PCB layout connecting SGND, PGND, CFMIN, RFMAX and SNSCURHBC SNSBURST (pin 3) If a high-impedance value is chosen for the resistor divider on SNSBURST, the connecting tracks of the resistors should be kept short to avoid disturbance (refer to Section 9.5.2... -
Page 70: Hbc Only
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 11.2.1 HBC only A proposal for the setup (temporary additions to the existing application to force operation) and the sequence for disabling/enabling the different functions is given in Figure 55. A moderate (current) load can be applied to the converters output to ascertain the correct functioning. -
Page 71: Fig 55. Start-Up And Debugging Step-By-Step
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC apply non- apply non- protection protection sense voltage sense voltage (if needed) (if needed) SNSOUT/PFCON RCPROT SNSOUT/PFCON RCPROT disable disable SNSFB SSHBC/EN SNSFB SSHBC/EN protection protection enable enable timer timer SNSBURST... -
Page 72: Fig 56. Typical Signals During A Separate Hbc Start-Up For An Increase In V
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC GATEHS GATELS CFMIN = 0 V = 40 V = 60 V boost boost boost HB slope is too slow for proper GATEHS detection -> High frequency GATELS running CFMIN = 100 V... -
Page 73: Fig 57. Example Of A Basic Ic Test Setup On A Single Low Voltage Supply (24 V)
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 12. Application examples and topologies 12.1 Example of IC evaluation and test setup An example of a test/evaluation setup is provided in Figure 57. This setup can be used to: •... -
Page 74: (Part 1)
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Page 75: Fig 58. Example Of A 250 W Lcd-Tv Application
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Page 76: Fig 59. Example Of A 250 W Lcd-Tv Application
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Page 78: Abbreviations
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 13. Abbreviations Table 4. Abbreviations Acronym Description Adaptive Dead Time Bipolar CMOS DMOS Capacitive Mode Regulation ElectroMagnetic Compatibility ElectroMagnetic Interference (or Immunity) Half-Bridge HalfBridge Converter (or Controller) High-Frequency Protection High Voltage... -
Page 79: Legal Information
Notwithstanding any damages that customer might incur for any reason whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards In no event shall NXP Semiconductors, its affiliates or their suppliers be liable customer for the products described herein shall be limited in accordance to customer for any special, indirect, consequential, punitive or incidental with the Terms and conditions of commercial sale of NXP Semiconductors. -
Page 80: Table Of Contents
AN10907 NXP Semiconductors TEA1613T resonant power supply control IC 15. Tables Table 1. Pinning overview ......6 Table 3. - Page 81 AN10907 NXP Semiconductors TEA1613T resonant power supply control IC Fig 61. Overview of the functions in the circuit diagram of the TEA1613T application ....77 17. Contents Introduction .
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Page 82: Contents
‘Legal information’. © NXP B.V. 2010. All rights reserved. For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 28 December 2010 Document identifier: AN10907...
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