Infineon XDPL8218 Скачать руководство пользователя страница 34 | Manualshive

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Infineon XDPL8218 Скачать руководство пользователя страница 34

Design Guide

34 of 48

V 1.0

2018-06-06

XDPL8218 design guide

For high power factor flyback converter with constant voltage output

Parameter configuration list, set-up and procedures

17.2

Parameter configuration set-up

The tools needed for on-board XDPL8218 parameter configuration are listed in

Table 10

Tools needed for XDPL8218 parameter configuration

Tool type Tool name

Description

Ordering/Download link

Ordering/Download
content

Hardware

.dp Interface
Gen2

.dp Interface
board

IF-BOARD.DP-GEN2

.dp Interface Gen2 x 1
USB cable x 1

Software

.dp Vision

GUI for
parameter
configuration
of all .dp
products

Note:
Please install .dp Vision
before running the
XDPL8218 .dp Vision folder
setup file shown below.

Latest version of the .dp
Vision installer (*.exe)

XDPL8218
parameter
csv file

XDPL8218
parameter
configuration
file

XDPL8218 40W reference
board homepage

Note:
Please download the zipped
package which contains the
.dp Vision folder setup file
(*.msi)

Latest version of .dp Vision
folder setup file (*.msi),
which installs the following

XDPL8218 40 W reference
design engineering report
(*.pdf) and parameter
configuration file (*.csv),
including images for the
configuration file.

XDPL8218 design guide
(*.pdf)

shows the hardware set-up needed for the on-board XDPL8218 parameter configuration.

Note:

Please ensure the board is not supplied with any voltage before connecting the programmable cable
to the target XDPL8218 board. For parameter configuration on the XDPL8218 40 W reference design,
please connect the programming cable to its configuration connector X2.

Figure 22

Hardware set-up for on-board XDPL8218 parameter configuration

USB
Cable
to PC

.dp Interface Gen2

Programming cable

(included with the 40 W

reference design)

Connect to target

XDPL8218

Vcc

UART

GND

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Содержание XDPL8218

Страница 1: ...esign 6 4 Flyback MOSFET and secondary main output diode selection 8 5 CS resistor and GD pin related design 10 6 MOSFET maximum current cycle by cycle limit and start up phase design 11 7 HV pin rela...

Страница 2: ...list 33 17 2 Parameter configuration set up 34 17 3 Parameter configuration procedures 35 18 Fine tuning guide 38 18 1 Input voltage sensing parameter fine tuning 38 18 2 QR valley switching paramete...

Страница 3: ...r linear regulator XDPL8218 comes in a PG DSO 8 package with eight pins as shown in the datasheet 1 The main functions of each pin are shown in Table 1 Table 1 XDPL8218 pins assignment Pin Symbol Type...

Страница 4: ...ables a lower Bill of Materials BOM and rapid engineering changes without the need for complex component design iterations Note By default the configurable parameters of a new XDPL8218 chip from Infin...

Страница 5: ...ary side regulated CV output set point Vout setpoint 54 V Steady state output load current Iout 0 800 mA Steady state full load output power Pout full 43 2 W Minimum efficiency at Pout full min at P o...

Страница 6: ...be around 30 percent to 45 percent of VAC max as a rule of thumb In this design example VAC max is 305 Vrms so we simply assume Vspike FET as an absolute number of 100 V which is approximately 33 perc...

Страница 7: ...tart up and also to be able to deliver peak gate drive voltage VGD peak of 12 V with high enough primary auxiliary winding VCC supply during steady state the minimum primary auxiliary winding demagnet...

Страница 8: ...ith exceptional ease of use while still not compromising on price performance ratio The 700 V and 800 V CoolMOSTM P7 series have been designed for flyback and could also be used in PFC topologies MOSF...

Страница 9: ...sink for the MOSFET IPD80R900P7 with TO 252 DPAK package is selected Table 3 800 V CoolMOSTM P7 selection table For the secondary main output diode selection it is necessary to first estimate the maxi...

Страница 10: ...is to damp the gate rise oscillaton and RGS is to ensure the MOSFET remains in an off state when AC input is applied with the IC not being activated yet RG 10 and RGS 20 k are selected in this design...

Страница 11: ...a controller operating state which is entered after the start up phase to regulate the output based on the FB voltage mapping as shown in Figure 8 Note The estimated input voltage Vin used for VOCP1 V...

Страница 12: ...2 6062 52 103 1 2 326 1 3 2 54 0 7 Note VOCP1 at V in high parameter minimum configurable value is fixed as 0 34 V If the calculation result of equation 18 is below 0 34 V parameter setting of VOCP1 a...

Страница 13: ...se CS pin maximum voltage limit and nss is the parameter for the number of soft start steps The soft start phase CS pin maximum voltage limit is increased by Vstart OCP1 nss 1 after each soft start st...

Страница 14: ...HV max is defined and calculated as 1 2 1 22 Where VAC min rect avg is the average value of the rectified VAC min while VVCCON max is the maximum VCC turn on voltage threshold of 22 V and IHV min avg...

Страница 15: ...time needed to charge the output voltage to the start up output UVP level VoutUV start or higher Based on the considerations above VCC capacitor value and IC parameter setting of CVCC 22 F are select...

Страница 16: ...g demagnetization voltage when output voltage is VoutUV Va UV is recommended to be between 9 5 V and 10 5 V So taking Va UV 10 1 V 10 1 10 3 0 7 To prevent the regulated mode output UVP from being tri...

Страница 17: ...ective to the the sampled signal accuracy sampling delay indirect sensing delay e g output voltage cannot be estimated near AC input phase angle of 0 degrees and 180 degrees and blanking time the outp...

Страница 18: ...er RDC filter Figure 13 CDC filter and RDC filter across the DC link bus voltage To compensate for the input current displacement caused by the CDC filter the XDPL8218 enhanced Power Factor Correction...

Страница 19: ...which is recommended to be configured as Vin high Hence Vin start max 326 Vrms is selected in this design example VinOV parameter refers to the input OVP level setting which is recommended to be 107...

Страница 20: ...important to select the correct RZCD 1 and RZCD 2 values which can cover the necessary measurement range not only for normal conditions but also for protected conditions The recommended minimum ZCD s...

Страница 21: ...nce for good Vin estimation via the ZCD pin especially at input UVP level VinUV such a ripple effect should be minimized and compensated with proper configuration of ton max at V in low and Rin parame...

Страница 22: ...For Vsupply SSR noise decoupling in this design example a ceramic capacitor of CVDD 100 nF with low ESR is selected and placed near the op amp VDD pin As shown in Figure 16 the SSR op amp non inverti...

Страница 23: ...ABM minimum on time parameter and ABM is the estimated power efficiency in ABM Take fburst 130 Hz ton min ABM 1 s and assume ABM 65 percent 544 10 6 54 54 2 5 3502 1 10 6 2 130 65 146 15 Based on the...

Страница 24: ...0 0 7 54 0 7 3 10 0 5 1 1 0 5 2 428 0 3 16 98 Based on the above Rbias opto Ropto 16 k is selected in this design example Rbias opto is recommended to be at least 10 times lower than Ropto so Rbias op...

Страница 25: ...Design Guide 25 of 48 V 1 0 2018 06 06 XDPL8218 design guide For high power factor flyback converter with constant voltage output Secondary side regulation FB circuit design 1 2 470 10 9 5 8...

Страница 26: ...ver the digital notch filter output has not been taken as VFB filtered The recommended Nquality and nnotch blank parameter configuration from Table 5 is selected in this design example In ABM line syn...

Страница 27: ...x 136 kHz and fine tune it later if necessary The minimum switching frequency parameter fsw min is not configurable and is fixed as 20 kHz 14 3 ABM FB voltage sensing and control In ABM the switching...

Страница 28: ...x fsw min fburst 20kHz typ Figure 19 Multi mode operation mapping based on filtered FB voltage VFB filtered When VFB filtered is the same as or higher than the VFB max map parameter the power transfer...

Страница 29: ...n Parameter name Recommended value Unit VFB max map 2 0 V VFB min VCE sat refer to optocoupler datasheet V tABM blank 6 5 Ms 14 5 FB voltage maximum limit ramp Whenever the regulated mode is entered t...

Страница 30: ...If Tcritical is configured above 119 C the maximum switching frequency parameter fsw max cannot be configured above 136 4 kHz The protection reaction is fixed as auto restart while the maximum juncti...

Страница 31: ...with constant voltage output Other protection related parameters 15 5 Debug mode The parameter setting of DebugMode Disabled is selected in this design example The DebugMode parameter should only be...

Страница 32: ...citor VCC noise decoupling capacitor CVCCdecouple ZCD pin filter capacitor CZCD and FB pin filter capacitor CFB near to its designated pin and the GND pin of the controller c Apply the following guide...

Страница 33: ...meter configuration set up and procedures please refer to Section 17 2 and Section 17 3 For safety purposes before powering up the board it is important to ensure that the configured IC parameter valu...

Страница 34: ...r csv file XDPL8218 parameter configuration file XDPL8218 40W reference board homepage Note Please download the zipped package which contains the dp Vision folder setup file msi Latest version of dp V...

Страница 35: ...18 parameter configuration file csv in dp Vision After opening the parameter csv file a list of configurable parameters with default values based on the reference board design will be shown see the bo...

Страница 36: ...ilable on the target IC In that case the user will have to replace the XDPL8218 chip with a new one in order to burn the configuration Table 11 shows the recommended procedures for using the burn conf...

Страница 37: ...OK based on Figure 22 III If necessary change any parameter value see example in Figure 24 Otherwise proceed to step IV IV Click to supply power and establish a connection to the target XDPL8218 After...

Страница 38: ...To improve the input voltage estimation accuracy Rin parameter fine tuning is important for the IC to estimate the correct Vin peak by compensating such switching frequency ripples which appears in II...

Страница 39: ...Where Rds on 25 C is the MOSFET drain source on resistance at 25 C and Rdc pri winding is the primary main winding DC resistance Calculation example based on 40 W reference design 0 5 10 73 7 59 0 9 0...

Страница 40: ...ut voltage e g 120 Vrms and full load output If the board cannot be powered up please refer to Section 19 for the debugging guide III Capture the waveform with a 1 ms time base and zoom into the volta...

Страница 41: ...ter placed after the bridge rectifier If necessary fine tune the CEMI parameter using the test configuration function in dp Vision to achieve the optimized power factor and iTHD For example with the X...

Страница 42: ...rt time of a protection with auto restart time is typically longer than the configured tauto restart value due to an additional time of tVCCON recharge needed for VCC recharging to VCC turn on thresho...

Страница 43: ...ignal switching restarts after every VCC recharge to VCC turn on threshold 20 5 V typ See an example in Figure 28 This scenario means the VCC Under Voltage Lockout UVLO protection has been triggered w...

Страница 44: ...id this please burn the first full set of parameters to the XDPL8218 chip Figure 29 Scenario IV waveform example configuration mode entered with no parameter at start up Scenario V VCC stays constant...

Страница 45: ...nF soldered across the UART pin and ground for noise decoupling III Click to supply power and establish connection to the target XDPL8218 After this step the XDPL8218 will be in configuration mode an...

Страница 46: ...Guide 46 of 48 V 1 0 2018 06 06 XDPL8218 design guide For high power factor flyback converter with constant voltage output References 20 References 1 XDPL8218 datasheet 2 REF XDPL8218 U40W engineering...

Страница 47: ...1 0 2018 06 06 XDPL8218 design guide For high power factor flyback converter with constant voltage output References Revision history Document version Date of release Description of changes V 1 0 201...

Страница 48: ...intellectual property rights of any third party with respect to any and all information given in this application note The data contained in this document is exclusively intended for technically train...

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