UM10384 - NXP Semiconductors
Contents
1. 0 00 Circuit diagram 0 cece eee eee Board connection 2000seeeeee Circuit considerations Preheat time selection Preheat current selection Transformer selection 00005 Charge pump and feedback capacitor SCIECHON ima eee eee e Bak ed ee atts Input filter selection 0000 Burner filament current selection when a low light output is required Measurements 2000e eee eens l transformer and V burner under maximum and minimum light output Transformer specification Electrical characteristics Core and bobbin 05 Bill Of Materials BOM 55 Appendix PCB layout Legal information 00eeeeeenee Definitions 0 0 cee ee eee Disclaimer S ee cc ee oe ei pe ee Rk Bee Trademarks 0 0 cee CONTENTS 6 og Giese ene so eee See doe Please be aware that important notices concerning this document and the product s described herein have been included in section Legal information NXP B V 2010 For more information please visit http Awww nxp com For sales office addresses please send an email to salesaddresses nxp com All rights reserved Date of release 20 July 2010 Document identifier UM103842. NXP Semiconductors Right to make changes NXP Semiconductors reserves the right to make changes to information published in this document including without limitation specifications and product descriptions at any time and without notice This document supersedes and replaces all information supplied prior to the publication hereof Suitability for use NXP Semiconductors products are not designed authorized or warranted to be suitable for use in life support life critical or safety critical systems or equipment nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury death or severe property or environmental damage NXP Semiconductors accepts no liability for inclusion and or use of NXP Semiconductors products in such equipment or applications and therefore such inclusion and or use is at the customer s own risk Applications Applications that are described herein for any of these products are for illustrative purposes only NXP Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification Customers are responsible for the design and operation of their applications and products using NXP Semiconductors products and NXP Semiconductors accepts no liability for any assistance with applications or customer product design It is customer s sole responsibility
3. cannot be dimmed with a standard phase cut type of dimmer All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 3 of 15 NXP Semiconductors U M1 0384 230 V dimmable reference board This is because in TRIAC dimming not only does the lamp current vary based on the TRIAC position but also the supply voltage variation Typically the TRIAC conducts once it has been triggered and exceeds its latching current and does not conduct when the current is less than the holding current The dimmer works fine with a resistive load such as an incandescent lamp The TRIAC can be triggered at any timing of the sinusoidal voltage AC line input and can be kept in conduction state until it reaches zero line voltage The dimmer solution is based on the UBA2028 which can be designed into a ballast application such that the load is dimmable with a standard phase cut type of dimmer The board is designed to drive a 18 W CFL burner for 230 V AC mains input The 230 V AC reference board it consists of an AC mains input filter a rectifier a TRIAC dimmer position detector the lamp current detector half bridge resonant tank and the charge pump circuit UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 4 0f 15 NXP Semiconductors U
4. to determine whether the NXP Semiconductors product is suitable and fit for the customer s applications and products planned as well as for the planned application and use of customer s third party customer s Customers should provide appropriate design and operating safeguards to minimize the risks associated with their applications and products UM10384 All information provided in this document is subject to legal disclaimers NXP Semiconductors does not accept any liability related to any default damage costs or problem which is based on any weakness or default in the customer s applications or products or the application or use by customer s third party customer s Customer is responsible for doing all necessary testing for the customer s applications and products using NXP Semiconductors products in order to avoid a default of the applications and the products or of the application or use by customer s third party customer s NXP does not accept any liability in this respect Export control This document as well as the item s described herein may be subject to export control regulations Export might require a prior authorization from national authorities Evaluation products This product is provided on an as is and with all faults basis for evaluation purposes only NXP Semiconductors its affiliates and their suppliers expressly disclaim all warranties whether express implied or statutory includi
5. 30 V dimmable reference board 10 1 Definitions Draft The document is a draft version only The content is still under internal review and subject to formal approval which may result in modifications or additions NXP Semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information 10 2 Disclaimers Limited warranty and liability Information in this document is believed to be accurate and reliable However NXP Semiconductors does not give any representations or warranties expressed or implied as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information In no event shall NXP Semiconductors be liable for any indirect incidental punitive special or consequential damages including without limitation lost profits lost savings business interruption costs related to the removal or replacement of any products or rework charges whether or not such damages are based on tort including negligence warranty breach of contract or any other legal theory Notwithstanding any damages that customer might incur for any reason whatsoever NXP Semiconductors aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the Terms and conditions of commercial sale of
6. M10384 3 Circuit diagram 230 V dimmable reference board The circuit diagram is shown in Figure 1 c21 1nF 1000 V R8 R10 560 kQ 560 kQ R16 c6 200 kQ 100 nF D3 D4 T P P T L3 FR107 FR107 c8 c17 It T 2 5 mH Ik 100 nF 47 nF CD1 C14 D5 400V tour In 1N4148 R1 400 V 1000y c16 220 kQ l 3 9 nF 1000 V c15 D9 hs 1 nF 12V 7 R2 220 kQ L3A L3B UBA2028 1 8 uH 3 1 8 uH c19 c18 220 nF 220 nF pe D Be 100V 100V Kt ef 7 5 AV IN4148 33kQ ca R3 R4 R5 T 47uF 24kQ 22k2 33kQ 4 R7 T 33 kQ IN4007 T 220 nF Dia Dip R16 c12 won 1kQ A Did lt J Dic R T R13 D7 cxt K ji Ve De FR107 a7 nF 400V c22 6 8 mH 470 pF IN4148 C20 D6 cx2 470 nF FR107 __ H Ret Re 47 nF 400 V n 15Q 1W 150 1W R11 479 1W T fe g L 230VAC N N14aaagi7 Fig 1 UBA2028 230 V AC circuit diagram UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manu al Rev 03 20 July 2010 5 of 15 NXP Semiconductors U M1 0384 230 V dimmable reference board 4 Board conn
7. UM10384 UBA2028 CFL 18 W 230 V dimmable reference board Rev 03 20 July 2010 User manual Document information Info Content Keywords UBA2028 CFL TRIAC dimmable charge pump Abstract This document is a user manual for the 18 W 230 V mains dimmable CFL reference board based on the NXP Semiconductors UBA2028 NXP Semiconductors U M1 0384 230 V dimmable reference board Revision history Rev Date Description 03 20100720 Third issue Modifications e All illustrations updated to revised AQL standard e Section 10 Legal information updated 02 20100215 Second issue 01 20091014 First issue Contact information For more information please visit http www nxp com For sales office addresses please send an email to salesaddresses nxp com UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 2 of 15 NXP Semiconductors U M1 0384 230 V dimmable reference board 1 Introduction WARNING Lethal voltage and fire ignition hazard The non insulated high voltages that are present when operating this product constitute a risk of electric shock personal injury death and or ignition of fire This product is intended for evaluation purposes only It shall be operated in a designated test area by personnel that is qualified according to local requirements and labor la
8. able burner under maximum and minimum light outputs From these results a small voltage change of the burner can be seen and as the transformer current is less the MOSFET will not be overloaded Fig 4 P3 rms C4 P4 Measure P1 rms C1 P2 freq C4 P5 P6 value 93 4 V 50 477 kHz 204 mV status v a v l transformer and V burner under maximum light output 019aaa328 UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 9 of 15 NXP Semiconductors U M1 0384 230 V dimmable reference board t Measure P1 rms C1 P2 freq C4 s P3 rms C4 P4 P5 P6 value 158 5V 52 564 kHz 7 1 mV a a 019aaa329 Fig 5 l transformer and V burner under minimum light output 7 Transformer specification Figure 6 shows the transformer schematic Transformer bottom view 4 5 3 6 2 7 1 8 019aaa331 L3 2 5 mH L3A 1 8 uH L3B 1 8 uH Fig 6 Transformer schematic 7 1 Electrical characteristics Table 2 Inductance Section Inductance Resistor Primary 2 5 mH 7Q Secondary 1 8 uH 180 mQ UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 10 of 15 NXP Semiconductors U M1 0384 230 V dimmable
9. aluation products The non insulated high voltages that are present when operating this product constitute a risk of electric shock personal injury death and or ignition of fire This product is intended for evaluation purposes only It shall be operated in a designated test area by personnel that is qualified according to local requirements and labor laws to work with non insulated mains voltages and high voltage circuits The product does not comply with IEC 60950 based national or regional safety standards NXP Semiconductors does not accept any liability for damages incurred due to inappropriate use of this product or related to non insulated high voltages Any use of this product is at customer s own risk and liability The customer shall fully indemnify and hold harmless NXP Semiconductors from any liability damages and claims resulting from the use of the product 10 3 Trademarks Notice All referenced brands product names service names and trademarks are the property of their respective owners NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 14 of 15 NXP Semiconductors UM10384 11 Contents 230 V dimmable reference board 2 1 2 2 2 2 1 5 1 5 2 5 3 5 4 5 5 5 6 10 1 10 2 10 3 11 Introduction 0 00 cece ees FO ATUNCS si cece ew ies a Raxtare ee tiara IC description 0 0 eee eee Board description 0 055 Specification
10. ard Designator R16 Re Ret C4 C6 C7 C8 c9 C10 C11 C12 C14 C15 C18 C19 C20 C22 D2 D5 D8 D9 De Part type 200 KQ 150 1W 150 1W 4 7 uF 50 V 100 nF 50 V 4 7 uF 50 V 100 nF 50 V 220 nF 50 V 220 nF 50 V 100 pF 50 V 10 nF 100 V 1nF 1kV 1 nF 50 V 220 nF 100 V 220 nF 100 V 470 nF 50 V 470 pF 50 V BZV55 5 1 V 1N4148 1N4148 BZV55 12 V 1N4148 EF20 CFL 18 W 150 V RMS UBA2028T Description Remarks resistor connected to pin 16 resistor resistor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor capacitor Zener diode diode diode Zener diode diode EFL IC NXP Semiconductors UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 12 of 15 NXP Semiconductors U M1 0384 230 V dimmable reference board 9 Appendix PCB layout Figure 7 and Figure 8 show the layout of the PCB 019aaa326 Fig 7 UBA2028 230 V AC reference board top layer 019aaa325 Fig 8 UBA2028 230 V AC reference board bottom layer UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 13 of 15 NXP Semiconductors UM10384 10 Legal information 2
11. can be adjusted by L3A L8B C19 C18 and R9 Reducing the value of R9 will increase filament preheat current vice versa For good ignition it is recommended t to maintain lamp preheat current according to the lamp specification The number of turns in the auxiliary cathode inductor windings of the output inductor L3 should be chosen to provide sufficient preheat The lamp filament cathode resistance over the range of dimming levels must be between 3 times and 5 5 times the resistance when cold Transformer selection The transformer L3 for a dimmable application needs to supply enough current during low light output to maintain a constant mains derived DC voltage The primary inductance is designed to allow a high peak ignition current without saturation To minimize losses in the inductor multi stranded wire should be used in combination with ferrite cores of sufficiently good quality For this reference board the primary inductance is 2 5 mH and the secondary inductance used for inductive preheating is 1 8 uH A simplification for inductor selection would be for a lamp with a 10 higher power simply reduce the coil value by 10 Charge pump and feedback capacitor selection The charge pump capacitor is important for CFL dimming without the charge pump capacitor the lamp could not be dimmed the charge pump has two function one is to pump power to the electrical capacitance at low dimming positions to prevent capacitive mode another is t
12. ection The 230 V AC mains input connection and four CFL connections for the burner is connected as shown in Figure 2 A resistor of 4 7 Q is placed in series with the 230 V mains input 230 V AC O CFL g 019aaa330 Fig 2 230 V AC version of UBA2028 mains dimmable CFL reference board The 230 V AC mains dimmable CFL reference board based on the UBA 2028 consists of both main and plug in boards The plug in board can either be connected to the main board by a socket connector or can be soldered directly The AC mains input and burner connections are indicated in Figure 1 5 Circuit considerations UM10384 5 1 Preheat time selection Preheat time can be adjusted by the capacitor C9 CT pin and the resistor R7 IREF pin R7 could be selected between 2 5 V 65 uA 38 kQ and 2 5 V 95 pA 26 KQ the values 65 uA and 95 pA refer to the UBA2028 data sheet Usually R7 is selected to be 33 kQ Because R7 also defines fmin it is advised to change C9 to adjust the preheat time The preheat time equation is as follows C9 R7 T _ x s P 330x 10 33x 10 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 6 of 15 NXP Semiconductors U M1 0384 5 2 5 3 5 4 5 5 5 6 UM10384 230 V dimmable reference board Preheat current selection Preheat current
13. ng but not limited to the implied warranties of non infringement merchantability and fitness for a particular purpose The entire risk as to the quality or arising out of the use or performance of this product remains with customer In no event shall NXP Semiconductors its affiliates or their suppliers be liable to customer for any special indirect consequential punitive or incidental damages including without limitation damages for loss of business business interruption loss of use loss of data or information and the like arising out the use of or inability to use the product whether or not based on tort including negligence strict liability breach of contract breach of warranty or any other theory even if advised of the possibility of such damages Notwithstanding any damages that customer might incur for any reason whatsoever including without limitation all damages referenced above and all direct or general damages the entire liability of NXP Semiconductors its affiliates and their suppliers and customer s exclusive remedy for all of the foregoing shall be limited to actual damages incurred by customer based on reasonable reliance up to the greater of the amount actually paid by customer for the product or five dollars US 5 00 The foregoing limitations exclusions and disclaimers shall apply to the maximum extent permitted by applicable law even if any remedy fails of its essential purpose Safety of high voltage ev
14. o draw current from the dimmer even for voltages approaching the zero crossing level as this is needed to maintain the hold current for TRIAC operation Input filter selection Input filter components CX2 CX1 and L1 need select to filter output noise of dimmer to supply a smooth voltage to CSP pin also it needs avoid resonance of dimmer and the system during whole dimming range The input filter also need avoid EMI to interference the input power supply Burner filament current selection when a low light output is required During low light output because of very low current through burner the filament temperature will go down Under this condition the electron emission temperature will not be enough and not enough electrons will be emitted So L8A L3B C19 and C18 need to support enough current normally around 200 mA RMS to the filament in order to maintain filament temperature during low light output All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 7 of 15 NXP Semiconductors U M1 0384 230 V dimmable reference board 6 Measurements Table 1 Dimming measurements using Norma D4000 power analyzer Norma analyzer measurement UBA2028 no dimming UBA2028 minimum dimming V V RMS 230 100 l mA RMS 155 105 PACT W 22 7 CFi 4 2 9 TDI 0 77 0 92 PF 0 62 0 65 For the UBA2028 with no dimming measu
15. reference board 7 2 Core and bobbin e Core size EF20 e Core material Philips 3C85 Siemens N27 or equivalent e Gap length 1 0 mm 8 Bill Of Materials BOM The components used for the reference board are given in Table 3 Table 3 BOM Designator Part type Description Remarks R11 4 7 Q 1 W fusistor fusistor resistor fusistor CD1 10 uF 400 V electrical capacitance high temperature electrical 105 C C21 1 nF 1000 V capacitance charge pump capacitor CX1 47 nF 400 V CBB capacitance CX2 47 nF 400 V CBB capacitance C17 47 nF 400 V CBB capacitance C16 3 9 nF 1000 V CBB capacitance L1 6 8 mH R 12Q filter inductor L3 2 5 mH lamp inductor EF20 core L3A 1 8 uH filament preheat inductor EF20 core L3B 1 8 uH filament preheat inductor EF20 core Diato Did 1N4007 diode D3 FR107 diode D4 FR107 diode D6 FR107 diode D7 FR107 diode SMD components R1 220 KQ resistor R2 220 KQ resistor R3 24 KQ resistor R4 22 KQ resistor R5 33 KQ resistor R6 33 KQ resistor R7 33 KQ resistor R8 560 KQ resistor R9 1 59 2 W resistor R10 560 KQ resistor R13 1 KQ resistor R14 3 MQ resistor R15 2 40 resistor R16 1 KQ resistor connected to pin CSW UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 11 of 15 NXP Semiconductors UM10384 Table 3 BOM continued 230 V dimmable reference bo
16. rements the Norma D4000 power analyzer was placed between the lamp and the mains and no TRIAC dimmer was used For the UBA2028 minimum dimming measurements the Norma D4000 power analyzer was placed between the TRIAC dimmer and the lamp in order to measure PACT at minimum dimming level amp RBW 9kHz Att 10 dB MT 1s w 1 MHz PREAMP OFF 10 MHz EN55015Q EN55015A 0 150 kHz 30 MHz 019aaa327 Fig 3 EMI measurement UM10384 All information provided in this document is subject to legal disclaimers NXP B V 2010 All rights reserved User manual Rev 03 20 July 2010 8 of 15 NXP Semiconductors UM10384 6 1 output 230 V dimmable reference board l transformer and V burner under maximum and minimum light For dimmable applications the burner selection is very important When the burner is adjusted to a low light output the burner voltage will go high and the main voltage will go down due to the action of the TRIAC Under these conditions the resonant inductance needs a support current in order to maintain a smooth main DC voltage for the high voltage burner When the high light output and the burner voltage change is not excessive when dimming to a low light output the burner should have a voltage of approximately 100 V Figure 4 and Figure 5 show the measured waves of the I transformer and V burner with a suit
17. ws to work with non insulated mains voltages and high voltage circuits This product shall never be operated unattended 2 Features The UBA2028 230 V mains dimmable reference board is a Compact Fluorescent Lamp CFL driver for a 18 W CFL burner The maximum input power is 18 W and it can be dimmed using a TRIAC dimmer The dimming range reaches down to 10 of light output UM10384 2 1 2 2 2 2 1 IC description UBA2028 is a monolithic integrated circuit for driving electronically ballasted fluorescent lamps The circuit is made in a 650 V Bipolar CMOS DMOS BCD power logic process It provides the drive function for the two discrete power MOSFETs Besides the drive function the IC also includes the level shift circuit the oscillator function a lamp voltage monitor a current control function a timer function and protections The IC includes e Adjustable preheat time e Adjustable preheat current e Current controlled operating e Single ignition attempt e Adaptive non overlap time control e Integrated high voltage level shift function e Power down function e Protection against lamp failures or lamp removal e Capacitive mode protection Board description Specification This user manual describes the design of a 230 V mains dimmable CFL ballast solution that may be employed in an already existing TRIAC based incandescent dimmer setup The disadvantage of normal electronic ballasts is that they
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