Texas Instruments UCC28610EVM-474 Скачать руководство пользователя страница 14 | Manualshive

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FB CURRENT vs. DRV CURRENT

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FB CURRENT vs. SWITCHING FREQUENCY

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Performance Data and Typical Characteristic Curves

Figure 8. DRV Current as a Function of FB Current

Figure 9. Switching Frequency as a Function of FB Current

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UCC28610EVM-474 25-W Universal Off-Line Flyback Converter

SLUU383B

–

November 2009

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Revised May 2011

Submit Documentation Feedback

Copyright

©

2009

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2011, Texas Instruments Incorporated

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Содержание UCC28610EVM-474

Страница 1: ...Using the UCC28610EVM 474 User s Guide Literature Number SLUU383B November 2009 Revised May 2011 ...

Страница 2: ... regulated output voltage of 12 VDC at a load current of up to 2 1 A The converter will transition through three operating modes green mode GM amplitude modulation AM and frequency modulation FM depending upon the power level and FB current In FM mode the on time is fixed resulting in a fixed peak primary current at each cycle and the switching frequency is increased with increasing load In AM mod...

Страница 3: ...lows Fully Integrated Current Control Without an External Sense Resistor Multiple Operating Modes for Optimum Efficiency Over entire Operating Range Over Current Protection to Limit RMS Input and Output Current Timed overload with Shutdown Retry Response Opto Less Output Overload Protection CAUTION High voltage levels are present on the evaluation module whenever it is energized Proper precautions...

Страница 4: ...UT Output current VIN min to max 0 2 1 A IOCP Output over current VIN max 3 A inception point VOVP Output OVP IOUT min to max 16 V Transient response voltage IOUT min to max 500 mV over shoot SYSTEM CHARACTERISTICS fSW Switching frequency 26 3 140 4 kHz hPEAK Peak efficiency VIN 115 VRMS IOUT 1 05 A 85 7 No load power consumption VIN 115 VRMS 67 mW VIN 230 VRMS 107 Operating temperature VIN min to...

Страница 5: ...or the schematic list of materials and board layout The EVM revision code can be found on the lower right corner of the top side of the board as shown in Figure 1 Figure 1 Placement of Revision Code for the Evaluation Module 5 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorpo...

Страница 6: ...ment www ti com Figure 2 UCC28610EVM 474 Schematic 6 UCC28610EVM 474 25 W Universal Off Line Flyback Converter SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 7: ...try is composed of gate drive resistor R10 used for damping oscillations during turn on Resistor R16 and diode D8 are required to provide a current path at turn off because the gate is shorted to the source of the HV MOSFET during each switching cycle For circuits that experience high ringing on VGG at turn off R16 can be replaced with a ferrite bead Capacitors C8 and C10 are decoupling capacitors...

Страница 8: ...apable of sinking 0 to 3 ADC at 12 VDC shall be used For highest accuracy VOUT can be monitored by connecting a DC voltmeter DMM V1 directly across the Vout and Vout terminals as shown in Figure 3 and Figure 4 A DC current meter DMM A1 should be placed in series with the electronic load for accurate output current measurements Power Meter The power analyzer shall be capable of measuring low input ...

Страница 9: ...VM Test Set Up 5 2 Recommended Test Set Up for Operation Without a Load Figure 3 UCC28610EVM 474 Recommended Test Set Up Without a Load 5 3 Recommended Test Set Up for Operation With a Load Figure 4 UCC28610EVM 474 Recommended Test Set Up With a Load 9 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011...

Страница 10: ...ary side power ground TP4 QGND Primary side signal ground TP5 LOOP Loop injection point EVM output TP6 LOOP Loop injection point J1 1 Neutral Neutral input from the AC source J1 2 Earth Earth reference from the AC source J1 3 AC Line Line input from AC source J2 1 Vout Positive output terminal of the EVM to the load J2 2 Vout Return connection of the EVM output to the load 10 UCC28610EVM 474 25 W ...

Страница 11: ...and 265 VAC 3 Turn on the AC source 4 Monitor the output voltage on DMM V1 5 Monitor the output current on DMM A1 6 The EVM is now ready for testing 6 2 No Load Power Consumption 1 Use the test set up shown in Figure 3 a Set the power analyzer to external shunt mode b Set the appropriate current scale factor for using an external shunt on the power analyzer A 10 Ω shunt scales at 10 000 mV A for t...

Страница 12: ...ed before handling the EVM 6 4 Output Voltage Ripple 1 Expose the ground barrel of the scope probe Insert the tip of the probe into the plated via located on the Vout pad of the EVM TP1 and lean the probe so that the exposed ground barrel is resting on the test point on the Vout pad of the EVM TP2 for a tip and barrel measurement as shown in the example depicted in Figure 5 2 Apply power to the EV...

Страница 13: ... t P o w e r m W www ti com Performance Data and Typical Characteristic Curves 7 Performance Data and Typical Characteristic Curves Figure 6 through Figure 23 present typical performance curves for the UCC28610EVM 474 Figure 6 Efficiency as a Function of Load Current and Input Voltage Figure 7 No Load Input Power as a Function of Input Voltage 13 SLUU383B November 2009 Revised May 2011 UCC28610EVM...

Страница 14: ...0 200 250 300 350 IFB uA F s w k H z 85Vac 115Vac 230Vac 265Vac Performance Data and Typical Characteristic Curves www ti com Figure 8 DRV Current as a Function of FB Current Figure 9 Switching Frequency as a Function of FB Current 14 UCC28610EVM 474 25 W Universal Off Line Flyback Converter SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments...

Страница 15: ... as a Function of Load Current and Line Voltage Note the shutdown retry threshold for each line voltage Figure 11 Start Up Waveform Input voltage 115 VAC full load Ch 1 bulk input voltage 100 V div Ch 2 VGG 10 V div Ch 3 VDD 10V div Ch 4 DRV 10V div 15 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011...

Страница 16: ...SFET 100 V div Ch 3 ZCD 5 V div Figure 13 AM Mode Switching Cycle Waveform Input voltage 85 VAC 0 3 A load fSW 28 2 kHz Ch 1 IDRV 500 mA div IDRV 1 1 A Ch 2 Drain of HV MOSFET 100 V div Ch 3 ZCD 5 V div Ch 4 VDD 10 V div 16 UCC28610EVM 474 25 W Universal Off Line Flyback Converter SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporat...

Страница 17: ...40 mA Ch 2 Drain of HV MOSFET 100 V div Ch 3 ZCD 5 V div Ch 4 VDD 10 V div Figure 15 Ripple on VGG and VDD During Green Mode Operation Ch 3 VGG AC coupled 2 V div Ch 4 VDD AC coupled 200 mV div 17 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 18: ...o load Ch 2 VOUT AC coupled 20 mV div Figure 17 Output Voltage Ripple During Frequency Modulation Mode Input voltage 85 VAC full load Ch 2 VOUT AC coupled 20 mV div 18 UCC28610EVM 474 25 W Universal Off Line Flyback Converter SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 19: ...19 Brown Out Protection MOT shutdown retry response triggered at full load when input voltage dropped to 72 4 VAC Note the 750 ms tRETRY Ch 1 IDRV Ch 3 VDD 10 V div Ch 4 VGG 10 V div 19 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 20: ... overload fault tOL and retries after tRETRY 750 ms Input voltage 85 VAC Ch 1 IOUT 1 A div Ch 3 VOUT 1 V div Figure 21 Output Over Voltage Protection The EVM was tested with an open FB loop no load OVP threshold is equal to 15 44 V Ch 3 VOUT 2 V div offset by 4 V 20 UCC28610EVM 474 25 W Universal Off Line Flyback Converter SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyr...

Страница 21: ...d B 180 120 60 0 60 120 180 P h a s e d e g r e e s Gain Phase www ti com Performance Data and Typical Characteristic Curves Figure 22 Bode Plot Input voltage 115 VAC full load Figure 23 Bode Plot Input voltage 230 VAC full load 21 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011 Texas Instruments In...

Страница 22: ... 24 through Figure 26 show the design of the UCC28610EVM 474 printed circuit board Figure 24 Top Layer Component Placement 22 UCC28610EVM 474 25 W Universal Off Line Flyback Converter SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 23: ...wing and Layout Figure 25 Bottom Layer Routing Figure 26 Bottom Layer Component Placement 23 SLUU383B November 2009 Revised May 2011 UCC28610EVM 474 25 W Universal Off Line Flyback Converter Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 24: ...electrolytic 680 µF 25 V 20 2 C15 C16 EEU FM1E681 Panasonic 10 x 25 mm 1 D1 Diode bridge 1 A 600 V DF06M Diodes Inc 1 D2 Diode ultra fast 1 A 200 V SMA MURA120T3G On Semiconductor Rohm 1 D3 Diode schottky 100 mA 40 V SOD 323 RB501V 40TE 17 Semiconductor 1 D4 Diode Zener 25 V 500 mW SOD 123 MMSZ5253BT1G On Semiconductor Diode fast recovery glass passivated 1 A 1 kV Micro Commercial 1 D5 UF4007 TP D...

Страница 25: ... Std 1 R13 Resistor chip 20 5 Ω 1 10 W 1 0603 Std Std 1 R14 Resistor chip 1 00 kΩ 1 10 W 1 0603 Std Std 1 R15 Resistor chip 681 Ω 1 10 W 1 0603 Std Std 1 R16 Resistor chip 0 Ω 1 10 W 1 0603 Std Std 1 R19 Resistor metal film 1 00 kΩ 1 4 W 1 TH 400 Std Std 1 T1 Transformer flyback 220 µH PQ20 20 58P6936 Vitec Electronics 1 U1 Green mode flyback controller SO 8 UCC28610D Texas Instruments Optocoupler...

Страница 26: ...ion of the evaluation module The Rev A version of the EVM includes differential mode inductors L2 and L3 Subsequent revisions of the EVM replaced these inductors with a short circuit Figure 27 UCC28610EVM 474 Rev A Schematic 26 SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 27: ...4 Rev A Figure 28 Top Side View of UCC28610EVM 474 Rev A Figure 29 Top Layer Component Placement for UCC28610EVM 474 Rev A 27 SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 28: ... 30 Bottom Layer Routing of UCC28610EVM 474 Rev A Figure 31 Bottom Layer Component Placement of UCC28610EVM 474 Rev A 28 SLUU383B November 2009 Revised May 2011 Submit Documentation Feedback Copyright 2009 2011 Texas Instruments Incorporated ...

Страница 29: ...µF 25 V 20 10 2 C15 C16 EEU FM1E681 Panasonic x 25 mm 1 D1 Diode bridge 1 A 600 V DF06M Diodes Inc 1 D2 Diode ultra fast 1 A 200 V SMA MURA120T3G On Semiconductor 1 D3 Diode Schottky 100 mA 40 V SOD 323 RB501V 40TE 17 Rohm Semiconductor 1 D4 Diode Zener 500 mW 25 V SOD 123 MMSZ5253BT1G On Semiconductor 1 D5 Diode fast recovery glass passivated 1 A 1 kV DO 41 UF4007 TP Micro Commercial Co 1 D6 Diod...

Страница 30: ...5 Vishay Dale R9 A 1 R10 Resistor chip 15 4 W 1 8 W 1 0805 Std Std 1 R11 Resistor chip 64 9 kΩ 1 2 W 1 2010 Std Std 1 R12 Resistor chip 33 2 Ω 1 W 5 2512 Std Std 1 R13 Resistor chip 20 5 Ω 1 10 W 1 0603 Std Std 1 R14 Resistor chip 1 00 kΩ 1 10 W 1 0603 Std Std 1 R15 Resistor chip 681 Ω 1 10 W 1 0603 Std Std 1 R16 Resistor chip 0 Ω 1 10 W 1 0603 Std Std 1 R19 Resistor metal film 1 00 kΩ 1 4 W 1 TH ...

Страница 31: ...afety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products or services might be or are used FCC W...

Страница 32: ...horized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all necessary expertise in the safety and regulatory ramifications of their applications and acknowledge ...

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