Texas Instruments 296-20597-ND User Manual Download | Manualshive

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November 2002

PMP EVMs

User’s Guide

SLVU076

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Summary of Contents for 296-20597-ND

Page 1: ... November 2002 PMP EVMs User s Guide SLVU076 ...

Page 2: ...nt that any license either express or implied is granted under any TI patent right copyright mask work right or other TI intellectual property right relating to any combination machine or process in which TI products or services are used Information published by TI regarding third party products or services does not constitute a license from TI to use such products or services or a warranty or end...

Page 3: ... handling or use of the goods Please be aware that the products received may not be regulatory compliant or agency certified FCC UL CE etc Due to the open construction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR A...

Page 4: ...ere is uncertainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 55 C The EVM is designed to operate properly with certain components above 60 C as long as the input and output ranges are maintained These components include but are not limited to linear regulators switching transistors p...

Page 5: ...d circuit descriptions are included How to Use This Manual This document contains the following chapters Chapter 1 Introduction Chapter 2 Test Setup and Results Chapter 3 Board Layout Chapter 4 Schematic and Bill of Materials Information About Cautions and Warnings This book may contain cautions and warnings This is an example of a caution statement A caution statement describes a situation that c...

Page 6: ...397 TPS54872 SLVS436 TPS54972 SLVS437 FCC Warning This equipment is intended for use in a laboratory test environment only It gen erates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to subpart J of part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operatio...

Page 7: ... 2 2 2 2 Efficiency 2 3 2 3 Power Dissipation 2 4 2 4 Output Voltage Regulation 2 5 2 5 Load Transients 2 6 2 6 Source Sink Transient Response 2 8 2 7 Loop Characteristics 2 10 2 8 Output Voltage Ripple 2 13 2 9 Input Voltage Ripple 2 15 2 10 Start Up 2 17 3 Board Layout 3 1 3 1 Layout 3 2 4 Schematic and Bill of Materials 4 1 4 1 Schematic 4 2 4 2 Bill of Materials 4 3 ...

Page 8: ... VI 4 V 2 11 2 15 Measured Loop Response TPS54872 VI 6 V 2 11 2 16 Measured Loop Response TPS54972 VI 3 V 2 12 2 17 Measured Loop Response TPS54972 VI 4 V 2 12 2 18 Measured Output Voltage Ripple TPS54672 2 13 2 19 Measured Output Voltage Ripple TPS54872 2 13 2 20 Measured Output Voltage Ripple TPS54972 2 14 2 21 Input Voltage Ripple TPS54672 2 15 2 22 Input Voltage Ripple TPS54872 2 15 2 23 Input...

Page 9: ...put Current Summary 1 2 1 2 TPS54672EVM 222 Performance Specification Summary 1 3 1 3 TPS54872EVM 222 Performance Specification Summary 1 3 1 4 TPS54972EVM 222 Performance Specification Summary 1 4 4 1 TPS54x72EVM 222 Bill of Materials 4 3 ...

Page 10: ...entation for the TPS54672EVM 222 TPS54872EVM 222 and TPS54972EVM 222 evaluation modules SLVP222 The TPS54x72EVM 222 performance specifications are given as well as the schematic and bill of material for the TPS54x72EVM 222 Topic Page 1 1 Background 1 2 1 2 Performance Specification Summary 1 3 1 3 Modifications 1 4 Chapter 1 ...

Page 11: ...00 kHz allowing the use of a small footprint 0 65 µH output inductor The MOSFETs of the TPS54x72 are incorporated inside the TPS54x72 package This eliminates the need for external MOSFETs and their associated drivers The low drain to source on resistance of the MOSFETs gives the TPS54x72 high efficiency and helps to keep the junction temperature low at high output currents The compensation compone...

Page 12: ...width VI 3 V 80 kHz Phase margin VI 3 V 48 Loop bandwidth VI 6 V 100 kHz Phase margin VI 6 V 47 Input ripple voltage 245 275 mVPP Output ripple voltage 7 10 mVPP Output rise time 4 7 8 4 15 ms Operating frequency 700 kHz Maximum efficiency VI 5 0 V Vo 1 25 V IO 2 5 A 86 2 Table 1 3 TPS54872EVM 222 Performance Specification Summary Specification Test Conditions Min Typ Max Units Input voltage range...

Page 13: ...nsive modifications have been ommited from this EVM Changing the V DDQ voltage from 0 92 V to 3 5 V can change the output voltage in the range of 0 46 V to 1 75 V Output voltages above 1 75 V can be obtained by modifying the REFIN voltage divider of R6 and R7 and scaling the output feedback voltage into the VSENSE pin using the voltage divider of R1 and R9 normally not used To maintain the output ...

Page 14: ...ide space for up to three electrolytic type surface mount capacitors while the position for L2 accommodates popular inductors such as Vishay IHLP 5050 series with a 0 5 in 0 5 in package Since changes in the output filter affect the overall loop response the user may find it desirable to change the values used in the compensation network R1 R2 R3 C1 C2 and C3 The 0 Ω resistor R8 in the feedback pa...

Page 15: ...1 6 ...

Page 16: ...fficiency output voltage regulation load transients loop response output ripple input ripple and start up Topic Page 2 1 Input Output Connections 2 2 2 2 Efficiency 2 3 2 3 Power Dissipation 2 4 2 4 Output Voltage Regulation 2 5 2 5 Load Transients 2 6 2 6 Source Sink Transient Response 2 8 2 7 Loop Characteristics 2 10 2 8 Output Voltage Ripple 2 13 2 9 Input Voltage Ripple 2 15 2 10 Start Up 2 1...

Page 17: ...e probe to monitor the output voltage The TPS54X72 is intended to be used as a point of load regulator In typical applications it is usually located close to the input voltage source When using the TPS54x72EVM 222 with an external power supply as the source for VI an additional bulk capacitor may be required depending upon the output impedance of the source and length of the hookup wires The test ...

Page 18: ...inputs at an ambient temperature of 25 C The efficiency is lower at higher ambient temperatures due to temperature variation in the drain to source resistance of the MOSFETs The efficiency is slightly lower at 700 kHz than at lower switching frequencies due to the gate and switching losses in the MOSFETs Figure 2 2 Measured Efficiency 50 55 60 65 70 75 80 85 90 95 100 0 2 4 6 8 10 TPS54972 TPS5467...

Page 19: ...y 55 C The total circuit losses at 25 C are shown in Figure 2 3 The input voltage for the TPS54972 is 3 3 V and for the TPS54672 and TPS54872 5 0 V Note that for a given output current the TPS54972 dissipates less power due to the lower drain to source on resistance of the MOSFETs For additional information on the dissipation ratings of the devices see the individual product data sheets Figure 2 3...

Page 20: ... an ambient temperature of 25 C Figure 2 4 Load Regulation 1 24 1 242 1 244 1 246 1 248 1 25 1 252 1 254 1 256 1 258 1 26 0 1 2 3 4 5 6 7 8 9 10 TPS54972 TPS54672 TPS54872 OUTPUT VOLTAGE vs OUTPUT CURRENT IO Output Current A Output Voltage V V O Figure 2 5 Line Regulation 1 24 1 242 1 244 1 246 1 248 1 25 1 252 1 254 1 256 1 258 1 26 3 3 5 4 4 5 5 5 5 6 TPS54972 TPS54672 TPS54872 OUTPUT VOLTAGE vs...

Page 21: ...The current step is from 25 to 75 percent of maximum rated load Total peak to peak voltage variation is as shown including ripple and noise on the output Figure 2 6 Load Transient Response TPS54672 VO ac 50 mV div IO 2 A div Time Scale 250 µs div Figure 2 7 Load Transient Response TPS54872 VO ac 50 mV div IO 2 A div Time Scale 250 µs div ...

Page 22: ...Load Transients 2 7 Test Setup and Results Figure 2 8 Load Transient Response TPS54972 VO ac 50 mV div IO 2 A div Time Scale 250 µs div ...

Page 23: ...Figure 2 11 The current step is from 50 to 50 of maximum rated load Total peak to peak voltage variation is as shown including ripple and noise on the output Figure 2 9 Source Sink Current Transient Response TPS54672 VO ac 50 mV div IO 2 A div Time Scale 250 µs div Figure 2 10 Source Sink Current Transient Response TPS54872 VO ac 50 mV div IO 2 A div Time Scale 250 µs div ...

Page 24: ...Source Sink Transient Response 2 9 Test Setup and Results Figure 2 11 Source Sink Current Transient Response TPS54972 VO ac 50 mV div IO 5 A div Time Scale 250 µs div ...

Page 25: ...ured Loop Response TPS54672 VI 3 V 60 50 40 30 20 10 0 10 20 30 40 50 60 100 1 k 10 k 100 k 1 M 180 150 120 90 60 30 0 30 60 90 120 150 180 Phase Gain Gain dB f Frequency Hz MEASURED LOOP RESPONSE Phase Degrees VI 3 V Figure 2 13 Measured Loop Response TPS54672 VI 6 V 60 50 40 30 20 10 0 10 20 30 40 50 60 100 1 k 10 k 100 k 1 M 180 150 120 90 60 30 0 30 60 90 120 150 180 Phase Gain Gain dB f Frequ...

Page 26: ...1 M 180 150 120 90 60 30 0 30 60 90 120 150 180 Phase Gain Gain dB f Frequency Hz MEASURED LOOP RESPONSE VI 4 V Phase Degrees Figure 2 15 Measured Loop Response TPS54872 VI 6 V 60 50 40 30 20 10 0 10 20 30 40 50 60 100 1 k 10 k 100 k 1 M 180 150 120 90 60 30 0 30 60 90 120 150 180 Phase Gain Gain dB f Frequency Hz MEASURED LOOP RESPONSE VI 6 V Phase Degrees ...

Page 27: ...120 90 60 30 0 30 60 90 120 150 180 Phase Gain Gain dB f Frequency Hz MEASURED LOOP RESPONSE VI 3 V Phase Degrees Figure 2 17 Measured Loop Response TPS54972 VI 4 V 60 50 40 30 20 10 0 10 20 30 40 50 60 100 1 k 10 k 100 k 1 M 180 150 120 90 60 30 0 30 60 90 120 150 180 Phase Gain Gain dB f Frequency Hz MEASURED LOOP RESPONSE VI 4 V Phase Degrees ...

Page 28: ...type The input voltage is 3 3 V for the TPS54672 and TPS54972 The input voltage is 5 V for the TPS54872 Output current for each device is the rated full load Voltage is measured directly across output capacitors Figure 2 18 Measured Output Voltage Ripple TPS54672 VO ac 10 mV div Time Scale 1 µs div Figure 2 19 Measured Output Voltage Ripple TPS54872 VO ac 10 mV div Time Scale 1 µs div ...

Page 29: ...Output Voltage Ripple 2 14 Figure 2 20 Measured Output Voltage Ripple TPS54972 VO ac 10 mV div Time Scale 1 µs div ...

Page 30: ...2 22 and Figure 2 23 for each device type The input voltage is 3 3 V for the TPS54672 and TPS54972 The input voltage is 5 V for the TPS54872 Output current for each device is rated full load Figure 2 21 Input Voltage Ripple TPS54672 VO ac 100 mV div Time Scale 1 µs div Figure 2 22 Input Voltage Ripple TPS54872 VO ac 100 mV div Time Scale 1 µs div ...

Page 31: ...Input Voltage Ripple 2 16 Figure 2 23 Input Voltage Ripple TPS54972 VO ac 100 mV div Time Scale 1 µs div ...

Page 32: ...V 3 8 V for the TPS54872 startup voltage threshold until the output voltage begins to ramp up to the final value of 1 25 V The output voltage tracks the greater of the internal and external slow start voltages accounting for the change in ramp rates Figure 2 24 Measured Start Up Waveform TPS54672 VI 1 V div Time Scale 2 5 ms div VO 500 mV div Figure 2 25 Measured Start Up Waveform TPS54872 VI 2 V ...

Page 33: ...Start Up 2 18 Figure 2 26 Measured Start Up Waveform TPS54972 VI 1 V div Time Scale 2 5 ms div VO 500 mV div ...

Page 34: ...3 1 Board Layout This chapter provides a description of the TPS54x72EVM 222 board layout and layer illustrations Topic Page 3 1 Layout 3 2 Chapter 3 ...

Page 35: ...d are dedicated ground planes The bottom layer contains pads for an optional alternate output filter including space for three D3 or D4 case size electrolytic capacitors and an alternate inductor of 0 5 in x 0 5 in size ground traces The top and bottom ground traces are connected to the internal ground planes with 45 vias placed around the board including 12 directly under the TPS54x72 device to p...

Page 36: ...Layout 3 3 Board Layout Figure 3 2 Internal Layer 1 Layout Figure 3 3 Internal Layer 2 Layout ...

Page 37: ...Layout 3 4 Figure 3 4 Bottom Side Layout Looking From Top Side Figure 3 5 Top Side Assembly ...

Page 38: ...Layout 3 5 Board Layout Figure 3 6 Bottom Side Assembly Showing Optional Components ...

Page 39: ...3 6 ...

Page 40: ...4 1 Schematic and Bill of Materials The TPS54x72EVM 222 schematic and bill of materials are presented in this chapter Topic Page 4 1 Schematic 4 2 4 2 Bill of Materials 4 3 Chapter 4 ...

Page 41: ...H PH RT ENA REFIN VBIAS VIN VIN VIN VIN VIN PGND PGND PGND PGND PGND 15 16 17 18 19 20 21 22 23 24 25 26 27 28 U1 TPS54672PWP 1 R1 10 kΩ R3 301 Ω C3 470 pF R9 OPEN TP4 R4 2 4 Ω PH C5 3300 pF L1 0 65 µF PH 1 2 L2 USER C7 22 µF C9 22 µF C11 22 µF C12 1 µF TP7 TP6 TP5 TP10 VTTQ R8 0 Ω VTTQ 1 2 J2 VDDQ GND C15 USER C16 USER C17 USER C8 10 µF C10 1 µF R7 10 kΩ C14 0 1 µF R6 10 kΩ C13 0 1 µF R5 71 5 kΩ ...

Page 42: ...325BJ106MN 1 1 1 C5 Capacitor ceramic 3300 pF 50 V X7R 10 603 Panasonic ECJ 1VB1H332K 1 1 1 C6 Capacitor ceramic 0 047 µF 25 V X7R 10 603 Panasonic ECJ 2VB1E473K 3 3 3 C7 C9 C11 Capacitor ceramic 22 µF 6 3 V X5R 20 1210 Taiyo Yuden JMK325BJ226MN 2 2 2 J1 J2 Terminal block 2 pin 15 A 5 1 mm 0 40 0 35 OST ED1609 1 1 1 J3 Header 2 pin 100 mil spacing 36 pin strip 23100 Sullins PTC36SAAN 1 1 1 L1 Indu...

Page 43: ...ination synch PWM switcher PWP28 TI TPS54672PWP 1 U1 IC tracking termination synch PWM switcher PWP28 TI TPS54872PWP 1 U1 IC tracking termination synch PWM switcher PWP28 TI TPS54972PWP 1 1 1 PCB 3 in 3 in 0 063 in Any SLVP222 Note SLVP222 001 is TPS54672EVM 222 SLVP222 002 is TPS54872EVM 222 SLVP222 003 is TPS54972EVM 222 ...

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