Texas Instruments TPS5124EVM-001 Скачать руководство пользователя страница 2

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EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION
PURPOSES ONLY
 and is not considered by TI to be fit for commercial use. As such, the goods being provided
may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety measures typically found in the end product incorporating the goods.
As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic
compatibility and therefore may not meet the technical requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned
within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE
WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED,
IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user
indemnifies TI from all claims arising from the 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 ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive
.

TI assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein
.

Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM
User’s Guide prior to handling the product. This notice contains important safety information about temperatures
and voltages. For further safety concerns, please contact the TI application engineer.

Persons handling the product must have electronics training and observe good laboratory practice standards.

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.

Mailing Address:

Texas Instruments
Post Office Box 655303
Dallas, Texas 75265

Copyright 

 2003, Texas Instruments Incorporated

Содержание TPS5124EVM-001

Страница 1: ...User s Guide 1 User s Guide...

Страница 2: ...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...

Страница 3: ...rtainty as to the load specification please contact a TI field representative During normal operation some circuit components may have case temperatures greater than 50 C The EVM is designed to operat...

Страница 4: ...Results Performance Data 13 6 Layout Considerations 16 7 PCB Layout 17 8 List of Materials 19 1 Introduction The TPS5124 is a dual independent synchronous buck controller Both controllers internal to...

Страница 5: ...Load transient response recovery time IOUT falling from 8 5 A to 0 A 120 s Loop bandwidth IOUT 15 A 30 kHz Phase margin IOUT 15 A 55 Output ripple voltage IOUT 15 A 33 66 mVPP Output rise time VIN 12...

Страница 6: ...SLUU182 March 2004 6 High Performance Dual Synchronous Buck Conversion Using the TPS5124 Figure 1 HPA053 TPS5124 Controller Schematic...

Страница 7: ...max where IRIPPLE is the ripple current flowing through the inductor The ripple current affects the output voltage ripple and core losses Based on 20 ripple current and 300 kHz the inductance value is...

Страница 8: ...nput Capacitors Due to the out of phase operation the input current ripple is partially cancelled The total RMS current in the input capacitor is calculated as follows This assumes the total input cur...

Страница 9: ...le current through the input capacitor is shown in Figure 3 and can be calculated using equation 8 IincapRMS 1 T T 2 0 IOUT1 IAVG 2 dt D1 T T 2 IOUT1 IOUT2 IAVG 2 dt T 2 D2 T D1 T IOUT2 IAVG 2 dt T T...

Страница 10: ...compensator are set at 2 68 kHz The two poles fP1 and fP2 and are set at 150 kHz and 2 MHz The frequency of poles and zeros are defined by the following equations fZ1 1 2p R4 C14 fZ2 1 2p R1 C12 assum...

Страница 11: ...g high side conduction the current limit circuit terminates the high side driver pulse If the set point voltage is exceeded during low side conduction the low side pulse is extended through the next c...

Страница 12: ...ltage Protection The under voltage comparator circuit continually monitors the voltage at the INV pin If the voltage at that pin falls below 78 of the 0 85 V reference the timer begins to charge C18 I...

Страница 13: ...tion functions of the TPS5124 for troubleshooting or other purposes the OCP OVP and UVP circuits may be disabled 4 7 4 1 Disabling Overcurrent Protection OCP Remove the current limit resistors R13 and...

Страница 14: ...eration conditions IOUT Output Current A Percent Efficiency OVERALL EFFICIENCY vs OUTPUT CURRENT VOUT1 3 3 V Enabled Only Figure 6 91 89 90 92 0 3 6 9 12 15 95 93 94 96 VIN 6 5 V VIN 12 V VIN 15 V IOU...

Страница 15: ...abled Figure 8 VIN 6 5 V VIN 12 V VIN 15 V 5 2 Typical Operating Waveform Typical operating waveforms taken at VIN 12 V IOUT1 15 A and IOUT2 10 A is shown in Figure 9 5 3 Start Up Waveform Figure 10 s...

Страница 16: ...response For Channel 1 3 3 V when the load steps from 0 A to 8 5 A the overshoot and undershoot voltages are about 150 mV For Channel 2 1 5 V when the load steps from 0 A to 7 5 A the overshoot voltag...

Страница 17: ...ivers to the gate of the power MOSFETs should be as short and wide as possible to reduce stray inductance This becomes more critical if external gate resistors are not used In addition external gate r...

Страница 18: ...utput voltage sensing trace should not be placed under the inductors on the same layer The feedback components should be isolated from output components such as MOSFETs inductors and output capacitors...

Страница 19: ...SLUU182 March 2004 19 High Performance Dual Synchronous Buck Conversion Using the TPS5124 Figure 15 Top Side Figure 16 Internal 1...

Страница 20: ...SLUU182 March 2004 20 High Performance Dual Synchronous Buck Conversion Using the TPS5124 Figure 17 Internal 2 Figure 18 Bottom Side...

Страница 21: ...r 3 pin 100 mil spacing 36 pin strip 0 100 x 3 Sullins PTC36SAAN L1 L2 2 Inductor SMT 2 2 H 20 A 4 6 m 0 51 x 0 51 Vishay Siliconix IHLP5050EZ 01 Q1 Q3 2 MOSFET N channel 30 V 18 A 8 0 m PWRPAK S0 8 V...

Страница 22: ...ute a license from TI to use such products or services or a warranty or endorsement thereof Use of such information may require a license from a third party under the patents or other intellectual pro...

Страница 23: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments TPS5124EVM...

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