Texas Instruments TPS54231, User Manual

Page 1: ...VM 372 Line Regulation 6 Figure 2 5 TPS54231EVM 372 Transient Response 6 Figure 2 6 TPS54231EVM 372 Loop Response 7 Figure 2 7 TPS54231EVM 372 Output Ripple 7 Figure 2 8 TPS54231EVM 372 Input Ripple 8 Figure 2 9 TPS54231EVM 372 Start Up Relative to VIN 8 Figure 2 10 TPS54231EVM 372 Start up Relative to Enable 9 Figure 2 11 TPS54231EVM 372 Eco mode Operation 9 Figure 2 12 TPS54231EVM 372 Thermal Im...

Page 2: ...dervoltage lockout inputs The absolute maximum input voltage is 30 V for the TPS54231EVM 372 Table 1 1 Input Voltage and Output Current Summary EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE TPS54231EVM 372 VIN 7 V to 28 V 0 A to 2 A 1 2 Performance Specification Summary A summary of the TPS54231EVM 372 performance specifications is provided in Table 1 2 Specifications are given for an input voltage...

Page 3: ... section describes how to properly connect set up and use the TPS54231EVM 372 evaluation module The section also includes test results typical for the evaluation module and covers efficiency output voltage regulation load transients loop response output ripple input ripple and start up 2 1 Input Output Connections The TPS54231EVM 372 is provided with input output connectors and test points as show...

Page 4: ...f this EVM peaks at a load current of about 0 5 A 1 A and then decreases as the load current increases towards full load Figure 2 1 shows the efficiency for the TPS54231EVM 372 at an ambient temperature of 25 C 0 10 20 30 40 50 60 70 80 90 100 0 00 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 Output Current A IO Efficiency V 15 V IN V 24 V IN V 28 V IN V 7 V IN Figure 2 1 TPS54231EVM 372 Efficiency Fig...

Page 5: ...Regulation The load regulation for the TPS54231EVM 372 is shown in Figure 2 3 0 10 0 05 0 00 0 05 0 10 0 15 0 20 0 00 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 Output Current A Output Regulation Output Current I A O Output Regulation V 7 V IN V 15 V IN V 24 V IN V 28 V IN Figure 2 3 TPS54231EVM 372 Load Regulation Measurements are given for an ambient temperature of 25 C www ti com Test Setup and Re...

Page 6: ...ents The TPS54231EVM 372 response to load transients is shown in Figure 2 5 The current step is from 25 to 75 of maximum rated load at 15V input Total peak to peak voltage variation is as shown including ripple and noise on the output Figure 2 5 TPS54231EVM 372 Transient Response Test Setup and Results www ti com 6 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 RE...

Page 7: ...igure 2 6 TPS54231EVM 372 Loop Response 2 7 Output Voltage Ripple The TPS54231EVM 372 output voltage ripple is shown in Figure 2 7 The output current is the rated full load of 2 A and VIN 15 V The ripple voltage is measured directly across the output capacitors Figure 2 7 TPS54231EVM 372 Output Ripple www ti com Test Setup and Results SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedb...

Page 8: ...tage is initially applied and the output is inhibited by using a jumper at J2 to tie EN to GND When the jumper is removed EN is released When the EN voltage reaches the enable threshold voltage of 1 25 V the start up sequence begins and the internal reference voltage begins to ramp up at the internally set rate toward 0 8 V and the output voltage ramps up to the externally set value of 3 3 V The i...

Page 9: ... 372 Eco mode Operation 2 11 Thermal Characteristics This section shows a thermal image of the TPS54231EVM 372 running at 28 V input and 2 A load These are the worst case conditions for maximum power loss There is no air flow and the ambient temperature is 25 C The peak temperature of the IC 85 8 C is well below the maximum recommended operating condition listed in the datasheet of 150 C www ti co...

Page 10: ...72 Thermal Image Test Setup and Results www ti com 10 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 11: ...ced around the board including ten vias directly under the TPS54231 device to provide a thermal path from the top side ground plane to the bottom side ground plane The input decoupling capacitors C1 C2 and C3 and bootstrap capacitor C4 are all located as close to the IC as possible In addition the voltage set point resistor divider components are also kept close to the IC The voltage divider netwo...

Page 12: ...d printed circuit board area for the components used in this design is 0 68 in2 This area does not include test point or connectors Board Layout www ti com 12 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 13: ...of materials 4 1 Schematic Figure 4 1 is the schematic for the TPS54231EVM 372 www ti com Schematic and Bill of Materials SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback TPS54231 Step Down Converter Evaluation Module User s Guide 13 Copyright 2021 Texas Instruments Incorporated ...

Page 14: ...resents the bill of materials for the TPS54231EVM 372 Schematic and Bill of Materials www ti com 14 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Page 15: ... Chip 1 16W 1 0603 Std Std 1 R3 29 4k Resistor Chip 1 16W 1 0603 Std Std 1 R4 0 Resistor Chip 1 16W 1 0603 Std Std 1 R5 10 2k Resistor Chip 1 16W 1 0603 Std Std 1 R6 3 24k Resistor Chip 1 16W 1 0603 Std Std 0 R7 Open Resistor Chip 1 16W 1 0603 Std Std 3 TP1 TP3 TP5 5000 Test Point Red Thru Hole Color Keyed 0 100 0 100 inch 5000 Keystone 3 TP2 TP4 TP6 5001 Test Point Black Thru Hole Color Keyed 0 1...

Page 16: ...other than TI b the nonconformity resulted from User s design specifications or instructions for such EVMs or improper system design or c User has not paid on time Testing and other quality control techniques are used to the extent TI deems necessary TI does not test all parameters of each EVM User s claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects...

Page 17: ... These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation...

Page 18: ...y for convenience and should be verified by User 1 Use EVMs in a shielded room or any other test facility as defined in the notification 173 issued by Ministry of Internal Affairs and Communications on March 28 2006 based on Sub section 1 1 of Article 6 of the Ministry s Rule for Enforcement of Radio Law of Japan 2 Use EVMs only after User obtains the license of Test Radio Station as provided in R...

Page 19: ... any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Page 20: ...OR DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Page 21: ...o change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...