Texas Instruments TPS54240EVM-VSON Скачать руководство пользователя страница 15 | Manualshive

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Texas Instruments TPS54240EVM-VSON Скачать руководство пользователя страница 15

Board Layout

15

SNVU602 – May 2019

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Copyright © 2019, Texas Instruments Incorporated

TPS54240EVM-VSON Regulator Evaluation Module

4

Board Layout

This section provides a description of the TPS54240EVM-VSON, board layout, and layer illustrations.

4.1

Layout

The board layout for the TPS54240EVM-VSON is shown in

through

. The EVM offers

resistors, capacitors and test points to configure the output voltage, enable (EN) pin, set frequency, and
external clock synchronization.

The VSON package offers an exposed thermal pad, which must be soldered to the copper landing on the
PCB for optimal thermal performance. The PCB consists of a 4-layer design. There are 2-oz copper
planes on the top and bottom and 1-oz copper mid-layer planes to dissipate heat with an array of thermal
vias under the thermal pad to connect to all four layers.

Test points have been provided for ease of use to connect the power supply, required load and to monitor
critical signals. The 12-pin edge connector can also be used to facilitate the use of a cable harness if one
is required.

Figure 17. TPS54240EVM-VSON Top-Side Assembly

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Содержание TPS54240EVM-VSON

Страница 1: ...ON Output Voltage Ripple in DCM Mode at 200 mA ILOAD 9 8 TPS54240EVM VSON Output Voltage Ripple in Eco mode at 20 mA ILOAD 9 9 TPS54240EVM VSON Input Voltage Ripple in CCM mode at 2 5 A ILOAD 10 10 TP...

Страница 2: ...Documentation Feedback Copyright 2019 Texas Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module Trademarks Eco mode is a trademark of Texas Instruments All other trademarks are the...

Страница 3: ...ps keep the junction temperature low at high output currents The compensation components are external to the integrated circuit IC and an external divider allows for an adjustable output voltage Addit...

Страница 4: ...A 87 7 CCM DCM boundary VIN 12 V 0 4 A Eco mode threshold VIN 12 V 45 mA 2 Test Setup and Results This section describes how to properly connect set up and use the TPS54240EVM VSON evaluation module...

Страница 5: ...TOR FUNCTION J1 VIN see Table 1 for VIN range J2 VOUT 3 3 V at 2 5 A maximum J3 Input and output GND TP1 VIN test point at VIN connector TP2 Output voltage test point at OUT connector TP5 Test point b...

Страница 6: ...the load current increases towards full load Figure 2 shows the efficiency for the TPS54240EVM VSON at an ambient temperature of 25 C Figure 2 TPS54240EVM VSON Efficiency Figure 3 shows the efficiency...

Страница 7: ...right 2019 Texas Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module 2 3 Output Voltage Load Regulation The load regulation for the TPS54240EVM VSON is shown in Figure 4 Figure 4 TPS...

Страница 8: ...ight 2019 Texas Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module 2 4 Load Transients The TPS54240EVM VSON response to load transients is shown in Figure 5 The current step is from...

Страница 9: ...54240EVM VSON output voltage ripple in CCM mode is shown in Figure 6 The ripple voltage is measured directly across the input capacitors When the output current is less than one half the peak to peak...

Страница 10: ...e in CCM mode is shown in Figure 9 The output current is the rated full load of 2 5 A and VIN 12 V The ripple voltage is measured directly across the input capacitors The TPS54240EVM VSON input voltag...

Страница 11: ...rising The input voltage is initially applied and when the input reaches the undervoltage lockout threshold the start up sequence begins and the output ramps up at the externally set rate toward the s...

Страница 12: ...Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module 2 9 Loop Characteristics The TPS54240EVM VSON loop response characteristics are shown in Figure 15 Gain and phase plots are shown...

Страница 13: ...ight 2019 Texas Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module 3 Schematic and Bill of Materials This section presents the TPS54240EVM VSON schematic and bill of materials 3 1 S...

Страница 14: ...0 Std Std 1 D1 40V Diode Schottky 40 V 3 A SMB SMB B340B 13 F Diodes Inc 3 J1 J2 J3 Standard Banana Jack Uninsulated 8 9mm Keystone575 8 575 8 Keystone 1 J4 Header 100mil 3x1 Gold TH Header 100mil 3x1...

Страница 15: ...frequency and external clock synchronization The VSON package offers an exposed thermal pad which must be soldered to the copper landing on the PCB for optimal thermal performance The PCB consists of...

Страница 16: ...NVU602 May 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module Figure 18 TPS54240EVM VSON Bottom Side Assembly Figure 19 TPS54...

Страница 17: ...NVU602 May 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module Figure 20 TPS54240EVM VSON Mid Layer 1 Layout Figure 21 TPS5424...

Страница 18: ...Instruments Incorporated TPS54240EVM VSON Regulator Evaluation Module Figure 22 TPS54240EVM VSON Bottom Side Layout 4 2 Estimated Circuit Area The estimated printed circuit board area for the compone...

Страница 19: ...Note that VIN must be in a range so that the minimum on time is greater than 130 ns and the maximum duty cycle is less than 90 Higher duty cycles are possible but may result in uneven switching behavi...

Страница 20: ...ther 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 tec...

Страница 21: ...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 in...

Страница 22: ...instructions set forth by Radio Law of Japan which includes but is not limited to the instructions below with respect to EVMs which for the avoidance of doubt are stated strictly for convenience and s...

Страница 23: ...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 electr...

Страница 24: ...R 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 Furthe...

Страница 25: ...e resources are subject to 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 reprod...

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