TPS65251EVM

www.ti.com Table of Contents User’s Guide TPS65251 Buck Converter Evaluation Module User's Guide Table of Contents 1 Introduction.............................................................................................................................................................................2 2 Background.............................................................................................................................................................................3 3 Schematic................................................................................................................................................................................4 4 Placement (Top Layer)............................................................................................................................................................6 5 Bench Test Setup Conditions................................................................................................................................................ 7 5.1 Headers Description and Jumper Placement.....................................................................................................................7 5.2 Jumpers..............................................................................................................................................................................8 5.3 Test Points and Placement.................................................................................................................................................8 6 Power-Up Procedure.............................................................................................................................................................. 9 7 Bill of Materials..................................................................................................................................................................... 10 8 Revision History....................................................................................................................................................................11 Trademarks All trademarks are the property of their respective owners. SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 1 Introduction www.ti.com 1 Introduction This document presents the information required to power the TPS65251 PMIC as well as the support documentation including schematic and bill of materials. 2 TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback www.ti.com Background 2 Background The TPS65251 PMIC is designed to provide 3-A and 2-A continuous outputs with an operational range of 4.5 V to 18 V and an externally set switching frequency ranging from 300 kHz to 2.2 MHz. When the PMIC is not fully loaded, Buck1 can be loaded to 3.5 A and Buck2 and Buck3 to 2.5 A. As there are many possible options to set the converters, Table 2-1 presents the performance specification summary for the EVM. Table 2-1. Input Voltage and Output Current Summary EVM TEST CONDITIONS OUTPUT CURRENT RANGE Buck1, 1.2 V, 3 A TPS65251EVM Buck2, 1.8 V, 2 A VIN = 4.5 V to 13 V fsw = 500 kHz Buck3, 3.3 V, 2 A (25°C ambient) This evaluation module is designed to provide access to the features of the TPS65251. Some modifications can be made to this module to test performance at different input and output voltages, current and frequency operation. Please contact TI Field Applications Group for advice on these matters. SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 3 Schematic www.ti.com 3 Schematic See next page. The resistor and capacitor values have been chosen according to the guidelines presented on the TPS65251 spec available at http://focus.ti.com/docs/prod/folders/print/tps65251.html. Note that for the purpose of gains-phase measurements R10, R19 and R21 (0 Ω on the EVM) need to be replaced by suitable low value resistors as per the network analyzer setup required. Test points are provided on either end of the resistors to allow for easy measurement. 4 TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback J1 3 2 1 R12 80.6K R9 40.2K TP10 FB1A R19 0 VOUT1 GND 4.7nF C13 TP5 1.2V@3A FB1 GND GND VOUT1 J3 2 FB2 GND V3V R15 32.4K 40.2K R11 TP16 FB2A R21 0 VOUT2 TP12 VOUT2 GND 4.7nF C18 1.8V@2A 1 GND VOUT2 J2 VOUT1 GND C16 22uF 4.7uH L2 TDK-SLF7055 4.7uH L1 TDK-SLF7055 C12 22uF GND C5 4.7nF GND JP2 GND VIN C7 VIN C10 10uF 47nF 47nF 41 20 19 18 17 16 15 14 13 12 11 Pin 25 SDA and Pin 26 SCLK access GND C24 C17 10uF C29 4.7nF GND GND JP4 GND ENB1 PwrPad EN2 BST2 VIN2 LX2 LX2 LX1 LX1 VIN1 BST1 EN1 C4 R16 120K GND 4.7nF C25 R7 383K R17 20K 4.7nF R3 20K 1.2V@3A GND GND GND C26 C27 3.3uF TP28 GND V3V U1 GND VIN VIN VIN GND LX3 LX3 VIN3 BST3 EN3 4.7nF R4 120K TP27V7V TP29 10uF JP6 GND 4.7nF C3 R18 PGOOD C20 JP5 GND C14 C1 JP1 FB3 GND TPS65251 FB2 C28 GND C19 FB1 4.7nF C2 GND 100K 4.7nF R5 20K R1 GND 9 1 V3V 10 RLIM1 RLIM2 21 SS1 SS2 22 8 23 2 LOW_P (SDA) 25 CMP1 COMP2 6 DNI GND 26 1 DNI DNI GND (SCLK) 7 FB1 FB2 24 ROSC 5 SYNC 4 FB3 PGOOD 27 2 100K Copyright © 2021 Texas Instruments Incorporated PGOOD 3 COMP3 V7V 28 SS3 V3V 29 RLIM3 AGND 30 SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback AGND VIN 31 32 33 34 35 36 37 38 39 40 C8 GND C9 VIN 4.7uH L3 TDK-SLF7055 GND 10uF C30 GND TP33 VIN GND 10uF 47nF ENB3 V3V GND 22uF C11 3.31V@2A GND GND C6 4.7nF JP3 TP8 FB3A TP4 VOUT3 R13 12.7K FB3 R20 40.2K R10 0 GND 4.7nF C15 VOUT3 VOUT3 J6 GND GND GND GND GND 2 1 TP15 TP14 TP2 TP1 GND www.ti.com Schematic Figure 3-1. TPS65251 Schematic TPS65251 Buck Converter Evaluation Module User's Guide 5 Placement (Top Layer) www.ti.com 4 Placement (Top Layer) Figure 4-1. Placement (Top Layer) 6 TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback Bench Test Setup Conditions www.ti.com 5 Bench Test Setup Conditions 5.1 Headers Description and Jumper Placement Vin 4.5V – 18V Vout 3 Vout_1 + + Vout 2 + SYNC LOW P SCLK EN 1 Vout 1 EN 2 Vout 2 EN 3 Vout 3 Figure 5-1. Headers Description and Jumper Placement Test points: Black – GND White – Each output, feed-back, power good and VIN. All marking on PCB. SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 7 Bench Test Setup Conditions www.ti.com 5.2 Jumpers Table 5-1. Jumpers JUMPER NO. FUNCTION PLACEMENT COMMENT JP1 SYNC input For buck internal clock fit jumper. For external SYNC connect as per drawing. Jumper must be fitted if no external SYNC is used JP2 Buck1 enable (EN1) For automatic start-up fit jumper to V3V. For sequencing do not fit jumper. To disable converter fit jumper to GND. Fit according to test requirement JP3 Buck3 enable (EN3) For automatic start-up fit jumper to V3V. For sequencing do not fit jumper. To disable converter fit jumper to GND. Fit according to test requirement JP4 Buck2 enable (EN2) For automatic start-up fit jumper to V3V. For sequencing do not fit jumper. To disable converter fit jumper to GND. Fit according to test requirement JP5 LOW_P Low power: Power save mode ON/OFF. If need low power mode test, should connect V3V internal regulator test point (TP29). Fit according to test requirement. During normal operation jumper must be fitted. JP6 GND For normal operation fit jumper (GND) Fit according to test requirement. During normal operation jumper must be fitted. 5.3 Test Points and Placement Buck converter outputs are red and have a label for easy location. Close to any of these test points there are black ground test points to allow for DVM measurement or to use a metal exposed scope probe to reduce common mode noise measurements. All test points are described in Table 5-2. Table 5-2. Test Points and Placement TEST POINT 8 NAME SIGNAL COLOR TP1 GND Ground Black TP2 GND Ground Black COMMENT TP3 AGND Ground TP4 VOUT3 Buck3 output White Not fitted. Only Via. TP5 VOUT1 Buck1 output White TP8 FB3A Input for gain-phase measurement Buck3 White Normally not used TP10 FB1A Input for gain-phase measurement Buck1 White Normally not used TP12 VOUT2 Buck2 output White Normally not used TP14 GND Ground Black TP15 GND Ground Black TP16 FB2A Input for gain-phase measurement Buck2 White TP27 PGOOD Power Good (open drain connected to Buck1 output) White TP28 V7V V7V pin (internal rail) White TP29 V3V V3V pin (internal rail) White TP33 VIN Input supply White TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated Normally not used SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback www.ti.com Power-Up Procedure 6 Power-Up Procedure 1. Define which converters are to be enabled or disabled by connecting the correct jumpers accordingly (enable to V3V, disable to GND for all cases). 2. Apply a DC voltage to jumper J3. Polarity is clearly marked on the silk-screen. 3. Verify that the relevant converters are powered up by the output voltages. The whole start-up process will take around 100 ms. PGOOD will be asserted after 1 s. 4. Apply loads to the output connectors. 5. For low power and SYNC operation remove the jumpers and connect control supplies as indicated in the bench test setup section. SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 9 Bill of Materials www.ti.com 7 Bill of Materials Table 7-1. Bill of Materials 10 ITEM QUANTITY DESIGNATOR VALUE FOOTPRINT MANUFACTURER MANUFACTURER PART NO. DESCRIPTION COMMENT 1 9 C1, C2, C3, C4, C5, C6, C25, C28, C29 4.7 nF 603 Panasonic -ECG ECJ-1VB1H472K 4700PF 50V X7R 0603 Ceramic capacitor 2 3 C7, C8, C24 47 nF 603 Panasonic -ECG ECJ-1VF1H473Z 47000PF 50V Y5V 0603 Ceramic capacitor 3 3 C9, C10, C17 10 µF 1206 Panasonic -ECG ECJ-3YB1E106M 10UF 25V X5R 1206 Ceramic capacitor 4 3 C11, C12, C16 22 µF 1210 Panasonic -ECG ECJ-4YB1E226M 22UF 25V X5R 1210 Ceramic capacitor 5 3 C13, C15, C18 470 pF 603 Panasonic -ECG ECJ-1VB2A471K 470PF 100V X7R 0603 Ceramic capacitor 6 3 C14, C19, C20 DNI 603 Ceramic capacitor Capacitor 7 1 C26 10 µF 805 Panasonic -ECG ECJ-2FB1A106K 10UF 10V X5R 0805 8 1 C27 3.3 µF 603 TDK C1608X5R1A335K 3.3UF 10V X5R 0603 Ceramic capacitor 9 1 C30 10 µF 1206 Panasonic -ECG ECJ-3YB1E106M 10UF 25V, X5R 1206 Ceramic capacitor 10 1 J1 TB_3X3.5MM OnShoreTechnology Inc ED555/3DS Terminal, 3 pin, 6 A, 3.5 mm VOUT1 11 1 J2, J3, J6 TB_2X3.5MM OnShoreTechnology Inc ED555/2DS Terminal, 2 pin, 6 A, 3.5 mm TBLK_6A_2X3.5MM 12 3 JP1, JP5, JP6 JMP0.2 Mil-Max 800-10-064-10-0010 00 SIP HEADER STRAIGHT PCB JUMPER 2 PIN 13 3 JP2, JP3, JP4 JMP0.3 Mil-Max 800-10-064-10-0010 00 SIP HEADER STRAIGHT PCB JUMPER 2 PIN 14 3 L1, L2, L3 4.7 µH IND_SLF7055 TDK Corporation SLF7055T-4R7N3R 1-3PF Magnetic-Core Inductor TDK-SLF7055 15 2 R1, R18 100 kΩ 603 Panasonic -ECG ERA-3AEB104V RES 100 kΩ 1/10 W .1% 0603 SMD Resistor 16 3 R3, R5, R17 20 kΩ 603 Panasonic -ECG ERA-3YEB203V RES 20 kΩ 1/10 W .1% 0603 SMD Resistor 17 2 R4, R16 150 kΩ 603 Panasonic -ECG ERJ-3EKF1503V RES 150 kΩ 1/10 W 1% 0603 SMD Resistor 18 1 R7 383 kΩ 603 Panasonic -ECG ERJ-3EKF3833V RES 383 kΩ 1/10 W 1% 0603 SMD Resistor 19 1 R8 DNI 603 Panasonic -ECG ERJ-3GEY0R00V RES ZERO Ω 1/10 W 5% 0603 SMD Resistor 20 3 R9, R11, R20 360 kΩ 603 Panasonic -ECG ERJ-3EKF3603V RES 360 kΩ 1/10 W 1% 0603 SMD Res1 21 3 R10, R19, R21 49.9 Ω 603 Susumu Co Ltd RR0816Q-49R9D-68R RES 49.9 Ω 1/16 W .5% 0603 SMD Res1 22 1 R12 715 kΩ 603 Panasonic -ECG ERJ-3EKF7153V RES 715 kΩ 1/10 W 1% 0603 SMD Resistor 23 1 R13 115 kΩ 603 Panasonic -ECG ERJ-3EKF1153V RES 115 kΩ 1/10 W 1% 0603 SMD Resistor 24 1 R15 287 kΩ 603 Panasonic -ECG ERJ-3EKF2873V RES 287 kΩ 1/10 W 1% 0603 SMD Resistor TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback www.ti.com Revision History Table 7-1. Bill of Materials (continued) ITEM QUANTITY DESIGNATOR VALUE FOOTPRINT MANUFACTURER MANUFACTURER PART NO. DESCRIPTION COMMENT 25 4 TP1, TP2, TP14, TP15, Black TEST POINT 0.052 Keystone 5001 TEST POINT MINI .040"D BLACK GND 26 1 TP3 STD TP-SMALL 27 1 TP4, TP5, TP8, TP10, TP12, TP16, TP27, TP28, TP29, TP33 TEST POINT 0.052 Keystone 28 1 U1 QFN-40 TI Test Point, 0.020 Hole 5002 TEST POINT MINI .040"D WHITE Glass Beaded Test Point TPS65251 8 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision A (August 2010) to Revision B (May 2021) Page • Updated user's guide title................................................................................................................................... 2 • Updated the numbering format for tables, figures, and cross-references throughout the document. ................2 SLVU399B – AUGUST 2010 – REVISED MAY 2021 Submit Document Feedback TPS65251 Buck Converter Evaluation Module User's Guide Copyright © 2021 Texas Instruments Incorporated 11 IMPORTANT NOTICE AND DISCLAIMER TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATA SHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS. 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