TPS62816EVM-140

www.ti.com Table of Contents User’s Guide TPS62816EVM-140 Evaluation Module ABSTRACT This user’s guide describes the characteristics, operation, and use of TI's evaluation module (EVM) for the TPS62816-Q1 devices. The TPS62816EVM-140 is designed to help the user easily evaluate and test the operation and functionality of the TPS62816-Q1 buck converters. The EVM converts a 2.7-V to 6.0-V input voltage to a regulated 1.8-V output voltage that delivers up to 6 A. This user’s guide includes setup instructions for the hardware, a printed-circuit board (PCB) layout, a schematic diagram and a bill of materials (BOM). Table of Contents 1 Warning and Caution..............................................................................................................................................................2 2 Introduction.............................................................................................................................................................................2 3 Setup........................................................................................................................................................................................4 4 TPS62816EVM-140 Test Results............................................................................................................................................4 5 Board Layout...........................................................................................................................................................................4 6 Schematic ...............................................................................................................................................................................7 7 List of Materials.......................................................................................................................................................................8 List of Figures Figure 5-1. Top Silk......................................................................................................................................................................4 Figure 5-2. Top Layer...................................................................................................................................................................5 Figure 5-3. Layer 2...................................................................................................................................................................... 5 Figure 5-4. Layer 3...................................................................................................................................................................... 5 Figure 5-5. Layer 4...................................................................................................................................................................... 6 Figure 5-6. Layer 5...................................................................................................................................................................... 6 Figure 5-7. Bottom Layer............................................................................................................................................................. 6 Figure 6-1. TPS62816EVM-140 Schematic.................................................................................................................................7 List of Tables Table 2-1. Performance Specification Summary..........................................................................................................................2 Table 7-1. TPS62816EVM-140 List of Materials..........................................................................................................................8 Trademarks All trademarks are the property of their respective owners. SLVUC10 – MARCH 2021 Submit Document Feedback TPS62816EVM-140 Evaluation Module Copyright © 2021 Texas Instruments Incorporated 1 www.ti.com Warning and Caution 1 Warning and Caution Caution Hot surface. Contact may cause burns, Do not touch! Caution 2 Introduction The TPS62816-Q1 device is a high-frequency, synchronous, step-down converter optimized for a small solution size and high efficiency. The devices focus on high-efficiency, step-down conversion over a wide output current range. At medium to heavy loads, the converter operates in PWM mode and automatically enters Power Save Mode operation at light load to maintain high efficiency over the entire load-current range. The internal compensation circuit allows a compact solution and small external components. The device is available in a 3.0-mm × 2.0-mm, 9-pin VQFN package. 2.1 Performance Specification Table 2-1 provides a summary of the TPS62816EVM-140 performance specifications. Table 2-1. Performance Specification Summary Specification Test Conditions Input voltage MIN 2.7 Output voltage setpoint Output current TYP MAX 6.0 1.8 TPS62816EVM-140 0 Unit V V 6.0 A 2.2 Modifications The printed-circuit board (PCB) for this EVM is designed to accommodate the different adjustable output voltage versions of this integrated circuit (IC). On the EVM, additional input and output capacitors can be added, the soft-start time can be changed and the switching frequency can be modified. 2.2.1 Input and Output Capacitors A footprint for an additional output capacitor (C19) is provided. This capacitors is not required for proper operation but can be used to reduce output voltage ripple and to improve the load transient response. For proper operation the total output capacitance must remain within the recommended range described in the TPS62816-Q1 Low Input Voltage, Adjustable-Frequency Step-Down Converter data sheet. 2.2.2 Adjustable-Output IC U1 Operation U1 is configured for evaluation of the adjustable-output version. This unit is set to 1.8 V. Resistors R1 and R2 can be used to set the output voltage between 0.6 V and 5.5 V. For recommended values, see the TPS62816Q1 Low Input Voltage, Adjustable-Frequency Step-Down Converter data sheet. 2.2.3 Feedforward Capacitor C10 is the feedforward capacitor. If the feedback divider (R1 and R2) has been modified it may be required to adjust the value of the feedforward capacitor as well. For recommended values, see the TPS62816-Q1 Low Input Voltage, Adjustable-Frequency Step-Down Converter data sheet. 2.2.4 Soft-Start Time C9 controls the soft-start time of the output voltage. It can be changed for a faster or slower ramp up of the output voltage. For recommended capacitor values, see the TPS62816-Q1 Low Input Voltage, AdjustableFrequency Step-Down Converter data sheet. 2.2.5 Tracking A control voltage connected to J4 can be used to control the output voltage. For more details see the TPS62816Q1 Low Input Voltage, Adjustable-Frequency Step-Down Converter data sheet. 2 TPS62816EVM-140 Evaluation Module SLVUC10 – MARCH 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Introduction 2.2.6 Switching Frequency and Control Loop Compensation R4 controls the switching frequency of the converter. It is also used to select a predefined control loop compensation setting. For recommended values, see the TPS62816-Q1 Low Input Voltage, AdjustableFrequency Step-Down Converter data sheet. SLVUC10 – MARCH 2021 Submit Document Feedback TPS62816EVM-140 Evaluation Module Copyright © 2021 Texas Instruments Incorporated 3 www.ti.com Setup 3 Setup This section describes how to correctly use the TPS62816EVM-140. 3.1 Connector Descriptions J1, Pin 1, 2 and 3 – VIN Positive input voltage connection from the input supply for the EVM J1, Pin 4, 5 and 6 – GND Input return connection from the input supply for the EVM J2, Pin 1, 2 and 3 – VOUT Positive output voltage connection J2, Pin 4, 5 and 6 – GND Output return connection JP1 – EN EN pin jumper. Place the supplied jumper across ON and EN to turn on the IC. Place the jumper across OFF and EN to turn off the IC. JP2 – MODE/SYNC MODE/SYNC pin jumper. Place the supplied jumper across VIN and MODE/SYNC to force the device in fixed frequency PWM operation at all load currents. Place the jumper across MODE/SYNC and GND to enable power save mode. Connect a clock signal to MODE/SYNC referenced to GND to synchronize the switching frequency to the clock signal. J3 – PG The PG output appears on pin 1 of this header with a convenient ground on pin 2. J4 – SS/TR SS/TR input, a voltage connected on pin 1 of this header referenced to GND on pin 2 can be used to control the output voltage (tracking). 3.2 Hardware Setup To operate the EVM, set jumpers JP1 and JP2 to the desired positions per Section 3.1. Connect the input supply to J1, between VIN and GND and connect the load to J2 between VOUT and GND. 4 TPS62816EVM-140 Test Results The TPS62816EVM-140 was used to take the typical characteristics data in the TPS62816-Q1 data sheet. See TPS62816-Q1 Low Input Voltage, Adjustable-Frequency Step-Down Converter data sheet for the performance of this EVM. 5 Board Layout This section provides the TPS62816EVM-140 board layout. The Gerber files are available on the TPS62816EVM-140 tool page Figure 5-1. Top Silk 4 TPS62816EVM-140 Evaluation Module SLVUC10 – MARCH 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated Board Layout www.ti.com Figure 5-2. Top Layer Figure 5-3. Layer 2 Figure 5-4. Layer 3 SLVUC10 – MARCH 2021 Submit Document Feedback TPS62816EVM-140 Evaluation Module Copyright © 2021 Texas Instruments Incorporated 5 www.ti.com Board Layout Figure 5-5. Layer 4 Figure 5-6. Layer 5 Figure 5-7. Bottom Layer 6 TPS62816EVM-140 Evaluation Module SLVUC10 – MARCH 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated www.ti.com Schematic 6 Schematic Figure 6-1. TPS62816EVM-140 Schematic SLVUC10 – MARCH 2021 Submit Document Feedback TPS62816EVM-140 Evaluation Module Copyright © 2021 Texas Instruments Incorporated 7 List of Materials www.ti.com 7 List of Materials Table 7-1 TPS62816EVM-140 list of materials. Table 7-1. TPS62816EVM-140 List of Materials 8 QTY REF DES VALUE DESCRIPTION SIZE Part Number MFR 1 C1 0.47 µF Ceramic capacitor, 10 V, X7S 0402 GCM155C71A474KE36 MuRata 1 C9 0.015 µF Ceramic capacitor, 50 V, COG/NPO 0402 1 C10 10 pF Ceramic capacitor, 50 V, COG/NPO 0402 4 C2, C3, C11,C12 2.2 µF Ceramic capacitor, 6.3 V, X7R 0603 GCM188R70J225KE22 MuRata 4 C4, C5, C13,C14 10 µF Ceramic capacitor, 10 V, X7R 0805 GCM21BR71A106KE22 MuRata 6 C6, C7, C15,C16,C1 7,C18 22 µF Ceramic capacitor, 10 V, X7R 1206 GCM31CR71A226KE02 MuRata any any 1 C8 100 µF Polymer capacitor, 20 V 7.3 x 4.3 mm 20TQC100MYF Panasonic 1 L1 250 nH Inductor 4.0 x 4.0 x 2.0 mm XGL4020-251MEC Coilcraft 1 R1 80.6 kΩ Resistor 1%, 0.1 W 0402 any 1 R2 40.2 kΩ Resistor 1%, 0.1 W 0402 any 1 R3 100 kΩ Resistor 1%, 0.1 W 0402 any 1 R4 8.06 kΩ Resistor 1%, 0.1 W 0402 1 U1 Low Input Voltage, Adjustable-Frequency Step-down Converter VQFN-HR-9 TPS62816EVM-140 Evaluation Module any TPS62816QWRWYRQ1 Texas Instruments SLVUC10 – MARCH 2021 Submit Document Feedback Copyright © 2021 Texas Instruments Incorporated 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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