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1 Introduction

The TPS62843x is a family of synchronous, step-down converters in a 0.8-mm × 1.05-mm wafer chip-scale 
package (WCSP) with a 0.4-mm pitch. The BSR167 EVM contains three completely independent circuits, each 
for a different IC version. See 

Table 1-1

 for a summary of the BSR167 EVMs.

The reference designator order is grouped by sub-circuit. Reference designators beginning with 

1

 (for example, 

R1x, J1x, C1x) are part of one sub-circuit. The second digit of each reference designator is the same for the 
same component in different sub-circuits. R11, R21, and R31, for example, refer to the same resistor in each 
sub-circuit.

Table 1-1. BSR167 Circuit Options

EVM Version

IC Installed

Output Voltage Setpoint

Output Voltage

Setpoint Range

Output Current

TPS628436-7-8EVM167 

(BSR167-001)

TPS628436 (U11)

0.6 V

0.4-0.8 V (adjustable)

600 mA

TPS628437 (U21)

0.9 V

0.8-1.8 V (adjustable)

600 mA

TPS628438 (U31)

1.8 V

1.8-3.6 V (adjustable)

600 mA

1.1 Performance Specification

Table 1-2

 provides a summary of the TPS628436-7-8EVM-167 performance specifications.

Table 1-2. Performance Specification Summary

SPECIFICATION

MIN

TYP

MAX

UNIT

Input voltage

1.8

3.6

5.5

V

Output voltage setpoint

See 

Table 1-1

V

Output current

0

See 

Table 1-1

mA

1.2 Modifications

The printed circuit board (PCB) for this EVM is designed to accommodate all the output voltage versions of this 
integrated circuit (IC). Extra input and output capacitors can also be added. Finally, the loop response of the IC 
can be measured by configuring the board.

1.2.1 Adjusting the Output Voltage

The output voltage can be adjusted through the choice of Rx1 and Rx2 resistors. Since Rx1 and Rx2 are in 
parallel, only Rx1 or Rx2 should be installed one at a time. Rx1 is an 0201 size to represent a typical solution in 
actual application. However, such a small size is difficult to replace. Therefore, Rx2 is provided in an 0603 size to 
change the output voltage easily. Simply remove Rx1 and place the desired value to Rx2.

1.2.2 Input and Output Capacitors

Cx2 provides an additional input capacitor. This capacitor is not required for proper operation but can be used to 
reduce the input voltage ripple.

Cx5, Cx6, and Cx7 are options for additional output capacitors. These capacitors are not mandatory for the 
device's proper operation. But it can be used to reduce the output voltage ripple and improve the load transient 
response. The total output capacitance must remain within the recommended range in the data sheet for proper 
operation.

1.2.3 Loop Response Measurement

The loop response of the EVM can be measured with two simple changes to the circuitry. First, cut the trace 
between the VOS pin and the output capacitor on the top layer. This change is shown in 

Figure 1-1

. Second, 

place a 10-Ω resistor across the resistor pads on the back of the PCB at Rx3. The pads are spaced to 
allow installation of an 0603-sized resistor. With these changes, an ac signal (100-mV, peak-to-peak amplitude 
recommended) can be injected into the control loop across the added resistor. Details of measuring the control 
loop of DCS-Control devices are found in 

How to Measure the Control Loop of DCS-Control™ Devices

.

Introduction

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2

TPS628436-7-8EVM-167 Evaluation Module

SLUUCG5 – NOVEMBER 2021

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Copyright © 2021 Texas Instruments Incorporated

Summary of Contents for TPS628436-7-8EVM-167

Page 1: ...odifications 2 2 Setup 4 2 1 Input Output Connector Descriptions 4 2 2 Setup 4 3 Board Layout 5 4 Schematic 7 5 List of Materials 9 List of Figures Figure 1 1 Loop Response Measurement Modification 3...

Page 2: ...ut voltage can be adjusted through the choice of Rx1 and Rx2 resistors Since Rx1 and Rx2 are in parallel only Rx1 or Rx2 should be installed one at a time Rx1 is an 0201 size to represent a typical so...

Page 3: ...Shown Figure 1 1 Loop Response Measurement Modification www ti com Introduction SLUUCG5 NOVEMBER 2021 Submit Document Feedback TPS628436 7 8EVM 167 Evaluation Module 3 Copyright 2021 Texas Instruments...

Page 4: ...ections Measure the output voltage at this point Jx2 Pin 5 and 6 GND Output return connection JPx1 EN EN pin input jumper Place the supplied jumper across ON and EN to turn on the IC Place the jumper...

Page 5: ...VM 167 board layout and illustrations in Figure 3 1 through Figure 3 3 Figure 3 1 Top Assembly www ti com Board Layout SLUUCG5 NOVEMBER 2021 Submit Document Feedback TPS628436 7 8EVM 167 Evaluation Mo...

Page 6: ...igure 3 2 Top Layer Figure 3 3 Bottom Layer Board Layout www ti com 6 TPS628436 7 8EVM 167 Evaluation Module SLUUCG5 NOVEMBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporate...

Page 7: ...Figure 4 2 illustrates the TPS628437 EVM schematic GND S S VOUT 0 8V 1 8V VIN 1 8V to 5 5V S S GND VIN1 ON EN OFF GND1 VIN1 600mA GND1 GND1 47uF C23 4 7uF C21 4 7uF C22 VOUT1 4 7uF C26 10 0 R23 10uF C...

Page 8: ...F C36 10 0 R33 10uF C34 10uF C35 GND2 GND2 GND2 1 H L31 5 4 1 2 3 6 J31 5 4 1 2 3 6 J32 1 2 3 JP31 VIN B1 EN C2 SW B2 VOS A2 VSET C1 GND A1 TPS628438YKAR U31 0 R34 10uF C37 10 0k R32 10 0k R31 Figure...

Page 9: ...15L Murata C24 1 CAP CERM 10 F 6 3 V 20 X5R 0402 GRM155R60J106ME15D Murata L21 1 Inductor Shielded Metal Composite 1 H 2 7 A 0 057 ohm SMD DFE201610E 1R0M P2 Murata R21 1 RES 15 4 k 1 0 05 W 0201 Std...

Page 10: ...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...

Page 11: ...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...

Page 12: ...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...

Page 13: ...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...

Page 14: ...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...

Page 15: ...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 thes...

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