background image

22uF

C2

VIN = 4.5V - 18V/5A

VOUT = 1.05V/6A

GND

22uF

C3

0

R1

0.1uF

C14

100k

R7

PG

VIN

TP5

TP7

TP14

VOUT

SW

VBST

0.1uF

C5

GND

TP4

TP13

TP1

TP3

100k

R4

EN

VCC

VIN

TP2

1
2

J1

1

2

J2

TP6

TP16

TP9

100k

R5

GND

TP15

FB

TP8

0.1uF

C4

5.1V

D1

1uF

C12

22uF

C6

22uF

C7

22uF

C8

0.1uF

C11

0

R6

DNP

49.9

R2

GND

1
2
3

JP1

100k -- OOA

1

2

3

4

5

6

J3

100k

R10

MODE

0

R9

GND -- PSM

VCC -- FCCM

VCC

1uH

L1

PGND

2

VIN

1

PGND

4

PGND

3

EN

5

PGND

6

MODE

7

SW

8

VBST

9

VCC

10

AGND

11

VFB

12

PG

13

U1

TPS566235RJNR

GND

GND

TP11

MODE

22uF

C1

DNP

22uF

C9

DNP

22uF

C10

DNP

100pF

C13

DNP

MODE selection:

TP10

TP12

GND

GND

15.0k

R3

20.0k

R8

www.ti.com

Modifications

3

SLUUC03 – February 2019

Submit Documentation Feedback

Copyright © 2019, Texas Instruments Incorporated

TPS566235EVM-036 evaluation module

3.2

Mode Selection

TPS566235 has a MODE pin to select 3 different operation mode at light load. The device reads the
voltage on MODE pin during start-up and latches onto one of the MODE options listed below in

Table 2

.

Table 2. MODE Pin Resistor Setting

V

MODE

RECOMMENDED MODE RESISTOR R

M

OPERATION MODE

0 - 0.3 V

0

Ω

Eco-Mode

0.3 V - 1.2 V

100 k

Ω

- 150 k

Ω

Out-of-Audio (OOA)

> 1.2 V

Connected to VCC pin (recommend) or >

400 k

Ω

Forced CCM (FCCM)

Changing the position of jumper on J3 can modify MODE pin configuration before power on.

4

Schematic and Board layout

4.1

Schematic

Figure 1

illustrates TPS566235EVM-036 Evaluation Module schematic.

Figure 1. TPS566235EVM-036 Evaluation Module Schematic

4.2

Board Layout

Figure 2

through

Figure 6

illustrates the TPS566235EVM-036 board layout. The top layer contains the

main power traces for V

IN

, V

OUT

, and SW, there is a large area filled with ground. The internal layer-1 and

layer-2 are ground plane. The bottom layer is another ground plane. The ground traces of each layer are
connected together with multiple VIAs. The top and bottom layers are 2-oz copper and internal layers are
1-oz copper.

Summary of Contents for TPS566235EVM-036

Page 1: ...p Procedure 9 6 Test Waveforms 9 6 1 Power up 9 6 2 Power down 9 6 3 Output Voltage Ripple 10 6 4 Load Transient Response 11 6 5 Thermal 12 7 List of Materials and Reference 12 7 1 List of Materials 1...

Page 2: ...good indicator and full protections including UVLO OCP OVP UVP OTP The devices are available in 3 0 mm 2 0 mm HotRod package and the die operating temperature is specified from 40 C to 125 C TPS566235...

Page 3: ...e at light load The device reads the voltage on MODE pin during start up and latches onto one of the MODE options listed below in Table 2 Table 2 MODE Pin Resistor Setting VMODE RECOMMENDED MODE RESIS...

Page 4: ...yout www ti com 4 SLUUC03 February 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated TPS566235EVM 036 evaluation module Figure 2 Component Placement Top Layer Figure 3 B...

Page 5: ...and Board layout 5 SLUUC03 February 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated TPS566235EVM 036 evaluation module Figure 4 Board Layout Second Layer Figure 5 Boar...

Page 6: ...t connectors and test points as listed in Table 3 And Figure 7 and Figure 8 shows connectors and jumpers placement on TPS566235EVM 036 board A power supply capable of supplying greater than 5 A must b...

Page 7: ...ODE GND GND JP1 EN www ti com EVM Test Setup 7 SLUUC03 February 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated TPS566235EVM 036 evaluation module Figure 7 Connectors...

Page 8: ...2 for operation mode selection JP1 Enable disable control Middle pin is IC s EN pin Floating EN or shunting to GND will disable IC Shunting EN to the other side will enable IC TP1 TP2 VIN test point...

Page 9: ...nnector 5 Check the VOUT Start up with VIN control enable signal 1 Select operation mode at J3 2 Connect JP1 1 pin to JP1 2 pin with jumper cap 3 Apply 4 5 V 18 V power supply to J1 4 Apply load to J2...

Page 10: ...Copyright 2019 Texas Instruments Incorporated TPS566235EVM 036 evaluation module Figure 10 Power Down with 6 A Loading Controlled by EN Pin 6 3 Output Voltage Ripple Figure 11 and Figure 12 show the V...

Page 11: ...Incorporated TPS566235EVM 036 evaluation module Figure 12 VOUT Ripple with 6 A Loading 6 4 Load Transient Response Figure 13 and Figure 14 show load transient response at 12 V input and 1 05 V output...

Page 12: ...ated TPS566235EVM 036 evaluation module Figure 14 Load Transient Response from 1 2 A to 4 8 A with R6 0 and C13 100 pF 6 5 Thermal Figure 15 shows the thermal information at 12 V input 1 05 V output 6...

Page 13: ...olutions L1 1 Inductor shielded drum core WE superflux200 1 uH 15 A 0 0046 SMD 744311100 Wurth Elektronik R1 R9 2 Resistor 0 5 0 1 W 0603 RC0603JR 070RL Yageo R2 1 Resistor 49 9 1 0 1 W 0603 CRCW06034...

Page 14: ...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 15: ...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 16: ...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 17: ...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 18: ...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 19: ...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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