Texas Instruments TPS53119EVM-690 User Manual
TPS53119EVM-690 User Guide
The TPS53119EVM-690 evaluation module allows users to evaluate the Texas Instruments TPS53119, a
small-sized, single, buck controller with adaptive on-time D-CAP™ mode control. Included in this
document are operating and testing descriptions as well as the EVM schematic, bill of materials, and
board layout.
Contents
1 Introduction ................................................................................................................... 3
2 Description.................................................................................................................... 3
2.1 Typical Applications ................................................................................................ 3
2.2 Features.............................................................................................................. 3
3 Electrical Performance Specifications..................................................................................... 4
4 Schematic..................................................................................................................... 5
5 Test Setup .................................................................................................................... 6
5.1 Test Equipment ..................................................................................................... 6
5.2 Recommended Test Setup ........................................................................................ 7
6 Configurations................................................................................................................ 7
6.1 Switching Frequency Selection .................................................................................. 7
6.2 Soft-Start Selection................................................................................................. 8
6.3 Mode Selection...................................................................................................... 8
6.4 Enable Selection.................................................................................................... 8
7 Test Procedure............................................................................................................... 9
7.1 Line/Load Regulation and Efficiency Measurement Procedure .............................................. 9
7.2 Control Loop Gain and Phase Measurement Procedure...................................................... 9
7.3 List of Test Points ................................................................................................. 10
7.4 Equipment Shutdown ............................................................................................. 10
8 Performance Data and Typical Characteristic Curves................................................................. 11
8.1 Efficiency ........................................................................................................... 11
8.2 Load Regulation ................................................................................................... 11
8.3 Output Transient................................................................................................... 12
8.4 Output Ripple ...................................................................................................... 13
8.5 Switching Node.................................................................................................... 13
8.6 Enable Turnon/Turnoff............................................................................................ 14
8.7 Output 1.1-V Prebias Turnon .................................................................................... 15
8.8 Bode Plot........................................................................................................... 15
8.9 Thermal Image..................................................................................................... 16
9 EVM Assembly Drawing and PCB Layout .............................................................................. 17
10 Bill of Materials ............................................................................................................. 21
User's Guide
SNVU589–December 2017
1 TPS53119EVM-690 Schematic............................................................................................ 5
2 Tip and Barrel Measurement for Vout Ripple ............................................................................ 6
3 TPS53119EVM-690 Recommended Test Setup ........................................................................ 7
4 Efficiency .................................................................................................................... 11
5 Load Regulation ............................................................................................................ 11
6 Output Load Transient..................................................................................................... 12
7 Output Load Transient..................................................................................................... 12
SNVU589–December 2017
Submit Documentation Feedback
List of Figures
Copyright © 2017, Texas Instruments Incorporated
TPS53119EVM-690 User Guide
1
www.ti.com
8 Output Ripple ............................................................................................................... 13
9 Switching Node............................................................................................................. 13
10 Enable Turnon.............................................................................................................. 14
11 Enable Turnoff.............................................................................................................. 14
12 Output 1.1-V Prebias Turnon............................................................................................. 15
13 Bode Plot at 12 V
14 Top Board at 12 V
15 Bottom Board at 12 V
, 1.1 V/25 A........................................................................................... 15
IN
, 1.1 V/25 A.......................................................................................... 16
IN
, 1.1 V/25 A ..................................................................................... 16
IN
16 TPS53119EVM-690 Top Layer Assembly Drawing, Top View....................................................... 17
17 TPS53119EVM-690 Bottom Assembly Drawing, Bottom View ...................................................... 17
18 TPS53119EVM-690 Top Copper, Top View............................................................................ 18
19 TPS53119EVM-690 Layer-2 Copper, Top View ....................................................................... 18
20 TPS53119EVM-690 Layer-3 Copper, Top View ....................................................................... 19
21 TPS53119EVM-690 Layer-4 Copper, Top View ....................................................................... 19
22 TPS53119EVM-690 Layer-5 Copper, Top View ....................................................................... 20
23 TPS53119EVM-690 Bottom Layer Copper, Top View ................................................................ 20
List of Tables
1 TPS53119EVM-690 Electrical Performance Specifications............................................................ 4
2 Switching Frequency Selection ............................................................................................ 8
3 Soft-Start Selection.......................................................................................................... 8
4 MODE Selection ............................................................................................................. 8
5 Enable Selection............................................................................................................. 8
6 Functions of Each Test Points............................................................................................ 10
7 The EVM Bill of Materials According to Schematic Shown in ....................................................... 21
Trademarks
D-CAP is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.
2
TPS53119EVM-690 User Guide
Copyright © 2017, Texas Instruments Incorporated
SNVU589–December 2017
Submit Documentation Feedback
www.ti.com
1 Introduction
The TPS53119EVM-690 evaluation module (EVM) uses the TPS53119 device. The TPS53119 is a smallsize, single buck controller with adaptive on-time D-CAP™ mode control. It provides a fixed 1.1-V output
at up to 25 A from a 12-V input bus. TPS53119EVM-690 also uses the 5-mm × 6-mm TI power block
MOSFET (CSD86350Q5D) for high power density and superior thermal performance.
2 Description
The TPS53119EVM-690 is designed to use a regulated 12-V bus to produce a regulated 1.1-V output at
up to 25 A of load current. The TPS53119EVM-690 is designed to demonstrate the TPS53119 in a typical
low-voltage application while providing test points to evaluate the performance of the TPS53119.
2.1 Typical Applications
• Point of load systems
• Storage computer
• Server computer
• Multifunction printer
• Embedded computing
2.2 Features
The TPS53119EVM-690 features:
• 25-Adc, steady-state output current
• Support prebias output voltage start-up
• High efficiency and high power density by using TI power block MOSFET
• J1 for selectable switching frequency setting
• J2 for selectable internal voltage servo soft start
• J3 for enable function
• J6 for auto-skip and forced CCM selection
• Convenient test points for probing critical waveforms
Introduction
SNVU589–December 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS53119EVM-690 User Guide
3
Electrical Performance Specifications
3 Electrical Performance Specifications
Table 1. TPS53119EVM-690 Electrical Performance Specifications
www.ti.com
PARAMETER TEST CONDITIONS MIN TYP
MA
UNIT
X
INPUT CHARACTERISTICS
Voltage range V
IN
Maximum input current VIN= 8 V, I
No load input current VIN= 14 V, I
= 25 A 4 A
OUT
= 0 A with auto-skip mode 1 mA
OUT
8 12 14 V
OUTPUT CHARACTERISTICS
Output voltage VOUT 1.1 V
Output voltage regulation Line regulation(VIN= 8 V-14 V) 0.5%
Load regulation(VIN= 12 V, I
= 0 A-25 A) 0.5%
OUT
Output voltage ripple VIN= 12 V, Io = 25 A 25 mVpp
Output load current 0 25 A
Output over current 35 A
SYSTEMS CHARACTERISTICS
Switching frequency 300 kHz
Peak efficiency VIN= 12 V, 1.1 V/10 A 90.90%
Full-load efficiency VIN= 12 V, 1.1 V/25 A 88.59%
Operating temperature 25 ºC
Note: Jumpers set to default locations, See Section 6 of this user’s guide
4
TPS53119EVM-690 User Guide
Copyright © 2017, Texas Instruments Incorporated
SNVU589–December 2017
Submit Documentation Feedback
1000KHz
650KHz
300KHz
2.8ms SS
500KHz
750KHz
850KHz
250KHz
400KHz
FCCM
AUTOSKI
P
1.4ms SS
5.6ms SS
0.7ms SS
Note:
+
+ +
www.ti.com
4 Schematic
Schematic
SNVU589–December 2017
Submit Documentation Feedback
Figure 1. TPS53119EVM-690 Schematic
Copyright © 2017, Texas Instruments Incorporated
TPS53119EVM-690 User Guide
5
TP15TP14
Metal Ground Barrel
Probe Tip
Test Setup
5 Test Setup
5.1 Test Equipment
Voltage Source: The input voltage source VINmust be a 0-V to 14-V variable dc source capable of
supplying 10 Adc. Connect Vin to J4 as shown in Figure 3.
Multimeters:
V1: VINat TP7 (Vin) and TP8 (GND).
V2: V
A1: Vin input current
Output Load: The output load must be an electronic constant resistance mode load capable of 0 Adc to
30 Adc at 1.1 V.
Oscilloscope: A digital or analog oscilloscope can be used to measure the output ripple. The oscilloscope
must be set for 1-MΩ impedance, 20-MHz bandwidth, ac coupling, 2-µs/division horizontal resolution, 50mV/division vertical resolution. Test points TP14 and TP15 can be used to measure the output ripple
voltage by placing the oscilloscope probe tip through TP14 and holding the ground barrel on TP15 as
shown in Figure 2. Using a leaded ground connection may induce additional noise due to the large ground
loop.
at TP14 (Vout) and TP15 (GND).
OUT
www.ti.com
Fan: Some of the components of this EVM may approach temperatures of 60°C during operation. A small
fan capable of 200-400 LFM is recommended to reduce component temperatures while the EVM is
operating. The EVM must not be probed if the fan is not running.
Recommended Wire Gauge:
1. VINto J4 (12-V input):
2. J5 to LOAD:
Figure 2. Tip and Barrel Measurement for Vout Ripple
The recommended wire size is 1 × AWG 14 per input connection, with the total length of wire less than
4 feet (2-foot input, 2-foot return).
The minimum recommended wire size is 2 × AWG 14, with the total length of wire less than 4 feet (2foot output, 2-foot return)
6
TPS53119EVM-690 User Guide
Copyright © 2017, Texas Instruments Incorporated
SNVU589–December 2017
Submit Documentation Feedback
T
I
NSTRUMENTS
EXAS
V1
A1
DC
Source
Vin
-
Load
+
V2
FAN
+
-
www.ti.com
5.2 Recommended Test Setup
Test Setup
Figure 3. TPS53119EVM-690 Recommended Test Setup
Figure 3 is the recommended test setup to evaluate the TPS53119EVM-690. Working at an ESD
workstation, make sure that any wrist straps, bootstraps, or mats are connected referencing the user to
earth ground before power is applied to the EVM.
Input Connections:
1. Prior to connecting the dc input source VIN, it is advisable to limit the source current from VINto 10 A
maximum. Ensure that VINis initially set to 0 V and connected as shown in Figure 3.
2. Connect a voltmeter V1 at TP7 (VIN) and TP8 (GND) to measure the input voltage.
3. Connect a current meter A1 to measure the input current.
Output Connections:
1. Connect load to J5, and set Load to constant resistance mode to sink 0 Adc before VINis applied.
2. Connect a voltmeter V2 at TP14 (V
) and TP15 (GND) to measure the output voltage.
OUT
Other Connections:
Place a fan as shown in Figure 3 and turn it on, ensuring that air is flowing across the EVM.
6 Configurations
All jumper selections must be made prior to applying power to the EVM. Users can configure this EVM per
the following configurations.
6.1 Switching Frequency Selection
The switching frequency can be set by J1.
Default setting: 300 kHz
SNVU589–December 2017
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
TPS53119EVM-690 User Guide
7
Loading...