LM5122EVM-2PH Evaluation Module
User's Guide
Literature Number: SNVU205
APRIL 2013
Contents
1
2
3
Introduction ........................................................................................................................ 4
Features and Electrical Performance ..................................................................................... 4
Test Points ......................................................................................................................... 4
4
Test Equipment
7
8
9
............................................................................................................... 4
................................................................................................................... 5
4.1
Power Supply ............................................................................................................ 5
4.2
Electronic Load .......................................................................................................... 5
4.3
Meters ..................................................................................................................... 5
4.4
Oscilloscope .............................................................................................................. 5
Test Setup and Procedure .................................................................................................... 5
5.1
Precaution & Wire Gauge .............................................................................................. 5
5.2
Test Setup ................................................................................................................ 6
5.3
Quick Test Procedure ................................................................................................... 6
Performance Curves ............................................................................................................ 6
6.1
Efficiency ................................................................................................................. 6
6.2
Load Transient ........................................................................................................... 7
6.3
Interleaving ............................................................................................................... 7
6.4
Light Load Operations .................................................................................................. 8
6.5
Startup .................................................................................................................... 9
6.6
Loop Response .......................................................................................................... 9
Schematic ......................................................................................................................... 10
Layout .............................................................................................................................. 12
Bill of Materials ................................................................................................................. 15
2
Table of Contents
3.1
5
6
Test Points
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
www.ti.com
List of Figures
1
Connection Diagram ........................................................................................................ 5
2
Efficiency ..................................................................................................................... 6
3
Load Transient
4
Interleaving................................................................................................................... 7
5
Pulse Skip .................................................................................................................... 8
6
Skip Cycle .................................................................................................................... 8
7
Forced PWM ................................................................................................................. 8
8
Startup ........................................................................................................................ 9
9
Loop Response.............................................................................................................. 9
10
Schematic (Power Block) ................................................................................................. 10
11
Schematic (Control Block) ................................................................................................ 11
12
Top Silk (Top View) ....................................................................................................... 12
13
Bottom Silk (X-Ray View)
14
Top Copper (Top View) ................................................................................................... 13
15
Mid1 Copper (X-Ray View) ............................................................................................... 13
16
Mid2 Copper (X-Ray View) ............................................................................................... 14
17
Bottom Copper (X-Ray View) ............................................................................................ 14
..............................................................................................................
................................................................................................
7
12
List of Tables
1
Electrical Performance Specifications .................................................................................... 4
2
Pin Descriptions ............................................................................................................. 4
3
Bill of Materials............................................................................................................. 15
SNVU205 – APRIL 2013
Submit Documentation Feedback
List of Figures
Copyright © 2013, Texas Instruments Incorporated
3
User's Guide
SNVU205 – APRIL 2013
LM5122EVM-2PH Evaluation Module
1
Introduction
The LM5122EVM-2PH evaluation module (EVM) provides the design engineer with a fully functional dual
phase synchronous boost converter to evaluate the Texas Instruments LM5122 synchronous boost
controller device. The EVM provides 28 V output at up to 7 A current from a 9 V to 20 V input. The EVM is
designed to start up from a single power supply without any additional bias voltage.
2
Features and Electrical Performance
•
•
•
•
•
9 V to 20 V input voltage range
28 V target output voltage
Up to 7 A output current
250 kHz typical switching frequency
Dual phase interleaved operation
Table 1. Electrical Performance Specifications
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
9
12
20
UNITS
Input Characteristics
Input Voltage
Input Current
VSUPPLY = 12 V, ILOAD = 7A
17
V
A
Output Characteristics
Output Voltage
ILOAD = 7A
27.02
28
Output Current
28.98
V
7
A
System Characteristics
Switching Frequency
Full Load Efficiency
3
Test Points
3.1
Test Points
250
VSUPPLY = 12 V
96%
VSUPPLY = 20 V
98%
kHz
Table 2. Pin Descriptions
PIN NAME
4
DESCRIPTIONS
TP7, TP8
Power Ground
TP5, TP9, TP10
Analog Ground
TP6
UVLO
J1#1
External Synchronization Pulse Positive Input
J1#2
External Synchronization Pulse Negative Input
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Test Equipment
www.ti.com
4
Test Equipment
4.1
Power Supply
Power Supply should be capable of 20 V / 25 A, current monitoring and remote sensing.
4.2
Electronic Load
Electronic load should be capable of 32 V / 7 A. Use Constant Current (CC) mode.
4.3
Meters
One current meter is required to measure input current accurately. Maximum current rating of the meter
should be carefully considered. Input current can be as high as 25 A at full load current and minimum
input voltage. Output voltage is monitored by a voltage meter which should be capable of monitoring up to
32 V.
4.4
Oscilloscope
Oscilloscope and 10x probe with at least 20 MHz bandwidth are required.
5
Test Setup and Procedure
Oscilloscope
Voltage Meter
Electronic Load
-
-
-s
+
+s
+
Power Supply
V
COM
A
COM
Ampere Meter
Figure 1. Connection Diagram
5.1
Precaution & Wire Gauge
Prolonged operation with low input voltage at full power will cause heating of the MOSFETs. A fan with a
minimum of 200LFM should be always provided.
Wire gauge for the input power supply should be 6-8 AWG minimum and no longer than 1 foot each for
VIN and GND. Wire gauge for the output electronic load should be 12 AWG minimum and no longer than
1 foot each for VOUT and GND.
SNVU205 – APRIL 2013
Submit Documentation Feedback
LM5122EVM-2PH Evaluation Module
Copyright © 2013, Texas Instruments Incorporated
5
Performance Curves
5.2
www.ti.com
Test Setup
5.2.1
Power Supply
Connect the power supply’s positive terminal (+) to ‘A’ terminal of ampere meter and negative terminal (-)
to TP4 GND. Connect the power supply’s positive remote sense terminal to TP2 VIN and negative remote
sense terminal to TP4 GND.
5.2.2
Meter
Connect ‘COM’ terminal of ampere meter to TP2 VIN. Double check ‘A’ terminal is connected to the power
supply’s positive terminal.
Voltage meter is used to measure output voltage. Connect positive terminal (V) of the voltage meter to
TP1 VOUT and negative terminal (COM) of the voltage meter to TP3 GND.
5.2.3
Load
Connect electronic load’s positive terminal (+) to TP1 VOUT and negative terminal (-) to TP3 GND.
5.3
Quick Test Procedure
5.3.1
•
•
•
•
Startup
Set load current to 0 A and turn the load on
Set power supply current limit to 25 A
Turn on the power supply and increase voltage slowly up to 20 V
Increase load current slowly up to 7 A
5.3.2
Shutdown
• Turn off the load
• Decrease the input voltage down to 0 V
• Turn on the load and discharge output capacitor
6
Performance Curves
The following curves are presented for reference, the actual field data may differ from these curves. Actual
performance data can be affected by measurement techniques, equipment setting and environmental
variables.
6.1
Efficiency
100
EFFICIENCY [%]
95
VSUPPPLY = 20V
VSUPPLY = 9V
90
VSUPPLY = 12V
85
FSW = 250 kHz
VOUT = 28V
80
0
2
4
6
LOAD CURRENT [A]
8
C001
Figure 2. Efficiency
6
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Performance Curves
www.ti.com
6.2
Load Transient
VSUPPLY = 12 V, 3.5 A to 7 A and 7 A to 3.5 A load transient
C1: VOUT
Figure 3. Load Transient
6.3
Interleaving
VSUPPLY = 12 V
C1: SW1, C2: SW2
Figure 4. Interleaving
SNVU205 – APRIL 2013
Submit Documentation Feedback
LM5122EVM-2PH Evaluation Module
Copyright © 2013, Texas Instruments Incorporated
7
Performance Curves
6.4
www.ti.com
Light Load Operations
Forced PWM (FPWM) and Skip Cycle mode can be configured by controlling MODE pin voltage.
VSUPPLY = 12 V, ILOAD = 0 A
C1:SW1
Figure 5. Pulse Skip
C1: SW1
Figure 6. Skip Cycle
C1: SW1
Figure 7. Forced PWM
8
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Performance Curves
www.ti.com
6.5
Startup
VSUPPLY = 12 V, ILOAD = 0 A
C1: VOUT, C2: SS, C4: VSUPPLY
Figure 8. Startup
Loop Response
40
180
GAIN [dB]
30
PHASE
VSUPPLY = 12V
ILOAD = 7.0A
135
20
90
10
45
0
0
-10
GAIN
PHASE [°]
6.6
-45
-20
-90
-30
-135
-40
100
1000
10000
FREQUENCY [Hz]
-180
100000
C002
Figure 9. Loop Response
SNVU205 – APRIL 2013
Submit Documentation Feedback
LM5122EVM-2PH Evaluation Module
Copyright © 2013, Texas Instruments Incorporated
9
Schematic
7
www.ti.com
Schematic
Figure 10. Schematic (Power Block)
10
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Schematic
www.ti.com
Figure 11. Schematic (Control Block)
SNVU205 – APRIL 2013
Submit Documentation Feedback
LM5122EVM-2PH Evaluation Module
Copyright © 2013, Texas Instruments Incorporated
11
Layout
8
www.ti.com
Layout
The LM5122 2-phase EVM has been designed using a 4-layer board. Most of components are on the top
to allow the user to easily view, probe, and evaluate the LM5122 device.
Figure 12. Top Silk (Top View)
Figure 13. Bottom Silk (X-Ray View)
12
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Layout
www.ti.com
Figure 14. Top Copper (Top View)
Figure 15. Mid1 Copper (X-Ray View)
SNVU205 – APRIL 2013
Submit Documentation Feedback
LM5122EVM-2PH Evaluation Module
Copyright © 2013, Texas Instruments Incorporated
13
Layout
www.ti.com
Figure 16. Mid2 Copper (X-Ray View)
Figure 17. Bottom Copper (X-Ray View)
14
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
Bill of Materials
www.ti.com
9
Bill of Materials
The EVM components are list according to the schematic shown in Figure 10 and Figure 11 .
Table 3. Bill of Materials
REFERENCE
DESIGNATOR
DESCRIPTION
MANUFACTURER
PART NUMBER
QTY
C1, C13
CAP, CER, 470 pF, 100 V, +/-5%, C0G,
0805
MURATA
GRM2165C2A471JA01D
2
C2, C3, C12, C14,
C15
CAP CER 3.3 uF 50 V 10% X7R 1206
TDK
C3216X7R1H335K160AC
5
C4, C5, C6, C16,
C17, C18
CAP CER 10 uF 35 V 10% X7R 1206
Taiyo Yuden
GMK316AB7106KL
6
C7
CAP, CER, 1 uF, 50 V, +/-10%, X7R,
0805
MURATA
GRM21BR71H105KA12L
1
C8, C9, C10, C11
CAP ALUM 330 uF 35 V 20% SMD
Panasonic
EEE-FP1V331AP
4
C19, C20, C29
CAP, CER, 0.1 uF, 25 V, +/-10%, X7R,
0603
MURATA
GRM188R71E104KA01D
3
C21, C22, C25, C26
CAP, CER, 100 pF, 50 V, +/-5%,
C0G/NP0, 0603
MURATA
GRM1885C1H101JA01D
4
C23, C24
CAP, CER, 4.7 uF, 16 V, +/-10%, X7R,
0805
MURATA
GRM21BR71C475KA73L
2
C27, C28, C30
CAP, CER, 0.47 uF, 25 V, +/-10%, X7R,
0603
MURATA
GRM188R71E474KA12D
3
C31
CAP, CER, 330 pF, 50 V, +/-10%, X7R,
0603
KEMET
C0603C331K5RACTU
1
C32
CAP, CER, 0.022 uF, 50 V, +/-10%, X7R,
KEMET
0603
C0603C223K5RACTU
1
R1, R7
RES 8.2 Ω 3/4W 5% 2010 SMD
Vishay
CRCW20108R20JNEF
2
R2, R8
RES, 0.004 Ω, 3 W, 1%, 3015, WIDE
Susumu
KRL7638-C-R004-F-T1
2
R3, R4, R9, R10
RES, 100 Ω, 1%, 0.1 W, 0603
Vishay
CRCW0603100RFKEA
4
R5, R6, R11, R12,
R15, R16, R26, R28,
R35, R36
RES, 0 Ω, 5%, 0.1 W, 0603
Panasonic
ERJ-3GEY0R00V
10
R19, R33
RES, 49.9k Ω, 1%, 0.1 W, 0603
Vishay
CRCW060349K9FKEA
2
R20, R21
RES, 3.3 Ω, 5%, 0.1 W, 0603
Vishay
CRCW06033R30JNEA
2
R24
RES, 8.06k Ω, 1%, 0.1 W, 0603
Vishay
CRCW06038K06FKEA
1
R25, R27
RES, 78.7k Ω, 1%, 0.1 W, 0603
Vishay
CRCW060378K7FKEA
2
R29
RES, 36.5k Ω, 1%, 0.1 W, 0603
Vishay
CRCW060336K5FKEA
1
R31
RES, 59.0k Ω, 1%, 0.1 W, 0603
Vishay
CRCW060359K0FKEA
1
R32
RES, 2.26k Ω, 1%, 0.1 W, 0603
Vishay
CRCW06032K26FKEA
1
R34
RES, 576 Ω, 1%, 0.125 W, 0805
Vishay
CRCW0805576RFKEA
1
D1, D2
Diode, Schottky, 60 V, 1 A, SOD-123F
NXP
PMEG6010CEH
2
Q1, Q2, Q3, Q4
MOSFET N-CH 40 V 100 A LFPAK
NXP
PSMN4R0-40YS
4
MOSFET N-CH 40 V 100 A SON 5x6
Texas Instruments
CSD18501Q5A
L1, L2
SMD Flat Wire WE-HCI, L Ω = 10.0 µH
WURTH
74435561100
2
TP1, TP2, TP3, TP4
Terminal screw, vertical, snap-in
Keystone
7693
4
TP5, TP7, TP8
Test Point, TH, Multipurpose, Black
Keystone
5011
3
TP6
Test Point, TH, Miniature, White
Keystone
5002
1
TP9, TP10
Test Point, TH, Miniature, Black
Keystone
5001
2
H1, H2, H5, H6
Standoff, Hex, 0.5"L #4-40 Nylon
Keystone
1902C
4
H3, H4, H7, H8
Machine Screw, Round, #4-40 x 1/4,
Nylon
B&F
NY PMS 440 0025 PH
4
J1
Header, TH, 100mil, 2x1, Gold plated
SAMTEC
TSW-102-07-G-S
1
U1, U2
Synchronous Boost Controller
Texas Instruments
LM5122MH
2
SNVU205 – APRIL 2013
Submit Documentation Feedback
ALT
LM5122EVM-2PH Evaluation Module
Copyright © 2013, Texas Instruments Incorporated
15
Bill of Materials
16
www.ti.com
LM5122EVM-2PH Evaluation Module
SNVU205 – APRIL 2013
Submit Documentation Feedback
Copyright © 2013, Texas Instruments Incorporated
IMPORTANT NOTICE
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
performed.
TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide
adequate design and operating safeguards.
TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or
endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the
third party, or a license from TI under the patents or other intellectual property of TI.
Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration
and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.
Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.
Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.
In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.
Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and
regulatory requirements in connection with such use.
TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.
Products
Applications
Audio
www.ti.com/audio
Automotive and Transportation
www.ti.com/automotive
Amplifiers
amplifier.ti.com
Communications and Telecom
www.ti.com/communications
Data Converters
dataconverter.ti.com
Computers and Peripherals
www.ti.com/computers
DLP® Products
www.dlp.com
Consumer Electronics
www.ti.com/consumer-apps
DSP
dsp.ti.com
Energy and Lighting
www.ti.com/energy
Clocks and Timers
www.ti.com/clocks
Industrial
www.ti.com/industrial
Interface
interface.ti.com
Medical
www.ti.com/medical
Logic
logic.ti.com
Security
www.ti.com/security
Power Mgmt
power.ti.com
Space, Avionics and Defense
www.ti.com/space-avionics-defense
Microcontrollers
microcontroller.ti.com
Video and Imaging
www.ti.com/video
RFID
www.ti-rfid.com
OMAP Applications Processors
www.ti.com/omap
TI E2E Community
e2e.ti.com
Wireless Connectivity
www.ti.com/wirelessconnectivity
Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
Copyright © 2013, Texas Instruments Incorporated