Using the TPS84410EVM-001,
TPS84210EVM-002, TPS84610EVM-003
User's Guide
Literature Number: SLUU633A
September 2011 – Revised February 2012
User's Guide
SLUU633A – September 2011 – Revised February 2012
TPS84410EVM-001/TPS84210EVM-002/TPS84610EVM-003,
2-A to 6-A Integrated Power Solution
1
Introduction
The TPS84410EVM-001, TPS84210EVM-002, TPS84610EVM-003 Evaluation Module
(TPS84x10EVM-00x) is designed as an easy to use platform that facilitates an extensive evaluation of the
features and performance of the Integrated Power Solution (IPS) devices. The EVM PCB may be
configured with one of three IPS devices (see Table 1).
Table 1. TPS84x10EVM-00x Device Configuration
DEVICE
TITLE
TPS84210
6-V input, 2-A output sync. step-down converter with PWM
TPS84410
6-V input, 4-A output sync. step-down converter with PWM
TPS84610
6-V input, 6-A output sync. step-down converter with PWM
This user guide provides information on the correct usage of the EVM and an explanation of the numerous
test points on the board.
2
Description
The EVM features a TPS84x10 synchronous buck IPS device configured for operation with typical 3.3-V
and 5-V input bus applications. The output voltage can be set to one of five popular values by using a
simple configuration jumper. In similar fashion, the switching frequency can be set to one of four values by
use of a jumper. The full 4-A rated output current can be supplied by the EVM. A minimal amount of input
and output capacitance is used on the board. Component pads are provided for additional input and
output capacitors if desired. Monitoring test points are provided to allow measurement of efficiency, power
dissipation, input ripple, output ripple, line and load regulation, and transient response. Control test points
are provided for use of the PWRGD, Inhibit/UVLO, synchronization, and slow-start/tracking features of the
IPS device. The EVM uses a recommended PCB layout that maximizes thermal performance and
minimizes output ripple and noise.
2
TPS84410EVM-001/TPS84210EVM-002/TPS84610EVM-003, 2-A to 6-A
Integrated Power Solution
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Getting Started
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3
Getting Started
Figure 1 highlights the user interface items associated with the EVM. The polarized VIN Power terminal
block is used for connection to the host input supply and the polarized VOUT Power terminal block is used
for connection to the load. The terminal blocks can except up to 16 AWG wire.
The VIN monitor and VOUT monitor test points located near the power terminal blocks are intended to be
used as voltage monitoring points where voltmeters can be connected to measure VIN and VOUT. The
voltmeter references should be connected to any of the four VIN/VOUT monitor grounds test points located
between the power terminal blocks. Do not use these VIN and VOUT monitoring test points as the input
supply or output load connection points. The PCB traces connecting to these test points are not designed
to support high currents.
Figure 1. TPS84x10EVM-00x User Interface
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3
Getting Started
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The VIN scope and VOUT scope test points can be used to monitor VIN and VOUT waveforms with an
oscilloscope. These test points are intended for use with un-hooded scope probes. The scope probe tip
should be connected to the socket labeled VIN or VOUT, and the scope ground barrel should lean against
to the test point labeled GND. The GND TP may need to be cut or bent slightly to hold the probe barrel.
Metal Ground Barrel
Probe Tip
TP15
TP16
Figure 2. Tip and Barrel Measurement
The control test points located directly below the TPS84x10 IPS device are made available to test the
features of the device. Any external connections made to these test points should be referenced to either
of the two control ground test points located along the bottom of the EVM. Refer to Section 4 of this user
guide for more information on the individual control test points.
The VOUT-select and FSW-select configuration jumpers are provided for selecting the desired output voltage
and appropriate switching frequency. Before applying power to the EVM, ensure that the jumpers are
present and properly positioned for the intended output voltage. Refer to Table 2 for the recommended
jumper settings. Always remove input power before changing the jumper settings.
Once the jumper settings have been confirmed, configure the host input supply to apply the appropriate
bus voltage listed in Table 2 and confirm that the selected output voltage is obtained.
Table 2. Output Voltage and Switching Frequency Jumper Settings
4
VOUT SELECT
TPS84210, FSW
SELECT
TPS84410, FSW
SELECT
TPS84610, FSW
SELECT
VIN BUS VOLTAGE
3.3 V
1.5 MHz
1 MHz
-
5V
2.5 V
1.5 MHz
1 MHz
-
5V
1.8 V
1 MHz
1 MHz
-
5 V or 3.3 V
1.2 V
750 kHz
750 kHz
-
5 V or 3.3 V
0.8 V
650 kHz
650 kHz
-
5 V or 3.3 V
TPS84410EVM-001/TPS84210EVM-002/TPS84610EVM-003, 2-A to 6-A
Integrated Power Solution
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Test Point Descriptions
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4
Test Point Descriptions
Fourteen wire-loop test points have been provided as convenient connection points for digital voltmeters
(DVM) or oscilloscope probes to aid in the evaluation of the IPS device. A via labled PH is available near
U1 to scope on the switching frequency. A description of each test point is listed in Table 3
Table 3. Test Point Descriptions
TEST POINT
VIN
VOUT
Output voltage monitor. Connect DVM to this point for measuring efficiency, line regulation, and
load regulation.
GND
Input and output voltage monitor grounds (located between terminal blocks). Reference the above
DVMs to any of these four ground points.
VIN (scope)
Input voltage scope monitor. Connect an oscilloscope to this set of points to measure input ripple
voltage.
VOUT (scope)
PWRGD
INH/UVLO
Output voltage scope monitor. Connect an oscilloscope to this set of points to measure output
ripple voltage and transient response.
Monitors the power good signal of the IPS device. This is an open drain signal that requires an
external pull-up resistor to VIN if monitoring is desired. A 10-kΩ to 100-kΩ pull-up resistor is
recommended. PWRGD is high if the output voltage is within 92% to 106% of its nominal value.
Connect this point to control ground to inhibit the IPS device. Allow this point to float to enable the
device. Do not use a pull-up resistor. An external resistor can be connected from this point to
control ground to increase the under-voltage lockout (UVLO) of the device.
RT/CLK
Connects to the RT/CLK pin of the IPS device. An external clock signal can be applied to this
point to synchronize the device to an appropriate frequency.
SS/TR
Connects to the internal slow-start capacitor of the IPS device. An external capacitor can be
connected from this point to control ground to increase the slow-start time of the device. This
point can also be used as an input for tracking applications.
GND
5
DESCRIPTION
Input voltage monitor. Connect DVM to this point for measuring efficiency.
Control grounds (located along bottom of EVM). Reference any signals associated with the
control test points to either of these two ground points.
Operation Notes
The UVLO threshold of the factory-stock EVM is approximately 3.05 V with 0.3 V of hysteresis. The input
voltage must be above the UVLO threshold in order to startup the IPS device. The UVLO threshold can be
increased by adding a resistor to the INH/UVLO test point as described above. After startup, the minimum
input voltage to the IPS device must be at least 2.95 V or (VOUT + 1.1 V), whichever is greater, in order to
produce a regulated output. The maximum operating input voltage for the IPS device is 6 V. Refer to the
TPS84410 datasheet for further information on the input voltage range and UVLO operation.
After application of the proper input voltage, the output voltage of the IPS device will ramp to its final value
in approximately 1 ms. If desired, this soft-start time can be increased by adding a capacitor to the SS/TR
test point as described above. Refer to the TPS84410 datasheet for further information on adjusting the
soft-start time.
Table 1 lists the recommended switching frequencies for each of the VOUT selections. These
recommendations cover operation over a wide range of input voltage and output load conditions. Several
factors such as duty cycle, minimum on-time, minimum off-time, and current limit influence selection of the
appropriate switching frequency. In some applications, other switching frequencies might be used for
particular output voltages, depending on the above factors. Refer to the TPS84410 datasheet for further
information on switching frequency selection, including synchronization.
SLUU633A – September 2011 – Revised February 2012
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Copyright © 2011–2012, Texas Instruments Incorporated
5
TPS84x10EVM-00x Schematic
6
www.ti.com
TPS84x10EVM-00x Schematic
Figure 3. TPS84x10EVM-00x Schematic
6
TPS84410EVM-001/TPS84210EVM-002/TPS84610EVM-003, 2-A to 6-A
Integrated Power Solution
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PCB Layouts
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7
PCB Layouts
Figure 4. Top Layer
Figure 5. Internal 1 Layer
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PCB Layouts
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Figure 6. Internal 2 Layer
Figure 7. Bottom Layer
8
TPS84410EVM-001/TPS84210EVM-002/TPS84610EVM-003, 2-A to 6-A
Integrated Power Solution
SLUU633A – September 2011 – Revised February 2012
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PCB Layouts
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Figure 8. Top Assembly
Figure 9. Bottom Layer
SLUU633A – September 2011 – Revised February 2012
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9
List of Material
8
www.ti.com
List of Material
Table 4. TPS84x10EVM-00x List of Material (1) (2) (3) (4) (5)
(1)
(2)
(3)
(4)
(5)
10
-003
-002
-001
REF DES
DESCRIPTION
Part Number
MFR
1
1
1
C1
Capacitor, ceramic, 10 V, x5R, 10%, 47 µF,
1210
GRM32ER61A476K
Murata
1
1
1
C2
Capacitor, ceramic, 6.3 V, x5R, 20%, 47 µF,
1210
GRM32ER60J476M
Murata
1
0
1
1
C7
Capacitor, polymer, 10 V, 20%, 220 µF, D3L
10TPE220ML
Sanyo
0
0
C8
Capacitor, polymer, 10 V, 20%, 220 µF, D3L
10TPE220ML
Sanyo
1
1
1
C4
Capacitor, polymer, 6.3 V, 20%, 100 µF, B2
6TPE100MPB
Sanyo
0
0
0
C3, C5, C6
Capacitor, ceramic, 0.1 µF, 1210
Std
STD
0
0
0
10
Capacitor, ceramic, 0.01 µF, 0402
STD
STD
2
2
2
J1-2
Header, male 2 x 5 pin, 100-mil spacing, 0.100
inch x 5 inch x 2 inch
PEC05DAAN
Sullins
1
1
1
R3
Resistor, chip, 1/16 W, 1%, 2.87 kΩ, 0603
STD
STD
1
1
1
R4
Resistor, chip, 1/16 W, 1%, 1.15 kΩ, 0603
STD
STD
1
1
1
R5
Resistor, chip, 1/16 W, 1%, 681 Ω, 0603
STD
STD
1
1
1
R6
Resistor, chip, 1/16 W, 1%, 464 Ω, 0603
STD
STD
1
1
1
R7
Resistor, chip, 1/16 W, 1%, 348 kΩ, 0603
STD
STD
1
1
1
R8
Resistor, chip, 1/16 W, 1%, 715 kΩ, 0603
STD
STD
1
1
1
R9
Resistor, chip, 1/16 W, 1%, 1.2 MΩ, 0603
STD
STD
1
1
1
R10
Resistor, chip, 1/16 W, 5%, 0 Ω, 0603
STD
STD
1
1
1
R13
Resistor, chip, 1/16 W, 1%, 174 kΩ, 0603
STD
STD
1
1
1
R14
Resistor, chip, 1/16 W, 1%, 113 kΩ, 0603
STD
STD
0
0
0
R1, R2, R11,
R12
Resistor, chip, 1/16 W, 1%, 100 kΩ, 0402
Std
Std
These assemblies are ESD sensitive, ESD precautions shall be observed.
These assemblies must be clean and free from flux and all contaminants. Use of no clean flux is not acceptable.
These assemblies must comply with workmanship standards IPC-A-610 Class 2.
Ref designators marked with an asterisk ('**') cannot be substituted. All other components can be substituted with equivalent
MFG's component.
Install label after final wash. Text shall be 8 pt font. Text shall be per Table 5.
TPS84410EVM-001/TPS84210EVM-002/TPS84610EVM-003, 2-A to 6-A
Integrated Power Solution
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List of Material
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Table 4. TPS84x10EVM-00x List of Material (1) (2) (3) (4) (5) (continued)
-003
-002
-001
REF DES
2
2
2
TB1-2
DESCRIPTION
Part Number
MFR
Terminal block, 2 pin, 15 A, 5.1 mm, 0.40 inch x
0.35 inch
ED120/2DS
OST
8
8
8
TP1, TP2 TP8
TP10- TP14
Test point, white, thru hole, 5012, 0.125 inch x
0.125 inch
5012
Keystone
6
6
6
TP3-7 TP9
Test point, black, thru hole, 5011, 0.125 inch x
0.125 inch
5011
Keystone
0
0
1
U1
6-V input, 4-A Output Sync. Step-Down
Converter with PWM, QFN
TPS84410RKG
TI
0
1
0
U1
6-V input, 2-A Output Sync. Step-Down
Converter with PWM, QFN
TPS84210RKG
TI
1
0
0
U1
6-V input, 6-A Output Sync. Step-Down
Converter with PWM, QFN
TPS84610RKG
TI
1
1
1
PCB, 0.063 inch H x 1.9 inch L x 3.9 inch W
PWR059
ANY
2
2
2
Conn jumper shorting gold flash
SPC02SYAN
Sullins
4
4
4
Bumpon hemisphere 0.44 inch x 0.20 inch clear, SJ-5303
0.440 inch Dia x 0.200 inch H
3M
Table 5. Labeling
ASSEMBLY NUMBER
TExT
PWR059-001
TPS84410EVM-001
PWR059-002
TPS84210EVM-002
PWR059-003
TPS84610EVM-003
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It is important to operate this EVM within the input voltage range of 3 V to 6 V and the output voltage range of 0.8 V to 3.6 V .
Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are
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