Texas Instruments 6-17Vin, 5A Synchronous Buck Converter Module TPS54550EVM-158 TPS54550EVM-158 Fiche De Données
Codes de produits
TPS54550EVM-158
www.ti.com
2
Test Setup and Results
2.1
Input / Output Connections
2.2
Efficiency
Test Setup and Results
Table 3. Output Voltages Available
Output Voltage (V)
R
2
Value (k
Ω
)
1.8
9.76
2.5
5.49
3.3
3.74
5
2.15
1.3.2
Input Voltage Range
The EVM is designed to operate from a nominal 12 V or 15 V with a working operating range of 6-V to
17-V input voltage. The TPS54550 is specified to operate over an input voltage range of 4.5 V to 20 V.
The upper voltage limit of 17 V is due to minimum on time restrictions to guarantee 3.3-V output.
17-V input voltage. The TPS54550 is specified to operate over an input voltage range of 4.5 V to 20 V.
The upper voltage limit of 17 V is due to minimum on time restrictions to guarantee 3.3-V output.
This section describes how to properly connect, set up, and use the TPS54550EVM-158 evaluation
module. The section also includes test results typical for the TPS54550EVM-158 and covers efficiency,
output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up.
module. The section also includes test results typical for the TPS54550EVM-158 and covers efficiency,
output voltage regulation, load transients, loop response, output ripple, input ripple, and start-up.
The TPS54550EVM-158 is provided with input/output connectors and test points as shown in
. A
power supply capable of supplying 3 A should be connected to J1 through a pair of 20 AWG wires. The
load should be connected to J3 through a pair of 20 AWG wires. The maximum load current capability
should be 5 A. Wire lengths should be minimized to reduce losses in the wires. Test-point TP1 provides a
place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP3 is used to
monitor the output voltage with TP4 as the ground reference.
load should be connected to J3 through a pair of 20 AWG wires. The maximum load current capability
should be 5 A. Wire lengths should be minimized to reduce losses in the wires. Test-point TP1 provides a
place to monitor the VIN input voltages with TP2 providing a convenient ground reference. TP3 is used to
monitor the output voltage with TP4 as the ground reference.
Table 4. EVM Connectors and Test Points
Reference Designator
Function
J1
VIN, 12 V nominal, 6 V to 17 V
J2
OUT, 5 V at 5 A maximum
J3
2-pin header for bi-directional synchronization signal.
J4
2-pin header for enable. Connect EN to ground to disable, open to enable.
TP1
VIN test point at VIN connector
TP2
GND test point at VIN
TP3
Output voltage test point at OUT connector
TP4
GND test point at OUT connector
TP5
Test point between voltage divider network and R3. Used for loop response measurements.
TP6
Test point on power-good pullup resistor. Tie to 3.3 V or 5 V if power-good signal is used.
TP7
Test point for power good.
TP8
Test point for external UVLO.
TP9
Test point for timing resistor.
The TPS54550EVM-158 efficiency peaks at load current of about 1 A to 3 A, depending on input voltage,
and then decreases as the load current increases towards full load.
and then decreases as the load current increases towards full load.
shows the efficiency for the
TPS54550EVM-158 at an ambient temperature of 25°C. The efficiency is lower at higher ambient
temperatures, due to temperature variation in the drain-to-source resistance of the MOSFETs.
temperatures, due to temperature variation in the drain-to-source resistance of the MOSFETs.
SLVU151 – March 2006
TPS54550EVM-158 SWIFT™ Regulator Evaluation Module
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