Texas Instruments TPS54339E Evaluation Module TPS54339EEVM-056 TPS54339EEVM-056 Datenbogen
Produktcode
TPS54339EEVM-056
Test Setup and Results
lists the R1 values for some common output voltages. For higher output voltages of 1.8 V or
above, a feedforward capacitor (C4) may be required to improve phase margin. Pads for this component
(C4) are provided on the printed-circuit board. Note that the resistor values given in
(C4) are provided on the printed-circuit board. Note that the resistor values given in
are standard
values and not the exact value calculated using
.
Table 3. Output Voltages
Output Voltage
R1
R2
C4
L1
C9, C10,
(V)
(k
Ω
)
(k
Ω
)
(pF)
(µH)
C11Total
Capacitance
(µF)
1.0
6.81
22.1
2.2
20 - 68
1.05
8.25
22.1
2.2
20 - 68
1.2
12.7
22.1
2.2
20 - 68
1.5
21.5
22.1
2.2
20 - 68
1.8
30.1
22.1
5 - 22
3.3
20 - 68
2.5
49.9
22.1
5 - 22
3.3
20 - 68
3.3
73.2
22.1
5 - 22
3.3
20 - 68
5.0
124
22.1
5 - 22
4.7
20 - 68
6.5
165
22.1
5 - 22
4.7
20 - 68
3.2
Output Filter and Closed-Loop Response
The TPS54339E relies on the output filter characteristics to ensure stability of the control loop. The
recommended output filter components for common output voltages are given in
recommended output filter components for common output voltages are given in
. It may be
possible for other output filter component values to provide acceptable closed-loop characteristics. R3 and
TP4 are provided for convenience in breaking the control loop and measuring the closed-loop response.
TP4 are provided for convenience in breaking the control loop and measuring the closed-loop response.
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Test Setup and Results
This section describes how to properly connect, set up, and use the TPS54339EEVM-056. The section
also includes test results typical for the evaluation modules and efficiency, output load regulation, output
line regulation, load transient response, output voltage ripple, input voltage ripple, start-up, and switching
frequency.
also includes test results typical for the evaluation modules and efficiency, output load regulation, output
line regulation, load transient response, output voltage ripple, input voltage ripple, start-up, and switching
frequency.
4.1
Input/Output Connections
The TPS54339EEVM-056 is provided with input/output connectors and test points as shown in
. A
power supply capable of supplying 2 A must be connected to J1 through a pair of 20 AWG wires. The load
must be connected to J2 through a pair of 20 AWG wires. The maximum load current capability is 2 A.
Wire lengths must be minimized to reduce losses in the wires. Test point TP1 provides a place to monitor
the V
must be connected to J2 through a pair of 20 AWG wires. The maximum load current capability is 2 A.
Wire lengths must be minimized to reduce losses in the wires. Test point TP1 provides a place to monitor
the V
IN
input voltages with TP2 providing a convenient ground reference. TP8 is used to monitor the output
voltage with TP9 as the ground reference.
Table 4. Connection and Test Points
Reference Designator
Function
J1
V
IN
(see
for V
IN
range)
J2
V
OUT
, 1.05 V at 3-A maximum.
JP1
EN control. Connect EN to OFF to disable, connect EN to ON to enable.
TP1
V
IN
test point at V
IN
connector.
TP2
GND test point at V
IN
connector.
TP3
EN test point.
TP4
Loop response measurement test point.
TP5
VREG5 test point.
TP6
Switch node test point.
TP7
Analog ground test point.
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TPS54339EEVM-056, 3-A, Regulator with Eco-Mode™ Evaluation Module
SLVU814 – November 2012
Copyright © 2012, Texas Instruments Incorporated