Texas Instruments Evaluation Module for TPS54527 TPS54527EVM-052 TPS54527EVM-052 Hoja De Datos
Los códigos de productos
TPS54527EVM-052
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)
(
µ
H)
C11Total
Capacitance
(
µ
F)
1
6.81
22.1
1 - 1.5
22 - 68
1.05
8.25
22.1
1 - 1.5
22 - 68
1.2
12.7
22.1
1 - 1.5
22 - 68
1.5
21.5
22.1
1.5
22 - 68
1.8
30.1
22.1
5 - 22
1.5
22 - 68
2.5
49.9
22.1
5 - 22
2.2
22 - 68
3.3
73.2
22.1
5 - 22
2.2
22 - 68
5
124
22.1
5 - 22
3.3
22 - 68
3.2
Output Filter and Closed-Loop Response
The TPS54527 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.
4
Test Setup and Results
This section describes how to properly connect, set up, and use the TPS54527EVM-052. It also includes
test results typical for the evaluation module and efficiency, output load regulation, output line regulation,
load transient response, output voltage ripple, input voltage ripple, start-up, and switching frequency.
test results typical for the evaluation module 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
shows the input/output connectors and test points of TPS54527EVM-052. Connect a power
supply capable of supplying 2 A to J1 through a pair of 20 AWG wires. Connect the load to J2 through a
pair of 20 AWG wires. The maximum load current capability is 5 A. Minimize wire lengths to reduce losses
in the wires. Test point TP1 provides a place to monitor the V
pair of 20 AWG wires. The maximum load current capability is 5 A. Minimize wire lengths 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. Use TP8 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 5 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
TP3
EN test point.
TP4
Loop response measurement test point
TP5
VREG5 test point
TP6
Switch node test point
TP7
Analog ground test point
TP8
Output voltage test point
TP9
Ground test point at output connector
4
TPS54527EVM-052, 5-A, SWIFT
™
Regulator
—
Evaluation Module
SLVU481
–
July 2011
Copyright
©
2011, Texas Instruments Incorporated