Texas Instruments Evaluation Module for TPS54428 TPS54428EVM-052 TPS54428EVM-052 데이터 시트
제품 코드
TPS54428EVM-052
1
0.765
1
2
æ
ö
=
×
+
ç
÷
è
ø
OUT
R
V
V
R
Performance Specification Summary
2
Performance Specification Summary
A summary of the TPS54428 evaluation module performance specifications is provided in
Specifications are given for an input voltage of V
IN
= 12 V and an output voltage of 1.05 V, unless
otherwise noted. The ambient temperature is 25
°
C for all measurement, unless otherwise noted.
Table 2. TPS54428EVM-052 Performance Specifications Summary
Specifications
Test Conditions
Min
Typ
Max
Unit
Input voltage range (V
IN
)
4.5
12
18
V
Output voltage (V
OUT
)
1.05
V
Operating frequency
V
IN
= 12 V, I
OUT
= 2 A
650
kHz
Output current range
0
4
A
Line regulation
I
O
= 2.5 A
+/- 0.33
%
Load regulation
V
IN
= 12 V
+0.9/- 0.1
%
Overcurrent limit
V
IN
= 12 V, L = 1.5
µ
H
4.6
5.3
6.8
A
Output ripple voltage
V
IN
= 12 V, I
OUT
= 4A
15
mV
PP
Maximum efficiency
V
IN
= 5 V, I
OUT
= 0.7 A
88
%
3
Modifications
This evaluation module is designed to provide access to the features of the TPS54428. Some
modifications can be made to this module.
modifications can be made to this module.
3.1
Output Voltage Setpoint
To change the output voltage of the EVM, it is necessary to change the value of resistor R1. Changing the
value of R1 can change the output voltage above 0.765 V. The value of R1 for a specific output voltage
can be calculated using
value of R1 can change the output voltage above 0.765 V. The value of R1 for a specific output voltage
can be calculated using
For output voltages from 0.76 V to 7 V:
(1)
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
C9. C10, C11
Output Voltage
R1
R2
C4
L1
Total
(V)
(k
Ω
)
(k
Ω
)
(pF)
(
µ
H)
Capacitance
(
µ
F)
1
6.81
22.1
1.5
22 - 68
1.05
8.25
22.1
1.5
22 - 68
1.2
12.7
22.1
1.5
22 - 68
1.5
21.5
22.1
1.5
22 - 68
1.8
30.1
22.1
5 - 22
2.2
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
6.5
165
22.1
5 - 22
3.3
22 - 68
3
SLVU578
–
December 2011
TPS54428, 4-A, SWIFT
™
Regulator Evaluation Module
Copyright
©
2011, Texas Instruments Incorporated