Texas Instruments 6-17Vin, 5A Synchronous Buck Converter Module TPS54550EVM-158 TPS54550EVM-158 데이터 시트
제품 코드
TPS54550EVM-158
www.ti.com
1.2
Performance Specification Summary
1.3
Modifications
R2
10 k
0.891 V
V
O
0.891 V
(1)
Introduction
low drain-to-source on resistance of the MOSFET allows the TPS54550 to achieve high efficiencies and
helps to keep the junction temperature low at high output currents. An external divider allows for an
adjustable output voltage. External compensation components accommodate a wide range of output filter
components. Additionally, the TPS54550 provides an enable input. The absolute maximum input voltage
is 20 V.
helps to keep the junction temperature low at high output currents. An external divider allows for an
adjustable output voltage. External compensation components accommodate a wide range of output filter
components. Additionally, the TPS54550 provides an enable input. The absolute maximum input voltage
is 20 V.
Table 1. Input Voltage and Output Current Summary
EVM
INPUT VOLTAGE RANGE
OUTPUT CURRENT RANGE
TPS54550EVM-158
VIN = 6 V to 17 V
0 A to 5 A
A summary of the TPS54550EVM-158 performance specifications is provided in
. Specifications
are given for an input voltage of VIN = 12 V and an output voltage of 3.3 V, unless otherwise specified.
The TPS54550EVM-158 is designed and tested for VIN = 6 V to 17 V. The ambient temperature is 25°C
for all measurements, unless otherwise noted. Maximum input voltage for the TPS54550EVM-158 is 20 V.
The TPS54550EVM-158 is designed and tested for VIN = 6 V to 17 V. The ambient temperature is 25°C
for all measurements, unless otherwise noted. Maximum input voltage for the TPS54550EVM-158 is 20 V.
Table 2. TPS54550EVM-158 Performance Specification Summary
SPECIFICATION
TEST CONDITIONS
MIN
TYP
MAX
UNIT
VIN voltage range
6
12 or 15
17
V
Output voltage set point
3.3
V
Output current range
V
IN
= 10 V to 17 V
0
5
A
Line regulation
I
O
= 0 2.5 A, VIN = 10 V - 17 V
+0.08
%
-0.03
Load regulation
VIN = 12 V, I
O
= 0 A to 5 A
+0.07
%
-0.01
Load transient response
Voltage change
I
O
= 1.25 A to 3.75 A
-72.5
mV
Recovery time
450
µ
s
Voltage change
I
O
= 3.75 A to 1.25 A
+72.5
mV
Recovery time
450
µ
s
Loop bandwidth
VIN = 12 V, I
O
= 2.5 A
27
kHz
Phase margin
VIN = 12 V, I
O
= 2.5 A
62
°
Input ripple voltage
VIN = 7 V, I
O
= 5 A
276
300
mVpp
Output ripple voltage
VIN = 7 V, I
O
= 5 A
7
mVpp
Output rise time
5
ms
Operating frequency
700
kHz
Max efficiency
VIN = 6 V, V
O
= 3.3 V, I
O
= 1.25 A
93.5%
The TPS54550EVM-158 is designed to demonstrate the small size that can be attained when designing
with the TPS54550. A few changes can be made to this module.
with the TPS54550. A few changes can be made to this module.
1.3.1
Output Voltage Set Point
To change the output voltage of the EVM, it is necessary to change the value of resistor R2. Changing the
value of R2 can change the output voltage above 0.891 V. The value of R2 for a specific output voltage
can be calculated using
value of R2 can change the output voltage above 0.891 V. The value of R2 for a specific output voltage
can be calculated using
lists the R2 values for some common output voltages. Note that VIN must be in a range so that
the minimum on-time is greater than 220 ns, and the maximum duty cycle is less than 80%. The values
given in
given in
are standard values, not the exact value calculated using
TPS54550EVM-158 SWIFT™ Regulator Evaluation Module
2
SLVU151 – March 2006