Texas Instruments TPS55340EVM-017, Руководство пользователя, Страница: 2 / 22

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2 SLVU668B – April 2012 – Revised July 2019
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TPS55340EVM-017, 5-V to 12-V Input, 24-V Output Boost Evaluation Module
1 Background
The TPS55340 DC/DC converter is a step-up boost converter. Rated input voltage and output current
range for the evaluation module are given in
Table 1 . This EVM demonstrates the performance of the
TPS55340 in an example application and accommodates evaluation of other boost applications supported
by the TPS55340. This design shows that a small printed-circuit-board area is possible when designing
with the TPS55340 regulator. However, appropriate sizing of the inductor and diode for the desired
application can further reduce the board area. The switching frequency is externally set at a nominal 600
kHz. The 40-V, 5-A, low-side MOSFET is incorporated inside the TPS55340 package along with the gate-
drive circuitry. The low drain-to-source on-resistance of the MOSFET achieves high efficiencies with the
TPS55340. The compensation components are external to the integrated circuit (IC). The absolute
maximum input voltage is 32 V for the EVM.
Table 1. Input Voltage and Output Current Summary
EVM Input Voltage Range Maximum Output Current
TPS55340EVM-017 V
IN
= 5 V to 12 V I
OUT
max = 800 mA (V
IN
= 5 V) to 1.9 A (V
IN
= 12 V)
2 Performance Specification Summary
Table 2 provides a summary of the EVM performance specifications. Specifications are given for an input
voltage of V
IN
= 5 V and V
IN
= 12 V with an output voltage of 24 V, unless otherwise specified. The
ambient temperature is 25°C for all measurements, unless otherwise noted.
Table 2. Performance Specification Summary
Specification Test Conditions Min Typ Max Unit
V
IN
voltage range 5 12 V
Output voltage set point 24 V
Line regulation I
OUT
= 800 mA, V
IN
= 5 V to 12 V ±1%
Operating frequency 600 kHz
Specifications for V
IN
= 5.0 V
Output current range 1 800 mA
Load regulation I
OUT
= 1 mA to 800 mA ±1%
Load transient response
I
OUT
= 200 mA to 600 mA
Voltage change –720 mV
Recovery time 1 ms
I
OUT
= 600 mA to 200 mA
Voltage change 720 mV
Recovery time 1 ms
Loop bandwidth I
OUT
= 800 mA 5.3 kHz
Phase margin I
OUT
= 800 mA 66.5 °
Output ripple voltage I
OUT
= 800 mA 150 mVpp
Maximum efficiency TPS55340EVM-017, V
IN
= 5 V, I
OUT
= 300 mA 92.1%
Specifications for V
IN
= 12 V
Output current range 0.001 1.9 A
Load regulation I
OUT
= 1 mA to 1.9 A ±1%
Load transient response
I
O
= 475 mA to 1.425 A
Voltage change –720 mV
Recovery time 1 ms
I
OUT
= 1.425 A to 475 mA
Voltage change 720 mV
Recovery time 1 ms
Loop bandwidth I
OUT
= 1.9 A 15.6 kHz
Phase margin I
OUT
= 1.9 A 59.6 °
Output ripple voltage I
OUT
= 1.9 A 200 mVpp
Maximum efficiency TPS55340EVM-017, I
OUT
= 800 mA 95.9%