Texas Instruments TPS51113, Руководство пользователя

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1 Introduction
The TPS51113-EVM evaluation module (EVM), is a high efficiency single phase synchronous buck converter
providing a fixed 1.2-V output at up to 25 A from a 12-V input bus. The EVM uses the TPS51113 synchronous
buck controller.
2 Description
The TPS51113-EVM is designed to use a regulated 12-V (8 V to 14 V) bus to produce a high current, regulated
1.2-V output at up to 25 A of the load current. The TPS51113-EVM is designed to demonstrate the TPS51113
in a typical low-voltage application while providing a number of test points to evaluate the performance of the
TPS51113.
3 Typical Applications
• High current system converters for server and desktop power
• Point of load non-isolated DC-DC converters for telecom and datacom application
4 Features
The TPS51113-EVM features include:
• 25-A DC steady state current
• Start-up into the pre-biased output
• 300-kHz switching frequency
• JP1 for enable function
• Convenient test points for probing critical waveforms and loop response testing
• Four-layer PCB with 2-oz. copper
• All components on the top layer
5 Electrical Performance Specifications
Table 5-1 gives the EVM performance specifications.
Table 5-1. Performance Specification Summary
SPECIFICATION TEST CONDITIONS MIN TYP MAX UNITS
INPUT CHARACTERISTICS
V
IN
Input voltage range 8 12 14 V
I
IN(max)
Maximum input current V
IN
= 8 V, I
O
= 25 A 4.3 A
I
IN
No load input current V
IN
= 14 V, I
O
= 0 A 100 mA
OUTPUT CHARACTERISTICS
V
OUT
Output voltage 1.2 V
V
REG
Output voltage regulation
Line regulation 0.1%
Load regulation 0.3%
V
RIPPLE
Output voltage ripple V
IN
= 12 V, I
O
= 25 A 40 mVpp
Ouptut load current 0 25 A
Output overcurrent threshold 33 A
SYSTEMS CHARACTERISTICS
f
SW
Switching frequency 300 kHz
η Peak efficiency V
IN
= 12 V, V
OUT
= 1.2 V, I
O
= 18 A 89.19%
η Full load efficiency V
IN
= 12 V, V
OUT
= 1.2 V, I
O
= 25 A 88.57%
T
A
Operating ambient temperature 25 °C
Introduction www.ti.com
2 TPS51113 Buck Controller Evaluation Module User's Guide SLUU359A – APRIL 2009 – REVISED FEBRUARY 2022
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