Kit Contents; Specification; Device Information - Texas Instruments TPS546C25EVM-1PH User Manual

Evaluation Module Overview
1 Evaluation Module Overview
1.1 Introduction
The TPS546C25EVM-1PH evaluation module (EVM) is a single phase buck converter with a TPS546C25
device. The TPS546C25 device is a stackable synchronous buck with PMBus
a nominal 2.7V to 18V supply with external bias. The device allows programming and monitoring through the
PMBus interface.
The TPS546C25 device is configured as a single-phase buck converter in factory default.

1.2 Kit Contents

The kit includes the TPS546C25EVM-1PH.

1.3 Specification

Table 1-1 lists the electrical performance specifications in room temperature (20 to 25°C). Characteristics are for
an input voltage of VIN = 12V, unless otherwise specified.
Table 1-1. TPS546C25EVM-1PH Electrical Performance Specifications
Parameter
Input Characteristics
Input voltage range, V
IN
Output Characteristics
Output voltage, V
OUT
Output load current, I
OUT
Output overcurrent fault threshold
Systems Characteristics
Switching frequency
PMBus Interface and Pin-Strapping
U1 PMBus address
U1 Voltage reference
U1 Soft-start time (TON_RISE)

1.4 Device Information

The TPS546C25 device is a highly integrated buck with D-CAP4 control topology for fast transient response.
The PMBus interface configures all programmable parameters and stores them in the non-volatile memory
(NVM ) as the new default values to minimize the external component count. Pinstrap options allow for
configuration as primary or secondary, stack position and stack number, DCM (single phase only) or FCCM,
overcurrent limit, fault response, internal or external feedback resistor, output voltage selection or range,
switching frequency, and compensation.
The PMBus interface with a 1MHz clock support gives a convenient, standardized digital interface for
configuration, as well as telemetry of key parameters including output voltage, output current, and internal
die temperature. Response to fault conditions is set to restart, latch off, or ignore, depending on system
requirements. Two, three, or four TPS546C25 devices can be interconnected to provide up to 140 A on a
single output.
One device option is to overdrive the internal 5V LDO with an external 5V supply through the VDRV and
VCC pins to improve efficiency, reduce power dissipation, and enable start-up with a lower input voltage.
The TPS546C25 is a lead-free device and is Restriction of Hazardous Substances (RoHS) compliant without
exemption.
2 TPS546C25EVM-1PH 4V to 18V, 35A, Buck Converter with PMBus and
Telemetry Evaluation Module
Test Conditions
Current limit setting of U1 programmed by MSEL1 J9 pins
3-4 shorted
Programmed by MSEL2 J8 pins 7-8
Programmed by PMB_ADDR J15 pins 1-2 shorted
Default setting by VSEL J11 pins 7-8 shorted
Default setting of TON_RISE programmed by MSEL1 J9
pins 3-4 shorted
Copyright © 2024 Texas Instruments Incorporated
® interface that can operate from
MIN TYP MAX
10.8 12 13.2
1.2
0 35
100
800
11
1.2
2
SLUUCZ1 – JULY 2024
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