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Introduction
1
Introduction
The TPS212x EVM is an evaluation module for TI's TPS212x family of two-input, one-output power
multiplexers. This device automatically detects, selects, and seamlessly transitions between two power
supplies, each operating from 2.7 V to 22 V. The TPS2121 device, the VSON hot-rod package, can deliver
up to 4 A while the TPS2120, WCSP package, can handle up to 3 A. This user's guide contains the EVM
schematics, board layout, list of materials, and necessary instructions on how to properly operate the
EVM.
The EVM has test points for convenient access to all critical voltages and pins, and jumpers to configure
the different modes of operation. There are also jumpers to configure input and output capacitance, output
load resistance, current limit, and the adjustable soft-start time.
1.1
Features
The TPS212x EVM offers many features including:
•
Uninterrupted system power with seamless switchover
•
Overvoltage protection
•
Low R
resistance at both inputs: 50 mΩ typical
ON
•
Multiple configurations for different modes of operation
1.2
Applications
The TPS212x power multiplexer can be used in many applications, including:
•
Add-on cards (PCIE, RAID, Network)
•
ePos
•
Video surveillance
•
ORing controllers
1.3
Description
The TPS212x EVM power MUX evaluation board enables evaluation of the TPS212x family of Power
MUX devices. Although both variants (TPS2121EVM-042 or TPS2120EVM-023) contain different jumpers
and connectors, they will function almost identically. Both EVMs allow operation at different input voltages,
although the resistors and jumpers are configured for operation at 3.3 V, 5 V, and 12 V. See the TPS212x
data sheet for more information regarding these settings.
The TPS212x EVMs also allow multiple modes of operation. By configuring the jumpers, the EVMs
automatically detect, select, and seamlessly transition between available inputs. The different modes of
operation are explained in
EVM
Modes of Operation:
• VCOMP
• VREF
TPS2121EVM
• XCOMP
• XREF
• VCOMP
TPS2120EVM
• VREF
2
TPS212x Evaluation Module
Table
1.
Table 1. TPS212x EVM Comparison Table
V
Range
OUT
2.7 V–22 V
2.7 V–22 V
Copyright © 2018–2019, Texas Instruments Incorporated
I
MAX
Package
OUT
4 A
VSON, 2.0 mm × 2.5 mm
3 A
WCSP, 1.5 mm × 2.0 mm
SLVUBD2A – September 2018 – Revised January 2019
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