TPS544B20EVM-634: 1V @ 20A, 8 ~ 14V in, Buck

Summary

The PWR-634EVM evaluation module uses either the TPS544C20 or TPS544B20 devices. The TPS544C20 and TPS544B20 are highly integrated synchronous buck converters that are designed for up to 30-A or 20-A current output, respectively.

The PWR-634EVM is designed as a single output DC-DC converter that demonstrates either the TPS544C20 or the TPS544B20 in a typical low-voltage application while providing a number of test points to evaluate the performance. It uses a nominal 12-V input bus to produce a regulated 1.0-V output at up to either 30-A or 20-A of load current, depending on the device installed.

The Fusion Digital Power Designer is the graphical user interface (GUI) used to configure and monitor the Texas Instruments TPS544B20 or TPS544C20 power converter installed on this evaluation module. The application uses the PMBus protocol to communicate with the controller over serial bus by way of a TI USB adapter (see Figure 3).

Specifications

Manufacturer	Texas Instruments
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	296-37917-ND
Eval Board Supplier	Texas Instruments
Eval Board	Normally In Stock
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1 V
Current Out	20 A
Voltage In	8 ~ 14 V
Efficiency @ Conditions	>83%, 14V in, 1V @ 7 ~ 23.5 A >83%, 12V in, 1V @ 6 ~ 23.5 A >82%, 8V in, 1V @ 5 ~ 23.5 A
Voltage Out Range	0.6 ~ 5.5 V
Features	Current Limit (Adj. or Fixed) Over Current Protection PMBus Interface Power Good Output Pre-Biased Startup Remote Sensing Soft Start Thermal Protection Under Voltage Protection, Brown-Out Voltage Reference
Switching Frequency	500 kHz
Standby Current [Typical]	- Not Given
Quiescent Current [Typical]	- Not Given
Component Count + Extras	39 + 18
Internal Switch	Yes
Design Author	Texas Instruments
Application / Target Market	Memory Back-up Networking Servers
Standby Current [Maximum]	- Not Given
Quiescent Current [Maximum]	- Not Given
Main I.C. Base Part	TPS544B20
Date Created By Author	2014-05
Date Added To Library	2015-07