650W Power Stage Without Heat Sink Reference Design for Low-Frequency Offline UPS and Inverters
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.

Description & Features

Technical documentation

Support & Training

Order Now

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Key Document


This reference design is a 650-W inverter power stage designed for low-frequency (transformer-based), single-phase UPS operating from a 12-V battery. The design enables low form factor and high-efficiency implementation, taking advantage of the TI SMD MOSFET in a SON5x6 package with very low RDS(on) and low gate charge (Qg). Using two devices in parallel for each leg of the full-bridge power stage, the power stage eliminates the need of a heat sink, which reduces overall system cost.

  • Designed for standby or offline UPS from 100 VA to 850 VA; can be extended up to 1.5 kVA with additional FETs in parallel
  • Solution with SMD MOSFETs enhances manufacturability and assembly of UPS
  • No heat sink for power dissipation reduces system cost and production time
  • Tested and validated for 100-W to 650-W operation with bulb loads
  • Typical efficiency of ≈95%, maximum efficiency of >98.5%
  • Protections for overcurrent, short circuit, overvoltage, and undervoltage

See the Important Notice and Disclaimer covering reference designs and other TI resources.


Schematic/Block Diagram

Quickly understand overall system functionality.

Download Schematic

Design Guide

Get results faster with test and simulation data that's been verified.

Download Design Guide

Design Files

Download ready-to-use system files to speed your design process. Get Viewer.

Download Design Files

TI Devices (6)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17573Q5B  30V, N ch NexFET MOSFETâ„¢, single SON5x6, 1.45mOhm  MOSFETs  Sample & Buy Not Available
INA181  26V, bi-directional, 350kHz current sense amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM5101B  2-A, 100-V half bridge gate driver with 8-V UVLO and TTL inputs  Gate drivers  Sample & Buy Not Available
LMT88  ±4°C analog output temperature sensor, with -11.77mV/°C gain  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
LMV431B  0.5%, low-voltage (1.24-V) adjustable precision shunt regulator  Voltage references  Sample & Buy Not Available
TLV704  150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
CSD17573Q5B VSON-CLIP (DNK)| 8 Download
INA181 Download Download
LM5101B Download Download
Download Download
LMT88 Download Download
LMV431B Download
TLV704 Download Download

Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

Step 1: Download and install the free download.

Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

Technical documentation

See the Important Notice and Disclaimer covering reference designs and other TI resources.

Datasheet (1)
Title Type Size (KB) Date
PDF 525 06 Apr 2017
User guides (1)
Title Type Size (KB) Date
PDF 3205 25 Jun 2019
Design files (6)
Title Type Size (KB) Date
ZIP 453 22 Sep 2017
ZIP 2509 22 Sep 2017
PDF 2041 22 Sep 2017
PDF 238 22 Sep 2017
PDF 103 22 Sep 2017
PDF 439 22 Sep 2017

Support & training

Search our extensive online knowledge base where millions of technical questions and answers are available 24/7.

Search answers from TI experts

Content is provided 'AS IS' by the respective TI and Community contributors and does not constitute TI specifications.
See terms of use.

If you have questions about quality, packaging, or ordering TI products visit our Support page.

Technical articles