650W Power Stage Without Heat Sink Reference Design for Low-Frequency Offline UPS and Inverters

(ACTIVE) TIDA-01292

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Key Document

Description

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.

Features
  • 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

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TI Devices (6)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
CSD17573Q5B  CSD17573Q5B 30 V, N-Channel NexFET Power MOSFET   MOSFETs  Sample & Buy Not Available
INA181  26V, Bi-Directional, Low-/High-Side, Voltage Output Current Sense Amplifier  Current sense amplifiers  Sample & Buy View Design Kits & Evaluation Modules
LM5101B  2A High Voltage High-Side and Low-Side Gate Driver  Gate Drivers  Sample & Buy Not Available
LMT88  2.4V-Capable, 10 uA Analog Output Temperature Sensor  Temperature sensors  Sample & Buy View Design Kits & Evaluation Modules
LMV431B  Low-Voltage (1.24V) Adjustable Precision Shunt Regulators  Voltage references  Sample & Buy Not Available
TLV704  24V Input Voltage, 150mA, Ultra-Low-Iq Low-Dropout (LDO) Regulators  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA181 Download
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LM5101B Download Download
Download Download
LMT88 Download Download
LMV431B Download
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TLV704 Download Download

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Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Datasheet (1)
Title Abstract Type Size (KB) Date Views
PDF 495 06 Apr 2017
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 3207 19 Feb 2018 59
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 453 22 Sep 2017 17
ZIP 2509 22 Sep 2017 24
PDF 2041 22 Sep 2017 19
PDF 238 22 Sep 2017 15
PDF 103 22 Sep 2017 25
PDF 439 22 Sep 2017 69

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