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TPS55010

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2.95V To 6V Input, 2W, Isolated DC/DC Converter with Integrated FETS

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Data sheet

TPS55010

ACTIVE
Data sheet Order now

Product details

Topology Boost, PFC controller Control mode current mode control Features Adjustable soft start, Enable, Frequency synchronization, Power good, UVLO adjustable Duty cycle (max) (%) 80
Topology Boost, PFC controller Control mode current mode control Features Adjustable soft start, Enable, Frequency synchronization, Power good, UVLO adjustable Duty cycle (max) (%) 80
WQFN (RTE) 16 9 mm² 3 x 3
  • Isolated Fly-Buck™ Topology
  • Primary Side Feedback
  • 100 kHz to 2000 kHz Switching
    Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start
  • Adjustable Input Voltage UVLO
  • Open Drain Fault Output
  • Cycle-by-Cycle Current Limit
  • Thermal Shutdown Protection
  • 3 mm × 3 mm 16 Pin QFN Package
  • Isolated Fly-Buck™ Topology
  • Primary Side Feedback
  • 100 kHz to 2000 kHz Switching
    Frequency
  • Synchronizes to External Clock
  • Adjustable Slow Start
  • Adjustable Input Voltage UVLO
  • Open Drain Fault Output
  • Cycle-by-Cycle Current Limit
  • Thermal Shutdown Protection
  • 3 mm × 3 mm 16 Pin QFN Package

The TPS55010 is a transformer driver designed to provide isolated power for isolated interfaces, such as RS-485 and RS-232, from 3.3 V or 5 V input supply.

The device uses fixed frequency current mode control and half bridge power stage with primary side feedback to regulate the output voltage for power levels up to 2W. The switching frequency is adjustable from 100 kHz to 2000 kHz so solution size, efficiency and noise can be optimized. The switching frequency is set with a resistor or is synchronized to external clock using the RT/CLK pin. To minimize inrush currents, a small capacitor can be connected to the SS pin. The EN pin can be used as an enable pin or to increase the default input UVLO voltage from 2.6V.

With the same transformer the TPS55010 can provide a solution for different input and output voltage combinations by adjusting the primary side voltage. Off the shelf transformers are available to provide single positive, or dual positive and negative output voltages.

The TPS55010 is available in a 3mm x 3mm 16 pin QFN package with thermal pad.

The TPS55010 is a transformer driver designed to provide isolated power for isolated interfaces, such as RS-485 and RS-232, from 3.3 V or 5 V input supply.

The device uses fixed frequency current mode control and half bridge power stage with primary side feedback to regulate the output voltage for power levels up to 2W. The switching frequency is adjustable from 100 kHz to 2000 kHz so solution size, efficiency and noise can be optimized. The switching frequency is set with a resistor or is synchronized to external clock using the RT/CLK pin. To minimize inrush currents, a small capacitor can be connected to the SS pin. The EN pin can be used as an enable pin or to increase the default input UVLO voltage from 2.6V.

With the same transformer the TPS55010 can provide a solution for different input and output voltage combinations by adjusting the primary side voltage. Off the shelf transformers are available to provide single positive, or dual positive and negative output voltages.

The TPS55010 is available in a 3mm x 3mm 16 pin QFN package with thermal pad.
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Technical documentation

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Top documentation Type Title Format options Date
* Data sheet TPS55010 2.95-V To 6-V Input, 2 W, Isolated DC/DC Converter with Integrated FETs datasheet (Rev. B) PDF | HTML 27 Oct 2014
Product overview Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications (Rev. A) PDF | HTML 20 Aug 2024
Application note Step-Dwn (Buck) Convrtr Pwer Solutions for Programmable Logic Controller Systems (Rev. A) PDF | HTML 26 Jul 2021
Application note Industrial data-acquisition interfaces with digital isolators (Rev. A) 02 Oct 2018
EVM User's guide TPS55010EVM-009, Low-Power, Isolated Fly-Buck(TM) Converter (Rev. B) 30 Jul 2018
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Technical article Simplify your power storage design with these Fly-Buck™ power tips PDF | HTML 13 Sep 2017
Technical article Create a Fly-Buck™ converter in WEBENCH® Power Designer PDF | HTML 09 Oct 2015
Analog Design Journal 3Q 2011 Issue Analog Applications Journal 16 Sep 2011
User guide TPS55010EVM-051, Low-Power, Isolated Fly-buck™, Dual Output Converter 16 Aug 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPS55010EVM-009 — Evaluation Module for 2.95V to 6V Input, 200mA Isolated DC/DC Converter

The TPS55010EVM-009 is a fully assembled and tested circuit for evaluating the TPS55010 Isolated DC/DC Converter with Integrated FETs. The TPS55010EVM-009 uses fixed frequency current mode control and a half bridge power stage with primary side feedback to regulate the output voltage for power (...)
User guide: PDF
Not available on TI.com
Simulation model

TPS55010 TINA-TI Transient Reference Design

SLVM602.TSC (167 KB) - TINA-TI Reference Design
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Simulation model

TPS55010 TINA-TI Transient Spice Model

SLVM601.ZIP (51 KB) - TINA-TI Spice Model
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Simulation model

TPS55010 Unencrypted PSpice Transient Model Package (Rev. A)

SLVM278A.ZIP (44 KB) - PSpice Model
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Calculation tool

FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator

This tool helps a power supply engineer to select the right isolated DC-DC topology based on the specifications. Depending on the topology chosen, the calculator also recommends the right IC for the design.

Supported products & hardware

Supported products & hardware
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Calculation tool

SLVC363 — Fly-Buck Design Calculator Tool, TPS55010

Supported products & hardware

Supported products & hardware
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Design tool

FLYBUCK-DESIGNER — Fly-buck design calculator tool

The Fly-Buck Design Calculator Tool assists designers with routine calculations for the 2W TPS55010 isolated DC/DC Converter. Two versions are available to support a single or a dual output configuration. The tool helps the user select a transformer, the sense resistors, and the power diode as (...)
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Reference designs

TIDA-00300 — Isolated power architecture reference design for communication and analog input/output modules

This reference design provides a means to isolate I2C or SPI communication lines. This is often required in grid infrastructure applications such as protection relays and circuit breakers where high voltages are involved. This reference design provides both power isolation and signal isolation.
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00766 — Differential Pulse Train Output (PTO) Programmable Logic Controller (PLC) Module Reference Design

The differential pulse-train output (PTO) reference design illustrates the design of a differential high-speed digital output module using a RS-485 driver powered from the PLC backplane using isolated fly-buck power converter. The reference design is mainly used in positioning and motion control (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01333 — 8-ch Isolated High Voltage Analog Input Module with ISOW7841 Reference Design

The TIDA-01333 isolated high voltage analog input module reference design has eight channels supporting both, voltage and current measurement. In addition, 4 channels support common-mode voltages up to ±160V. Isolation of +5V line and the Serial Peripheral Interface  (SPI) (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00764 — 8-ch Isolated High Voltage Analog Input Module Reference Design

This reference design is a high-voltage analog input module with eight channels. Each channel can be used for both voltage and current measurement. The design uses 16-bit analog-to-digital converter (ADC) ADS8681 that can handle input voltage of up to ±12.288 V. This make any (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00128 — Low-Power, Low-Noise Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU)

This reference design is intended for use in molded case circuit breakers (MCCB) electronic trip units.  The op amp based design acts as current monitoring for over-current earth fault relays. Utilizing a low cost op amp, this design provides a pick-up (A) accuracy ±10 % and time delay (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00130 — Zero drift PGA based Analog Front End Design for Circuit Breakers (ACB/MCCB-ETU)

This reference design is intended for use in molded case circuit breakers (MCCB) electronic trip units.  The programmable gain amplifier based design acts as the current monitoring for over-current earth fault relays. Utilizing a zero drift programmable amplifier, this design provides a (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00191 — Analog Front End for Motor Electronic Overload Relays with Enhanced Current Range

This reference design is the analog front end (AFE) for an electronic overload relay, used for monitoring and protecting motors from overcurrent or undercurrent events. It is an ideal tool for developers creating overload relays for sensitive AC motors in industrial applications. This programmable (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-00012 — High Efficiency Isolated CAN & Profibus Interface Reference Design

The high-efficiency isolated CAN and Profibus interface reference design is intended for use in industrial systems that require isolated power for CAN and/or Profibus transceivers. This design highlights the ability to completely shut off both the power converter and data transceivers with just one (...)
Test report: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
WQFN (RTE) 16 Ultra Librarian
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  • Ongoing reliability monitoring
Information included:
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