LM5045

ACTIVE

Full-bridge PWM controller with Integrated MOSFET Drivers

Product details

Vin (max) (V) 14 Operating temperature range (°C) -40 to 125 Control mode Current Topology Full bridge, Half bridge, Push pull Rating Catalog Features Current limiting, High-voltage startup, Integrated gate drivers, Multi-topology, SR logic, Synchronization pin Duty cycle (max) (%) 50
Vin (max) (V) 14 Operating temperature range (°C) -40 to 125 Control mode Current Topology Full bridge, Half bridge, Push pull Rating Catalog Features Current limiting, High-voltage startup, Integrated gate drivers, Multi-topology, SR logic, Synchronization pin Duty cycle (max) (%) 50
HTSSOP (PWP) 28 62.08 mm² 9.7 x 6.4 WQFN (RSG) 28 25 mm² 5 x 5
  • Highest Integration Controller for Small Form
    Factor, High-Density Power Converters
  • High-Voltage Start-Up Regulator
  • Intelligent Sync Rectifier Start-Up Allows Linear
    Turnon Into Prebiased Loads
  • Synchronous Rectifiers Disabled in UVLO mode and
    Hiccup Mode
  • Two Independent, Programmable Synchronous Rectifier
    Dead-Time Adjustments
  • Four High-Current 2-A Bridge Gate Drivers
  • Wide-Bandwidth Optocoupler Interface
  • Configurable for Either Current Mode or Voltage
    Mode Control
  • Dual-Mode Overcurrent Protection
  • Resistor Programmed 2-MHz Oscillator
  • Programmable Line UVLO and OVP
  • Highest Integration Controller for Small Form
    Factor, High-Density Power Converters
  • High-Voltage Start-Up Regulator
  • Intelligent Sync Rectifier Start-Up Allows Linear
    Turnon Into Prebiased Loads
  • Synchronous Rectifiers Disabled in UVLO mode and
    Hiccup Mode
  • Two Independent, Programmable Synchronous Rectifier
    Dead-Time Adjustments
  • Four High-Current 2-A Bridge Gate Drivers
  • Wide-Bandwidth Optocoupler Interface
  • Configurable for Either Current Mode or Voltage
    Mode Control
  • Dual-Mode Overcurrent Protection
  • Resistor Programmed 2-MHz Oscillator
  • Programmable Line UVLO and OVP

The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.

The LM5045 PWM controller contains all of the features necessary to implement full-bridge topology power converters using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high-side and low-side gate drivers for the four external bridge MOSFETs plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the leading and trailing edge dead-time between the main and synchronous rectifier control signals. Intelligent start-up of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.

Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 5
Type Title Date
* Data sheet LM5045 Full-Bridge PWM Controller With Integrated MOSFET Drivers datasheet (Rev. H) PDF | HTML 28 Jan 2015
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
User guide AN-2111 LM5045 Evaluation Board (Rev. C) 06 May 2013
Application note AN-2213 LM5045 Based 240W Power Converter Using Full-Wave (Rev. A) 06 May 2013
Application note Applying I2C-Compatible Temperature Sensors in Systems With Slow Clock Edges (Rev. A) 06 May 2013

Design & development

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

Evaluation board

LM5045EVAL — Evaluation Board for the LM5045

The LM5045 evaluation board is designed to provide the design engineer with a fully functional power converter based on the full-bridge topology to evaluate the LM5045 PWM controller. The evaluation board is provided in an industry standard quarter brick footprint.
Not available on TI.com
Simulation model

LM5045 PSPICE Model

SNVM006.ZIP (350 KB) - PSpice Model
Calculation tool

SLUC501 LM5045 Design Calculator

Supported products & hardware

Supported products & hardware

Products
AC/DC & DC/DC controllers (external FET)
LM5045 Full-bridge PWM controller with Integrated MOSFET Drivers
Reference designs

PMP31092 — Low-profile 140-W full-bridge reference design

This power supply is a 140-W full-bridge reference design for applications requiring high density and low component heights due to the planar transformer. The design is based on a hard-switched full bridge topology using Schottky diodes on the secondary side and driven by LM5045. A planar (...)
Test report: PDF
Package Pins CAD symbols, footprints & 3D models
HTSSOP (PWP) 28 Ultra Librarian
WQFN (RSG) 28 Ultra Librarian

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by 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, see TI support. ​​​​​​​​​​​​​​

Videos