LM5045SQ/NOPB

AC DC Converters, Offline Switchers Overview

The LM5045SQ/NOPB is a switching controller from Texas Instruments designed for full-bridge, half-bridge, and push-pull topologies. It operates within a supply voltage range of 14 V to 100 V and supports switching frequencies between 100 kHz and 2 MHz. The device features a maximum duty cycle of 50 percent and provides an output current capability of 2 A. It functions with an output voltage range of 400 mV to 1.25 V. The component is rated for operation between -40 °C and +125 °C and is housed in a WQFN-28 package.

AC DC Converters, Offline Switchers Feature Summary

• Supports full-bridge, half-bridge, and push-pull converter topologies
• Integrates high-side and low-side gate drivers with 2 A output current capability
• Features adjustable switching frequency ranging from 100 kHz to 2 MHz
• Includes integrated UVLO and thermal shutdown protection

AC DC Converters, Offline Switchers Applications

• Point-of-load converters
• Server and workstation power supplies
• Industrial power systems
• Telecommunications equipment

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'SQ' indicates the commercial temperature grade and WQFN-28 package variant. Confirm 'NOPB' denotes lead-free and RoHS compliance. Ensure the ordering part number matches the required pinout and thermal pad configuration for your PCB layout. Cross-reference the manufacturer datasheet for any recent product change notices affecting this specific revision.

AC DC Converters, Offline Switchers Selection Notes

Select this controller when designing isolated or non-isolated converters requiring flexible topology support including full-bridge configurations. Consider its wide input voltage range suitable for bus voltages up to 100 V. Evaluate the need for external components based on the desired switching frequency and duty cycle requirements. Verify that the WQFN-28 package fits your spatial constraints and thermal management strategy.

AC DC Converters, Offline Switchers Part Context

This component belongs to the LM5045 family of PWM controllers from Texas Instruments. It is part of the broader PMIC portfolio focused on power management solutions. The device complements other bridge controllers like the LM5046 by offering versatility across multiple converter architectures within a compact footprint.

AC DC Converters, Offline Switchers Replacement Considerations

LM5045MHX/NOPB offers identical electrical specifications but utilizes an HTSSOP-28 package instead of WQFN-28.