LM5033SD/NOPB

DC DC Switching Controllers Overview

The LM5033SD/NOPB is a high-voltage switching controller designed for push-pull, half-bridge, and full-bridge topologies. It operates within a supply voltage range of 15 V to 90 V and supports switching frequencies of 200 kHz and 600 kHz. The device features two AC gate driver outputs with a peak current of 1.5 A and a maximum duty cycle of 50%. It includes an internal 100-V startup regulator, precision voltage reference, and thermal shutdown. Operating temperatures range from -40°C to +125°C in a WSON-10 package.

DC DC Switching Controllers Feature Summary

• Supports multiple transformer-based topologies including push-pull, half-bridge, and full-bridge configurations.
• Integrates a high-voltage startup regulator enabling operation across a wide input voltage range without external bias supplies.
• Provides synchronized clock capability and direct optocoupler interface for closed-loop voltage mode control applications.

DC DC Switching Controllers Applications

• Closed-loop voltage mode converters requiring highly regulated output voltages
• Open-loop DC transformers such as intermediate bus converters (IBC)
• High-efficiency power stages exceeding 95% efficiency requirements

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'SD' corresponds to the WSON-10 package variant when sourcing. Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the ordering part number matches the exact pinout and thermal pad configuration required by the design. Cross-reference the datasheet revision date to validate feature availability.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring integrated high-voltage startup capabilities in multi-topology applications. The device suits systems needing precise dead-time control and synchronization. Evaluate the 1.5 A gate drive strength against transformer requirements. Consider the WSON-10 footprint constraints during PCB layout planning.

DC DC Switching Controllers Part Context

This part belongs to the LM5033 series of high-voltage PWM controllers manufactured by Texas Instruments. The series provides comprehensive functionality for isolated power conversion stages. The SD suffix specifically denotes the WSON-10 package option, distinguishing it from MSOP variants like the MM suffix.

DC DC Switching Controllers Replacement Considerations

The LM5033MM/NOPB serves as a functional substitute offering identical electrical characteristics but utilizes a 10-TFSOP/MSOP package instead of the WSON-10 form factor. Verify mechanical fitment before substitution.

DC DC Switching Controllers FAQ

What is the maximum operating frequency supported by the LM5033SD/NOPB?

The device supports switching frequencies of 200 kHz and 600 kHz, set by a single external resistor.

Does the LM5033SD/NOPB support external clock synchronization?

Yes, the controller includes a synchronization pin allowing the internal oscillator to be locked to an external clock source.