UCC38C42DR

DC DC Switching Controllers Overview

The UCC38C42DR is a BiCMOS low-power current-mode PWM controller manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 36 V and supports switching frequencies up to 500 kHz. The device features a maximum duty cycle of 50% and includes an integrated soft-start circuit. It provides a 1 A peak output drive current and functions across a commercial temperature range of 0°C to +70°C. The component is housed in an 8-pin SOIC package.

DC DC Switching Controllers Feature Summary

• Implements current-mode control architecture for simplified loop compensation and inherent line feedforward capabilities.
• Integrates a precision oscillator with external timing resistor setting to support switching frequencies up to 500 kHz.
• Includes a dedicated soft-start pin that controls the ramp-up of the internal reference voltage to limit inrush current during startup.

DC DC Switching Controllers Applications

• Forward converter power supplies
• Flyback converter designs
• Boost converter topologies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'DR' confirms the SOIC-8 surface-mount package and commercial temperature grade. Confirm RoHS compliance status via the official datasheet, as manufacturing revisions may alter environmental declarations. Ensure the source document matches the exact part number to avoid confusion with non-dr variants or different package styles.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring low quiescent current and simple current-mode control without complex compensation networks. It is suitable for isolated and non-isolated DC-DC converters where moderate efficiency and cost-effectiveness are prioritized over high-frequency operation. Verify that the required maximum duty cycle does not exceed the internal 50% limit.

DC DC Switching Controllers Part Context

This device belongs to the UCCx8C4x series of BiCMOS low-power current-mode PWM controllers from Texas Instruments. It shares functional similarities with the UC3842 family but offers optimized performance characteristics for modern low-power applications. The series is designed to provide robust protection features and stable operation in various switching regulator configurations.

DC DC Switching Controllers Replacement Considerations

The UC3842N is a documented alternative within the same product family offering similar current-mode control functionality. Verify pin compatibility and electrical parameter alignment before substitution. Other members of the UCCx8C4x series may serve as replacements depending on specific package or temperature requirements.