UC3842BVD1

DC DC Switching Controllers Overview

The UC3842BVD1 is a high-performance fixed-frequency current mode controller from onsemi, designed for offline and DC-DC converter applications. It operates in an SOIC-8 surface-mount package. The device features a trimmed oscillator with frequency guaranteed at 250 kHz and supports current mode operation up to 500 kHz. It provides a maximum duty cycle of 96% and delivers a peak output current of 1 A. The operating temperature range spans from -40°C to +105°C.

DC DC Switching Controllers Feature Summary

• High current totem pole output stage optimized for driving power MOSFETs
• Latching PWM architecture enabling cycle-by-cycle current limiting protection
• Integrated undervoltage lockout mechanism with hysteresis for stable startup
• Automatic feed forward compensation for improved line regulation

DC DC Switching Controllers Applications

• Offline flyback converters
• Forward converters
• Boost DC-DC converters

DC DC Switching Controllers Procurement Notes

Verify the complete part number including suffixes such as R2G when sourcing, as these indicate specific tape-and-reel packaging configurations. Confirm RoHS compliance status and halide-free designation through official manufacturer documentation or authorized distributor datasheets prior to procurement to ensure adherence to environmental standards.

DC DC Switching Controllers Selection Notes

Select this component for designs requiring precise frequency control via a trimmed oscillator and robust cycle-by-cycle current limiting. The SOIC-8 package suits space-constrained surface-mount layouts. Ensure the application voltage levels align with the specified UVLO thresholds and that the thermal environment remains within the -40°C to +105°C operational range for reliable performance.

DC DC Switching Controllers Part Context

This part belongs to the UC3842B series of current mode controllers, which are engineered for cost-effective power supply solutions with minimal external components. The series includes variants like UC3843B tailored for different input voltage requirements. These controllers integrate essential functions such as temperature-compensated references and high-gain error amplifiers into a single compact IC.

DC DC Switching Controllers Replacement Considerations

Compatible substitutes include UC3842BD1 and UC3842BD1R2G from onsemi, which share identical pinouts and electrical characteristics. Cross-brand replacements require careful verification of pin compatibility and parameter alignment.