MIC38C42YN

AC DC Converters, Offline Switchers Overview

The MIC38C42YN is a monolithic switching mode power supply (SMPS) controller manufactured by Microchip Technology. It operates within a supply voltage range of 9V to 20V and supports multiple converter topologies including boost, buck, flyback, and forward configurations. The device features a fixed switching frequency of 500 kHz and provides a maximum duty cycle of 96%. It delivers a peak output drive current of 500 mA with rise and fall times of 40 ns and 30 ns, respectively. Designed for through-hole mounting, it is housed in an 8-DIP package and functions reliably across an operating temperature range of -40°C to +85°C.

AC DC Converters, Offline Switchers Feature Summary

• Supports versatile power conversion topologies including boost, buck, flyback, and forward converters.
• Provides high-current gate drive capability suitable for driving external power switches.
• Features frequency control characteristics for stable switching operation.

AC DC Converters, Offline Switchers Applications

• Isolated DC-DC converter designs using flyback or forward topologies
• Non-isolated step-up (boost) power supply circuits
• Non-isolated step-down (buck) power regulation systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'YN' corresponds to the 8-pin DIP package and through-hole configuration when sourcing. Confirm that the required duty cycle does not exceed the 96% limit for your topology. Ensure the input voltage remains within the 9V to 20V operational window. Check for moisture sensitivity handling requirements during assembly. Validate thermal performance within the specified ambient temperature range.

AC DC Converters, Offline Switchers Selection Notes

Select this component when a through-hole solution is required for SMPS applications. It is appropriate for designs needing up to 500 mA drive current at 500 kHz. Consider alternatives if surface-mount technology is preferred or if higher duty cycles are necessary. Evaluate compatibility with external MOSFETs regarding gate charge requirements. Assess system isolation needs as the controller supports isolated topologies.

AC DC Converters, Offline Switchers Part Context

This part belongs to the MIC38C4x series of monolithic SMPS controllers from Microchip Technology. The series offers various pinout and package options to accommodate different design constraints. The MIC38C42 variant specifically distinguishes itself with a 96% maximum duty cycle, differing from other family members like the MIC38C45 which limits duty cycle to 50%. This series targets general-purpose offline and DC-DC conversion needs.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers for MIC38C42YN are not available in the provided documentation. Verify functional equivalence with other MIC38C4x variants only if pinout and electrical specifications align exactly. Cross-referencing with generic industry equivalents requires independent validation against official datasheets.