UCC2802NG4

Power Supply Controllers, Monitors Overview

The UCC2802NG4 is a low-power BiCMOS current-mode PWM controller manufactured by Texas Instruments. It is designed for offline and DC-DC converter applications requiring high efficiency at light loads. The device operates within a supply voltage range of 3.6V to 12V and supports switching frequencies up to 1MHz. It features a fixed 31kHz frequency for cold start-up, which transitions to the programmed frequency once regulation begins. The component is housed in an 8-pin PDIP package with a through-hole mounting style.

Power Supply Controllers, Monitors Feature Summary

• Integrated programmable oscillator allows flexible switching frequency selection
• Fixed 31kHz cold start-up frequency ensures reliable initialization under low input conditions
• Current-mode control architecture provides inherent line feed-forward and cycle-by-cycle current limiting
• Low quiescent current operation enhances system efficiency during standby modes

Power Supply Controllers, Monitors Applications

• Offline flyback power supplies
• Forward converters
• Push-pull converters
• DC-DC step-down regulators

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS status as per manufacturer documentation. Confirm the PDIP-8 package dimensions match your PCB footprint requirements. Check for obsolescence notices or PCN documents regarding manufacturing site changes. Ensure the operating temperature range meets your environmental specifications.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs prioritizing low standby power consumption and simple implementation. It is suitable for applications where cost-effective current-mode control is required without complex external compensation networks. Consider the maximum switching frequency limit when designing transformer parameters. Verify that the output drive capability meets the gate charge requirements of the selected MOSFETs.

Power Supply Controllers, Monitors Part Context

The UCC2802 belongs to Texas Instruments' family of low-power BiCMOS PWM controllers. It shares functional similarities with the UCC2800 and UCC2801 but offers specific pinout and feature variations tailored for different topology requirements. This series is widely used in consumer electronics and industrial power adapters due to its robust performance and ease of use.

Power Supply Controllers, Monitors Replacement Considerations

Direct pin-to-pin replacements may include the UCC2800 or UCC2801 series, subject to electrical parameter verification. Cross-reference datasheets for differences in supply voltage ranges, oscillator accuracy, and drive strength. Ensure any substitute component maintains compatibility with the existing feedback loop compensation network.