UC2844ANG4

Power Supply Controllers, Monitors Overview

The UC2844ANG4 is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance switching power supply applications. It operates within a supply voltage range of 10V to 30V and features a maximum switching frequency of 500 kHz. The device supports Buck, Boost, Flyback, and Forward topologies with a maximum duty cycle of 50%. It utilizes an 8-pin PDIP package for through-hole mounting and provides a 1A output drive capability. The operational temperature range spans from -40°C to 85°C.

Power Supply Controllers, Monitors Feature Summary

• Implements current-mode control architecture for precise regulation in switching power supplies
• Features integrated oscillator with external timing resistor/capacitor for flexible frequency setting up to 500 kHz
• Includes undervoltage lockout (UVLO) circuitry to ensure stable startup and shutdown behavior
• Provides high-current push-pull output stage capable of driving power MOSFETs directly

Power Supply Controllers, Monitors Applications

• Flyback converter designs for isolated power supplies
• Forward converter implementations requiring single-ended output
• Boost and Buck non-isolated DC-DC conversion circuits
• Universal input AC-DC adapter power stages

Power Supply Controllers, Monitors Procurement Notes

Verify the component marking matches UC2844ANG4 to confirm the G4 suffix indicates lead-free compliance and specific packaging configuration. Ensure the supplier provides traceability documentation consistent with Texas Instruments manufacturing standards. Cross-reference the datasheet revision to confirm pinout compatibility with existing PCB layouts before finalizing procurement orders.

Power Supply Controllers, Monitors Selection Notes

Select this component when through-hole assembly is required for robust mechanical connection in industrial environments. The 8-pin DIP format simplifies prototyping and manual soldering compared to surface-mount alternatives. Consider the 50% duty cycle limit when designing forward converters; use the UC2845 variant if higher duty cycles are necessary for specific transformer turns ratios.

Power Supply Controllers, Monitors Part Context

This part belongs to the UCx84x family of current-mode PWM controllers, representing a standard industry reference design for offline and DC-DC conversion. The 'G4' suffix specifically denotes a lead-free, halogen-free product compliant with environmental directives while maintaining electrical performance identical to the standard UC2844AN variant.

Power Supply Controllers, Monitors Replacement Considerations

• UC2844AN

Power Supply Controllers, Monitors FAQ

What is the maximum switching frequency supported by the UC2844ANG4?

The device supports a maximum switching frequency of 500 kHz, determined by the external timing resistor and capacitor connected to the RT/CT pins.

Does the UC2844ANG4 support synchronous rectification?

No, the UC2844ANG4 is a standard current-mode PWM controller with a push-pull output stage designed for driving primary-side switches; it does not include dedicated synchronous rectification control outputs.