UC2845AQD

Power Supply Controllers, Monitors Overview

The UC2845AQD is a current-mode PWM controller manufactured by Texas Instruments, designed for high-performance DC-DC switching applications. It operates within an extended industrial temperature range of -40°C to +125°C and utilizes a 14-pin SOIC package. The device supports Boost, Flyback, and Forward topologies with a maximum switching frequency of 500 kHz. Key electrical parameters include a 1 A output drive capability, a 5 V reference voltage, and a maximum duty cycle of 50%. It features low startup current and integrated protection functions suitable for power supply designs.

Power Supply Controllers, Monitors Feature Summary

• Current-mode control architecture for improved line regulation and transient response
• Integrated oscillator with external timing resistor and capacitor synchronization
• High-side driver capable of sourcing and sinking 1 A peak current
• Built-in under-voltage lockout with hysteresis for reliable startup

Power Supply Controllers, Monitors Applications

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

Power Supply Controllers, Monitors Procurement Notes

Verify component authenticity through authorized distributors or TI direct channels. Confirm the specific suffix indicates the 14-pin SOIC package variant. Check RoHS compliance status as manufacturing processes may evolve. Ensure storage conditions meet moisture sensitivity level requirements prior to assembly.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing isolated or non-isolated converters requiring current-mode control. Compare pin compatibility with legacy UC3845 variants if replacing existing designs. Evaluate thermal performance within the 14-SOIC package constraints. Consider the 50% maximum duty cycle limitation for forward topology implementations.

Power Supply Controllers, Monitors Part Context

This part belongs to the UC2845A family of current-mode PWM controllers from Texas Instruments. It shares functional similarities with the UC3845 series but offers enhanced automotive-grade reliability specifications. The device is widely used in industrial power conversion systems where robust operation across wide temperature ranges is required.

Power Supply Controllers, Monitors Replacement Considerations

UC2845BDR2G by onsemi is documented as a similar replacement option.