UC2854BQG3

Overview

The UC2854BQG3 is an enhanced high-power factor preregulator controller manufactured by Texas Instruments. It operates within a supply voltage range of 10 V to 20 V and supports switching frequencies up to 115 kHz. The device features current-mode control with pulse width modulation for precise regulation. It is housed in a 16-pin QSOP package and is rated for operation across an extended temperature range from -55 °C to +125 °C, ensuring reliability in demanding industrial environments.

Feature Summary

• Integrated zero-power detection capability for improved efficiency at light loads
• Current-mode control architecture utilizing pulse width modulation
• Extended industrial temperature rating suitable for harsh operating conditions

Applications

• High-power factor preregulators in AC-DC power supplies
• Power factor correction circuits for industrial equipment
• Advanced power supply designs requiring sinusoidal input current shaping

Procurement Notes

Verify the specific suffix 'Q' indicates the QSOP package and 'G3' confirms lead-free and RoHS compliance status against the official datasheet. Confirm the manufacturer source is Texas Instruments or an authorized distributor. Ensure the component matches the 16-pin QSOP physical outline and electrical specifications before procurement.

Selection Notes

Select this component when an extended temperature range down to -55 °C is required compared to standard commercial variants. The QSOP package offers a compact surface-mount solution for space-constrained designs. Verify that the 115 kHz maximum switching frequency aligns with the magnetic component design requirements of the target application.

Part Context

This part belongs to the UCx854 family of high-power factor preregulators from Texas Instruments. It serves as an advanced version of the original UC2854, offering enhanced performance characteristics. The family is designed to provide power limiting with sinusoidal input currents, addressing harmonic distortion requirements in power conversion systems.

Replacement Considerations

Public confirmed substitutes include UC2854BDW and UC2854AN. Verify pin compatibility and thermal performance when substituting between different package types such as SOIC or PDIP.