UC1854L/883BC

$41.69

Description：1.5 A POWER FACTOR DUAL MARKED (
Series：*

SKU:f4efe0eb0082 Category: Application Specific Microcontrollers Brand: Texas Instruments

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Product introduction

Product Detailed Parameters

Description：1.5 A POWER FACTOR DUAL MARKED (
Series：*
Mfr：Texas Instruments
Package：Bulk
Applications：-
Core Processor：-
Program Memory Type：-
Controller Series：-
RAM Size：-
Interface：-
Number of I/O：-
Voltage - Supply：-
Operating Temperature：-
Mounting Type：-
Package / Case：-
Supplier Device Package：-
Grade：-
Qualification：-

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UC1854L/883BC

Overview

The UC1854L/883BC is a high-power factor preregulator controller manufactured by Texas Instruments, designed for military and aerospace applications. It operates as an average current mode control PFC controller with a maximum switching frequency of 200 kHz. The device supports a supply voltage range of 10 V to 20 V and functions within a temperature range of -55 °C to +125 °C. Packaged in a ceramic CQCC-20 (CQCC20) surface-mount configuration, it features a push-pull output driver capable of sourcing up to 2.2 A. This component integrates essential protection mechanisms including undervoltage lockout, overcurrent limiting, and soft-start functionality.

Feature Summary

Military-grade qualification with extended temperature range (-55 °C to +125 °C)
Average current mode control topology for high power factor correction
Push-pull output stage with 2.2 A drive capability
Integrated soft-start and cycle-by-cycle current limiting

Applications

High-reliability AC-DC power supplies for defense systems
Aerospace power conversion units requiring MIL-STD compliance
Industrial preregulators operating in extreme environmental conditions

Part Context

The UC1854L/883BC belongs to the UCx854 family of high-power factor preregulators. The 'L' suffix typically denotes the low-temperature grade variant within the UC18xx series, while '/883B' indicates processing according to MIL-PRF-38534 Class B specifications. This places the component within the broader portfolio of Unitrode-derived power management ICs now managed by Texas Instruments, specifically targeting ruggedized electronics where standard commercial parts are insufficient.

Replacement Considerations

Direct pin-compatible replacements include the UC2854L/883BC (commercial temperature grade) or UC3854L/883BC (industrial temperature grade), provided the specific thermal requirements align. For non-military applications, the UC3854AN serves as a functional equivalent in PDIP-16 packaging, though package adaptation is required.

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Delivery time

In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.

Freight calculation

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Return and Refund

Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.