UC3854QTR-UN

$1.58

Description：1.5A, 118KHZ BIPOLAR, PQCC20
Series：-
Mfr：Unitrode
Package：Bulk

SKU:8c7e12880a47 Category: PFC (Power Factor Correction) Brand: Unitrode

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Product introduction

Product Detailed Parameters

Description：1.5A, 118KHZ BIPOLAR, PQCC20
Series：-
Mfr：Unitrode
Package：Bulk
Mode：Average Current
Frequency - Switching：200kHz
Voltage - Supply：10V ~ 20V
Operating Temperature：0°C ~ 70°C
Mounting Type：Surface Mount
Package / Case：20-LCC (J-Lead)
Supplier Device Package：20-PLCC (9x9)
Current - Startup：1.5 mA
Grade：-
Qualification：-

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UC3854QTR-UN

Overview

The UC3854QTR-UN is a power factor correction (PFC) integrated circuit manufactured by Unitrode. It operates as an average current mode controller with a switching frequency of 200 kHz. The device is housed in a 20-pin PLCC package measuring 9x9 mm. It supports a supply voltage range of 15 V to 30 V and includes internal functional blocks such as voltage and current error amplifiers, a multiplier, and a soft-start circuit.

Feature Summary

Implements average current mode control for high-performance power factor correction
Integrates voltage and current error amplifiers with a dedicated multiplier block
Includes internal soft-start functionality and protection logic

Applications

Power Factor Correction (PFC) pre-regulators
Average current mode PFC controllers
High-power-factor power supply designs

Procurement Notes

Verify the manufacturer designation matches Unitrode specifications rather than Texas Instruments equivalents. Confirm the 20-PLCC package format aligns with design requirements. Ensure the component meets the required operational temperature ranges and electrical characteristics defined in the official datasheet before procurement.

Selection Notes

Select this component for applications requiring average current mode PFC control. Verify compatibility with the 20-PLCC footprint during PCB layout. Consider the 200 kHz switching frequency when designing magnetic components. Ensure the input voltage range fits within the specified 15 V to 30 V limits for stable operation.

Part Context

This part belongs to the UC3854 family of power factor correction controllers originally developed by Unitrode. The Q suffix typically indicates military or extended temperature grade variants in some contexts, but verification against the specific Unitrode datasheet is required. The TR-UN suffix denotes tape and reel packaging.

Replacement Considerations

UC3854DWTR: Texas Instruments equivalent in SOIC-16 package. UC3854N: Texas Instruments equivalent in PDIP-16 package. Verify pinout compatibility and package dimensions before substitution.

How to buy

Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.

Payment Method

Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.

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

Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.

Mode of Transportation

We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.

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.