UC3851N

$16.25

Description：IC OFFLINE SWITCH MULT TOP 18DIP
Series：-
Mfr：Texas Instruments
Package：Bulk,Tube

SKU:8cf08303acc9 Category: AC DC Converters, Offline Switchers Brand: Texas Instruments

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Product introduction

UC3851N is listed in the AC DC Converters, Offline Switchers range at ChipApex. The manufacturer field lists Texas Instruments. Its product description is IC OFFLINE SWITCH MULT TOP 18DIP. Review the specifications below when checking this part for your BOM.

AC DC Converters, Offline Switchers specifications for UC3851N

Description：IC OFFLINE SWITCH MULT TOP 18DIP
Series：-
Mfr：Texas Instruments
Package：Bulk,Tube
Output Isolation：-
Internal Switch(s)：No
Voltage - Breakdown：-
Topology：Boost, Buck, Flyback, Forward
Voltage - Start Up：8 V
Voltage - Supply (Vcc/Vdd)：7.8V ~ 32V
Duty Cycle：50%
Frequency - Switching：Up to 500kHz
Fault Protection：Current Limiting, Over Voltage
Control Features：Frequency Control, Soft Start
Operating Temperature：0°C ~ 70°C (TA)
Package / Case：18-DIP (0.300", 7.62mm)
Supplier Device Package：18-PDIP
Mounting Type：Through Hole
Grade：-
Qualification：-
Power (Watts)：-

AC DC Converters, Offline Switchers datasheet and documents for UC3851N

UC3851N

AC DC Converters, Offline Switchers Overview

The UC3851N is a programmable, off-line PWM controller manufactured by Texas Instruments. It supports boost, buck, flyback, and forward topologies with a switching frequency range of 50 kHz to 500 kHz. The device features a maximum duty cycle of 46% (or 50% in some configurations) and operates from an 8V start-up voltage. It is housed in an 18-pin DIP package and functions within a temperature range of 0°C to +70°C.

AC DC Converters, Offline Switchers Feature Summary

Integrates all control, driving, monitoring, and protection functions for complete power management solutions.
Includes a low-current off-line start circuit to reduce standby power consumption.
Supports voltage feed-forward capabilities for improved line regulation.

AC DC Converters, Offline Switchers Applications

High-power factor pre-regulators
Universal input offline power supplies
Battery chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific datasheet revision and ordering suffix when sourcing. Confirm that the 18-pin DIP package matches your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Cross-reference the manufacturer part number to avoid counterfeit components.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring high power factor correction and universal AC input compatibility. It is suitable for designs needing integrated protection and monitoring without external discrete logic. Consider the 18-pin package size for board space constraints compared to smaller surface-mount alternatives.

AC DC Converters, Offline Switchers Part Context

This part belongs to the UC385x series of power factor controllers. It is designed for use in switch-mode power supplies where efficiency and power quality are critical. The device complements other UC38xx family members by offering specific features for PFC applications.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct pin-compatible substitutes within the UC385x family. Verify electrical parameters such as switching frequency and current limits against the original design requirements before substitution.