NCT3945S TR

Description：IC LINEAR FAN DRIVER 8SOP
Series：-
Mfr：Nuvoton Technology Corporation
Package：Tape & Reel (TR)

SKU:c14b386605d8 Category: Motor Drivers, Controllers Brand: Nuvoton Technology Corporation

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Product introduction

Product Detailed Parameters

Description：IC LINEAR FAN DRIVER 8SOP
Series：-
Mfr：Nuvoton Technology Corporation
Package：Tape & Reel (TR)
Motor Type - Stepper：-
Motor Type - AC, DC：-
Function：-
Output Configuration：-
Interface：-
Technology：-
Step Resolution：-
Applications：-
Current - Output：-
Voltage - Supply：-
Voltage - Load：-
Operating Temperature：-
Mounting Type：-
Package / Case：-
Supplier Device Package：-
Grade：-
Qualification：-

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NCT3945S TR

Overview

The NCT3945S TR is a linear fan driver integrated circuit manufactured by Nuvoton Technology Corporation, designed for controlling DC brushless fans. It operates within a supply voltage range of 8V to 17.6V and supports a load voltage of the same range. The device features a low-side output configuration with a maximum output current of 500mA. It utilizes PMOS technology and accepts an on/off interface signal. The component is housed in an 8-SOIC package with an exposed pad (8-SOP-EP) and is rated for an operating temperature range of -20°C to 125°C (TJ).

Feature Summary

Integrates full control and power stages for linear fan driving applications.
Supports low-side output configuration for direct connection to DC brushless fans.
Operates reliably across a wide industrial temperature range.

Applications

Linear fan driver circuits
DC brushless fan speed control systems

Procurement Notes

Verify the exact suffix and packaging variant when sourcing, as availability may vary. Confirm that the 8-SOP-EP package matches the target PCB footprint. Check for any specific assembly site transfer notices or product change notifications issued by Nuvoton. Ensure the design accommodates the thermal requirements associated with the exposed pad structure for adequate heat dissipation during operation.

Selection Notes

Select this component for applications requiring a simple on/off control interface for linear fan regulation. The 500mA output current capability suits standard small to medium-sized cooling fans. The wide input voltage range allows compatibility with various system power rails. Consider the thermal performance of the 8-SOP-EP package when designing the PCB layout to ensure stable operation under load.

Part Context

The NCT3945S belongs to the NCT394x series of linear fan drivers from Nuvoton. This family includes variants such as the NCT3940S and NCT3941S, which offer different voltage ranges and output configurations. The NCT3945S specifically targets higher voltage applications compared to the 5V variants in the series, providing a dedicated solution for robust fan control in computing and industrial environments.