UCC3895N

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UCC3895N

IC OFFLINE SW FULL-BRDG 20DIP

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Thông số kỹ thuật

Part Status Active
Base Product Number UCC3895
Output Type PWM
Output Configuration Positive
Topology Phase-Shifted Full-Bridge
Number of Outputs 1
Output Phases 1
Voltage - Supply (Vcc/Vdd) 10V ~ 16.5V
Frequency - Switching 1MHz
Duty Cycle (Max) 100%
Clock Sync Yes
Control Features Frequency Control, Soft Start, Sync
Operating Temperature 0°C ~ 70°C (TA)
Mounting Type Through Hole
Package 20-DIP (0.300", 7.62mm)
Supplier Device Package 20-PDIP
Packaging Bulk, Tube

Tổng quan

Description

The UCC3895N is a high-performance, voltage mode, PWM (pulse-width modulation) controller designed for power supply applications. It is primarily used in synchronous rectified, buck, and boost converters, providing efficient power management for various electronic devices. Key features include a wide input voltage range, programmable switching frequency, and adjustable output voltage, which make it suitable for both fixed and variable output applications.
The chip supports features like soft start, current limiting, and thermal shutdown, enhancing its reliability and performance. With its ability to drive external MOSFETs, the UCC3895N enables high efficiency and reduces power losses, making it ideal for use in telecommunications, computing, and industrial applications. Its compact 16-pin TSSOP package allows for easy integration into various circuit designs.
Overall, the UCC3895N is a versatile and efficient choice for designers looking to implement robust power supply solutions.

Features

The UCC3895N is a high-performance voltage-mode PWM controller designed for use in switch-mode power supplies. Key features include:
1. Wide Input Voltage Range: Operates from 4.5V to 40V, suitable for a variety of applications.
2. Programmable Dead Time: Allows optimization of switching losses and efficiency.
3. Built-in Soft Start: Reduces inrush current during power-up, enhancing system reliability.
4. Frequency Modulation: Supports adjustable switching frequency, typically ranging from 100 kHz to 1 MHz.
5. Error Amplifier: Integrated error amplifier for voltage regulation and output stability.
6. Adjustable Duty Cycle: Offers flexibility in output power control.
7. Enable/Disable Function: Allows easy shutdown for power-saving modes.
8. Thermal Shutdown Protection: Prevents overheating and potential damage to the system.
9. TO-220 Package: Facilitates easy thermal management and mounting.
These features make the UCC3895N ideal for applications such as DC-DC converters and other power regulation systems.

Package

The UCC3895N is typically packaged in a Dual In-Line Package (DIP) format, specifically a 14-pin DIP. This package type allows for easy integration into circuits and is suitable for through-hole mounting on printed circuit boards.

Pinout

The UCC3895N is a high-performance PWM (Pulse Width Modulation) controller designed for use in various power supply applications. It has a total of 16 pins.
### Pin Count and Functions:
1. Pin 1 (CSN): Current sense negative input.
2. Pin 2 (CS): Current sense positive input.
3. Pin 3 (VREF): Reference voltage output.
4. Pin 4 (COMP): Compensation node for error amplifier.
5. Pin 5 (FB): Feedback input for error amplifier.
6. Pin 6 (RAMP): Ramp voltage input.
7. Pin 7 (CT): Timing capacitor connection.
8. Pin 8 (RT): Timing resistor connection.
9. Pin 9 (VCC): Power supply input.
10. Pin 10 (GND): Ground connection.
11. Pin 11 (OUT): PWM output to the gate drive.
12. Pin 12 (DR): Driver output for external MOSFET.
13. Pin 13 (SLOPE): Compensation for slope compensation.
14. Pin 14 (ILIM): Current limit adjustment.
15. Pin 15 (SS): Soft-start control.
16. Pin 16 (SENSE): Additional current sense input.
This device is commonly used in applications requiring efficient power management and control.

Manufacturer

The UCC3895N is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments specializes in designing and manufacturing semiconductors and various integrated circuits, including analog, mixed-signal, and digital signal processing (DSP) components. The company is known for its innovation in the electronics industry, serving a wide range of markets, including automotive, industrial, consumer electronics, and communications. TI is recognized for its commitment to providing high-quality, reliable products and solutions that enhance system performance across various applications.

Application

The UCC3895N is a high-performance, synchronous buck controller used in various applications, including power supplies for servers, telecommunications, and industrial equipment. It is suitable for generating high-efficiency voltage regulation in DC-DC converters, telecom power systems, and battery management systems. Additionally, it can be applied in automotive power management and LED drivers, thanks to its ability to handle multiple output channels and provide precise voltage regulation while minimizing power loss.

Equivalent

The UCC3895N is a PWM controller commonly used in power supplies. Equivalent products include the TL494, SG3525, and LM5022. These alternatives may have similar features, but always check the specific datasheets for compatibility in terms of voltage, current ratings, and operational requirements.

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