UC2875N

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UC2875N

IC OFFLINE SW FULL-BRDG 20DIP

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Spécifications

Part Status Active
Output Isolation Non-Isolated
Topology Full-Bridge
Voltage - Supply (Vcc/Vdd) 9.5V ~ 20V
Duty Cycle 100%
Frequency - Switching 1MHz
Fault Protection Current Limiting
Control Features Frequency Control, Soft Start, Sync
Operating Temperature -25°C ~ 85°C (TA)
Package / Case 20-DIP (0.300", 7.62mm)
Supplier Device Package 20-PDIP
Mounting Type Through Hole
Base Product Number UC2875
Voltage - Start Up 10.75 V

Vue d'ensemble

Description

The UC2875N is a high-performance, integrated voltage mode controller designed for switch-mode power supplies (SMPS). It is commonly used in applications requiring regulated output voltage and high efficiency, such as power converters, industrial power supplies, and LED drivers.
Key features include:
1. Voltage Mode Control: Offers precise regulation and improved transient response.
2. Built-in PWM: Features a pulse-width modulation scheme that enhances efficiency and reduces power loss.
3. Wide Input Voltage Range: Typically supports input voltages from 8V to 40V, making it suitable for various applications.
4. Protection Features: Includes overcurrent protection, thermal shutdown, and undervoltage lockout, ensuring safe operation.
5. Flexible Output Configuration: Can be configured for different topologies, including flyback and boost converters.
With its robust design and integrated features, the UC2875N is ideal for applications requiring reliable performance and efficiency in power conversion.

Features

The UC2875N is a high-performance, current mode PWM (Pulse Width Modulation) controller designed for switch-mode power supplies. Key features include:
1. Current Mode Control: Provides inherent overcurrent protection and simplifies loop compensation.
2. Wide Input Voltage Range: Operates from 8V to 30V, suitable for various applications.
3. Programmable Switching Frequency: Adjustable frequency range from 100 kHz to 500 kHz, allowing flexibility in design.
4. Internal Ramp Compensation: Helps stabilize control loops in high-duty cycle applications.
5. Soft Start Functionality: Reduces inrush current and smoothes start-up, enhancing system reliability.
6. Integrated Features: Includes a thermal shutdown, undervoltage lockout, and frequency jittering to reduce EMI.
7. Compact Package: Available in an 8-pin DIP or SOIC package, suitable for space-constrained designs.
These features make the UC2875N ideal for applications such as offline power supplies, battery chargers, and DC-DC converters.

Package

The UC2875N is typically available in a 16-pin dual in-line package (DIP) format. This package type features through-hole mounting, making it suitable for various circuit designs and prototyping applications.

Pinout

The UC2875N is a high-performance, power factor correction (PFC) controller IC. It features a 16-pin Dual In-line Package (DIP) configuration.
Pin Count and Functions:
1. Pin 1 - VDD: Power supply voltage.
2. Pin 2 - GND: Ground reference.
3. Pin 3 - CSN: Current sense negative input.
4. Pin 4 - CSP: Current sense positive input.
5. Pin 5 - COMP: Compensation network for voltage loop.
6. Pin 6 - VSENSE: Input for feedback voltage.
7. Pin 7 - RAMP: Ramp generator input.
8. Pin 8 - REF: Reference voltage output.
9. Pin 9 - FBP: Feedback pin for error amplifier.
10. Pin 10 - RCS: For current sense resistor.
11. Pin 11 - BOOT: Bootstrap capacitor connection for gate drive.
12. Pin 12 - GATE: Gate output for driving switches.
13. Pin 13 - DIAG: Fault diagnosis pin.
14. Pin 14 - VCC: Supply voltage for internal circuitry.
15. Pin 15 - CSREF: Reference voltage for current sensing.
16. Pin 16 - LEB: Leading edge blanking input.
This versatile IC is commonly used in AC-DC converters for efficient power management.

Manufacturer

The UC2875N is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments specializes in designing and producing semiconductors and electronics systems, with a strong focus on analog and embedded processing solutions. Founded in 1930, the company has evolved into one of the leading semiconductor manufacturers globally, catering to a wide range of industries, including automotive, industrial, communications, and consumer electronics. TI is known for its innovation in various electronic components, including microcontrollers, digital signal processors, and power management ICs, making it a key player in the electronics market.

Application

The UC2875N is primarily used in power supply applications, including switch-mode power supplies (SMPS), AC-DC converters, and DC-DC converters. It is suitable for applications requiring high efficiency, such as battery chargers, LED drivers, and telecom power supplies. Additionally, its features support energy-saving designs and improved voltage regulation in various consumer and industrial electronics.

Equivalent

Equivalent products to the UC2875N chip include the TL494, SG3525, and MC34063. These chips are also used in power supply applications, providing functions such as PWM control and feedback regulation similar to the UC2875N. Always check the specific datasheets for compatibility in features and specifications.

Expédition

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Référence des frais d'expédition (DHL/FedEx):

DHL: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 2 à 5 jours ouvrables.

FedEx: Les frais d'expédition varient de 25 à 40 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

UPS: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

TNT: Les frais d'expédition varient de 25 à 65 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

EMS: Les frais d'expédition varient de 30 à 50 $ (0,5 kg), avec un délai de livraison estimé de 7 à 15 jours ouvrables.

Courrier aérien enregistré: Le coût d'expédition est de 2 à 4 $ (0,1 kg), avec un délai de livraison estimé de 5 à 20 jours ouvrables.

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