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UC2844BNG

Name: UC2844BNG
Rating: 4.7 (12 reviews)

IC REG CTRLR PWM CM 8-DIP

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規格

Part Status	Active
Output Type	Transistor Driver
Function	Step-Up, Step-Up/Step-Down
Output Configuration	Positive, Isolation Capable
Topology	Boost, Flyback
Number of Outputs	1
Output Phases	1
Voltage - Supply (Vcc/Vdd)	10V ~ 36V
Frequency - Switching	Up to 500kHz
Duty Cycle (Max)	48%
Synchronous Rectifier	No
Clock Sync	No
Control Features	Frequency Control
Operating Temperature	-25°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Base Product Number	UC2844

概述

Description

The UC2844BNG is a high-performance, current-mode PWM controller designed for use in switch-mode power supplies (SMPS). It features a wide input voltage range, typically from 10 to 30 V, making it suitable for various applications, including industrial and consumer electronics.
Key features of the UC2844BNG include an adjustable frequency operation, typically set between 100 kHz and 500 kHz, allowing for flexibility in design. It has built-in overcurrent protection, soft start, and a non-inverting input for current sensing, enhancing reliability and efficiency.
The device operates with a simple external component count, making it easier to implement in various applications. It also supports a variety of topologies, including flyback, boost, and buck converters.
The UC2844BNG is available in a 14-pin, dual-inline package (DIP), facilitating easy integration into existing designs. Its robustness and versatility make it an excellent choice for engineers looking to optimize power supply designs.

Features

The UC2844BNG is a high-performance current mode pulse width modulation (PWM) controller designed for power supply applications. Key features include:
1. Voltage Mode Control: It provides precise control over output voltage.
2. Current Sensing: Integrates current sensing for improved regulation and protection.
3. High-Speed Operation: Capable of switching frequencies up to 500 kHz, allowing for compact designs.
4. Wide Input Voltage Range: Supports input voltages from 10V to 30V, suitable for various applications.
5. Programmable Dead Time: Enables optimization of the power stage for efficiency.
6. Soft Start: Reduces inrush current and improves startup performance.
7. Thermal Shutdown: Protects against overheating.
8. Integrated Error Amplifier: Simplifies feedback loop design.
9. Low Standby Current: Enhances efficiency in off-mode conditions.
These features make the UC2844BNG ideal for applications such as switch-mode power supplies (SMPS), DC-DC converters, and other power management solutions.

Package

The UC2844BNG is available in a DIP (Dual In-line Package) form factor, specifically a 14-pin version. This package type is designed for ease of mounting on PCBs and provides good thermal performance for integrated circuits.

Pinout

The UC2844BNG is a high-performance, fixed-frequency current mode PWM (Pulse Width Modulation) controller used in power supply applications. It features a total of 8 pins.
### Pin Count and Functions:
1. Pin 1 (VCC): Supply voltage. Powers the IC.
2. Pin 2 (GND): Ground reference.
3. Pin 3 (VREF): Reference voltage output (5V), used for feedback.
4. Pin 4 (COMP): Compensation input for controlling loop stability.
5. Pin 5 (CS): Current sense input for current mode control.
6. Pin 6 (IN+ / VIN): Positive input for the voltage feedback loop.
7. Pin 7 (IN- / VFB): Negative input for the voltage feedback loop.
8. Pin 8 (OUT): Output to drive the power stage (usually a MOSFET).
This configuration makes the UC2844BNG suitable for a variety of switching power supply designs, including buck, boost, and flyback converters.

Manufacturer

The UC2844BNG is manufactured by Texas Instruments (TI), a leading American technology company. Founded in 1930, Texas Instruments is known for designing and manufacturing semiconductors and various integrated circuits, which are used in a wide range of electronics applications. The company specializes in analog and embedded processing products, serving diverse industries such as automotive, industrial automation, consumer electronics, and telecommunications. TI is recognized for its innovation and contributions to the field of electronics, offering a broad portfolio of products that includes power management solutions, microcontrollers, and digital signal processors.

Application

The UC2844BNG is a PWM controller primarily used in switch-mode power supplies (SMPS), including isolated and non-isolated applications. It is suitable for designing power converters such as flyback, buck, and boost converters. Key application areas include telecommunications equipment, industrial power supplies, battery chargers, LED drivers, and consumer electronics, where efficiency and performance are critical. Its features also support voltage regulation and control in various power management systems.

Equivalent

The UC2844BNG is a current-mode PWM controller. Equivalent products include:
1. LM2244 - Texas Instruments
2. SG6844 - Sanken Electric
3. L6563 - STMicroelectronics
4. UC3844 - Similar in function but with different specifications.
5. TPS40210 - Texas Instruments (for specific applications).
Always check datasheets for specific features and electrical characteristics when considering replacements.