UCC38085D

Product Overview

Category

UCC38085D belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This IC is commonly used in various power supply designs, including switch-mode power supplies (SMPS), battery chargers, and LED drivers.

Characteristics

• High efficiency: UCC38085D offers high efficiency due to its low-power consumption and optimized design.
• Wide input voltage range: It can operate with a wide input voltage range, making it suitable for different power supply applications.
• Protection features: The IC incorporates various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown.
• Adjustable frequency: The operating frequency of UCC38085D can be adjusted to optimize performance based on specific requirements.

Package

UCC38085D is available in a small outline integrated circuit (SOIC) package. This package provides ease of handling and compatibility with standard PCB manufacturing processes.

Essence

The essence of UCC38085D lies in its ability to efficiently regulate and control power in various applications, ensuring stable and reliable operation.

Packaging/Quantity

UCC38085D is typically packaged in reels or tubes, containing a specified quantity of ICs per package. The exact packaging and quantity may vary depending on the supplier.

Specifications

• Input Voltage Range: 8V to 18V
• Output Voltage Range: 0.8V to 15V
• Maximum Output Current: 1A
• Operating Temperature Range: -40°C to +125°C
• Switching Frequency Range: 50kHz to 1MHz

Detailed Pin Configuration

UCC38085D has a total of 8 pins, each serving a specific function:

1. VDD: Power supply pin for the IC.
2. COMP: Compensation pin for feedback control.
3. FB: Feedback pin for voltage regulation.
4. CS: Current sense pin for current monitoring.
5. RT/CT: Timing components connection pins.
6. GND: Ground reference pin.
7. OUT: Output pin for regulated power supply.
8. EN/UVLO: Enable/Undervoltage lockout pin.

Functional Features

• Voltage Regulation: UCC38085D provides precise voltage regulation, ensuring stable output voltages even under varying load conditions.
• Current Limiting: The IC incorporates a current sense mechanism to limit the output current, protecting the circuit and connected devices from excessive current flow.
• Soft Start: UCC38085D features a soft start function that gradually ramps up the output voltage, reducing inrush current and preventing voltage spikes.
• Frequency Adjustment: The operating frequency of the IC can be adjusted externally, allowing optimization for different applications.
• Protection Mechanisms: The IC includes various protection features such as overvoltage protection, undervoltage lockout, and thermal shutdown to safeguard against potential faults or failures.

Advantages and Disadvantages

Advantages

• High efficiency leads to reduced power consumption.
• Wide input voltage range enables versatility in power supply designs.
• Compact SOIC package facilitates easy integration into PCB layouts.
• Adjustable frequency allows optimization for specific applications.
• Comprehensive protection mechanisms enhance system reliability.

Disadvantages

• Limited maximum output current may restrict usage in high-power applications.
• Requires external timing components for frequency adjustment.

Working Principles

UCC38085D operates based on the principle of pulse width modulation (PWM). It regulates the output voltage by controlling the duty cycle of the switching waveform. By adjusting the duty cycle, the IC maintains a stable output voltage regardless of input variations or load changes.

The IC continuously monitors the output voltage and compares it with a reference voltage. Any deviation between the two triggers the control circuitry to adjust the duty cycle accordingly. This feedback loop ensures precise voltage regulation.

Detailed Application Field Plans

UCC38085D finds applications in various power management systems, including: - Switch-mode power supplies (SMPS) for computers, telecommunication equipment, and industrial machinery. - Battery chargers for portable devices, electric vehicles, and renewable energy systems. - LED drivers for lighting applications, both residential and commercial.

Detailed and Complete Alternative Models

• UCC38083D: Similar to UCC38085D but with a lower maximum output current of 0.5A.
• UCC38086D: Similar to UCC38085D but with an extended input voltage range of 8V to 24V.
• UCC38089D: Similar to UCC38085D but with additional protection features such as overcurrent protection and short-circuit protection.

These alternative models offer similar functionality and can be considered based on specific requirements and system constraints.

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