UCC38086PWRG4 - English Editing Encyclopedia Entry

Product Overview

Category

UCC38086PWRG4 belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

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

Characteristics

• UCC38086PWRG4 is a high-performance current mode controller that operates at a fixed frequency.
• It offers excellent line and load regulation, making it suitable for demanding power management applications.
• The device incorporates various protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown.
• It can operate from a wide input voltage range, typically from 9V to 30V.
• UCC38086PWRG4 provides precise control over output voltage and current, ensuring stable and efficient power delivery.

Package and Quantity

UCC38086PWRG4 is available in a small-sized surface-mount package known as TSSOP-14. It is supplied in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Input Voltage Range: 9V to 30V
• Output Voltage Range: Adjustable, depending on the application
• Operating Frequency: Fixed frequency operation, typically around 100 kHz
• Maximum Duty Cycle: 50%
• Quiescent Current: Typically 2.5 mA
• Temperature Range: -40°C to +125°C
• Package Type: TSSOP-14

Detailed Pin Configuration

1. COMP: Compensation pin for external compensation network.
2. FB: Feedback pin for regulating the output voltage.
3. CS: Current sense pin for monitoring the output current.
4. RT/CT: Timing components connection pin for setting the oscillator frequency.
5. GND: Ground reference pin.
6. VREF: Reference voltage output pin.
7. VCC: Power supply input pin.
8. UVLO: Undervoltage lockout pin for enabling/disabling the device.
9. EN/UV: Enable/Undervoltage lockout control pin.
10. SS/TR: Soft-start/Timing resistor connection pin.
11. RT/CT: Timing components connection pin for setting the oscillator frequency.
12. SYNC: Synchronization input pin for synchronizing multiple devices.
13. DRVH: High-side gate driver output pin.
14. DRVL: Low-side gate driver output pin.

Functional Features

• Current Mode Control: UCC38086PWRG4 utilizes current mode control architecture, providing excellent line and load regulation.
• Protection Features: The device incorporates various protection features such as overvoltage protection (OVP), undervoltage lockout (UVLO), and thermal shutdown, ensuring safe operation.
• Adjustable Frequency: The timing components connected to the RT/CT pins allow users to adjust the operating frequency according to their specific requirements.
• Soft-Start Function: The SS/TR pin enables a soft-start function, gradually ramping up the output voltage during startup to prevent excessive inrush current.

Advantages and Disadvantages

Advantages

• Excellent line and load regulation for stable power management applications.
• Wide input voltage range allows for versatile use in different systems.
• Incorporates comprehensive protection features for enhanced reliability.
• Adjustable frequency and soft-start function provide flexibility in design.

Disadvantages

• Limited maximum duty cycle of 50% may restrict certain applications requiring higher duty cycles.
• TSSOP-14 package may pose challenges for hand soldering due to its small size.

Working Principles

UCC38086PWRG4 operates based on the current mode control principle. It compares the sensed current flowing through the power switch with a reference voltage to generate a control signal. This control signal regulates the duty cycle of the power switch, ensuring stable output voltage and current.

The device continuously monitors the output voltage and adjusts the duty cycle accordingly to maintain regulation. The feedback loop, compensation network, and error amplifier play crucial roles in achieving precise control over the output.

Detailed Application Field Plans

UCC38086PWRG4 finds extensive application in various power management systems, including: - Switch-mode power supplies (SMPS) for computers, televisions, and industrial equipment. - Battery chargers for portable devices, electric vehicles, and renewable energy systems. - LED drivers for lighting applications, both residential and commercial.

Its wide input voltage range, excellent regulation, and protection features make it suitable for demanding applications in these fields.

Detailed and Complete Alternative Models

1. UCC28086PWRG4: Similar to UCC38086PWRG4, but with enhanced features such as higher maximum duty cycle and wider operating temperature range.
2. UCC38083PWRG4: A lower-power