UCC38083PWRG4 - English Editing Encyclopedia Entry

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management IC

Characteristics: - High-performance current mode PWM controller - Designed for off-line and DC-to-DC converter applications - Provides necessary features to implement a complete power supply control system

Package: TSSOP (Thin Shrink Small Outline Package)

Essence: The UCC38083PWRG4 is an integrated circuit that serves as a high-performance current mode PWM controller. It is primarily used in power management applications, specifically in off-line and DC-to-DC converter systems. The IC offers various features required to implement a comprehensive power supply control system.

Packaging/Quantity: The UCC38083PWRG4 is available in a TSSOP package. The quantity may vary depending on the supplier.

Specifications

The UCC38083PWRG4 has the following specifications:

• Input Voltage Range: 7 V to 20 V
• Output Voltage Range: 0 V to 5 V
• Operating Temperature Range: -40°C to +125°C
• Maximum Duty Cycle: 100%
• Frequency Range: 50 kHz to 1 MHz
• Output Current: 500 mA

Detailed Pin Configuration

The UCC38083PWRG4 has a total of 16 pins. Here is the detailed pin configuration:

1. COMP: Compensation pin
2. CS: Current sense input pin
3. RT/CT: Timing resistor/capacitor connection pin
4. SS/TR: Soft-start/Tracking pin
5. GND: Ground pin
6. VREF: Reference voltage output pin
7. VDD: Supply voltage input pin
8. FB: Feedback input pin
9. INV: Inverting input pin
10. EN/UVLO: Enable/Undervoltage lockout pin
11. SYNC: Synchronization input pin
12. VCC: Supply voltage output pin
13. DRVH: High-side gate driver output pin
14. DRVL: Low-side gate driver output pin
15. BOOT: Bootstrap capacitor connection pin
16. NC: No connection pin

Functional Features

The UCC38083PWRG4 offers the following functional features:

1. Current Mode Control: The IC utilizes current mode control to regulate the output voltage and maintain stability.
2. Soft-Start Function: The soft-start feature ensures a gradual increase in output voltage during startup, preventing excessive current flow.
3. Undervoltage Lockout (UVLO): The UVLO function protects the system by disabling the IC when the supply voltage falls below a certain threshold.
4. Synchronization Capability: The synchronization input allows the IC to synchronize its operation with an external clock signal.
5. Gate Driver Outputs: The high-side and low-side gate driver outputs facilitate the control of power switches in the converter circuit.

Advantages and Disadvantages

Advantages: - High-performance PWM controller for efficient power management - Comprehensive set of features for power supply control systems - Wide input and output voltage range for versatile applications - Synchronization capability for precise timing requirements

Disadvantages: - Limited output current capacity (500 mA) - Requires additional external components for complete power supply implementation

Working Principles

The UCC38083PWRG4 operates based on the current mode control principle. It compares the sensed current from the power stage with a reference voltage to regulate the output voltage. By adjusting the duty cycle of the PWM signal, the IC maintains stable output voltage despite load variations. The soft-start function gradually increases the duty cycle during startup to prevent excessive current flow. The UVLO feature ensures that the IC operates within a safe voltage range, protecting the system from potential damage.

Detailed Application Field Plans

The UCC38083PWRG4 is commonly used in various power management applications, including:

1. Switching Power Supplies: The IC is suitable for designing efficient and compact switching power supplies used in electronic devices such as computers, televisions, and industrial equipment.
2. LED Lighting: It can be employed in LED driver circuits to regulate the current and ensure proper illumination.
3. Battery Chargers: The IC can be utilized in battery charger systems to control the charging process and protect the batteries from overcharging or excessive current flow.
4. Motor Control: It can be integrated into motor control circuits to regulate the power supply and control the speed and direction of motors.

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the UCC38083PWRG4:

1. UC3843: Current Mode PWM Controller
2. TL494: Pulse Width Modulation Control Circuit
3. SG3525: Voltage Mode PWM Controller
4. IRS2153D: Half-Bridge Driver IC with