UCC2946PWTRG4

Overview

Category: Integrated Circuits (ICs)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode pulse width modulation (PWM) controller - Designed for use in power supply applications - Provides precise control of the output voltage and current

Package: TSSOP-16

Essence: UCC2946PWTRG4 is a voltage mode PWM controller that offers advanced features for efficient power supply designs.

Packaging/Quantity: The UCC2946PWTRG4 is available in a TSSOP-16 package. It is typically sold in reels of 2500 units.

Specifications

• Input Voltage Range: 4.5V to 15V
• Output Voltage Range: 0.8V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Switching Frequency: Up to 1MHz
• Maximum Duty Cycle: 100%
• Output Current: Up to 1A

Detailed Pin Configuration

The UCC2946PWTRG4 has the following pin configuration:

1. COMP: Compensation pin for external compensation network.
2. FB: Feedback pin for sensing the output voltage.
3. CS: Current sense pin for monitoring the output current.
4. GND: Ground reference for the IC.
5. VREF: Reference voltage output for external components.
6. RT/CT: Timing resistor/capacitor connection pins.
7. SS/TR: Soft-start and tracking control pin.
8. VCC: Power supply input for the IC.
9. DRVH: High-side gate driver output.
10. DRVL: Low-side gate driver output.
11. SYNC: Synchronization input for multiple ICs.
12. EN: Enable pin for turning on/off the IC.
13. UVLO: Undervoltage lockout pin for protection.
14. OVP: Overvoltage protection pin.
15. PGND: Power ground reference for the IC.
16. VSENSE: Voltage sense input for monitoring the output voltage.

Functional Features

• Voltage mode control with adjustable frequency and duty cycle.
• Soft-start function for controlled startup of the power supply.
• Overvoltage protection (OVP) to prevent damage to the load.
• Undervoltage lockout (UVLO) for reliable operation under low voltage conditions.
• Synchronization capability for parallel operation of multiple ICs.
• Current sense input for accurate monitoring of the output current.

Advantages and Disadvantages

Advantages: - High-performance PWM controller for precise voltage regulation. - Wide input and output voltage ranges for versatile applications. - Compact TSSOP-16 package for space-constrained designs. - Adjustable frequency and duty cycle for flexible power supply designs. - Comprehensive protection features for enhanced reliability.

Disadvantages: - Limited maximum output current of 1A. - Requires external compensation network for stability.

Working Principles

The UCC2946PWTRG4 operates based on the voltage mode control technique. It compares the feedback voltage from the FB pin with a reference voltage to generate an error signal. This error signal is then amplified and used to control the duty cycle of the PWM signal, which regulates the output voltage. The soft-start function gradually increases the duty cycle during startup to prevent excessive inrush current. The UVLO and OVP features protect the power supply and load from voltage-related issues.

Detailed Application Field Plans

The UCC2946PWTRG4 is commonly used in various power supply applications, including: - Switching power supplies - DC-DC converters - Battery chargers - LED drivers - Industrial control systems

Detailed and Complete Alternative Models

1. UCC28070: Voltage mode PWM controller with integrated high-voltage startup circuit.
2. UC3843: Current mode PWM controller with adjustable frequency and duty cycle.
3. LT1241: High-performance voltage mode PWM controller with wide input voltage range.

These alternative models offer similar functionality and can be considered as substitutes for the UCC2946PWTRG4 in different applications.

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