UCC3946PWTRG4

Overview

Category: Integrated Circuit (IC)

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: The UCC3946PWTRG4 is an integrated circuit that serves as a voltage mode PWM controller. It is commonly used in power supply applications to regulate the output voltage and current.

Packaging/Quantity: The UCC3946PWTRG4 is available in a TSSOP-16 package. It is typically sold in reels or tubes containing multiple units.

Specifications

The UCC3946PWTRG4 has the following specifications:

• Input Voltage Range: 2.7V to 18V
• Output Voltage Range: 0.8V to 5.5V
• Maximum Duty Cycle: 100%
• Oscillator Frequency Range: 50kHz to 1MHz
• Operating Temperature Range: -40°C to 85°C

Pin Configuration

The UCC3946PWTRG4 has a total of 16 pins. The pin configuration is as follows:

1. COMP
2. FB
3. CS
4. GND
5. VREF
6. SS/TR
7. RT/CT
8. SYNC
9. VCC
10. NC
11. NC
12. NC
13. NC
14. NC
15. NC
16. DRV

Functional Features

The UCC3946PWTRG4 offers the following functional features:

• Voltage mode control with adjustable frequency and duty cycle
• Soft-start function for controlled startup
• Overcurrent protection
• Undervoltage lockout
• Error amplifier for precise voltage regulation
• Synchronization capability with an external clock signal

Advantages and Disadvantages

Advantages: - High-performance PWM controller for accurate voltage regulation - Wide input and output voltage range - Flexible frequency and duty cycle adjustment - Comprehensive protection features for enhanced reliability - Synchronization capability for system integration

Disadvantages: - Limited pin configuration options - Requires external components for complete power supply implementation - Relatively high cost compared to simpler PWM controllers

Working Principles

The UCC3946PWTRG4 operates based on the voltage mode control technique. It compares the feedback voltage (FB) with a reference voltage (VREF) to generate an error signal. This error signal is then amplified and used to adjust the duty cycle of the PWM signal, which controls the power switch in the power supply circuit. By continuously monitoring and adjusting the duty cycle, the UCC3946PWTRG4 ensures precise regulation of the output voltage.

Detailed Application Field Plans

The UCC3946PWTRG4 can be applied in various power supply applications, including but not limited to:

1. Switching Power Supplies
2. DC-DC Converters
3. Battery Chargers
4. LED Drivers
5. Industrial Power Systems

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the UCC3946PWTRG4:

1. LM5039 - Voltage Mode PWM Controller
2. UC3843 - Current Mode PWM Controller
3. LT1241 - High-Speed PWM Controller
4. MAX668 - Dual Output PWM Controller
5. SG3525 - Regulating Pulse Width Modulator

These alternative models can be considered based on specific application requirements and design constraints.

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