UCC2946TPWRQ1

Overview

Category: Integrated Circuit (IC)

Use: Voltage Mode PWM Controller

Characteristics: - High-performance voltage mode controller - Designed for use in automotive applications - Provides precise control over power supply output voltage - Offers protection features for enhanced reliability

Package: TSSOP-14

Essence: UCC2946TPWRQ1 is a voltage mode PWM controller that is specifically designed for automotive applications. It provides accurate control over the output voltage of power supplies, ensuring stable and reliable operation.

Packaging/Quantity: The UCC2946TPWRQ1 is available in a TSSOP-14 package. It is typically sold in reels containing 2500 units.

Specifications

• Input Voltage Range: 4.5V to 40V
• Output Voltage Range: 0.8V to 36V
• Maximum Duty Cycle: 100%
• Oscillator Frequency Range: 50kHz to 1MHz
• Operating Temperature Range: -40°C to 125°C

Detailed Pin Configuration

The UCC2946TPWRQ1 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 input pin for current limit protection.
4. GND: Ground reference pin.
5. VREF: Reference voltage output pin.
6. RT/CT: Timing resistor/capacitor connection pin.
7. SS/TR: Soft-start/Tracking pin for controlling start-up behavior.
8. VCC: Power supply input pin.
9. OUT: Output pin for connecting to the power supply output.
10. SYNC: Synchronization input pin for synchronizing multiple controllers.
11. EN: Enable pin for turning the controller on/off.
12. UVLO: Undervoltage lockout pin for protection against low input voltage.
13. PGND: Power ground reference pin.
14. SS/TR: Soft-start/Tracking pin for controlling start-up behavior.

Functional Features

• Voltage mode control with adjustable output voltage
• Adjustable soft-start time for controlled start-up behavior
• Current limit protection for enhanced reliability
• Synchronization capability for multiple controllers
• Undervoltage lockout for protection against low input voltage

Advantages and Disadvantages

Advantages: - High-performance controller designed for automotive applications - Precise control over power supply output voltage - Protection features enhance system reliability - Adjustable soft-start time for controlled start-up - Synchronization capability for multiple controllers

Disadvantages: - Limited to a maximum duty cycle of 100% - Requires external compensation network for stability

Working Principles

The UCC2946TPWRQ1 operates on the voltage mode control principle. It compares the feedback voltage from the FB pin with a reference voltage (VREF) to regulate the output voltage. The COMP pin is used to connect an external compensation network to stabilize the control loop and ensure proper operation.

The controller uses a current sense input (CS) to monitor the output current and provide current limit protection. It also features an undervoltage lockout (UVLO) function to protect against low input voltage conditions.

Detailed Application Field Plans

The UCC2946TPWRQ1 is widely used in various automotive applications, including: - Automotive power supplies - Battery chargers - LED lighting systems - Motor control circuits - Audio amplifiers

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the UCC2946TPWRQ1 are: - LM5039: High-voltage PWM controller with integrated MOSFET drivers - UC3843: Current-mode PWM controller with adjustable frequency and duty cycle - LT1241: High-performance PWM controller with wide input voltage range

These alternative models offer similar functionality and can be suitable replacements depending on specific application requirements.

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