UCC2809PWTR-1

Product Overview

Category: Integrated Circuit (IC)

Use: Power Management

Characteristics: - High-performance current mode PWM controller - Designed for offline and DC-to-DC power supplies - Provides precise control of the output voltage and current - Offers protection features such as overvoltage and overcurrent protection

Package: TSSOP-16

Essence: The UCC2809PWTR-1 is a high-performance current mode PWM controller used in power management applications. It provides precise control of the output voltage and current, making it suitable for various power supply designs.

Packaging/Quantity: The UCC2809PWTR-1 is available in a TSSOP-16 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Input Voltage Range: 8V to 18V
• Output Voltage Range: 0V to 5V
• Operating Temperature Range: -40°C to 85°C
• Maximum Duty Cycle: 100%
• Switching Frequency: 50kHz to 1MHz
• Output Current: Up to 500mA

Pin Configuration

The UCC2809PWTR-1 has the following pin configuration:

1. VREF: Reference voltage input
2. COMP: Error amplifier output
3. FB: Feedback voltage input
4. CS: Current sense input
5. RT/CT: Timing resistor/capacitor connection
6. GND: Ground
7. VDD: Supply voltage input
8. DRVH: High-side gate driver output
9. DRVL: Low-side gate driver output
10. SYNC: Synchronization input
11. SS/TR: Soft-start/timing capacitor connection
12. UVLO: Undervoltage lockout input
13. OVP: Overvoltage protection input
14. EN/UV: Enable/undervoltage lockout input
15. VSENSE: Voltage sense input
16. VCC: Supply voltage output

Functional Features

• Current mode control for improved stability and transient response
• Adjustable switching frequency for optimization of efficiency and size
• Soft-start function to reduce inrush current during startup
• Overvoltage protection to safeguard the power supply and connected devices
• Undervoltage lockout for reliable operation under low voltage conditions

Advantages and Disadvantages

Advantages: - High-performance controller for precise power management - Wide input voltage range allows for versatile applications - Protection features enhance system reliability - Adjustable switching frequency enables optimization of efficiency

Disadvantages: - Limited output current capability (up to 500mA) - Requires external components for complete power supply design - Relatively small package size may require careful PCB layout considerations

Working Principles

The UCC2809PWTR-1 operates on the principle of current mode control, where the current flowing through the power switch is sensed and used as a feedback signal. This feedback signal is compared with a reference voltage to generate an error signal, which is then amplified and used to adjust the duty cycle of the PWM signal. By regulating the duty cycle, the controller maintains precise control over the output voltage and current.

Detailed Application Field Plans

The UCC2809PWTR-1 can be used in various power management applications, including: - Offline power supplies - DC-to-DC converters - LED drivers - Battery chargers - Industrial power systems

Its wide input voltage range, adjustable switching frequency, and protection features make it suitable for different application scenarios.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the UCC2809PWTR-1 include: - UCC2809PW - UCC2809DW - UCC2809MDW

These models may have slight differences in specifications or package options, but they serve as viable alternatives for power management designs.

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