UCC28516DW

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-performance, low-power, voltage mode PWM controller
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Control and regulation of power supply systems
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Input Voltage Range: 4.5V to 28V
• Output Voltage Range: 0.8V to 6V
• Switching Frequency: 100kHz to 1MHz
• Operating Temperature Range: -40°C to 125°C
• Features: Adjustable soft-start, cycle-by-cycle current limit, overvoltage protection, undervoltage lockout, thermal shutdown

Detailed Pin Configuration

The UCC28516DW has the following pin configuration:

1. COMP: Compensation pin for external compensation network
2. FB: Feedback pin for regulating output voltage
3. CS: Current sense pin for monitoring inductor current
4. RT/CT: Timing resistor/capacitor connection pin for setting switching frequency
5. SS/TR: Soft-start/Tracking pin for controlling start-up behavior
6. VREF: Reference voltage output pin
7. GND: Ground pin
8. VCC: Supply voltage input pin
9. DRVH: High-side gate driver output pin
10. DRVL: Low-side gate driver output pin

Functional Features

• Voltage mode control with adjustable soft-start for smooth start-up
• Cycle-by-cycle current limit for reliable operation and protection
• Overvoltage protection to prevent damage to the load
• Undervoltage lockout to ensure proper operation under low voltage conditions
• Thermal shutdown to protect the IC from excessive temperature

Advantages and Disadvantages

Advantages: - High-performance and low-power design - Wide input and output voltage range - Adjustable soft-start for controlled start-up - Comprehensive protection features

Disadvantages: - Limited to voltage mode control only - Requires external compensation network for stability

Working Principles

The UCC28516DW is a voltage mode PWM controller used in power management applications. It operates by comparing the feedback voltage (FB) 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. The CS pin monitors the inductor current, enabling cycle-by-cycle current limit protection. The RT/CT pin sets the switching frequency by connecting timing resistor and capacitor. The SS/TR pin controls the soft-start behavior during start-up.

Detailed Application Field Plans

The UCC28516DW is commonly used in various power supply systems, including:

1. DC-DC Converters: Used in buck, boost, and flyback converters for efficient power conversion.
2. LED Lighting: Enables precise control of LED driver circuits for optimal brightness and efficiency.
3. Industrial Power Supplies: Provides reliable regulation and protection in industrial power systems.
4. Telecom Equipment: Used in telecom power supplies for stable and efficient operation.
5. Automotive Electronics: Suitable for automotive power management applications.

Detailed and Complete Alternative Models

1. UCC28517DW: Similar to UCC28516DW with additional features like adjustable slope compensation.
2. UCC28518DW: Higher voltage version of UCC28516DW with extended input voltage range.
3. UCC28519DW: Lower voltage version of UCC28516DW with reduced input voltage range.

These alternative models offer similar functionality and can be considered based on specific application requirements.

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