Description

UCC28600DR

Description

The UCC28600DR is a high-performance, quasi-resonant flyback converter controller. It is designed to provide high efficiency and low standby power consumption, making it suitable for a wide range of applications, including adapters, chargers, and power supplies.

Features

• Quasi-resonant operation for high efficiency
• Low standby power consumption
• High-frequency operation for compact design
• Programmable overcurrent protection
• Overvoltage protection
• Under-voltage lockout
• Soft-start and burst mode operation
• Low EMI emissions

Specifications

• Input Voltage: 85-265VAC
• Output Voltage: 12VDC
• Output Current: 0.5-2A
• Efficiency: Up to 90%
• Standby Power: Less than 0.5W
• Operating Frequency: 40-100kHz
• Junction Temperature: -40 to 125°C
• Package: 8-pin SOIC

Applications

• Adapters
• Chargers
• Power supplies
• LED drivers
• Industrial power supplies
• Consumer electronics

Block Diagram

The UCC28600DR block diagram consists of the following components:

1. Voltage Regulator: Regulates the input voltage to the required level.
2. Oscillator: Generates the high-frequency clock signal for the converter.
3. Error Amplifier: Compares the output voltage to the reference voltage and adjusts the duty cycle accordingly.
4. Overcurrent Protection: Detects and responds to overcurrent conditions.
5. Overvoltage Protection: Detects and responds to overvoltage conditions.
6. Soft-start and Burst Mode: Controls the startup and low-load conditions of the converter.

Pin Configuration

The UCC28600DR has the following pin configuration:

1. VIN: Input voltage
2. VCC: Power supply for the IC
3. GND: Ground
4. CS: Current sense
5. FB: Feedback
6. RT: Oscillator resistor
7. CT: Oscillator capacitor
8. DRV: Gate drive output

Parameter

The UCC28600DR has the following parameters:

• UVLO Threshold: 10V
• OVP Threshold: 18V
• Overcurrent Threshold: 1.5A
• Soft-start Time: 10ms
• Burst Mode Duty Cycle: 20%

Please note that the specific parameters and values mentioned are crucial for the UCC28600DR’s performance and functionality, and any changes to these parameters may affect the device’s behavior and efficiency.