The DP2545 High Precision CC/CV Primary-Side PWM Power Switch is a high-performance offline controller designed for low power AC/DC chargers and adapters. Featuring Primary Side Regulation (PSR) technology, it eliminates the need for optocoupler and TL431 components, reducing system cost and improving reliability. With integrated high-precision Constant Voltage (CV) and Constant Current (CC) control, the DP2545 ensures stable output performance for battery chargers, small power adapters, and auxiliary power supplies. Its multi-mode PWM/PFM operation enhances efficiency while achieving less than 75mW standby power consumption.

DP2545 Datasheet

Features:

1. ±5% High Precision CV/CC Regulation – Stable constant voltage and current control at universal AC input.
2. Primary Side Regulation (PSR) – No need for optocoupler or TL431.
3. Multi-Mode PWM/PFM Operation – High efficiency across load conditions.
4. Low Standby Power – Less than 75mW standby consumption.
5. Programmable Output Settings – Adjustable CC point via external sense resistor.
6. Built-in Protection Functions – Cycle-by-cycle current limiting, UVLO, VDD OVP, OTP.
7. Audio Noise Free Operation – Suitable for charger and adapter applications.
8. 650V Built-in Power MOSFET – High voltage reliability.
9. This IC is widely used in SMPS drives and power supply solutions for low power AC/DC applications, making it ideal for charger and adapter circuit designs.

Specifications:

• Model: DP2545
• Package: DIP7
• Drain-Source Breakdown Voltage: 650V
• VDD Operating Voltage: 11V – 27V
• UVLO Start Threshold: 15V – 17.5V
• VDD OVP Threshold: 28V – 32V
• Current Limiting Threshold: 500mV (typ.)
• Thermal Shutdown: 165°C (typ.)
• Operating Temperature: -40°C to 85°C

Applications:

• Cell Phone Chargers
• Digital Camera Chargers
• Small Power Adapters
• Auxiliary Power Supplies (PC, TV, etc.)
• Linear Regulator / RCC Replacement

Package Includes:

1 × DP2545 CC/CV Primary Side PWM Controller IC - DIP7 Package