TEA1751 PFC flyback controller IC SOP16

Description

TEA1751 PFC flyback controller IC SOP16

The TEA1751 is an integrated Power Factor Correction (PFC) and flyback controller IC designed for high-efficiency, low-standby-power SMPS (Switched-Mode Power Supplies). It combines PFC and quasi-resonant (QR) flyback control in a single chip, making it ideal for adapters, LED drivers, and TV power supplies.

Key Specifications of TEA1751 (SOP-16 Package):

1. General Parameters:

• Package: SOP-16 (Small Outline Package)

• Input Voltage Range (VCC): 8.5V – 38V (startup)

• Operating Supply Voltage (VCC): 11V – 25V (after startup)

• Standby Power Consumption: <30 mW (at 230V AC)

• Switching Frequency (PFC): Up to 100 kHz

• Switching Frequency (Flyback): Quasi-Resonant (QR) mode

2. PFC Controller Features:

• Power Factor Correction (PFC) Voltage Range: Up to 450V

• PFC Output Voltage Adjustable (via feedback)

• Critical Conduction Mode (CrM) for high efficiency

• Overvoltage Protection (OVP) for PFC

3. Flyback Controller Features:

• Quasi-Resonant (QR) Operation (for reduced switching losses)

• Frequency Foldback at Light Load (improves efficiency)

• Soft Switching (Valley Switching)

• Adjustable Peak Current Limiting

4. Protection Features:

• Overvoltage Protection (OVP)

• Overcurrent Protection (OCP)

• Over-Temperature Protection (OTP)

• Brownout Protection (Undervoltage Lockout – UVLO)

• Open-Loop Protection (OLP)

5. Applications:

• AC/DC Power Adapters (Notebook, TV, Monitor)

• LED Drivers (High-efficiency lighting)

• Industrial & Consumer SMPS

• Auxiliary Power Supplies

Pin Configuration (SOP-16):

Typical Application Circuit:

The TEA1751 requires:

• PFC Stage: MOSFET, inductor, diode, bulk capacitor

• Flyback Stage: Transformer, MOSFET, rectifier, feedback loop

• HV Startup Circuit (via pin 16)