GreenLine™ Compact Power Factor Controller: Innovative Circuit for Cost Effective Solutions The MC33260 is a power factor correction (PFC) controller manufactured by ON Semiconductor. Below are its key specifications, descriptions, and features:
### **Specifications:**
- **Input Voltage Range:** 8.5V to 18V (VCC)
- **Operating Frequency:** Adjustable up to 250kHz
- **Start-Up Current:** Typically 50µA
- **Quiescent Current:** Typically 4mA
- **Output Drive Current:** ±1.5A (peak)
- **Error Amplifier Bandwidth:** 5MHz
- **Maximum Duty Cycle:** 95%
- **Operating Temperature Range:** -40°C to +105°C
### **Description:**
The MC33260 is a high-performance, low-power PFC controller designed for pre-regulators in AC-DC power supplies. It operates in critical conduction mode (CrM) to improve power factor and reduce harmonic distortion. The IC integrates a multiplier, error amplifier, and PWM control for efficient power factor correction.
### **Features:**
- **Critical Conduction Mode (CrM) Operation** – Ensures high power factor and low distortion.
- **Low Start-Up and Operating Current** – Enhances energy efficiency.
- **Internal Start-Up Timer** – Simplifies design and reduces external components.
- **Overvoltage Protection (OVP)** – Safeguards against excessive output voltage.
- **Zero Current Detection (ZCD)** – Ensures operation at the boundary of discontinuous conduction.
- **Multiplier for Wide Input Range** – Supports universal AC input (85VAC to 265VAC).
- **Programmable Oscillator Frequency** – Allows flexible system design.
- **Under-Voltage Lockout (UVLO)** – Ensures reliable operation within safe voltage limits.
The MC33260 is commonly used in power supplies for LED lighting, industrial systems, and consumer electronics requiring power factor correction.
(Source: ON Semiconductor Datasheet)
