Natural Interleaving(TM) Transition-Mode PFC Controller with Improved Audible Noise Immunity 16-SOIC -40 to 125 The UCC28061DRG4 is a transition-mode PFC controller manufactured by Texas Instruments (TI).
### **Specifications:**
- **Topology:** Transition-Mode (Boundary Conduction Mode - BCM) Power Factor Correction (PFC)
- **Input Voltage Range:** 85 VAC to 265 VAC
- **Output Voltage Range:** Adjustable (typically up to 400 VDC)
- **Switching Frequency:** Variable, depending on load and line conditions
- **Maximum Duty Cycle:** 97%
- **Operating Temperature Range:** -40°C to +105°C
- **Package:** SOIC-8
- **Control Method:** Average Current Mode Control
- **Startup Current:** 40 µA (typical)
- **Supply Voltage (VCC):** 10.5 V to 21 V
- **Peak Gate Drive Current:** ±1.5 A
### **Descriptions:**
The UCC28061DRG4 is a high-performance PFC controller designed for AC-DC power supplies. It operates in transition mode (BCM) to improve efficiency and reduce switching losses. It features average current mode control for accurate power factor correction and low THD (Total Harmonic Distortion).
### **Features:**
- **Natural Interleaving:** Supports two-phase operation for reduced input/output ripple
- **Low THD:** Optimized for high power factor (>0.99)
- **Integrated Boost Diode Emulator:** Simplifies gate drive timing
- **Programmable Frequency Clamp:** Limits maximum switching frequency
- **Overvoltage Protection (OVP):** Protects against output overvoltage
- **Brownout Protection:** Detects low input voltage conditions
- **Soft-Start:** Reduces inrush current during startup
- **Low Quiescent Current:** Improves light-load efficiency
This PFC controller is commonly used in applications such as LED lighting, industrial power supplies, and server power systems.
