High Performance Power Factor Preregulator The UC3855ADWTR is a power factor correction (PFC) controller manufactured by Texas Instruments (TI). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Texas Instruments (TI)
- **Part Number:** UC3855ADWTR
- **Package:** SOIC-16 (DW)
- **Type:** Power Factor Correction (PFC) Controller
- **Operating Temperature Range:** -40°C to +85°C
- **Input Voltage Range:** Typically operates with high-voltage inputs (up to 600V)
- **Switching Frequency:** Adjustable, typically up to 200kHz
- **Output Drive:** High-current totem-pole output (up to 1.5A peak)
- **Control Method:** Average current mode control
- **Supply Voltage (VCC):** 12V to 18V (typical)
- **Reference Voltage:** 7.5V (internal reference)
### **Descriptions:**
- The UC3855ADWTR is a high-performance PFC controller designed for boost-type power factor correction circuits.
- It implements average current mode control to achieve near-unity power factor and low harmonic distortion.
- Suitable for AC-DC power supplies, industrial systems, and applications requiring compliance with power quality standards (e.g., IEC 61000-3-2).
- Features a multiplier-based control loop for accurate input current shaping.
### **Features:**
- **Power Factor Correction (PFC):** Ensures high power factor (>0.99) and low THD (Total Harmonic Distortion).
- **Average Current Mode Control:** Provides precise input current shaping.
- **Wide Input Voltage Range:** Supports universal AC line inputs (85VAC to 265VAC).
- **Programmable Switching Frequency:** Allows optimization for efficiency and EMI performance.
- **Overvoltage Protection (OVP):** Monitors output voltage to prevent excessive voltage conditions.
- **Undervoltage Lockout (UVLO):** Ensures proper operation within supply voltage limits.
- **Soft-Start Function:** Reduces inrush current during startup.
- **Multiplier/Divider Circuit:** Enables accurate current loop control.
- **High-Current Gate Drive:** Supports MOSFET or IGBT drivers (1.5A peak output current).
- **Low Standby Power Consumption:** Optimized for energy-efficient designs.
This information is strictly based on the manufacturer's datasheet and technical documentation.
