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UCC2891D from ti,Texas Instruments

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7.813ms

UCC2891D

Manufacturer: ti

Current Mode Active Clamp PWM Controller

Partnumber Manufacturer Quantity Availability
UCC2891D ti 50 In Stock

Description and Introduction

Current Mode Active Clamp PWM Controller The UCC2891D is a phase-shifted full-bridge controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 10V to 17V  
- **Operating Frequency Range:** 50kHz to 1MHz  
- **Output Drive Current:** ±2A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Propagation Delay:** 50ns (typical)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** SOIC-16  

### **Descriptions:**  
The UCC2891D is a high-performance PWM controller designed for phase-shifted full-bridge (PSFB) topologies. It provides precise control for power converters, enabling efficient power delivery in applications such as telecom, industrial, and computing power supplies.  

### **Features:**  
- **Adaptive Delay Control:** Minimizes circulating current for improved efficiency.  
- **Programmable Dead Time:** Adjusts dead time between switches to optimize performance.  
- **Soft Start/Stop:** Reduces inrush current during startup.  
- **Synchronizable Oscillator:** Allows synchronization to an external clock.  
- **Overcurrent Protection:** Includes cycle-by-cycle current limiting.  
- **Bootstrap Driver Support:** Simplifies high-side gate drive implementation.  

This information is sourced from the official Texas Instruments datasheet for the UCC2891D.

Partnumber Manufacturer Quantity Availability
UCC2891D TI/UNITRODE 23 In Stock

Description and Introduction

Current Mode Active Clamp PWM Controller The UCC2891D is a high-performance phase-shifted full-bridge controller manufactured by Texas Instruments (TI) under the UNITRODE brand.  

### **Specifications:**  
- **Topology:** Phase-shifted full-bridge  
- **Control Method:** Voltage mode  
- **Frequency Range:** Up to 1 MHz  
- **Operating Voltage (VDD):** 15V (typical)  
- **Maximum Duty Cycle:** 50% (per switch)  
- **Output Drive:** Dual 2A peak gate drivers  
- **Protection Features:**  
  - Programmable soft-start  
  - Overcurrent protection (cycle-by-cycle)  
  - Under-voltage lockout (UVLO)  
- **Package:** SOIC-16  

### **Descriptions and Features:**  
- Designed for high-power DC-DC converters (typically 200W to 2kW).  
- Enables zero-voltage switching (ZVS) for improved efficiency.  
- Includes adaptive delay control to optimize dead time for ZVS.  
- Compatible with both MOSFETs and IGBTs.  
- Integrated synchronous rectifier control for secondary-side regulation.  
- Adjustable oscillator frequency with external resistor and capacitor.  
- Low start-up current (typically 150 µA).  

For detailed electrical characteristics and application circuits, refer to the official TI/UNITRODE datasheet.

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