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UC2845D8TR from TI,Texas Instruments

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UC2845D8TR

Manufacturer: TI

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC2845D8TR TI 2500 In Stock

Description and Introduction

Current-Mode PWM Controller The UC2845D8TR is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VCC):** 7.6V to 30V  
- **Output Frequency:** Up to 500kHz  
- **Duty Cycle:** 0% to 100%  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC2845D8TR is designed for offline and DC-DC converter applications. It provides precise duty cycle control with current-mode operation, improving loop response and simplifying compensation. It includes features like under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a trimmed oscillator for accurate frequency control.  

### **Features:**  
- **Current-Mode Operation:** Enhances transient response and simplifies loop compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **Trimmed Oscillator:** Provides accurate frequency control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Low Start-Up Current (≤1mA):** Reduces power consumption during start-up.  

This device is commonly used in power supplies, battery chargers, and DC-DC converters.

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