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UC2845A from LINFINITY

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UC2845A

Manufacturer: LINFINITY

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
UC2845A LINFINITY 600 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER The UC2845A is a high-performance current-mode PWM controller manufactured by LINFINITY. Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Input Voltage Range:** 8V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Reference Voltage:** 5V (±1%)  
- **Quiescent Current:** 11mA (typical)  
- **Error Amplifier Bandwidth:** 1MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Options:** DIP-8, SOIC-8  

### **Descriptions:**  
- The UC2845A is a fixed-frequency pulse-width modulation (PWM) controller optimized for high-performance DC-DC converters.  
- It operates in current-mode control, providing improved loop response and simplified feedback compensation.  
- The device includes an undervoltage lockout (UVLO) feature, ensuring reliable startup and shutdown.  
- It is widely used in switch-mode power supplies (SMPS), battery chargers, and industrial power systems.  

### **Features:**  
- **Current-Mode Control:** Enhances transient response and simplifies loop compensation.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Programmable Oscillator:** Allows flexible frequency adjustment via external components.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Internal Trimmed Bandgap Reference:** Provides stable 5V reference (±1% accuracy).  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  

This information is based on the manufacturer's datasheet for the UC2845A from LINFINITY.

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