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UC3844BN from TI,Texas Instruments

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UC3844BN

Manufacturer: TI

High performance current mode PWM controller

Partnumber Manufacturer Quantity Availability
UC3844BN TI 800 In Stock

Description and Introduction

High performance current mode PWM controller The UC3844BN is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Output Current (Gate Drive):** 1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Reference Voltage (VREF):** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP or SOIC  

### **Descriptions:**  
The UC3844BN is a fixed-frequency PWM controller designed for DC-DC converter and offline power supply applications. It features current-mode control for improved transient response and cycle-by-cycle current limiting.  

### **Features:**  
- **Current-Mode Operation** for precise control  
- **Automatic Feed-Forward Compensation**  
- **Latching PWM** for cycle-by-cycle current limiting  
- **Undervoltage Lockout (UVLO)** with hysteresis  
- **Internal Trimmed Bandgap Reference** (5V)  
- **High-Current Totem Pole Output** (1A peak)  
- **Low Start-Up Current** (<1mA)  
- **Compatible with Voltage-Mode or Current-Mode Topologies**  

The UC3844BN is commonly used in switch-mode power supplies (SMPS), battery chargers, and flyback converters.

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