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UC3843BD from ON,ON Semiconductor

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UC3843BD

Manufacturer: ON

HIGH PERFORMANCE CURRENT MODE CONTROLLERS

Partnumber Manufacturer Quantity Availability
UC3843BD ON 2145 In Stock

Description and Introduction

HIGH PERFORMANCE CURRENT MODE CONTROLLERS The UC3843BD is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Duty Cycle:** 0% to 100%  
- **Output Current (Peak):** ±1A  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Low Startup Current:** <1mA  
- **Undervoltage Lockout (UVLO):** 8.4V (on) / 7.6V (off)  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3843BD is designed for DC-DC converter applications, providing precise control for switching power supplies. It features a trimmed oscillator for accurate duty cycle control, current sensing, and a totem-pole output stage for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Operation** for improved loop response  
- **Automatic Feed-Forward Compensation**  
- **Latching PWM** for cycle-by-cycle current limiting  
- **Internal Soft-Start**  
- **High-Current Totem-Pole Output**  
- **Low RO (Output Impedance)** for fast switching  
- **Under-Voltage Lockout (UVLO)** with hysteresis  

This IC is widely used in offline and DC-DC converters, battery chargers, and power supply applications.

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