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UC3843BVN from ON,ON Semiconductor

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UC3843BVN

Manufacturer: ON

High Performance Current Mode Controller

Partnumber Manufacturer Quantity Availability
UC3843BVN ON 58 In Stock

Description and Introduction

High Performance Current Mode Controller The UC3843BVN is a current-mode PWM controller manufactured by ON Semiconductor. Below are the key specifications, descriptions, and features from Ic-phoenix technical data files:

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

### **Descriptions:**  
- The UC3843BVN is designed for DC-DC converter applications, providing precise control for switching power supplies.  
- It includes an oscillator, error amplifier, current sensing comparator, and a totem-pole output stage.  
- Features under-voltage lockout (UVLO) with hysteresis for reliable startup.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Adjustable Frequency:** Set via external resistor and capacitor.  
- **Low Startup Current:** Typically 0.5mA.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Latching PWM for Cycle-by-Cycle Current Limiting:** Ensures robust fault handling.  

This information is strictly based on the manufacturer's datasheet for factual accuracy.

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