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UC3843ADR2G from ON,ON Semiconductor

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UC3843ADR2G

Manufacturer: ON

High Performance Current Mode Controllers

Partnumber Manufacturer Quantity Availability
UC3843ADR2G ON 25000 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC3843ADR2G is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VCC):** 8.5V to 30V (operating), 7.6V (UVLO threshold)  
- **Output Frequency:** Up to 500 kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Gain Bandwidth:** 1 MHz  
- **Reference Voltage:** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3843ADR2G is designed for DC-DC converter applications, providing precise voltage regulation with current-mode control. It features an oscillator, temperature-compensated reference, high-gain error amplifier, current sensing comparator, and a totem-pole output stage.  

### **Features:**  
- **Current-Mode Operation:** Enhances loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup and shutdown.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Internal Trimmed Reference:** 5V with ±1% accuracy.  
- **Adjustable Oscillator Frequency:** Set by external components.  
- **Low Startup Current:** Typically 0.5 mA.  
- **Latching PWM for Overvoltage Protection:** Improves system reliability.  

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

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