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UC3843BD1G from ON,ON Semiconductor

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UC3843BD1G

Manufacturer: ON

High Performance Current Mode Controllers

Partnumber Manufacturer Quantity Availability
UC3843BD1G ON 2184 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC3843BD1G is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Topology:** Current-mode PWM control  
- **Input Voltage Range:** 8.5V to 30V (operating), 7.6V (UVLO turn-on), 7.2V (UVLO turn-off)  
- **Output Frequency:** Up to 500kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3843BD1G is designed for DC-DC converter applications, providing precise control over switching power supplies. It features an oscillator, a temperature-compensated reference, high-gain error amplifier, current sensing comparator, and a totem-pole output stage.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper start-up and shutdown.  
- **Cycle-by-Cycle Current Limiting:** Enhances system protection.  
- **Internal Trimmed Reference:** Reduces external component count.  
- **Low Startup Current:** Typically 0.5mA.  
- **High Output Drive:** Suitable for driving power MOSFETs directly.  

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

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