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UC3843 from N/A

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5.005ms

UC3843

Manufacturer: N/A

SMPS Controller

Partnumber Manufacturer Quantity Availability
UC3843 N/A 63 In Stock

Description and Introduction

SMPS Controller The UC3843 is a high-performance current-mode PWM controller manufactured by various companies, as it is a widely used standard IC.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Operating Frequency:** Up to 500 kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Output Drive Current:** ±1A (peak)  
- **Supply Voltage (VCC):** 8.5V to 30V  
- **UVLO (Undervoltage Lockout):** On: 8.4V (typ), Off: 7.6V (typ)  
- **Reference Voltage:** 5V (±1%)  
- **Error Amplifier Bandwidth:** 1 MHz  
- **Current Sense Comparator:** Adjustable current limit  
- **Package Options:** DIP-8, SOIC-8  

### **Descriptions and Features:**  
- Designed for DC-DC converter applications.  
- Includes a trimmed oscillator for precise frequency control.  
- Features automatic feed-forward compensation.  
- Latching PWM for cycle-by-cycle current limiting.  
- Internal undervoltage lockout (UVLO) ensures proper startup.  
- Low startup and operating current.  
- Compatible with voltage-mode and current-mode topologies.  

The UC3843 is commonly used in power supplies, battery chargers, and SMPS (Switched-Mode Power Supply) designs.

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