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UC3843AN. from UNITRODE

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UC3843AN.

Manufacturer: UNITRODE

SMPS Controller

Partnumber Manufacturer Quantity Availability
UC3843AN.,UC3843AN UNITRODE 944 In Stock

Description and Introduction

SMPS Controller The UC3843AN is a high-performance current-mode PWM controller manufactured by UNITRODE.  

### **Specifications:**  
- **Input Voltage Range:** 8.4V 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):** On at 8.4V (typ), Off at 7.6V (typ)  
- **Package:** 8-Pin DIP (Dual In-line Package)  

### **Descriptions and Features:**  
- **Current-Mode Control:** Provides precise regulation and improved transient response.  
- **Automatic Feed-Forward Compensation:** Simplifies loop stabilization.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Trimmed Oscillator Discharge Current:** Ensures consistent frequency control.  
- **Latching PWM for Cycle-by-Cycle Current Limiting:** Prevents multiple pulses during fault conditions.  
- **Internal Bandgap Reference:** Delivers a stable 5V reference for feedback control.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Power Consumption:** Optimized for efficiency in offline and DC-DC converters.  

The UC3843AN is widely used in switch-mode power supplies (SMPS), battery chargers, and DC-DC converters due to its reliability and performance.

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