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UC3843DTR from UNITRODE

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UC3843DTR

Manufacturer: UNITRODE

Current-Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC3843DTR UNITRODE 1490 In Stock

Description and Introduction

Current-Mode PWM Controller The UC3843DTR is a high-performance current-mode PWM controller manufactured by UNITRODE. Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 8V 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):**  
  - Turn-on: 8.4V (typical)  
  - Turn-off: 7.6V (typical)  
- **Package:** SOIC-8  

### **Descriptions:**  
- The UC3843DTR is a fixed-frequency pulse-width modulation (PWM) controller optimized for DC-DC converter applications.  
- It features current-mode control for improved loop response and simplified feedback compensation.  
- Includes a trimmed oscillator for precise duty cycle control and a temperature-compensated reference.  

### **Features:**  
- **Current-Mode Operation:** Enhances transient response and simplifies loop stabilization.  
- **Automatic Feed-Forward Compensation:** Improves line regulation.  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.  
- **Latching PWM for Cycle-by-Cycle Current Limiting:** Ensures reliable overload protection.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Startup and Operating Current:** Reduces power consumption.  

This information is sourced from UNITRODE's official documentation.

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