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UC1843 from TI,Texas Instruments

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UC1843

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC1843 TI 2 In Stock

Description and Introduction

Current Mode PWM Controller The UC1843 is a pulse width modulation (PWM) controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features based on Ic-phoenix technical data files:

### **Specifications:**
- **Topology:** Current-mode PWM controller  
- **Operating Voltage Range:** 8V to 30V (recommended)  
- **Maximum Duty Cycle:** 100%  
- **Switching Frequency:** Up to 500 kHz  
- **Output Current (Peak):** ±1A (sink/source)  
- **Reference Voltage:** 5V (±1% tolerance)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**
- The UC1843 is designed for high-performance DC-DC converters and power supply applications.  
- It features current-mode control for improved loop response and simplified compensation.  
- Includes an under-voltage lockout (UVLO) function to ensure proper operation within the specified voltage range.  
- Suitable for flyback, forward, and boost converter designs.  

### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop design.  
- **Precision Reference:** 5V reference with tight tolerance (±1%) for accurate regulation.  
- **Programmable Oscillator:** Allows adjustable switching frequency via external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Error Amplifier:** High-gain bandwidth for precise voltage regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable operation by disabling the output below the minimum voltage threshold.  
- **Totem Pole Output:** Capable of driving power MOSFETs or IGBTs directly.  

This information is strictly based on the manufacturer's datasheet and technical documentation.

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