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UC1843AJ from TI,Texas Instruments

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UC1843AJ

Manufacturer: TI

Current Mode PWM Controller

Partnumber Manufacturer Quantity Availability
UC1843AJ TI 382 In Stock

Description and Introduction

Current Mode PWM Controller The UC1843AJ is a high-performance current-mode PWM controller manufactured by Texas Instruments (TI). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Operating Voltage Range:** 8.2V to 30V  
- **Output Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Bandwidth:** 1MHz  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin DIP (PDIP)  

### **Descriptions:**  
The UC1843AJ is designed for high-efficiency power supply applications, providing precise regulation and fast transient response. It incorporates features such as cycle-by-cycle current limiting, soft-start control, and undervoltage lockout (UVLO).  

### **Features:**  
- **Current-Mode Operation:** Improved loop response and simplified compensation.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation at startup.  
- **Programmable Soft-Start:** Reduces inrush current.  
- **Precision Reference:** 5V ±1% trimmed bandgap reference.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  
- **Low Startup Current:** Typically 0.5mA.  
- **Wide Operating Temperature Range:** Suitable for industrial applications.  

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

(Source: Texas Instruments Datasheet for UC1843AJ)

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