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UC2843BD from ST,ST Microelectronics

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15.625ms

UC2843BD

Manufacturer: ST

High Performance Current Mode Controller

Partnumber Manufacturer Quantity Availability
UC2843BD ST 1360 In Stock

Description and Introduction

High Performance Current Mode Controller The UC2843BD is a high-performance current-mode PWM controller manufactured by STMicroelectronics. Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** STMicroelectronics  
- **Category:** PWM Controller  
- **Topology:** Current-Mode  
- **Output Type:** Single-Ended  
- **Switching Frequency:** Up to 500 kHz  
- **Duty Cycle Max:** 100%  
- **Supply Voltage (VCC):** 8.2V to 30V  
- **UVLO (Undervoltage Lockout):** On: 8.4V (typ), Off: 7.6V (typ)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC2843BD is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter applications. It operates in current-mode control, providing precise regulation and improved loop response. The device includes features such as undervoltage lockout (UVLO), current sensing, and a totem-pole output stage capable of driving power MOSFETs directly.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Automatic Feed-Forward Compensation:** Enhances line regulation.  
- **Trimmed Oscillator Discharge Current:** Ensures precise duty cycle control.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs (up to ±1A peak).  
- **Pulse-by-Pulse Current Limiting:** Provides cycle-by-cycle protection.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within specified voltage range.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Low Startup Current:** Typically 0.5mA.  

This information is strictly based on the manufacturer's datasheet for the UC2843BD.

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