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UCC3803N

Low-Power BiCMOS Current-Mode PWM

Partnumber Manufacturer Quantity Availability
UCC3803N 21 In Stock

Description and Introduction

Low-Power BiCMOS Current-Mode PWM The UCC3803N is a high-performance current-mode PWM controller manufactured by Texas Instruments. Here are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 8.5V to 12V (operating), 7.6V (UVLO turn-on), 6.8V (UVLO turn-off)  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 1MHz  
- **Duty Cycle Range:** 0% to 100%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  

### **Description:**  
The UCC3803N is a fixed-frequency, current-mode PWM controller optimized for offline and DC-DC power supplies. It provides precise control for power conversion applications, featuring high-speed performance and low power consumption.  

### **Key Features:**  
- **Current-Mode Control:** Enhances loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows external timing resistor/capacitor for frequency adjustment.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation within voltage limits.  
- **Internal Leading-Edge Blanking:** Improves noise immunity in current sensing.  
- **High-Current Totem-Pole Output:** Directly drives power MOSFETs.  
- **Low Startup Current:** Typically 150µA for reduced standby power.  

This device is commonly used in switch-mode power supplies (SMPS), battery chargers, and other power management applications.  

(Source: Texas Instruments Datasheet)

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