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UC3845BVD from ON,ON Semiconductor

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15.991ms

UC3845BVD

Manufacturer: ON

High performance current mode controller

Partnumber Manufacturer Quantity Availability
UC3845BVD ON 1000 In Stock

Description and Introduction

High performance current mode controller The UC3845BVD is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Operating Frequency:** Up to 500kHz  
- **Output Drive Current:** ±1A (peak)  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Reference Voltage:** 5V ±1%  
- **Current Sense Comparator:** Adjustable threshold  
- **Under-Voltage Lockout (UVLO):** 8.4V (on) / 7.6V (off)  
- **Package:** SOIC-8  

### **Descriptions:**  
The UC3845BVD is designed for DC-DC converter applications, providing precise control over switching power supplies. It features a trimmed oscillator for accurate duty cycle control, a temperature-compensated reference, and high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Operation:** Improves loop response and simplifies compensation.  
- **Programmable Oscillator:** Allows frequency adjustment with external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Pulse-by-Pulse Current Limiting:** Enhances system reliability.  
- **Low Startup Current:** Typically 0.5mA.  
- **Error Amplifier:** Provides high gain-bandwidth for tight regulation.  

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

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