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UC3842BNG from ON,ON Semiconductor

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UC3842BNG

Manufacturer: ON

High Performance Current Mode Controllers

Partnumber Manufacturer Quantity Availability
UC3842BNG ON 230 In Stock

Description and Introduction

High Performance Current Mode Controllers The **UC3842BNG** is a high-performance current-mode PWM controller manufactured by **ON Semiconductor**.  

### **Specifications:**  
- **Topology**: Current-mode PWM controller  
- **Input Voltage (VCC)**: 8V to 30V (start-up typically 16V, UVLO turn-off typically 10V)  
- **Output Drive Current**: ±1A (peak)  
- **Switching Frequency**: Up to 500kHz (adjustable with external components)  
- **Duty Cycle**: 0% to 100% (adjustable)  
- **Reference Voltage**: 5V (±1% tolerance)  
- **Operating Temperature Range**: -40°C to +85°C  
- **Package**: 8-Pin DIP (PDIP) or SOIC  

### **Descriptions & Features:**  
- **Current-Mode Control**: Provides cycle-by-cycle current limiting for improved transient response.  
- **Under-Voltage Lockout (UVLO)**: Ensures proper start-up and shutdown.  
- **Precision Reference**: Internal 5V bandgap reference with tight tolerance.  
- **Adjustable Oscillator**: Frequency set by external resistor and capacitor.  
- **Error Amplifier**: High-gain op-amp for feedback loop control.  
- **Soft-Start Capability**: Reduces inrush current during start-up.  
- **Pulse-by-Pulse Current Limiting**: Enhances system reliability.  
- **Low Start-Up Current**: Typically <1mA.  
- **Totem-Pole Output**: Optimized for driving power MOSFETs.  

The **UC3842BNG** is widely used in **switch-mode power supplies (SMPS), DC-DC converters, and offline power supplies** due to its robustness and flexibility.

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