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UC3844NG from ON Pb-free,ON Semiconductor

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UC3844NG

Manufacturer: ON Pb-free

High Performance Current Mode Controllers

Partnumber Manufacturer Quantity Availability
UC3844NG ON Pb-free 7226 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC3844NG is a high-performance current-mode PWM controller manufactured by ON Semiconductor. Below are the factual details about its specifications, descriptions, and features:

### **Specifications:**  
- **Manufacturer:** ON Semiconductor  
- **Part Number:** UC3844NG  
- **Package:** PDIP-8 (Plastic Dual In-Line Package)  
- **RoHS Compliance:** Pb-Free (Lead-Free)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Input Voltage (VCC):** 8.5V to 30V  
- **Output Voltage:** Adjustable via external components  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle:** 0% to 50% (adjustable)  
- **Output Current (Peak):** 1A (sink/source)  

### **Descriptions:**  
The UC3844NG is a fixed-frequency pulse-width modulation (PWM) controller optimized for DC-DC converter and offline power supply applications. It operates in current-mode control, providing precise regulation and improved transient response. The device includes features such as under-voltage lockout (UVLO), cycle-by-cycle current limiting, and a totem-pole output stage for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control:** Ensures simplified loop compensation and inherent line feedforward.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable startup and shutdown.  
- **Adjustable Oscillator Frequency:** Set via external resistor and capacitor.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Totem-Pole Output:** Capable of driving MOSFETs directly.  
- **Low Startup Current:** Typically 0.5mA for efficient operation.  
- **Pb-Free (Lead-Free) Construction:** Compliant with environmental regulations.  

This information is based on the manufacturer's datasheet and specifications.

Application Scenarios & Design Considerations

High Performance Current Mode Controllers
Partnumber Manufacturer Quantity Availability
UC3844NG ON 747 In Stock

Description and Introduction

High Performance Current Mode Controllers The UC3844NG is a high-performance current-mode PWM controller manufactured by ON Semiconductor.  

### **Specifications:**  
- **Input Voltage (VCC):** 8V to 30V  
- **Output Current (Source/Sink):** 1A (Peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Reference Voltage:** 5V (with ±1% tolerance)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** PDIP-8 (Plastic Dual In-Line Package)  

### **Descriptions:**  
The UC3844NG is a fixed-frequency pulse-width modulation (PWM) controller optimized for DC-DC converter and power supply applications. It features current-mode control for improved transient response and cycle-by-cycle current limiting. The device includes an onboard oscillator, error amplifier, and a high-current totem-pole output for driving power MOSFETs.  

### **Features:**  
- **Current-Mode Control:** Enhances line and load regulation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup with hysteresis.  
- **Programmable Oscillator:** Allows frequency adjustment via external components.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Error Amplifier:** Provides precise voltage regulation.  
- **Pulse-by-Pulse Current Limiting:** Protects against overloads.  
- **Latching PWM:** Prevents multiple pulses in a single cycle.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

High Performance Current Mode Controllers

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