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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.

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.

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