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UC3845NG4 from TEXAS

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UC3845NG4

Manufacturer: TEXAS

Current-Mode PWM Controller 8-PDIP 0 to 70

Partnumber Manufacturer Quantity Availability
UC3845NG4 TEXAS 8 In Stock

Description and Introduction

Current-Mode PWM Controller 8-PDIP 0 to 70 The UC3845NG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments.  

### **Specifications:**  
- **Input Voltage Range:** 8.5V to 30V  
- **Output Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Output Current (Peak):** 1A (sink/source)  
- **Reference Voltage:** 5V ±1%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP, SOIC  

### **Descriptions:**  
The UC3845NG4 is designed for DC-DC converter applications, providing precise control for switching power supplies. It features a fixed-frequency current-mode architecture with cycle-by-cycle current limiting, making it suitable for flyback, forward, and boost converters.  

### **Features:**  
- **Current-Mode Control:** Improves loop response and simplifies compensation.  
- **Under-Voltage Lockout (UVLO):** Ensures proper operation within the specified voltage range.  
- **Programmable Oscillator:** Allows frequency adjustment with an external resistor and capacitor.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Error Amplifier:** Provides high gain-bandwidth for stable feedback loops.  
- **Totem Pole Output:** Optimized for driving power MOSFETs.  

This information is based solely on the manufacturer's datasheet.

Partnumber Manufacturer Quantity Availability
UC3845NG4 28 In Stock

Description and Introduction

Current-Mode PWM Controller 8-PDIP 0 to 70 The UC3845NG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments.  

### **Key Specifications:**  
- **Topology:** Current-mode PWM controller  
- **Input Voltage (VCC):** 8.5V to 30V (operating range)  
- **Output Drive Current:** ±1A (peak)  
- **Switching Frequency:** Up to 500 kHz  
- **Duty Cycle Range:** 0% to 100% (adjustable)  
- **Reference Voltage:** 5V (±1% accuracy)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** 8-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**  
The UC3845NG4 is designed for DC-DC converter applications, providing precise control over power delivery. It features a trimmed oscillator for accurate frequency 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.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable startup and shutdown.  
- **Pulse-by-Pulse Current Limiting:** Enhances system protection.  
- **Internal Soft-Start:** Reduces inrush current during startup.  
- **Low Startup Current:** Typically 0.5mA.  
- **Error Amplifier with High Gain-Bandwidth Product:** Ensures stable feedback control.  

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

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