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UC3844NG4 from TEXAS

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UC3844NG4

Manufacturer: TEXAS

Current-Mode PWM Controller 8-PDIP 0 to 70

Partnumber Manufacturer Quantity Availability
UC3844NG4 TEXAS 2 In Stock

Description and Introduction

Current-Mode PWM Controller 8-PDIP 0 to 70 The UC3844NG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments (TEXAS). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:

### **Specifications:**
- **Manufacturer:** Texas Instruments (TEXAS)  
- **Part Number:** UC3844NG4  
- **Type:** Current-Mode PWM Controller  
- **Topology:** Flyback, Forward, Boost, Buck  
- **Operating Frequency:** Up to 500 kHz  
- **Output Drive Current:** 1A (Peak)  
- **Supply Voltage (Vcc):** 8.5V to 30V  
- **Duty Cycle Range:** 0% to 50%  
- **Reference Voltage:** 5V ±1%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** PDIP-8 (Plastic Dual In-Line Package)  

### **Descriptions:**
- The UC3844NG4 is a fixed-frequency pulse-width modulation (PWM) controller designed for DC-DC converter applications.  
- It incorporates a trimmed oscillator, temperature-compensated reference, high-gain error amplifier, and a current-sensing comparator.  
- The device features a latch for single-pulse metering and a totem-pole output stage for driving power MOSFETs.  
- It is optimized for offline and DC-DC converter applications with minimal external components.  

### **Features:**
- **Current-Mode Operation:** Provides inherent line feedforward, cycle-by-cycle current limiting, and simplified feedback loop compensation.  
- **Automatic Feedforward Compensation:** Ensures consistent response over varying input voltages.  
- **Under-Voltage Lockout (UVLO):** Ensures proper startup with hysteresis for reliable operation.  
- **Trimmed Oscillator:** Provides precise frequency control with external timing components.  
- **High-Current Totem-Pole Output:** Capable of directly driving a power MOSFET.  
- **Low Startup and Operating Current:** Reduces power consumption.  
- **Internal Bandgap Reference:** Delivers a stable 5V reference for feedback control.  

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

Application Scenarios & Design Considerations

Current-Mode PWM Controller 8-PDIP 0 to 70
Partnumber Manufacturer Quantity Availability
UC3844NG4 UC 58 In Stock

Description and Introduction

Current-Mode PWM Controller 8-PDIP 0 to 70 The UC3844NG4 is a high-performance current-mode PWM controller manufactured by Texas Instruments. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Input Voltage (VCC):** 8.5V to 30V  
- **Output Current (Gate Drive):** 1A (peak)  
- **Switching Frequency:** Up to 500kHz  
- **Duty Cycle Range:** 0% to 50% (adjustable)  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package Type:** PDIP-8, SOIC-8  

### **Descriptions:**
- The UC3844NG4 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 improved loop response and simplified compensation.  
- Includes an under-voltage lockout (UVLO) feature to ensure proper startup and shutdown.  

### **Features:**
- **Current-Mode Control:** Enhances transient response and simplifies feedback loop design.  
- **Adjustable Oscillator Frequency:** Allows customization for different applications.  
- **Under-Voltage Lockout (UVLO):** Ensures reliable operation by preventing startup below the minimum voltage threshold.  
- **Soft-Start Capability:** Reduces inrush current during startup.  
- **Error Amplifier with Reference:** Provides precise voltage regulation.  
- **Latch-Free Operation:** Allows immediate restart after fault conditions.  
- **High-Current Totem Pole Output:** Directly drives power MOSFETs.  

This information is based solely on the manufacturer's datasheet for the UC3844NG4.

Application Scenarios & Design Considerations

Current-Mode PWM Controller 8-PDIP 0 to 70

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