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UC494AJ from SG

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UC494AJ

Manufacturer: SG

ADVANCED REGULATING PULSE WIDTH MODULATORS

Partnumber Manufacturer Quantity Availability
UC494AJ SG 304 In Stock

Description and Introduction

ADVANCED REGULATING PULSE WIDTH MODULATORS The UC494AJ is a pulse-width modulation (PWM) controller IC manufactured by SG (Silicon General). Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** Silicon General (SG)  
- **Part Number:** UC494AJ  
- **Type:** PWM Controller IC  
- **Package:** 16-pin DIP (Dual In-line Package)  
- **Operating Voltage:** 7V to 40V  
- **Output Current:** 200mA (sink/source per output)  
- **Frequency Range:** Adjustable (typically up to 300kHz)  
- **Duty Cycle:** Adjustable (0% to 100%)  
- **Temperature Range:** -25°C to +85°C (commercial grade)  

### **Descriptions:**  
The UC494AJ is a fixed-frequency PWM controller designed for power supply regulation. It provides push-pull or single-ended output control, making it suitable for DC-DC converters, inverters, and SMPS (Switched-Mode Power Supplies). The IC includes an on-board oscillator, error amplifiers, a dead-time control comparator, and a flip-flop for pulse steering.

### **Features:**  
- **Adjustable Dead-Time Control:** Prevents shoot-through in push-pull configurations.  
- **On-Chip Oscillator:** Allows frequency programming via external resistors and capacitors.  
- **Dual Error Amplifiers:** Supports voltage and current feedback loops.  
- **Soft-Start Capability:** Controlled via an external capacitor.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation above 7V.  
- **Internal Reference Voltage:** 5V (±1%) for stable regulation.  
- **Output Configuration:** Compatible with totem-pole or open-collector drivers.  

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

Application Scenarios & Design Considerations

ADVANCED REGULATING PULSE WIDTH MODULATORS
Partnumber Manufacturer Quantity Availability
UC494AJ UC 400 In Stock

Description and Introduction

ADVANCED REGULATING PULSE WIDTH MODULATORS The UC494AJ is a pulse-width modulation (PWM) controller IC manufactured by Texas Instruments. Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Texas Instruments  
- **Type:** PWM Controller IC  
- **Package:** 16-Pin DIP (Dual In-line Package)  
- **Operating Voltage Range:** 7V to 40V  
- **Output Current:** 200mA (sink/source per output)  
- **Frequency Range:** Up to 300kHz  
- **Duty Cycle Range:** Adjustable from 0% to 100%  
- **Temperature Range:**  
  - **Operating:** 0°C to 70°C  
  - **Storage:** -65°C to 150°C  

### **Descriptions:**
- The UC494AJ is a fixed-frequency PWM controller designed for power supply control applications.  
- It includes an on-board oscillator, error amplifiers, a dead-time control comparator, and output drivers.  
- It is commonly used in switch-mode power supplies (SMPS), inverters, and DC-DC converters.  

### **Features:**
- **Complete PWM Control Circuitry**  
- **Adjustable Dead-Time Control**  
- **On-Chip Error Amplifiers**  
- **Internal Oscillator with Synchronization Capability**  
- **Soft-Start Functionality**  
- **Under-Voltage Lockout (UVLO) Protection**  
- **Push-Pull or Single-Ended Output Configuration**  
- **High Output Drive Current (200mA per output)**  

This IC is widely used in industrial and consumer electronics for efficient power management.

Application Scenarios & Design Considerations

ADVANCED REGULATING PULSE WIDTH MODULATORS

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