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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.

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.

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