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TL494CNG from ON,ON Semiconductor

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TL494CNG

Manufacturer: ON, ON Pb-free

SWITCHMODE TM Pulse Width Modulation Control Circuit

Partnumber Manufacturer Quantity Availability
TL494CNG ON, ON Pb-free 5183 In Stock

Description and Introduction

SWITCHMODE TM Pulse Width Modulation Control Circuit The TL494CNG is a pulse-width modulation (PWM) control IC manufactured by ON Semiconductor.  

### **Specifications:**  
- **Type:** PWM Controller  
- **Topology:** Buck, Boost, Flyback, Forward  
- **Output Configuration:** Push-Pull, Half-Bridge, Full-Bridge  
- **Frequency Range:** Up to 300 kHz  
- **Supply Voltage (VCC):** 7V to 40V  
- **Output Current (Sink/Source):** 200mA (per output)  
- **Duty Cycle Range:** Adjustable (0% to 100%)  
- **Error Amplifier:** Built-in  
- **Dead-Time Control:** Adjustable  
- **Operating Temperature Range:** -40°C to +85°C  
- **Package:** PDIP-16  

### **Descriptions:**  
The TL494CNG is a fixed-frequency PWM controller that provides all necessary features for designing power conversion circuits. It includes an on-chip oscillator, error amplifiers, a dead-time control comparator, and output drivers. It is widely used in switch-mode power supplies (SMPS), DC-DC converters, and motor control applications.  

### **Features:**  
- Adjustable dead-time control  
- Internal oscillator with sync capability  
- Dual error amplifiers for feedback control  
- Output control for push-pull or single-ended operation  
- Under-voltage lockout (UVLO) protection  
- Soft-start capability  

This IC is designed for high-reliability applications and is commonly used in industrial, automotive, and consumer electronics.

Application Scenarios & Design Considerations

SWITCHMODE TM Pulse Width Modulation Control Circuit

Alternative Part Number

  • SG3524N --: Classic PWM controller with similar function and DIP-16 package, widely available and often used as a TL494 substitute in power supply designs.
  • UC3843AN --: Current-mode PWM controller in DIP-8, commonly used in similar switching power supply applications; requires minor circuit adaptation but is a well-known alternative.
  • KA7500B --: Direct functional equivalent of the TL494 PWM controller in DIP-16, pin-compatible and widely used in ATX power supplies.
  • UC3842AN --: Current-mode PWM controller in DIP-8 that can replace TL494 in many offline converter applications, though pinout and topology differ so the circuit must be reviewed.

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