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IL494D from AUK

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IL494D

Manufacturer: AUK, TOSHIBA

PWM Control Circuit

Partnumber Manufacturer Quantity Availability
IL494D AUK, TOSHIBA 19544 In Stock

Description and Introduction

PWM Control Circuit The IL494D is a pulse-width modulation (PWM) control circuit manufactured by various semiconductor companies, including Texas Instruments (TI) and other vendors. Below are the factual specifications, descriptions, and features based on available data:

### **Specifications:**  
- **Type:** PWM Controller IC  
- **Topology:** Push-Pull, Half-Bridge, or Full-Bridge Configurations  
- **Operating Voltage Range:** 7V to 40V  
- **Output Current:** Up to 500mA (sink/source per output)  
- **Frequency Range:** Adjustable (typically up to 300kHz)  
- **Duty Cycle:** Adjustable (0% to 100%)  
- **Number of Outputs:** 2 (totem-pole outputs)  
- **Internal Oscillator:** Yes (frequency adjustable via external RC components)  
- **Error Amplifiers:** 2 (for voltage and current feedback control)  
- **Reference Voltage:** 5V (±1% accuracy)  
- **Package:** PDIP-16 (Plastic Dual In-Line Package)  

### **Descriptions:**  
- The IL494D is a fixed-frequency PWM controller IC designed for switch-mode power supply (SMPS) applications.  
- It includes two error amplifiers, an on-chip adjustable oscillator, a dead-time control comparator, and a flip-flop for pulse steering.  
- The device is widely used in DC-DC converters, inverters, and motor control circuits.  

### **Features:**  
- Adjustable dead-time control for output stages.  
- Undervoltage lockout (UVLO) for reliable operation.  
- Built-in 5V reference voltage with high accuracy.  
- Compatible with both voltage-mode and current-mode control.  
- Internal circuitry prevents double-pulsing in push-pull configurations.  
- Can be synchronized with an external clock signal.  

For exact details, refer to the manufacturer's datasheet, as specifications may vary slightly between vendors.

Application Scenarios & Design Considerations

PWM Control Circuit

Alternative Part Number

  • TL494CN --: Industry-standard PWM controller with the same function and pinout as the IL494D; widely available and well documented.
  • KA7500B --: Direct functional equivalent to the 494-series PWM controller, commonly used as a drop-in replacement in power supply designs.
  • SG3524N --: Similar regulating PWM controller IC suitable for switching power supply applications, though pinout differs slightly and should be verified.
  • TL494CD --: Industry-standard PWM controller with the same function and pinout as the IL494, widely available and well documented.

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