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IL494N from INTEGRAL

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IL494N

Manufacturer: INTEGRAL, HYNIX

PWM Control Circuit

Partnumber Manufacturer Quantity Availability
IL494N INTEGRAL, HYNIX 2020 In Stock

Description and Introduction

PWM Control Circuit The IL494N is a pulse-width modulation (PWM) controller IC manufactured by various semiconductor companies, including Texas Instruments (formerly Unitrode). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Type:** PWM Controller IC  
- **Package:** DIP-16 (Dual In-line Package)  
- **Operating Voltage Range:** 7V to 40V  
- **Output Current:** 200mA (per output)  
- **Frequency Range:** Adjustable (typically up to 300kHz)  
- **Duty Cycle Range:** Adjustable (0% to 100%)  
- **Number of Outputs:** 2 (push-pull or single-ended)  
- **Internal Reference Voltage:** 5V (±1%)  
- **Operating Temperature Range:** -40°C to +85°C  

### **Descriptions:**
- The IL494N is a fixed-frequency PWM control circuit designed for switch-mode power supply (SMPS) applications.  
- It includes an on-board oscillator, error amplifiers, a dead-time control comparator, and a flip-flop for pulse steering.  
- The IC provides two output stages (totem-pole or open-emitter/open-collector) for driving power transistors.  

### **Features:**
- **Complete PWM Control:** Includes all necessary functions for SMPS regulation.  
- **Adjustable Dead Time:** Prevents shoot-through in half-bridge or full-bridge configurations.  
- **Internal Error Amplifiers:** Two op-amps for feedback loop control.  
- **Sync Capability:** Allows synchronization with an external clock.  
- **Soft-Start Function:** Controlled via an external capacitor.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation only when the supply voltage is sufficient.  

The IL494N is commonly used in power supplies, inverters, and DC-DC converters. For exact datasheet details, refer to the manufacturer's documentation.

Application Scenarios & Design Considerations

PWM Control Circuit

Alternative Part Number

  • TL494CN --: Industry-standard PWM controller in the same function class as the IL494N, widely available and pin-compatible in most DIP-16 designs.
  • KA7500B --: Direct functional equivalent PWM controller commonly used as a drop-in replacement for 494-series devices in power supply circuits.
  • SG3524N --: Similar regulating PWM controller with comparable DIP-16 pinout and drive capability, suitable for many 494-type applications.

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