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KA3525A from FAIRCHILD,Fairchild Semiconductor

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KA3525A

Manufacturer: FAIRCHILD

SMPS Controller

Partnumber Manufacturer Quantity Availability
KA3525A FAIRCHILD 25 In Stock

Description and Introduction

SMPS Controller The KA3525A is a pulse width modulation (PWM) control circuit manufactured by FAIRCHILD. Below are its specifications, descriptions, and features:

### **Specifications:**  
- **Supply Voltage (VCC):** 8V to 35V  
- **Output Current (Sink/Source):** 100mA (per output)  
- **Oscillator Frequency Range:** 100Hz to 500kHz  
- **Duty Cycle Range:** 0% to 100%  
- **Error Amplifier Input Voltage Range:** -0.3V to VCC - 2V  
- **Operating Temperature Range:** -20°C to +85°C  
- **Package Type:** DIP-16, SOIC-16  

### **Descriptions:**  
- The KA3525A is a fixed-frequency PWM controller designed for switch-mode power supply applications.  
- It includes an on-chip oscillator, error amplifier, PWM comparator, flip-flop, and output control circuits.  
- Features a shutdown pin for immediate output disable and soft-start capability.  
- Suitable for push-pull, half-bridge, and full-bridge converter topologies.  

### **Features:**  
- **Complete PWM Control:** Includes error amplifier, PWM comparator, and adjustable dead-time control.  
- **Synchronizable Oscillator:** Allows synchronization with external clock signals.  
- **Soft-Start Function:** Gradually increases duty cycle to prevent inrush current.  
- **Undervoltage Lockout (UVLO):** Ensures proper operation only when supply voltage is sufficient.  
- **Dual Alternating Outputs:** Provides two totem-pole outputs for driving power transistors.  
- **Adjustable Dead Time:** Prevents shoot-through in bridge configurations.  

This information is based on FAIRCHILD's datasheet for the KA3525A.

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