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SG3525

PULSE WIDTH MODULATOR CONTROL CIRCUITS

Partnumber Manufacturer Quantity Availability
SG3525 1000 In Stock

Description and Introduction

PULSE WIDTH MODULATOR CONTROL CIRCUITS The SG3525 is a pulse width modulation (PWM) controller IC manufactured by various semiconductor companies, including Texas Instruments, ON Semiconductor, and STMicroelectronics. Below are its key specifications, descriptions, and features:

### **Specifications:**
1. **Supply Voltage:** 8V to 35V  
2. **Output Current:** 100mA (sink/source per channel)  
3. **Oscillator Frequency Range:** 100Hz to 500kHz (adjustable via external resistor and capacitor)  
4. **Duty Cycle Range:** 0% to 49% (adjustable)  
5. **Reference Voltage Output:** 5.1V (±1%)  
6. **Operating Temperature Range:** -40°C to +85°C  
7. **Package Types:** DIP-16, SOIC-16  

### **Descriptions:**
- The SG3525 is a fixed-frequency PWM controller designed for switching power supply applications.  
- It includes an on-chip oscillator, error amplifier, PWM comparator, and soft-start circuitry.  
- The device is commonly used in DC-DC converters, inverters, and motor control circuits.  

### **Features:**
1. **Adjustable Dead-Time Control:** Allows precise control of the dead time between complementary outputs.  
2. **Soft-Start Function:** Prevents high inrush current during startup.  
3. **Synchronization Capability:** Multiple SG3525 ICs can be synchronized using an external clock.  
4. **Error Amplifier:** Provides feedback loop stability for voltage regulation.  
5. **Dual Output Drivers:** Push-pull or single-ended output configurations.  
6. **Undervoltage Lockout (UVLO):** Ensures proper operation only when the supply voltage is within the specified range.  
7. **Shutdown Pin:** Allows immediate disabling of outputs for protection.  

The SG3525 is widely used in power electronics due to its reliability and ease of implementation in various PWM-based applications.

Application Scenarios & Design Considerations

PULSE WIDTH MODULATOR CONTROL CIRCUITS

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