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LT3825EFE from LINEAR

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LT3825EFE

Manufacturer: LINEAR

Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range

Partnumber Manufacturer Quantity Availability
LT3825EFE LINEAR 50 In Stock

Description and Introduction

Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range The LT3825EFE is a switching regulator controller manufactured by Linear Technology (now part of Analog Devices).  

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 60V  
- **Output Voltage:** Adjustable  
- **Switching Frequency:** 50kHz to 250kHz (programmable)  
- **Topology:** Flyback, Forward, or SEPIC  
- **Duty Cycle:** Up to 96%  
- **Operating Temperature Range:** -40°C to 125°C  
- **Package:** 16-Lead TSSOP (Exposed Pad)  

### **Descriptions:**  
The LT3825EFE is a high-performance current-mode PWM controller designed for isolated power supply applications. It provides precise regulation and supports multiple topologies, including flyback, forward, and SEPIC.  

### **Features:**  
- **Wide Input Voltage Range:** Supports 4.5V to 60V input.  
- **Programmable Frequency:** Adjustable from 50kHz to 250kHz.  
- **Current-Mode Control:** Ensures stable operation and fast transient response.  
- **Soft-Start Function:** Reduces inrush current during startup.  
- **Synchronous Rectifier Drive:** Improves efficiency in isolated designs.  
- **High Duty Cycle Operation:** Up to 96% for better efficiency in low-dropout conditions.  
- **Thermally Enhanced Package:** TSSOP-16 with exposed pad for improved heat dissipation.  

This information is based solely on the manufacturer's datasheet and specifications.

Application Scenarios & Design Considerations

Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range
Partnumber Manufacturer Quantity Availability
LT3825EFE LT 1279 In Stock

Description and Introduction

Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range The LT3825EFE is a high voltage, no-opto flyback controller manufactured by Linear Technology (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**  
- **Input Voltage Range:** 4.5V to 100V  
- **Output Voltage:** Adjustable (depends on external components)  
- **Switching Frequency:** 50kHz to 250kHz (programmable)  
- **Maximum Duty Cycle:** 90%  
- **Output Power:** Up to 100W (depending on design)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package:** 16-Lead TSSOP (Exposed Pad)  

### **Descriptions:**  
- The LT3825EFE is a current-mode flyback controller that eliminates the need for an optocoupler by sensing the output voltage directly from the primary-side flyback waveform.  
- It is designed for isolated power supplies, providing accurate regulation without secondary-side feedback.  
- The IC includes features like soft-start, cycle-by-cycle current limiting, and thermal shutdown for robust operation.  

### **Features:**  
- **Primary-Side Sensing:** No optocoupler required for feedback.  
- **Wide Input Voltage Range:** Supports 4.5V to 100V input.  
- **Programmable Frequency:** Adjustable from 50kHz to 250kHz.  
- **Soft-Start:** Reduces inrush current during startup.  
- **Cycle-by-Cycle Current Limiting:** Protects against overloads.  
- **Thermal Shutdown:** Prevents overheating.  
- **Synchronous Rectifier Drive:** Improves efficiency in high-power designs.  
- **Low Quiescent Current:** Enhances efficiency in light-load conditions.  

This information is based solely on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Isolated No-Opto Synchronous Flyback Controller with Wide Input Supply Range

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