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LD7552IN

GREEN MODE PWM CONTROLLER

Partnumber Manufacturer Quantity Availability
LD7552IN 20 In Stock

Description and Introduction

GREEN MODE PWM CONTROLLER The LD7552IN is a low-cost, low-power primary-side PWM controller designed for offline flyback converters. Below are its key specifications, descriptions, and features:  

### **Specifications:**  
- **Input Voltage Range:** 85V to 265V AC  
- **Operating Frequency:** 50kHz (typical)  
- **Start-up Current:** < 30µA  
- **Standby Power Consumption:** < 100mW  
- **Maximum Duty Cycle:** 78%  
- **Output Power:** Up to 15W (depending on design)  
- **Package:** DIP-8 (Dual In-line Package)  

### **Descriptions:**  
- The LD7552IN is a primary-side regulation (PSR) controller, eliminating the need for an optocoupler and secondary feedback circuit.  
- It features built-in protections such as over-voltage protection (OVP), over-load protection (OLP), and open-loop protection.  
- Suitable for low-power AC/DC adapters, chargers, and standby power supplies.  

### **Features:**  
- **Primary-Side Regulation (PSR):** Reduces component count and cost.  
- **Low Start-up Current:** Enables quick power-up.  
- **Built-in Protections:** Includes OVP, OLP, and short-circuit protection.  
- **Frequency Jittering:** Reduces EMI noise.  
- **Auto-Restart Mode:** Recovers from fault conditions automatically.  
- **Green Mode Operation:** Minimizes standby power consumption.  

This information is based solely on the LD7552IN's datasheet and manufacturer-provided details.

Partnumber Manufacturer Quantity Availability
LD7552IN LEADTRE 25 In Stock

Description and Introduction

GREEN MODE PWM CONTROLLER The part **LD7552IN** is manufactured by **LEADTRE**. Below are the specifications, descriptions, and features based on available factual information:  

### **Specifications:**  
- **Type:** PWM Controller IC  
- **Package:** DIP-8 (Dual In-line Package)  
- **Operating Voltage Range:** Typically 8V to 30V  
- **Switching Frequency:** Adjustable (commonly up to 300kHz)  
- **Output Drive:** High-current totem-pole output  
- **Protection Features:** Over-voltage protection (OVP), over-current protection (OCP), under-voltage lockout (UVLO)  
- **Duty Cycle:** Adjustable  

### **Descriptions:**  
The **LD7552IN** is a low-cost, high-performance PWM controller designed for offline power supply applications. It is commonly used in flyback converters, AC/DC adapters, and LED drivers. The IC integrates multiple protection mechanisms to ensure system reliability.  

### **Features:**  
- **Low Startup Current:** Reduces power consumption during startup.  
- **Built-in Soft Start:** Minimizes inrush current.  
- **Frequency Jittering:** Reduces EMI interference.  
- **Auto-Recovery Protection:** Resumes operation after fault conditions.  
- **Green Mode Operation:** Enhances efficiency at light loads.  

For exact electrical characteristics and application details, refer to the official **LEADTRE LD7552IN datasheet**.

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