مدار مجتمع (آی سی) آی‌سی مدیریت توان (پی‌ام‌آی‌سی) مبدل ای‌سی به دی‌سی (سوییچینگ آفلاین)

Product Attributes

Introduction

The LD7515A is an excellent primary side feedback BJT controller with CV/CC operation, integrated with several functions of protections. It minimizes the component counts and is available in a tiny SOT-26 package. Those make it an ideal design for low cost applications. It provides functions of ultra-low startup current, green-mode power-saving operation and leading-edge blanking of the current sensing. Also, the LD7515A features Internal OTP (Over Temperature Protection) and OVP (Over Voltage Protection) to prevent the circuit from being damaged due to abnormal conditions. In most cases, the power supply with primary-side feedback controller would accompany with some serious load regulation effect. To deal with this problem, the LD7515A consists of dedicated load regulation compensation circuit to enhance its performance.

Features

• Primary-Side Feedback Control with Quasi-Resonant Operation
• Direct Drive of BJT Switch
• Constant Voltage within ±5%
• Built-In Adjustable Load Regulation Compensation
• Constant Current Control
• Ultra-Low Startup Current (<1.9μA)
• 0.5mA Low Operating Current at Light Load
• 75 kHz Maximum Switching Frequency.
• Current Mode Control
• Green Mode Control Improve Efficiency
• LEB (Leading-Edge Blanking) on CS Pin
• Built-in Soft Start
• VCC OVP (Over Voltage Protection)
• FB Pin Open/Short Protection
• Internal OTP (Over Temperature Protection)

Applications

• Mobile Phone Charger
• Lower Power AC/DC Adapter