The LD7537GL is a current mode PWM controller manufactured by Leadtrend Technology. It is designed for power supplies in various applications, providing features for efficient and reliable operation. This controller is commonly used in adapters, chargers, and auxiliary power supplies.

Applications

• AC-DC adapters
• Battery chargers
• Auxiliary power supplies
• Standby power supplies
• Open frame power supplies

Features

• Current mode PWM control
• Low startup current
• Under-voltage lockout (UVLO)
• Over-voltage protection (OVP)
• Over-current protection (OCP)
• Over-temperature protection (OTP)
• Leading edge blanking

Benefits

• High efficiency: Current mode control enables efficient power conversion.
• Reliable operation: Comprehensive protection features prevent damage from faults.
• Low standby power consumption: Low startup current minimizes power waste in standby mode.
• Simplified design: Integrated features reduce the need for external components.
• Cost-effective: Offers a balance of performance and affordability.

Additional Details

The LD7537GL is typically available in a SOT-26 package. It operates with a wide input voltage range and has a fixed operating frequency. The leading-edge blanking feature prevents false triggering due to noise on the current sensing signal. The UVLO ensures that the controller starts up only when the input voltage is sufficient. Consult the Leadtrend datasheet for detailed electrical characteristics, application circuit examples, and component selection guidelines.