LD7533数据手册Leadtrend中文资料规格书

描述 Description

The LD7533 is an advanced Green Mode PWM controller, which is built-in with frequency triple, multi-protections and EMI-improved solution in a SOT-26/ DIP-8 package.It’s ideal for applications requiring a cost-effective solution, and minimum component counts and circuit space, especially ideal for high power density and small size product.The LD7533 is especially designed for switching power supply with peak power. It incorporates frequency triple function and adjustable OLP timer to handle the peak power with delay time.The frequency triple function can reduce the transformer flux and core size.Furthermore, the frequency swapping function is to reduce the noise level and thus helps the power circuit designers for EMI suppression with minimum amount of component cost and developing time.

特性 Features

·Frequency Triple for peak power (195kHz)
·Very Low Startup Current (<18μA)
·Ultra Low Operating Current at Light Load (<1mA)
·Adjustable OLP (over load protection) delay timer
·Adjustable Soft Start Time
·Current Mode Control with Green Mode Operation
·Out Pin Clamping
·UVLO (Under Voltage Lockout)
·Internal Frequency Swapping for EMI improved
·OVP (Over Voltage Protection) on VCC Pin
·ON-Chip OTP (Over Temperature Protection)
·300mA Driving Capability

应用 Application

·Switching Power Supply with Peak Power
·Printer, Storage Power Supply