特性 Features

High-Voltage CMOS Process with Excellent ESD

protection

Very Low Startup Current (<1.5?A)

Current Mode Control

Green Mode Control

UVLO (Under Voltage Lockout)

LEB (Leading-Edge Blanking) on CS Pin

Internal Frequency Swapping

Internal Slope Compensation

OVP (Over Voltage Protection) on Vcc Pin

Brownout Protection

OLP (Over Load Protection)

300mA/-500mA Driving Capability

Grouping Frequency Limitation for Audio Noise

Applications

? LCD Monitor/TV Power

? Switching AC/DC Adaptor

? Open Frame Switching Power Supply

General Description

The LD5532 is built with several functions, audio noise

prevention, protection and EMI-improved solution in a tiny

package. It takes less components counts or circuit space,

especially ideal for those total solutions of low cost.

It includes low startup current, green-mode power-saving

operation, leading-edge blanking of the current sense and

internal slope compensation. It also features protections

of OLP (Over Load Protection) and OVP (Over Voltage

Protection) to prevent circuit from damage under

abnormal conditions.

Furthermore, the Frequency Swapping function is also

built-in to reduce the noise level and thus helps the power

circuit designers to easily deal with the EMI filter design by

spending minimum amount of component cost and

developing time.