General Description

The LD9162K is an excellent primary-side feedback

controller with QR operation, integrated with a 650V

MOSFET switch in a SOP-8 package. It minimizes the

components counts and is ideal 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 LD9162K includes the

comprehensive protection function, such as Over Load

Protection (OLP), Over Voltage Protection (OVP), and

internal Over Temperature Protection (OTP). Furthermore,

the programmable brown-in/out protection and bulk cap.

OVP protection is built-in.

In most cases, PSR controlled flyback converters would

suffer from bad load regulation performance. To deal with

this problem, dedicated load regulation compensation is also

implemented in LD9162K.

Features

 Primary-Side Feedback Control with Quasi-Resonant

Operation

 Built-in 650V MOSFET Switch

 Built-in Load Regulation Compensation

 Constant Current Control

 Ultra-Low Startup Current (<1.9A)

 80 kHz Maximum Switching Frequency.

 Green Mode Control to enhance Efficiency

 LEB (Leading-Edge Blanking) On CS Pin

 VCC OVP (Over Voltage Protection)

 Adjustable Brown in/out and Bulk_OVP on FB pin.

 Internal OTP (Over Temperature Protection)

 SDSP (Secondary Diode Short Protection)

Applications

 Mobile Phone Charger

 Low Power AC/DC Adaptor