Description

The JH5553B（LP/H）is a high precision non-isolated

buck driver with active PFC, specially designed for

universal input offline constant current LED lighting.

The driver with on-chip PFC circuit achieves high

power factor and low THD. Operating in critical

conduction mode, the power MOSFET switching loss

is reduced and the inductor is fully utilized.

The JH5553B（LP/H） integrates a 650V power

MOSFET. With few external components, the LED

output current can be precisely controlled.

The JH5553B（LP/H） remove the VCC

capacitor,COMP capacitor and RCS resistor to simplify

the external BOM. And it utilizes patented current

detection,with few external components,it achieves

high precision output current,excellent line

regulation and load regulation.

The JH5553B（LP/H） are built-in JFET start-up and

IC power supply circuit, which enable the system to

quickly start, and reduce the external power supply

components, achieve smaller volume.

The JH5553B（LP/H）offers rich protection functions

to improve the system reliability, including LED load

short protection.The system reliability is further

improved by the thermal regulation function.The

output current is reduced when the driver is in

condition of over temperature.

Adopts SOP-7 /DIP-8 package.

Features

 Active-PFC for High PF and Low THD.

 No VCC and COMP capacitor.

 Integrated current sense resister.

 Critical Conduction Mode Operation.

 LED Short Protection.

 Cycle by Cycle Current Limit.

 Thermal Regulation Function.

 Adopts SOP-7 / DIP-8 package.

Applications

 LED Bulb

 LED tube

 Other LED Light