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