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Description

The HW9315B 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 HW9315B integrates a 550V power MOSFET.

With few external components, the LED output

current can be precisely controlled.

The inductor current is sensed during the whole

switching cycle. So it achieves high precision output

current control, and excellent line regulation and load

regulation.

The HW9315B offers rich protection functions to

improve the system reliability, including LED open

circuit protection, LED short circuit protection, VCC

over voltage protection, VCC under voltage

protection, CS resistor open protection, Over

temperature protection function and cycle by cycle

current limit. All the protection functions are

auto-recovery. Ensure that the system is reliable.

Features

Active PFC for High Power Factor and Low

THD

Internal 550V Power MOSFET

System Efficiency up to 95

±3 LED Output Current Accuracy

Excellent Line and Load Regulation

Critical Conduction Mode Operation

LED Short/Open Protection

Current Sensing Resistor Open Protection

Cycle by Cycle Current Limit

VCC Under Voltage Protection

Auto Fault Recovery

Over temperature protection function

Available in SOP-8 Package

Applications

GU10/E27 LED Bulb, Spot Light

PAR30, PAR38 Lamp

T8/T10 LED String

Other LED Lighting