BW7381 Datasheet, PDF (1/11 Pages) Bruckewell Technology LTD – Universal High Brightness LED Driver

BW7381
Universal High Brightness LED Driver
FEATURES
DESCRIPTION
z Universal Rectified 90VAC to 264VAC Input
Voltage Range
z Built-in Active Power Factor Correction
Technique
z Low THD, meet with IEC-61000-3-2 Class-C
z High Efficiency Application
z Built-in Output Short Circuit Protection with
Auto-Recovery
z Built-in Output Over Voltage Protection with
Auto-Recovery
z Built-in Gate Clamp
z Cycle-by-cycle Current Limit
z Fail-Safe, Output is not subjected to line
voltage if the MOSFET fails.
z Excellently Accurate Constant Current
z Very Tight Line and Load Regulation
z Constant Off-Time
z Buck or Buck-Boost Configuration
APPLICATIONS
The BW7381 is a controller for off-line LED converter.
The BW7381 operate with constant off-time, peak
current mode control with active power factor
correction function. The controller senses real-time
switch current to cycle-by-cycle current limit.
Cycle-by-cycle current limit at the CS pin ensure a
safe operation during short-circuit at the output. It
can be configured in either buck-boost (Figure1)
or buck (Figure2) application circuit. The driver
output voltage is limited to 19V to protect external
power MOSFET. The controller also monitors
integrated actual LED current to perform the
excellent line and load regulation. The controller
makes the inductor current to follow the shape of
input voltage to perform high power factor and low
THD solution.
The BW7381 provides complete protection
features such as short-circuit and open-circuit
protection.
z AC/DC LED Driver Application
z DC/DC LED Driver Application
z Signage and Decorative LED Lighting
z Residential Lighting
ORDER INFORMATION
PIN CONFIGURATIONS (TOP VIEW)
BW 7381- S8 R
Bruckewell
Circuit Type
Shipping:
R: Tape & Reel
S8: SOP-8
Rev.1.4 Jan. 2013Ä¡