PA5711 Datasheet, PDF (1/8 Pages) Protek Devices – High Voltage LED Driver

ANALOG PRODUCTS DIVISION
FEATURES
 11V to 480V Input Voltage Range.
 Over 95% Efficiency.
 Drives from 1 to hundreds of LED’s in Serial and Parallel
combinations.
 Constant LED Drive current.
 Linear or PWM luminance dimming control.
 Light sense and Motion detection inputs to control the
LED’s.
 Resistor Programmable Oscillator Frequency.
 QFN-16 RoHs Compliant Package.
APPLICATIONS
 General Illumination Displays
 Industrial and Decorative LED Lighting.
 Automotive applications.
 DC/DC or AC/DC LED driver applications.
 Constant current source.
 SMPS switching controller.
 LED back lighting.
 Security, Street and Parking garage lighting.
PA5711
High Voltage LED Driver
GENERAL DESCRIPTION
The PA5711 is a High-Efficiency LED driver with multiple
dimming options that include Pulse Width Modulation (PWM),
Linear dimming (LD), Motion Detection (MD) and Light sense
(LS) inputs. PA5711 features a direct gate driver control
through an active high enable pin. It has an internal oscillator
whose frequency can be set externally through a resistor.
The PA5711 in fly-back mode can be used as a current
controlled LED driver (Isolated), driving an LED load at fixed
current from a few mA to over 1.4A.
The PA5711 allows the users to introduce the leading edge
blanking upon their desired delay requirements, also this can
be used to control the Duty cycle of the driver.
The LD pin allows the users to set the threshold beneath the
pre-set 280mV, for smaller duty cycle and reduced dissipation
across the CS resistors.
The PA5711 has a PWM dimming option that through an
externally programmed control signal, with duty ratio 0-100%
and a frequency of a few Kilo-hertz, can control the LED
brightness.
PA5711 BLOCK DIAGRAM
REXT
VDD
280mV
CS
Voltage
Regulator
-
+
+
-
VIN
Oscillator
PWM Controller
Gate
Driver
ROSC
Gate
LD
PWM
ORDERING INFORMATION
Temperature Range Package
-40 to 85 °C
QFN-16
MD
Part Number
PA5711-T7
GND
LS
EN
Figure 1. Block diagram
2929 South Fair Lane, Tempe Tel: [phone]. Fax: [phone]
1
Rev.0. 03/12
www.protekdevices.com
NOT FOR USE IN LIFE SUPPORT SYSTEMS