PRELIMINARY DATA SHEET
LND080A/B
85-347VAC True One-Wire
Offline Emergency Light Driver
GENERAL DESCRIPTION
The LND080A/B are single wire HV
conductor, low cost, solutions for AC
offline emergency lighting. The LN080 is
capable of operating from 120V, 277V, or
347V without requiring the user to utilize
different input wires.
This reduces
returns typical in the emergency lighting
market.
The LND080 includes the offline full
bridge diodes, battery charger logic, and
two resistor programmed current sources
which can provides up to 100mA of
output each.
The LND080A is targeted at exit signs
and the LND080B for emergency lights.
A switch driver and debounce circuitry
allow regulatory tests.
The LND080 are packaged in 10 pin
EPAD SOIC packages.
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FEATURES
Offline emergency light interface
Lowest cost solution
Includes full bridge diodes
Universal 85VAC-347VAC Input
Single wire HV conductor eliminates
need for separate HV input wires
On board battery charger
Two on board resistor programmed
current sources up to 100mA
Switch driver current source with on
board debounce
LND080A for use with normally on LED
strings (exit signs). Button removes AC
to test battery connection.
LND080B for use with normally off LED
strings (emergency lights).
Button
removes AC and engages LEDs.
LND080B autodetects loss of AC input
and engages LED strings
Replaces standard transformer or AC
divider solutions
10 pin EPAD-SOIC Package
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APPLICATIONS
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Exit Signs
Emergency Lights
Battery Backed-up Lanterns
AC Charging LED Flashlights
AC Charging Helmet Lamps
TYPICAL APPLICATION CIRCUIT
VBAT
0.1uF, 100V
or Fuse
AC+
AC-
LED1+
A
C
LED2+
Cs1+
Cs2+
ISRC
GND
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Linear Dimensions Semiconductor Inc.
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22620 Ricardo Rd, Cupertino CA 95014 USA
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tel 312.321.1810
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fax 312.321.1830
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www.lineardimensions.com
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LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
