PRELIMINARY DATA SHEET
D
LND081A/B/C
Up to 277VAC/347VAC/1000VAC True One-Wire
Adjustable Offline Voltage Sources
GENERAL DESCRIPTION
The LND081A/B/C are single wire high voltage
conductor, low cost solutions for deriving from AC offline
voltages a DC output between 2.7V and 100V with mA’s
to 100’s of mA’s of current.
The LND081A are for 28VAC, 48VAC, 120VAC or
277VAC sources and include the input full bridge diodes.
The LND081B is for 347VAC applications and the
LND081C is for up to 1000VAC but require external full
bridge diodes.
The LND081A are packaged in 8 pin EPAD SOIC
packages. LND081B/C are available as bare die.
FEATURES
Adjustable offline voltage source
2.7V to 100V adjustable output voltage
100’s of mA drive capability
Lowest cost solution
LND081A/B include full bridge diodes
Universal Input:
28VAC, 48VAC or 120VAC (A)
Up to 277VAC
(A), 347VAC(B)
Up to 1000VAC (C)
One wire HV conductor eliminates
need for multiple input wires
Resistor programmable output voltage
against a diode threshold
Replaces standard transformer or AC
divider solutions
Lower leakage than MOSFET, IGBT,
BIPOLAR, XFMR or CAP solutions
8 pin EPAD-SOIC Package
Offline uC or PLC voltage supplies
Industrial AC communications loop
derived supplies
Electric grid remote supplies for
monitoring equipment
Emergency lighting, monitoring
equipment, industrial plant supplies
White goods
EQUIVALENT CIRCUIT
APPLICATIONS
Typical Waveforms
No Output Capacitor
120VAC Input – Dark Blue
Output – Light Blue
TYPICAL APPLICATION CIRCUIT
0.1uF, 100V
or Fuse
AC+
2.7 to 100V
VOUT
L
O
A
D
100uF Output Capacitor
85VAC Input – Light Blue
Output 12VDC – Dark Blue
A
C
85- 277VAC
AC-
VREF
GND
Linear Dimensions Semiconductor Inc.
22620 Ricardo Rd, Cupertino CA 95014 USA
tel 312.321.1810
fax 312.321.1830
LINEAR_DIMENSIONS [ LINEAR DIMENSIONS SEMICONDUCTOR ]
