ENHANCED FLOATING HOT DECK
LOW-VOLTAGE POWER SUPPLIES WITH
ISOLATED DIGITAL AND ANALOG I/O
ULTRAVOLT® EFL SERIES
Enhanced
floating
hot deck low-
voltage power
supplies
The EFL
series
of floating hot deck, low-voltage (LV)
power supplies offers an integrated solution for systems
requiring LV power and controls with high voltage
isolation.
Combining a highly isolated, DC-to-DC, multi-
output low-voltage power supply (LVPS) with an advanced
isolated digital and analog I/O topology, the EFL sub-
system provides both power and controls to floating-hot-
deck circuitry. This solution, when combined with one or
more UltraVolt® HVPS or other circuitry, can provide high-
performance solutions for a variety of applications.
Features
› Precision analog control
› Linearity of ±0.05%
and accuracy of ±0.2%
› 10ppm temperature coe
cient
› Isolated up to 15 kV or 30 kV
› Isolation resistance of 150 G
(15 kV) or 2 G (30 kV)
› 4 regulated floating LV power
outputs
› Isolated digital and analog I/O
to and from floating hot deck
Typical Applications
› Floating/stacked ion or
e-beam biases
› Floating filament bias
› Floating pulsers and gated
grids
› Floating capacitance meters
› Floating high side current
monitors
› Floating leakage testers
NORMAL, HALF-QUIET, AND QUIET MODES
All EFLs feature a mode control. Three different
models—normal, half-quiet, and quiet—are
selectable via the voltage level at the mode pin.
A voltage between -1.0 and +0.8 V keeps the unit
in normal mode; the up and down analog channels
follow their inputs. If the mode feature is not used,
the mode pin must be grounded for the EFL
to operate properly.
A voltage more negative than -4.00 V places the
EFL in half-quiet mode. The up channels do not
respond to changes in their inputs in half-quiet
mode.
A voltage greater than +3.75 V and less than
+5.0 V places the EFL in quiet mode. In quiet
mode, the up and down channels do not respond
to changes in their inputs.
The voltage level at the mode pin must not exceed
+5.0 V at any time. Please contact Advanced
Energy® for an analysis of your requirements.
Note: If a voltage > 0.8 V is applied to the mode pin, it must source less
than 400
μA.
PARAMETER
Input Power
CONDITIONS
Full Power
Standby (Disabled)
No Load
Max Load
Nominal Input, Full
Load
MODELS
12 W
+12 ±5%
< 150
< 0.50
< 2.50
< 50
UNITS
24 W
+24 ±10%
< 100
< 0.50
< 2.30
< 50
36 W (15 kV only)
+24 ±10%
< 100
< 0.50
< 3.00
< 50
VDC
mA
A
A
mA pk to pk
Voltage Range
Current
Current
Current
AC Ripple Current
Local Controls: Reference
All Types
+5.1 ±2%
464 ±1%
0.4
VDC
Output Voltage
Output Impedance
Stability
T = +25°C, Initial Value
T = +25°C
Over Full Temperature
Range
Ω
mV/°C
Local Controls: LVPS Enable/Disable
All Types
+3.2 to 5
VDC
Power Supply On
Power Supply Off
Input/Output Isolation
Open, or a Voltage
Above TTL High
(Isource < 400
μ
A)
Grounded, or a Voltage
Below TTL Low
< 0.8 (Isink 1 mA min)
VDC
15EFL
Continuous
All Inputs to All Outputs
All Inputs to All Outputs
15
150
< 40 std, < 50 “-E”
30EFL
30
2
< 40 std
kV
G
Ω
pF
Isolation Voltage
Isolation
Resistance
Leakage
Capacitance
PARAMETER
Output #1 Power
Output #1 Voltage
Output #1 Current
Output #1 Line
Regulation
Output #1 Load
Regulation
Output #1 Ripple
Output #2 and #4
Voltage
Output #2 and #4
Current
Output #2 and #4
Line Regulation
Output #2 and #4
Load Regulation
Output #2 and #4
Ripple
Output #3 Voltage
Output #3 Current
Output #3 Line
Regulation
Output #3 Load
Regulation
Output #3 Ripple
Local Input
Isolated Output
Baud Rate
Local Input
Voltage
Isolated Output
Voltage
Initial Offset Error
Gain Error
Linearity Error
Stability
Temperature
Coefficient
Bandwidth
CONDITIONS
Nominal Input, Max Iout
Nominal Input Voltage
Range
Min to Max
Nominal Input Range,
Full Load
No Load to Full Load
Full Load
Nominal Input Voltage
Range
Min to Max
Nominal Input Range,
Full Load
No Load to Full Load
Full Load
Nominal Input Voltage
Range
Min to Max
Nominal Input Range,
Full Load
No Load to Full Load
Full Load
MODELS
12 W
12
+12 ±2%
0 to 1
< 0.1%
< 0.25%
< 2.5%
±15 ±5%
0 to 50
< 0.3%
< 5%
< 2.5%
+5.1 ±1%
500
< 1%
< 1%
< 4%
UNITS
24 W
24
+24 ±2%
0 to 1
< 0.1%
< 0.30%
< 1.5%
±15 ±5%
0 to 50
< 0.3%
< 1%
< 2.5%
+5.1 ±1%
500
< 1%
< 1%
< 4%
Isolated Power Outputs
36 W (15 kV only)
36
+24 ±2%
0 to 1.5
< 0.1%
< 0.40%
< 1.5%
±15 ±5%
0 to 50
< 0.3%
< 1%
< 2.5%
+5.1 ±1%
500
< 1%
< 1%
< 4%
W
VDC
A
VDC
VDC
V pk to pk
VDC
mA
VDC
VDC
V pk to pk
VDC
mA
VDC
VDC
V pk to pk
Isolated Controls: TTL Channel "Up"
Source Voltage, Sink
Current
Inverted and
Buffered TTL
Duty Cycle
All Types
0
≤
0.5 (Isink 3 mA min)
1
≥
2.4 (300
μ
A max or open collector)
1
≥
2.4, 0
≤
0.55 ± (sources 0.8 mA, sinks 3 mA)
< 15
VDC
VDC
ms
Isolated Controls: Analog "Up"
Range
Range
12 V
0 to +5
0 to +5
20.0 K
< ±2
24 V
0 to +10
0 to +10
VDC
VDC
Local Input Impedance
Full Scale
Full Scale
30 Min Warmup, Per
8 h, per day
0 to +55 °C
Symmetric or
Asymmetric Signal
Ω
mV
VDC
VDC
VDC
ppm/°C
Hz
< ±0.2%
< ±0.05%
< 0.02%
< ±10
DC to 4
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