45
Features
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DC input range: 36 – 75V
DC outputs: 1.5 to 12V
Low profile: 0.350'' above board height
Multiple fin configurations
Effective power density: Up to 188W/in
3
Parallelable, with N+M fault tolerance
Low noise ZCS/ZVS architecture
Input surge withstand: 100V for 100ms
Data Sheet
PRELIMINARY
PowerStick
™
DC-DC Converters
Low Profile, Integral Cooling
Up to 75W
Typical Applications
Typical applications include communications,
data processing, test equipment, industrial
applications and distributed power systems.
Absolute Maximum Ratings
Parameter
+In to –In voltage
+In to –In voltage
PC to –In voltage
PR to –In voltage
SC to –Out voltage
–Sense to –Out voltage
Isolation voltage (in to out)
Isolation voltage (in to case)
Isolation voltage (out to case)
Storage temperature (C-Grade)
Operating temperature (C-Grade)
Rating
-0.5 to +75
100
-0.5 to +7.0
-0.5 to +7.0
-0.5 to +1.5
1.0
1500
1500
1500
-40 to +125
-20 to +100
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
°C
°C
Case Temp.
<100ms
Notes
Product Overview
PowerStick features an above board height of
only 0.35'' and a footprint as small as 2.28''L x
0.5''W. PowerStick converters deliver up to
75 Watts per module and up to 900 Watts in
fault-tolerant arrays.
Vicor’s innovative through-the-board mounting
results in an effective power conversion density
of 188W/in
3
. A wraparound aluminum body,
available in a variety of options, provides integral
cooling in a broad range of applications and
thermal environments, allowing customers to
achieve peak power density within the 0.35''
low profile.
All members of the PowerStick family maintain
the complete feature set of Vicor 2nd Generation
converters. And, because PowerSticks are
environmentally sealed and encased in aluminum,
they offer superior ruggedness, reliability,
electrical shielding and noise performance.
Low voltage models incorporate Vicor’s
innovative Smart Rectification
TM
for high
efficiency.
Part Numbering
PS 4 8
Input Voltage
M
3V3D
Output Voltage
1V5 = 1.5V, 15A
1V5D = 1.5V, 10A
1V8 = 1.8V, 15A
1V8D = 1.8V, 10A
2 = 2.0V, 15A
2D = 2.0V, 10A
2V5 = 2.5V, 15A
2V5D = 2.5V, 10A
3V3 = 3.3V, 15A
3V3D = 3.3V, 10A
5 = 5V, 12A
12 = 12V, 75W
F3 Case
C
S
Case Configuration
See below and page 7
Mounting
Height
M:
0.35''
Product Grade Temperatures (°C)
Grade
Storage
Operating
C = - 40 to +125 - 20 to +100
T = - 40 to +125 - 40 to +100
S Case
0.35''
Above Board Height
F1 Case
F2 Case
F4 Case
Vicor Corporation
Tel: 800-735-6200 • 978-470-2900 • Fax: 978-475-6715
Page 1
For the most current data and applications support, visit vicr.com.
ELECTRICAL CHARACTERISTICS
PRELIMINARY
Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and case temperature,
unless otherwise specified. All temperatures refer to the operating temperature at the top center of the case.
MODULE OPERATING SPECIFICATIONS
Parameter
Operating input voltage
Input surge withstand
Min
36
Typ
48
Max
75
100
Unit
Vdc
Vdc
<100ms
Notes
MODULE OUTPUT VOLTAGE RELATED SPECIFICATIONS
Parameter
Output Voltage Setpoint
Ripple and noise, p-p (typ.)
Output Power (max.)
Output Current (max.)
10 or 15
6.3
1.9
0.3
115
115
14.3
1.9
0.2
115
115
1.5 to 3.3V
±1%
180
5V
±1%
250
60
12V
±1%
160
75
Unit
Vout nom.
mV
Watts
Amps
Volts
Watts
±% Vout
% Iout
% Iout
No load; nominal input
No load to full load; nominal input
Output voltage 95% of nominal
Output voltage < 250mV
Notes
Nominal Input, 75% load, 25°C
Nominal Input; full load; 25°C, 20MHz BW
At 100°C Case Temperature
At 100°C Case Temperature
Output OVP setpoint (nom.) 115% Vnom +0.5
Dissipation, standby (typ.)
Load regulation (max.)
Current limit (typ.)
Short circuit current (typ.)
1.8
0.3
115
115
MODULE INPUT SPECIFICATIONS
Parameter
Undervoltage turn-on
Undervoltage turn-off
Overvoltage turn-off/on
29.4
75.7
Min
Typ
34.9
30.5
78.8
82.5
Max
35.7
Unit
Vdc
Vdc
Vdc
Notes
MODULE OUTPUT SPECIFICATIONS
Parameter
Line regulation
Temperature regulation
Power sharing accuracy
Programming range
10
Min
Typ
±0.02
±0.002
±2
Max
±0.2
±0.005
±5
110
Unit
%
% / °C
%
%
Notes
Low line to high line; full load
-20 to 100°C
10 to 100% of full load
Of nominal output voltage. For trim below 90% of
nominal, a minimum load of 10% of maximum rated
power may be required.
Note:
For important information relative to applications where the converters are subject to continuous dynamic loading,
contact Vicor Applications Engineering at 800-927-9474 or your local Vicor office.
Vicor Corporation
Tel: 800-735-6200 • 978-470-2900 • Fax: 978-475-6715
Page 2
For the most current data and applications support, visit vicr.com.
ELECTRICAL CHARACTERISTICS, continued
PRELIMINARY
MODULE CONTROL SPECIFICATIONS
Parameter
Min
Typ
Max
Unit
Notes
PRIMARY SIDE
(PC = Primary Control; PR = Parallel)
PC bias voltage
current limit
PC module disable
PC module enable delay
PC module alarm
PR emitter amplitude
PR emitter current
PR receiver impedance
PR receiver threshold
PR drive capability
SECONDARY SIDE
(SC = Secondary Control)
SC bandgap voltage
SC resistance
SC capacitance
SC module alarm
1.22
990
1.23
1000
0.033
0
1.24
1010
Vdc
ohms
µF
Vdc
With open trim; referenced to –Sense. See Fig. 6
Referenced to –Sense
5.7
150
375
2.4
500
2.5
625
2.6
12
5.9
1.5
2.5
2.1
2.5
4
3.0
2.6
7
0.5
6.1
mA
Vdc
ms
Vavg
Volts
mA
ohms
Volts
Modules
25°C
Minimum pulse width: 20ns
Without PR buffer amplifier
UV, OV, module fault. See Figs. 2, 4
PR load >30 ohms, < 30 pF
PC voltage = 5.5V
Must be able to sink
≥4
mA. See Fig. 1
MODULE GENERAL SPECIFICATIONS
Parameter
Remote sense (total drop)
Isolation voltage (in to out)
Isolation voltage (in to case)
Isolation voltage (out to case)
Isolation resistance (in to out)
Weight
Agency Approvals
1500
1500
1500
10
0.9 (26)
UL, CSA, TÜV, BABT, CE, VDE
Min
Typ
Max
0.5
Unit
Vdc
Vdc
Vdc
Vdc
Megohms
Ounces (grams)
S Case
UL1950, CSA950, EN60950, VDE0805, BS7002,
IEC 60950. With a fuse in a series with the +Input
Notes
0.25V per leg (senses must be closed)
TYPICAL PERFORMANCE 45°C, 400LFM, 100% Duty Cycle
Case Configuration
Max. Power @ 12Vout
Max. Current @ 3.3Vout
S
32W
6.4A
F1
37W
7.5A
F2
45W
9A
F3
55W
11A
F4
71W
14A
For complete thermal design support, and the complete list of package options, see our web site at vicr.com/powerstick.
Vicor Corporation
Tel: 800-735-6200 • 978-470-2900 • Fax: 978-475-6715
Page 3
For the most current data and applications support, visit vicr.com.
CONTROL FUNCTIONS - PC PIN
Module Enable/Disable
The module may be disabled by pulling PC below 2.3V with
respect to the –Input. This may be done with an open collector
transistor, relay, or optocoupler. Multiple converters may be
disabled with a single transistor or relay either directly or via
“OR’ing” diodes. See Figure 1.
Primary Auxiliary Supply
At 5.7V, PC can source up to 1.5mA. In the example shown
in Figure 3, PC powers a Module Enabled LED.
PRELIMINARY
Module Alarm
The module contains “watchdog” circuitry which monitors
input voltage, and internal operating parameters. In the event
that any of these parameters are outside of their allowable
operating range, the module will shut down and PC will go
low. PC will periodically go high and the module will check to
see if the fault has cleared. If the fault has not been cleared, PC
will go low again and the cycle will restart. The SC pin will go
low in the event of a fault and return to its normal state after
the fault has been cleared. See Figures 2, 4.
+IN
+IN
SW1
Auto
Restart
2-20ms typ.
f (VIN)
Input Undervoltage
Input Overvoltage
Module Faults
50Ω
SW2
SW3
1.23
Vdc
1K
+OUT
+S
SC
-S
-OUT
Disable
Disable = PC <2.3V
PC
PR
-IN
PC
PR
-IN
SW1, 2, & 3
shown in
"Fault" position
5.7 Vdc
(0-3mA)
6K
Figure 1—Module
enable/disable.
Figure 2—PC/SC
module alarm logic.
+IN
PC
PR
-IN
Fault
PC
5.7V
40µs typ.
"Module
Enabled"
4kΩ
SC
1.23V
2-20ms typ.
Figure 3—LED
on-state indicator.
Figure 4—PC/SC
module alarm timing.
Optocoupler
+IN
PC
PR
-IN
+OUT
+S
SC
-S
-OUT
1.00V
Alarm
4kΩ
Figure 5—Isolated
on-state indicator.
Figure 6—Secondary
side on-state indicator.
Page 4
Vicor Corporation
Tel: 800-735-6200 • 978-470-2900 • Fax: 978-475-6715
For the most current data and applications support, visit vicr.com.
CONTROL FUNCTIONS - SC PIN
Output Voltage Programming
The output voltage of the converter can be adjusted or
programmed via fixed resistors, potentiometers or voltage
DACs. See Figures 7 & 8.
PRELIMINARY
+OUT
Error
Amp
1kΩ
0.033
µF
1.23V
+OUT
R
D
Trim Down
+S
SC
-S
-OUT
Load
Error
Amp
1kΩ
0.033
µF
1.23V
+S
SC
-S
-OUT
R
U
Trim Up
Load
R
D
(ohms) =
1,000 Vout
Vnom - Vout
R
U
(ohms) =
1,000
(Vout-1.23)
Vnom
1.23
(Vout-Vnom)
- 1,000
Figure 7—Output
voltage trim down circuit.
Trim Down
1. This converter is not a constant power device – it has a
constant current limit. Hence, available output power is
reduced by the same percentage that output voltage is
trimmed down. Do not exceed maximum rated output current.
2. The trim down resistor must be connected to the –Sense pin.
Figure 8—Output
voltage trim up circuit.
Trim Up
1. As output voltage is increased, reduce output current maximum
to insure that maximum rated power is not exceeded.
2. The trim up resistor must be connected to the +Sense pin.
3. Do not trim the converter above maximum trim range
(typically +10%) or the output over voltage
protection circuitry may be activated.
Trim values calculated automatically:
Resistor trim calculators are available on
Vicor’s web site, vicr.com, by selecting
Calculators from the Toolbox.
Resistor values can be calculated for fixed
trim up, fixed trim down and for variable
trim up or down by selecting the trim
calculator for 2nd Generation DC-DC
converters.
In addition to trimming information, the
web site also includes design tips,
applications circuits, EMC suggestions,
thermal design guidelines and PDF data
sheets for all available Vicor products.
Vicor Corporation
Tel: 800-735-6200 • 978-470-2900 • Fax: 978-475-6715
Page 5
For the most current data and applications support, visit vicr.com.
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