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File Name: eighth_brick.pdf Rev (07): 16 Nov 2005
Eighth-Brick Series | 100 W DC-DC
High Efficiency, High Current, Low Profile DC-DC Converters
EIGHTH-BRICK SERIES
Single Output Ultra Products
High efficiency topology and high output current
Low profile, 0.300 in (7.62 mm) height
Industry standard eighth-brick footprint (identical to quarter-brick pinout)
38% savings in space over industry standard quarter-brick converters
Wide operating ambient temperature range, -40 °C to +85 °C
80% to 110% output trim
Basic insulation, 2250 Vdc
Overvoltage and overtemperature protection
Remote ON/OFF
Approvals to EN60950-1 VDE and UL/cUL60950
100 V, 100 msec input voltage transients rated
Monotonic startup into normal and prebiased loads
Secondary side control, no optocouplers, fast transient response
Available RoHS compliant
The Eighth-Brick Ultra series is a new
100 W, low cost, high efficiency, open
frame, isolated converter in an industry
standard eighth-brick footprint and
operates from a 36 Vdc to 75 Vdc supply.
This new series elevates the power density
threshold for high-end application design
requirements where high output current at
low voltages are required. The converter
architecture takes advantage of open-
frame construction to provide low mass
and a low thermal impedance for a single
board design.
Additionally, a patent pending, full wave
coupled inductor topology yields some of
the highest full load efficiencies in the
industry. All Eighth-Brick converters have,
as standard features, remote ON/OFF
capability, adjustable output voltage trim
from 80% to 110% of nominal, over-
current/under-voltage protection, and full
international safety approval including
EN60950-1 VDE and cUL60950.
Patent No. 6,765,810
Other Patents Pending
[ 2 YEAR WARRANTY ]
1
File Name: lf_eighth_brick_100w_ultra.pdf Rev (04): 15 Nov 2005
SXA10
Eighth-Brick Series |
Series |
W DC-DC
100
10W DC/DC
High Efficiency, High Current, Low Profile DC-DC Converters
Stresses in excess of the maximum ratings can cause permanent damage to the device. Operation of the device is not implied at these or any
other conditions in excess of those given in the specification. Exposure to absolute maximum ratings can adversely affect device
reliability.
Absolute Maximum Ratings
Characteristic
Input voltage - continuous
Input voltage - peak/surge
Input voltage - remote pin
Operating temperature
Storage temperature
Symbol
Vin (cont)
Vin (peak)
Vrem (peak)
Top
Tstorage
Min
-0.3
-0.3
-0.3
-40
-55
Typ
Max
75
100
75
85
125
100
99
100
Units
Vdc
Vdc
Vdc
˚C
˚C
W
W
W
Notes and Conditions
Vin(+) - Vin(-)
Transients of 100 ms or less,
in duration
Peaks of any duration
Measured at ambient
Output power (LES40A48-2V5J) Pout (max)
Output power (LES30A48-3V3J) Pout (max)
Output power (LES20A48-5V0J) Pout (max)
All specifications are typical at nominal input Vin = 48 V and full rated resistive load at 25
˚C
ambient unless otherwise specified.
Input Characteristics
Characteristic
Input voltage - operating
Input current - no load
Input current - Quiescent
Inrush current (i
2
t)
Inrush current ratio
Input ripple rejection
Input fuse
Symbol
Vin (oper)
lin
lin (off)
linrush
It/Im
Min
36
Typ
48
Max
75
50
6
0.01
22
50
10
Units
Vdc
mAdc
mAdc
A
2
s
dB
A
Frequency <1 kHz
Slow Blow/Antisurge HRC
recommended 200 V Rating.
See Application Note 138
Vin (min) - Vin (max), enabled
Converter disabled
Notes and Conditions
Turn On/Off
Characteristic
Input voltage - turn on
Input voltage - turn off
Turn on delay - enabled,
then power applied
Symbol
Vin (on)
Vin (off)
Tdelay
(power)
33
Min
Typ
35.5
33.5
15
20
Max
36
Units
Vdc
Vdc
ms
With the Remote ON/OFF signal
asserted, time from when Vin >
Vin (oper) until Vout is within
total regulation band
With Vin = Vin (nom), then
Remote ON/OFF asserted,
time until Vo is within total error
band
5
8
ms
From 10% to 90%, full resistive
load, no external capacitance
Notes and Conditions
Turn on delay - power
applied, then enabled
Tdelay
(enable)
15
20
ms
Rise time
Trise
2
File Name: lf_eighth_brick_100w_ultra.pdf Rev (04): 15 Nov 2005
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