ACON
DC-DC CONVERTERS
TM
L
Series,
25 -30W
Input Ranges :
9-75 VDC
Output Output:
Single Output
3.3V - 24V
Bipolar Output
±5.0V, ±12V, ±15V
Triple Output
+5.0V / ±12V,
+5.0V / ±15V
Output Power:
16 - 30 W
The
L
DC-DC converters feature high power density, high efficiency and
excellent line & load regulation. Using innovative design technique, state-of-the
art Current Mode PWM control, and Surface Mount packaging & manufacturing
technology, the L series provides up to 30 watts of well regulated power in a
encapsulated 2.56” x 3.0” x 0.40” metal case with six-sided EMI/RFI shielding.
Automatic feed forward compensation, pulse-by-pulse current limiting, and output
short circuit protection are standard for all models.
These converters are designed for wide input range telecommunications,
industrial and instrument applications. The wide input range (2: & 4:) is ideal for
battery or unregulated input applications.
FEATURES
General:
• Small footprint : 2.56” x 3.0”
• Current-Mode Control
• Input/Output Isolation
• Input Voltage from 9 to 75Vdc
• 2: & 4: Input Voltage Range
• High conversion efficiency: 80%
• Line & load regulation to ±1.0%
• Fixed operating frequency
• Six-Sided Shielding
Isolation:
• Isolation Voltage >500V
APPLICATIONS
• Distributed Power Systems
• Workstations
• Computer Equipment
• Communications Equipment
No external components are needed for normal operation. Low ESR capacitors
are used to minimize the conductive noise. This package is ideal for all I/O board
system and distributed DC power configurations.
TABLE OF CONTANTS :
General
Specifications
.................................................................................................. 2
Single Output ................................................................................................................ 4
Bipolar Output ............................................................................................................. 6
Triple Output .................................................................................................................
8
ACON, INC.
• www.aconinc.com
L
Series
Rev. Jun. 20, 2000
Pg. of 9
ACON
Input Voltage
DC-DC CONVERTERS
TM
L
Series,
25 -30W
Conditions / Description
2
24
48
W24
W48
2
24
48
W-24
W-48
All models, base plate temperature
Ambient
Input to Output
1. Absolute Maximum Ratings
Parameter
Continuous
Stresses in excess of the absolute maximum ratings can cause performance degradation, adversely effect longterm reliability,
and cause permanent damage to the device.
Min
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-0.3
-40
-55
Max
20
38
78
38
78
22
40
80
40
80
+95
+05
+700
Units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
°C
°C
Vdc
Transient
(00mSec.)
Operating Temperature
Storage Temperature
Isolation Voltage
2. Input Specifications
Parameter
Input Voltage
Voltage Range
(Continuous)
2
24
48
W-24
W-48
Conditions / Description
Min
9
18
36
0
20
Nom
2
24
48
24
48
Max
18
36
75
36
75
Units
Vdc
Vdc
Vdc
Vdc
Vdc
3. Enable (On-Off Control)
Parameter
Enable Pin
Open Circuit Voltage
Source Current
Positive Logic
On-Control
Off-Control
Negative Logic
Conditions / Description
Standard
Logic High or Floating
Not Available
Min
Nom
5
Max
18
1.8
Units
Vdc
mA
Vdc
Vdc
5.0
-0.5
* Enable pin can be left floating if not used.
4. Output Specifications
Parameter
Voltage Accuracy
Output Current
Output Trim
Over Voltage Protection
Line Regulation
Load Regulation
Transient Respoonse
Ripple & Noise
Switching Frequency
Please see table
Please see table
Not Available
Not available
Conditions / Description
Min
Nom
Max
50% ± 25% step load change
Please see table
400
200
±.0
±.0
%
Adc
%Vout
Vdc
%Vout
%Vout
µSec.
mVp-p
KHz
Units
ACON, INC.
• www.aconinc.com
L
Series
Rev. Jun. 20, 2000
Pg. 2 of 9
ACON
Negative Trim
Trim Up
Trim Down
Positive Trim
DC-DC CONVERTERS
TM
L
Series,
25 -30W
Standard
Trim Pin to (-)Vout
Trim Pin to (+)Vout
Not Available
5. Output Trim
Parameter
Conditions / Description
Min
0
Nom
Max
0
Units
%Vdc
%Vdc
* Trim pin can be left floating if not used
6. Environmental and Mechanical Specifications
Parameter
Conditions / Description
Operating Temperature
Storage Temperature
Temperature Coefficient
Shock
Sinusoidal Vibration
Humidity
Weight
MTBF (calculated)
PCB Temperature
Halfsine wave, 3 axes
GR-63-CORE, Section 5.4.2
Relative Humidity, Non-Condensing
Bellcore TR-NWT-000332 method - parts count
Min
-40
-55
50
0.5
Nom
Max
+95
+05
±0.02
95
Units
°C
°C
%/°C
g
g
%R.H.
Oz (g)
MHrs
6.7 (90)
7. Isolation Specifications
Parameter
Isolation Voltage
Input to Output
I/O to Case
Isolation Resistance
Isolation Capacitance
Conditions / Description
Input to Output
Input to Output
Min
500
500
0
Nom
Max
Units
Vdc
Vdc
MΩ
nF
3
ACON, INC.
• www.aconinc.com
L
Series
Rev. Jun. 20, 2000
Pg. 3 of 9
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