ACON
DC-DC CONVERTERS
TM
GH
Single output
25
to
150W
Input Ranges:
10 - 75V
Single Output:
3.3V, 5.0V, 7.5V
12V, 15V, 24V
28V, 48V, 60V, 80V
Dual Output:
+5V/+12V
+5V/+15V
Bipolar Output:
±12V
±15V
FEATURES
General:
• Small footprint : .9” x 3.0”
• Output power : 25 - 00 watts
• Wide input range : 0-75Vdc
• Encapsulated
• Integral PCB transformer
• High conversion efficiency to 88%
• Line & load regulation to ±0.5%
• Fixed operating frequency
Protection:
• Output over-voltage protection
• Output over-load protection
• Hiccup mode short circuit
protection
• Over-temperature protection
• Input under-voltage lock-out
Control:
• Enable (On/Off) Control
• Output Voltage Trim
Isolation:
• Isolation Voltage > 500V
APPLICATIONS
• Distributed Power Systems
• Workstations
• Computer Equipment
• Communications Equipment
GH
series is a family of 25W to 00W DC-DC converters with high power
density, high efficiency, and high reliability. These converters are designed for wide
input range telecommunications, industrial, and instrument applications. The wide
input range (2:, 3:) is ideal for battery or unregulated input applications.
Integral PCB transformer / inductor is used for all models in this series. This new
design technique has greatly improved the magnetic coupling, reduced switching
spike and provided performance consistency. It also streamlines the production
process by completely eliminating the hand-wind magnetic assembly process from
production lines.
GH
series provides the most extensive protection to safeguard both the power
converter and the load. It includes output over-voltage protection, over-current
protection, hiccup mode indefinite short circuit protection, under-voltage lockout
and over-temperature protection. Over-current inception point is set at about 115%
of rated load. Hiccup mode cycles at 28mSec period with 3mSec on and 25mSec
off. Over-temperature shutdown activated at +5°C board temperature will recover
when the temperature falls below +95°C.
GH
series features low output noise, very tight line and load regulation, and high
efficiency. There is no external capacitor requirement for normal operation. Output
trim pin is standard.
TABLE OF CONTENT
Specifications
....................................................................................................... P.
Single Output ....................................................................................................... P.
Dual Output.......................................................................................................... P.
Bipolar Output ..................................................................................................... P.
2
4
0
2
ACON, INC.
• www.aconinc.com
GH
Series
July 20, 2007
Pg. of 3
ACON
Input Voltage
DC-DC CONVERTERS
TM
GH
Single output
25
to
150W
Conditions / Description
2
24
48
30
60
2
24
48
30
60
Standard temperature models, base plate temperature
Extended temperature 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
-55
Max
20
36
75
30
60
22
38
78
32
64
+05
+05
+25
+2000
Units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
°C
°C
°C
Vdc
Transient
(00mSec.)
Operating Temperature
Storage Temperature
Isolation Voltage
2. Input Specifications
Parameter
Input Voltage
Voltage Range
(Continuous)
Under-Voltage Lockout (UVLO)
Turn-On Threshold
(Ramping Up)
2
24
48
30
60
2
24
48
30
60
2
24
48
30
60
Conditions / Description
Min
0
18
36
0
20
Nom
2
24
48
24
48
9.7
7
35
9.7
7
9.7
6
33
9.2
6
Max
20
36
75
30
60
Units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Turn-Off Threshold
(Ramping Down)
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
0
Max
0
1.8
Units
Vdc
mA
Vdc
Vdc
2.5
-0.5
4. Output Trim
Parameter
Negative Trim
Trim Up
Trim Down
Positive Trim
*Trim
pin can be left floating if not used.
Standard
Trim Pin to (-)Vout
Trim Pin to (+)Vout
Not Available
Conditions / Description
Min
8
Nom
Max
0
Units
%Vdc
%Vdc
ACON, INC.
• www.aconinc.com
GH
Series
July 20, 2007
Pg. 2 of 3
ACON
DC-DC CONVERTERS
TM
GH
Single output
25
to
150W
Please see table
Please see table
5. Output Specifications
Parameter
Voltage Accuracy
Output Current
Output Trim
Over Voltage Protection
Line Regulation
Load Regulation
Transient Respoonse
Ripple & Noise
Switching Frequency
Conditions / Description
Min
Nom
Max
±.0
+10/-8
20
±0.2
±0.5
50% ± 25% step load change
Please see table
200
300
%
Adc
%Vout
%Vdc
%Vout
%Vout
µSec.
mVp-p
KHz
Units
6. Environmental and Mechanical Specifications
Parameter
Conditions / Description
Operating Temperature
Standard
Extended
Storage Temperature
Temperature Coefficient
Shock
Sinusoidal Vibration
Humidity
Weight
PCB Mount
Chassis Mount
MTBF (calculated)
PCB Temperature
Min
-25
-55
-55
50
Nom
Max
+00
+00
+25
±0.02
95
Units
°C
°C
°C
%/°C
g
g
%R.H.
Oz(g)
Oz(g)
MHrs
Halfsine wave, 3 axes
GR-63-CORE, Section 5.4.2
Relative Humidity, Non-Condensing
Bellcore TR-NWT-000332 method - parts count
2.5(70)
3.0(86)
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
8. Protections
Parameter
Over-Load Protection
Type
Threshold
Short-Circuit Protection
Type
Threshold
Over-Temperature Protection
Type
Threshold
Hysteresis
Over-Voltage Protection
Type
Set-Point
Conditions / Description
Current-Mode, Pulse by Pulse Current Limit
% Rated Load
Hiccup Mode, Non-Latching, Auto-Recovery
Short-Circuit Resistance
Non-Latching, Auto-Recovery
PCB Temperature
Voltage Latch
Min
Nom
20
Max
Units
%
65
5
5
20
mΩ
°C
°C
%Vout
ACON, INC.
• www.aconinc.com
GH
Series
July 20, 2007
Pg. 3 of 3
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