DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
GLDW34V03 –
1
/
4
Brick Dorado HV
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Industry standard pinout and footprint
High efficiency: 87% at 34V, 3A; 89% at 34V, 1.5A
Droop feature allows current sharing
Very low common-mode noise for a commercial DC/DC converter
Two-stage input filter
Constant switching frequency
Remote sense
Single board design
Optional low profile heat sink for improved thermal performance
Header with M3 metal inserts for mechanical connection to PCB
POWER PRODUCTS
GLDW34V03
Control Functions
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Compatible with fan turn-on
requirements
Designed to be stable with
high capacitance load
Uses innovative control and power
topology for lower parts count
Microprocessor controlled
Primary-side enable, choice of logic
Protection Features
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Over temperature protection
Over voltage protection
Over current protection
Over/Under input voltage protection
Typical Characteristics
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Output setpoint accuracy: ± 0.2%
Load regulation: – 0.77V/A untrimmed
Line regulation: ± 0.2%
Low output ripple
Output trim
Example Part Number:
(All options)
Ordering Information
Standard Model Number
GLDW34V03*
* Options:
P
= Positive Logic Version;
High = On
Input Voltage
48V
Output Voltage
34V
Max Current
3A
S
= 0.12" Pins (± .01")
R
= Heat Sink-Ready
GLDW34V03 PS R 0 0 X 1 2 3
Part Number
Options:
Positive Logic Version
Optional Pin Lengths
E
= 0.18"
M
= 0.145"
S
= 0.12"
Heat Sink-Ready
Heat Sink
001 = 0.25"
002 = 0.50"
003 = 1.00"
004 = 0.13"
Latched
OVP and OTP latch immediately
OCP latches after 3 seconds
E
= 0.18" Pins (± .01")
M
= 0.145" Pins (± .01")
Dorado HV Heat Sink
Part Numbers
Part
Number
001
002
003
004
Height
0.25"
0.50"
1.00"
0.13"
Typical Thermal Performance
Natural Convection
Power Dissipation
†
5W
7W
11W
TBD
‡ @ 300'/min.
Forced Convection
Thermal Resistance
‡
5.8
˚
C/W
3.2
˚
C/W
2.0
˚
C/W
TBD
† @ 60
˚
C rise heat sink to ambient
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 11.06
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 1
POWER PRODUCTS
GLDW34V03
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
Input Specifications
Parameter
Operating Input Voltage
Input Current
Input Capacitance
Maximum Turn-on Voltage
Minimum Turn-on Voltage
Input Hysteresis, Low Line
30.0
2
2
35.5
Min
36
Typical
48
Max
75
4
Units
V
DC
A
µF
V
V
V
DC
VIN = 48V
DC
, T
A
@25˚ C, 300 LFM Airflow, V
OUT
= 34V
DC
, I
OUT
= 68µF electrolytic capacitor across
output pins. Available output power depends on ambient temperature and good thermal management.
(See application graphs for limits.)
Output Specifications
Parameter
Output Voltage/Trim Range
1
Remote Sense Compensation
Regulation Over Line, Load & Temperature
Voltage Ripple
Current Range – Trimmed to 26V
Current Range – Untrimmed
Current Limit Inception
2
Turn-on Time to 98% Vnom
Output Overshoot at Turn-on
Over Voltage Protection
115
0
0
110
130
400
1
97
Min
16.5
Typical
Max
35.5
1
103
30
3.6
3
Units
V
DC
V
%V
NOM
mV
RMS
A
A
%I
OUT
mS
%V
OUT
%V
OUT
1. Trimming is realized by connecting an external resistor between “trim” pin and “–sense” pin.
See graph and formula on page 4.
2. Current limit inception is output voltage dependent. See Current Limit Graph on page 5.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 11.06
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 2
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
POWER PRODUCTS
GLDW34V03
Isolation Specifications
Parameter
Isolation Test Voltage, Input/Baseplate/Output (Basic)
Isolation Resistance
Min
2000
10
Typical
Max
Units
V
DC
MΩ
Features
Parameter
Over Temperature Protection, Thermal Sensor
3
Switching Frequency, Fixed
3. PCB less than 130
˚
C.
333
Min
Typical
Max
117
Units
˚
C
kHz
General Specifications
Operating Temperature
Storge Temperature
Relative Humidity
Vibration
Material Flammability
Weight
MTBF Telcordia (Bellcore)
-40
˚
C to + 100
˚
C
-55
˚
C + 125
˚
C
10% to 95% RH, Non-condensing
2 to 9 Hz, 3mm disp., 9 to 200 Hz, 1g
UL V-0
35 grams
1.6 million hours
Approvals and Standards
UL and c-UL Recognized Component, TUV,
UL60950, CSA 22.2 No. 950, IEC/EN 60950**
EMC Characteristics:
Designed to meet emission and immunity
requirements per EN55022, CISPR 22,
Class B, and CISPR 24.
** An external fuse shall be used to comply with
the requirements.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 11.06
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 3
POWER PRODUCTS
GLDW34V03
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
Application Notes
CoolConverter
™
Bel Power’s Proprietary CoolConverter™
•
Patented single-stage power conversion architecture,
control and magnetic design allow unprecedented
power density and efficiency in an isolated power
supply.
•
An advanced microcontroller reduces parts count
while adding features, performance and flexibility in
the design.
•
Low common-mode noise as a result of lower capacitance
in the transformer compared to planar magnetics and metal
baseplate designs.
Higher reliability than planar transformer designs that can
suffer from via fatigue from thermal cycling, and metal
baseplate designs with board to board interconnects that
are subject to mechanical stress on electrical connections.
•
Protection and Control
Valid Input Voltage Range
The converter measures the input voltage and will not allow
operation outside of the input voltage specification. As
shown by the graphs, hysteresis is added to both the high
and low voltage to prevent the converter from turning on and
off repeatedly when the voltage is held near either voltage
extreme. At low line, this assures the maximum input current
is not exceeded; at high line, this assures the semiconductor
devices in the converter are not damaged by excessive
voltage stress.
ON/OFF Logic Option
The ON/OFF control logic can be either Negative (standard)
or Positive to enable the converter. For Negative logic, the
ON/OFF pin is brought to below 1.0V with respect to the
–INPUT pin to enable the converter. The pull-down must be
able to sink 100µA. For Positive logic, the ON/OFF pin is
brought to greater than 4.0V with respect to the –INPUT pin
and be limited to less than 10V. To request the Positive logic
version, add the suffix (P) to the standard part number. The
ON/OFF pin has a built-in pull-up resistor of approximately
100kΩ to +5V.
Output Over Voltage Protection
The output voltage is monitored by a redundant secondary-
side circuit. If the ouput voltage exceeds the over voltage
specification, the microprocessor will restart every 2 seconds
and limit voltage with a separate reference circuit. This
advanced feature prevents the converter from damaging the
load if there is a converter failure or application error. Latching
is available as an option.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 11.06
Over Voltage Hysteresis
6
5
4
3
2
1
0
76.5
Output Voltage (V)
77
77.5
78
78.5
79
79.5
80
80.5
Input Voltage (V)
Under Voltage Hysteresis
6
5
4
3
2
1
0
30
Output Voltage (V)
31
32
33
34
35
36
37
Input Voltage (V)
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 4
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
POWER PRODUCTS
GLDW34V03
CoolConverter
™
Protection and Control
Over Current Protection
If over current lasts more than 2 seconds the converter will
shut down and try to restart every 10 seconds until the fault is
removed. Latching is available as an option.
Thermal Shutdown
The printed circuit board temperature is measured using a
semiconductor sensor. If the maximum rated temperature
is exceeded, the converter is latched off. To re-enable the
converter requires cycling the ON/OFF pin or power to the
converter. If non-latching shutdown is required, consult
factory.
Remote Sense
The output voltage is regulated at the point where the
sense pins connect to the power output pins. Total sense
compensation should not exceed 0.4V or 2% of Vout,
whichever is greater.
Sharing
Two modules can passively share a common load of 2 - 6A
at 60/40% maximum imbalance with diode ORing when their
output voltages are controlled with a common control on the
trim pins, from 17V to 32V output range.
Safety
An external input fuse must always be used to meet these
safety requirements.
External Output Trimming
R
TRIM-DOWN
=
Trim-up
= 6.2V
out
(V)
14.02 (2.5 - 0.055 I
out
(A) – V
out
(V)
R
TRIM-UP
{
}
– 3 kΩ
Trim-down
{
100 _ 2
∆%
}
kΩ
Resistor across Trim Pin
1.10
3
Trim Resistance (kΩ)
100
10
1
0
5
10
15
20
25
30
35
40
45
50
Decrease in Output Voltage (%)
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 11.06
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 5
