DORADO HV DC/DC CONVERTER
POWER PRODUCTS
48V Input – 34VDC – 3A Output
GLDW34V03
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
Protection Features
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
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
Ordering Information
Standard Model Number
Input Voltage
Output Voltage
Max Current
48V
34V
3A
GLDW34V03*
* Options:
P = Positive Logic Version;
High = On
E = 0.18" Pins (± .01")
M = 0.145" Pins (± .01")
Dorado HV Heat Sink
Part Numbers
S = 0.12" Pins (± .01")
R = Heat Sink-Ready
Typical Thermal Performance
Part
Number
Height
Natural Convection
Power Dissipation†
Forced Convection
Thermal Resistance‡
001
0.25"
5W
5.8˚ C/W
002
0.50"
7W
3.2˚ C/W
003
1.00"
11W
2.0˚ C/W
004
0.13"
TBD
TBD
† @ 60˚ C rise heat sink to ambient
Example Part Number:
(All options)
GLDW34V03 PSR 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
‡ @ 300'/min.
©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
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
GLDW34V03
Input Specifications
Parameter
Operating Input Voltage
Min
Typical
Max
Units
36
48
75
VDC
4
A
Input Current
Input Capacitance
2
µF
Maximum Turn-on Voltage
Minimum Turn-on Voltage
Input Hysteresis, Low Line
35.5
V
30.0
V
2
VDC
VIN = 48VDC, TA@25˚ C, 300 LFM Airflow, VOUT = 34VDC, IOUT = 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
Min
Output Voltage/Trim Range1
16.5
Typical
Remote Sense Compensation
Regulation Over Line, Load & Temperature
97
Voltage Ripple
Max
Units
35.5
VDC
1
V
103
%VNOM
30
mVRMS
Current Range – Trimmed to 26V
0
3.6
A
Current Range – Untrimmed
0
3
A
Current Limit Inception2
110
130
%IOUT
Turn-on Time to 98% Vnom
400
mS
Output Overshoot at Turn-on
1
%VOUT
Over Voltage Protection
115
%VOUT
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
POWER PRODUCTS
48V Input – 34VDC – 3A Output
GLDW34V03
Isolation Specifications
Parameter
Min
Isolation Test Voltage, Input/Baseplate/Output (Basic)
2000
VDC
10
MΩ
Isolation Resistance
Typical
Max
Units
Features
Parameter
Min
Typical
Over Temperature Protection, Thermal Sensor3
Switching Frequency, Fixed
Max
Units
117
˚C
333
kHz
3. PCB less than 130˚ C.
Approvals and Standards
General Specifications
Operating Temperature
Storge Temperature
Relative Humidity
Vibration
Material Flammability
Weight
-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
MTBF Telcordia (Bellcore)
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.
1.6 million hours
©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
DORADO HV DC/DC CONVERTER
POWER PRODUCTS
48V Input – 34VDC – 3A Output
GLDW34V03
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.
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An advanced microcontroller reduces parts count
while adding features, performance and flexibility in
the design.
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Low common-mode noise as a result of lower capacitance
in the transformer compared to planar magnetics and metal
baseplate designs.
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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
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 secondaryside 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.
Over Voltage Hysteresis
Output Voltage (V)
6
5
4
3
2
1
0
76.5
77
77.5
78
78.5
79
79.5
80
Under Voltage Hysteresis
6
5
4
3
2
1
0
30
31
32
33
34
35
36
Input Voltage (V)
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 4
80.5
Input Voltage (V)
Output Voltage (V)
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.
37
DORADO HV DC/DC CONVERTER
POWER PRODUCTS
48V Input – 34VDC – 3A Output
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.
Trim-up
Rtrim-UP
{
= 6.2Vout (V)
14.02 (2.5 - 0.055 Iout (A) – Vout (V)
}
– 3 kΩ
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.
Trim-down
Rtrim-DOWN =
Safety
An external input fuse must always be used to meet these
safety requirements.
{
100 _ 2
∆%
}
kΩ
Resistor across Trim Pin
External Output Trimming
Trim Resistance (kΩ)
1.103
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
DORADO HV DC/DC CONVERTER
POWER PRODUCTS
48V Input – 34VDC – 3A Output
GLDW34V03
Efficiency Data
Power Dissipation
Start Up
Voltage Ripple
1. VOUT 50mV/div 1µS/div
1. VOUT 10V/div 40mS/div
2. Enable 5V/div
Output Voltage (V)
Line/Load Regulation
36.000
35.500
35.000
34.500
34.000
33.500
33.000
32.500
32.000
31.500
31.000
30.500
30.000
Bode Plot
36V Vin
48V Vin
75V Vin
0
1.5
3
Output Current (A)
©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 6
DORADO HV DC/DC CONVERTER
POWER PRODUCTS
48V Input – 34VDC – 3A Output
GLDW34V03
Transient Response
Transient Response
50% to 75% Load Transients
75% to 50% Load Transients
at VIN = 48V@TA = 25˚C
at VIN = 48V@TA = 25˚C
Current Limit vs. Line/Trim Voltage
Setpoint vs. Line/Load
©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 7
DORADO HV DC/DC CONVERTER
POWER PRODUCTS
48V Input – 34VDC – 3A Output
GLDW34V03
Mechanical
GLDW34V03
Pin Configuration – Bottom View
Pin
Function
Pin Dia. (In.)
1
– Input
0.040
2
On/Off
0.040
3
+ Input
0.040
4
+ Output
0.060
5
+ Sense
0.040
6
Trim
0.040
7
– Sense
0.040*
8
– Output
0.060
Notes:
1. Mechanical tolerances
x.xxx in. = ± 0.005 in.
x.xx in = ± 0.01 in.
2. Pin material: Brass with tin/lead plating over nickel
3. Workmanship: Meets or exceeds IPC-A-610B Class II
4. "A" = 0.040" dia. pins
5. "B" = 0.060" dia. pins
* Connected to –Output internally.
RoHS Compliance
Complies with the European Directive 2002/95/EC, calling for the elimination of lead and other
hazardous substances from electronic products. These parts are not however compatible with
the higher temperatures associated with lead free solder processes and must be soldered using
a reflow profile with a peak temperature of no more than 240˚C.
©2006 Bel Fuse Inc.
Specifications subject to change without notice. 11.06
CORPORATE
FAR EAST
EUROPE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
Bel Fuse Ltd.
8F / 8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel 852-2328-5515
Fax 852-2352-3706
www.belfuse.com
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Suite G7, Preston
Lancashire, PR1 8UD, U.K.
Tel 44-1772-556601
Fax 44-1772-888366
www.belfuse.com
page 8