Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
Control Functions
page 1
GLDW34V03 – 1/4 Brick Dorado HV
Ordering Information
• 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
• 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
• Over temperature protection
• Over voltage protection
• Over current protection
• Over/Under input voltage protection
Typical Characteristics
• 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)
GLDW34V03 PSR 00X 123
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
† @ 60˚ C rise heat sink to ambient ‡ @ 300'/min.
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
Dorado HV Heat Sink
Part Numbers
Standard Model Number Input Voltage Output Voltage Max Current
GLDW34V03* 48V 34V 3A
* Options:
P = Positive Logic Version;
High = On
S = 0.12" Pins (± .01")
R = Heat Sink-Ready
E = 0.18" Pins (± .01")
M = 0.145" Pins (± .01")
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
page 2
Input Specifications
Parameter Min Typical Max Units
Operating Input Voltage 36 48 75 VDC
Input Current 4 A
Input Capacitance 2 µF
Maximum Turn-on Voltage 35.5 V
Minimum Turn-on Voltage 30.0 V
Input Hysteresis, Low Line 2 VDC
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.
Output Specifications
Parameter Min Typical Max Units
Output Voltage/Trim Range116.5 35.5 VDC
Remote Sense Compensation 1 V
Regulation Over Line, Load & Temperature 97 103 %VNOM
Voltage Ripple 30 mVRMS
Current Range – Trimmed to 26V 0 3.6 A
Current Range – Untrimmed 0 3 A
Current Limit Inception2110 130 %IOUT
Turn-on Time to 98% Vnom 400 mS
Output Overshoot at Turn-on 1 %VOUT
Over Voltage Protection 115 %VOUT
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.)
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
page 3
General Specifications
Operating Temperature -40˚ C to + 100˚ C
Storge Temperature -55˚ C + 125˚ C
Relative Humidity 10% to 95% RH, Non-condensing
Vibration 2 to 9 Hz, 3mm disp., 9 to 200 Hz, 1g
Material Flammability UL V-0
Weight 35 grams
MTBF Telcordia (Bellcore) 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.
Isolation Specifications
Parameter Min Typical Max Units
Isolation Test Voltage, Input/Baseplate/Output (Basic) 2000 VDC
Isolation Resistance 10 MΩ
3. PCB less than 130˚ C.
Features
Parameter Min Typical Max Units
Over Temperature Protection, Thermal Sensor3117 ˚ C
Switching Frequency, Fixed 333 kHz
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
page 4
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.
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.
• 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.
Under Voltage Hysteresis
6
5
4
3
2
1
0
30 34 37
Input Voltage (V)
Output Voltage (V)
3632 33 3531
Over Voltage Hysteresis
6
5
4
3
2
1
0
76.5 78.5 80.5
Input Voltage (V)
Output Voltage (V)
79.577.5 78 807977
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
page 5
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
CoolConverter™
RTRIM-UP = 6.2Vout (V)
– 3 kΩ
14.02 (2.5 - 0.055 Iout (A) – Vout (V)
{ }
Trim-up
Trim-down
RTRIM-DOWN = 100 _ 2 kΩ
∆%
{ }
Decrease in Output Voltage (%)
1.103
100
10
1
0510 15 20 25 30 35 40 45 50
Trim Resistance (kΩ)
Resistor across Trim Pin
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
page 6
Efficiency Data Power Dissipation
Start Up Voltage Ripple
1. VOUT 10V/div 40mS/div
2. Enable 5V/div
1. VOUT 50mV/div 1µS/div
Bode Plot
Line/Load Regulation
30.000
30.500
31.000
31.500
32.000
32.500
33.000
33.500
34.000
34.500
35.000
35.500
36.000
0 1.5 3
Output Current (A)
Output Voltage (V)
36V Vin
48V Vin
75V Vin
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
GLDW34V03
DORADO HV DC/DC CONVERTER
48V Input – 34VDC – 3A Output
page 7
Setpoint vs. Line/Load
Current Limit vs. Line/Trim Voltage
Transient Response Transient Response
50% to 75% Load Transients
at VIN = 48V@TA = 25˚C
75% to 50% Load Transients
at VIN = 48V@TA = 25˚C
CORPORATE
Bel Fuse Inc.
206 Van Vorst Street
Jersey City, NJ 07302
Tel 201-432-0463
Fax 201-432-9542
www.belfuse.com
FAR EAST
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
EUROPE
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
©2006 Bel Fuse Inc. Specifications subject to change without notice. 11.06
POWER PRODUCTS
DORADO HV DC/DC CONVERTER
GLDW34V03
48V Input – 34VDC – 3A Output
page 8
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
Mechanical
GLDW34V03
Pin Function Pin Dia. (In.)
1– Input 0.040
2On/Off 0.040
3+ Input 0.040
4+ Output 0.060
5+ Sense 0.040
6Trim 0.040
7– Sense 0.040*
8 – Output 0.060
Pin Configuration – Bottom View
* 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.
