BOLERO HV DC/DC CONVERTERS
POWER PRODUCTS
48V Input – 24VDC – 8A Output
GPBW24V08
GPBW24V08 – 1/2 Brick Bolero HV Series
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Industry standard pinout and footprint
Highest efficiency in the industry: 92% at 24V, 8A; 92% at 24V, 4A
No heat sink required (baseplate standard)
Very low common-mode noise for a commercial DC/DC converter
Two-stage input filter
Constant switching frequency, 330 kHz
Remote sense
Single board SMT construction
Low profile, 0.43"
Optional low profile heat sink or baseplate for improved thermal performance
Header with M3 metal inserts for mechanical connection to PCB
Typical Characteristics
Control Functions
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Output setpoint accuracy: ± 1.5%
Load regulation: ± 0.25%
Line regulation: ± 0.25%
Regulation over line, load and
temperature: ± 3%
Low output ripple
50% output trim-down
Supports IEEE 802.3af power over LAN
2250V isolation
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
Ordering Information
Standard Model Number
GPBW24V08*
* Options:
M = 0.145" Pins (± .01")
Input Voltage
Output Voltage
Max Current
48V
24V
8A
R = Heat Sink-Ready
G = Case Ground Pin
Bolero HV Heat Sink
Part Numbers
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)
‡ @ 300'/min.
GPBW24V08 M R G 0 0 X
Part Number
Options:
Optional Pin Lengths
E = 0.18"
M = 0.145" (Std.)
S = 0.12"
Heat Sink-Ready Plate (Std.)
Case Ground Pin (Std.)
Heat Sink
001 = 0.25"
002 = 0.50"
003 = 1.00"
004 = 0.13"
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 1
POWER PRODUCTS
BOLERO HV DC/DC CONVERTERS
48V Input – 24VDC – 8A Output
GPBW24V08
Input Specifications
Parameter
Operating Input Voltage
Min
Typical
Max
Units
36
48
75
VDC
7
A
Input Current
Input Capacitance
5
µF
Input Hysteresis, Low Line
2
VDC
VIN = 48VDC, TA@25˚ C, 300 LFM Airflow, VOUT = 24VDC, IOUT = Full load unless otherwise noted.
COUT = 180µF Al-Elec. Available output power depends on ambient temperature and good thermal
management. (See application graphs for limits.)
Output Specifications
Parameter
Min
Typical
Max
Units
23.64
24.00
24.36
VDC
Voltage Ripple, 180µF Load Capacitance
30
mV RMS
Voltage Ripple, 180µF Load Capacitance
80
mV P–P
8
A
Setpoint
Current Range
Current Limit Inception
0
100
115
%IOUT
Short Circuit Current1
12
A
Settling Time to ± 1%2
1
mS
Turn-on Time to 98% Vnom
40
mS
Output Overshoot at Turn-on
None
%VOUT
105
%VOUT
Trim Range, Lucent 1/2 Brick Trim
Over Voltage Protection, Latching
50
125
%VOUT
1. During short circuit, converter will shut down and attempt to restart once per second. The average current during this
condition will be very low and the device can be safely left in this condition continuously.
2. 50% load change only resulted in 1% output voltage step.
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 2
BOLERO HV DC/DC CONVERTERS
POWER PRODUCTS
48V Input – 24VDC – 8A Output
GPBW24V08
Isolation Specifications
Parameter
Min
Isolation Test Voltage, Input/Output (Basic)
2250
VDC
10
MΩ
Isolation Resistance
Typical
Max
Units
Features
Parameter
Min
Typical
Over Temperature Protection, Thermal Sensor, Latching3
Input, Output Ripple Frequency, Fixed
Max
Units
115
˚C
330
kHz
3. PCB less than 130˚ C.
Approvals and Standards
General Specifications
Operating Temperature,
Baseplate
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
55 grams
MTBF Bellcore TR-332
UL and c-UL Recognized Component, TUV,
UL1950, CSA 22.2 No. 950, IEC/EN 60950**
Pending.
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
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 3
POWER PRODUCTS
BOLERO HV DC/DC CONVERTERS
48V Input – 24VDC – 8A Output
GPBW24V08
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
Over Voltage Hysteresis
6
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.
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.
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)
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
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)
Output Over Voltage Protection
The output voltage is constantly monitored by the
microprocessor with a redundant secondary-side
measurement circuit that both shuts down the duty cycle and
triggers the microprocessor to shut down. If the output voltage
exceeds the over voltage specification, the microprocessor
will latch the converter off. To turn the converter on required
either cycling the ON/OFF pin or power to the converter. This
advanced feature prevents the converter from damaging the
load if there is a converter failure or application error. If nonlatching is required, consult factory.
5
37
BOLERO HV DC/DC CONVERTERS
POWER PRODUCTS
48V Input – 24VDC – 8A Output
GPBW24V08
CoolConverter™
Protection and Control
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.
Trim-up
Rtrim-UP
{
=
Vo (100+∆%) _
1.225∆%
}
(100+2∆%)
∆%
kΩ
24V Trim-up
Control Options
As the behavior of the circuit is determined by firmware in the
microcontroller, specific requirements, such as:
• non-latching thermal protection
• custom valid input voltage range
• controlled delay from initiating an ON/OFF signal for
power sequencing
can be accomplished with no change to hardware. The
standard behavior was chosen based on system design
experience, but customers may have their own requirements.
Please contact Bel Power for any special needs.
Trim Resistance (kΩ)
10000
1000
100
0
1
2
3
4
5
6
7
8
9
10
9
10
Increase in Output Voltage (%)
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.
Trim-down
Safety
An external input fuse must always be used to meet these
safety requirements.
Rtrim-DOWN =
{
External Output Trimming
100 _ 2
∆%
}
kΩ
Trim-down
6
7
7
8
8
Trim
To trim the output voltage higher, connect the required trim
resistor from the Trim pin to the +Sense pin. To trim the output
voltage lower, connect the required trim resistor from the Trim
pin to the –Sense pin. See diagram above.
1000
Trim Resistance (kΩ)
6
100
10
0
0
1
2
3
4
5
6
7
8
Decrease in Output Voltage (%)
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 5
BOLERO HV DC/DC CONVERTERS
POWER PRODUCTS
48V Input – 24VDC – 8A Output
GPBW24V08
Efficiency Data
Power Dissipation
Start Up
Voltage Ripple
1. VOUT 1mV/div 20µS/div
1. VOUT 24V/div 20mS/div
2. Enable 5V/div
Line/Load Regulation
23.900
Output Voltage (V)
23.860
23.820
23.780
23.740
23.700
23.660
36V Vin
48V Vin
75V Vin
23.620
23.580
23.540
23.500
0
4
8
Output Current (A)
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 6
BOLERO HV DC/DC CONVERTERS
48V Input – 24VDC – 8A Output
POWER PRODUCTS
GPBW24V08
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
©2011 Bel Fuse Inc. Specifications subject to change without notice. 052011
Bel Power Inc. 155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 7
BOLERO HV DC/DC CONVERTERS
48V Input – 24VDC – 8A Output
GPBW24V08
Mechanical
GPBW24V08
0.43 ±0.01
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.
2011 Bel Fuse Inc. Specifications subject to change without notice.052011
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