BOLERO HV DC/DC CONVERTERS
48V Input – 52VDC – 4A Output
GPBR52V04A –
1
/
2
Brick Bolero HV Series
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•
•
•
•
•
•
•
•
Industry standard pinout and footprint
Highest efficiency in the industry: 92% at 52V, 4A; 91% at 52V, 2A
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
POWER PRODUCTS
GPBR52V04A
Typical Characteristics
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Output setpoint accuracy: ± 2%
Load regulation: ± 0.25%
Line regulation: ± 0.25%
Regulation over line, load and
temperature: ± 2%
Low output ripple
50% output trim-down
Supports IEEE 802.3af power over LAN
2250V isolation
Control Functions
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•
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
GPBR52V04A*
* Options:
M
= 0.145" Pins (± .01")
Input Voltage
48V
Output Voltage
52V
Max Current
4A
Example Part Number:
(All options)
R
= Heat Sink-Ready
G
= Case Ground Pin
GPBR52V04A MRG 0 0X
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"
Specifications subject to change without notice.
051811
Bolero 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
©2011 Bel Fuse Inc.
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 1
POWER PRODUCTS
GPBR52V04A
BOLERO HV DC/DC CONVERTERS
48V Input – 52VDC – 4A Output
Input Specifications
Parameter
Operating Input Voltage
Input Current
Input Capacitance
Input Hysteresis, Low Line
5
2
Min
36
Typical
48
Max
75
7
Units
V
DC
A
μF
V
DC
VIN = 48V
DC
, T
A
@25˚ C, 300 LFM Airflow, V
OUT
= 52V
DC
, I
OUT
= Full load unless otherwise noted.
C
OUT
= 180μF Al-Elec. Available output power depends on ambient temperature and good thermal
management. (See application graphs for limits.)
Output Specifications
Parameter
Setpoint
Voltage Ripple, 180μF Load Capacitance
Voltage Ripple, 180μF Load Capacitance
Current Range
Current Limit Inception
Short Circuit Current
1
Settling Time to ± 1%
2
Turn-on Time to 98% Vnom
Output Overshoot at Turn-on
Trim Range, Lucent 1/2 Brick Trim
Over Voltage Protection, Latching
50
120
0
100
120
6
1
40
None
110
Min
51.45
Typical
52.50
Max
53.55
30
80
4
Units
V
DC
mV
RMS
mV
P–P
A
%I
OUT
A
mS
mS
%V
OUT
%V
OUT
%V
OUT
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.
051811
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
48V Input – 52VDC – 4A Output
POWER PRODUCTS
GPBR52V04A
Isolation Specifications
Parameter
Isolation Test Voltage, Input/Output (Basic)
Isolation Resistance
Min
2250
10
Typical
Max
Units
V
DC
M
Features
Parameter
Over Temperature Protection, Thermal Sensor, Latching
3
Input, Output Ripple Frequency, Fixed
3. PCB less than 130
˚
C.
330
Min
Typical
Max
115
Units
˚
C
kHz
General Specifications
Operating Temperature,
Baseplate
Storge Temperature
Relative Humidity
Vibration
Material Flammability
Weight
MTBF Bellcore TR-332
-40
˚
C to + 100
˚
C
-55
˚
C + 125
˚
C
Approvals and Standards
UL and c-UL Recognized Component, TUV,
UL1950, CSA 22.2 No. 950, IEC/EN 60950**
Pending.
EMC Characteristics:
10% to 95% RH, Non-condensing
2 to 9 Hz, 3mm disp., 9 to 200 Hz, 1g
UL V-0
55 grams
1.6 million hours
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.
©2011 Bel Fuse Inc.
Specifications subject to change without notice.
051811
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 3
POWER PRODUCTS
GPBR52V04A
BOLERO HV DC/DC CONVERTERS
48V Input – 52VDC – 4A 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.
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
100k to +5V.
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 non-
latching is required, consult factory.
©2011 Bel Fuse Inc.
Specifications subject to change without notice.
051811
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 4
BOLERO HV DC/DC CONVERTERS
48V Input – 52VDC – 4A Output
POWER PRODUCTS
GPBR52V04A
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.
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.
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.
External Output Trimming
R
TRIM-DOWN
=
Trim-up
R
TRIM-UP
=
{
V
O
(100+ %)
1.225 %
_
(100+2 %)
%
}
k
52V Trim-up
10000
Trim Resistance (kΩ)
1000
100
0
1
2
3
4
5
6
7
8
9
10
Increase in Output Voltage (%)
{
100 _ 2
%
}
k
Trim-down
6
6
Trim Resistance (kΩ)
1000
7
7
100
8
8
10
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.
0
0
1
2
3
4
5
6
7
8
9
10
Decrease in Output Voltage (%)
©2011 Bel Fuse Inc.
Specifications subject to change without notice.
051811
Bel Power Inc.
155 Flanders Road, Westborough, MA 01581 • Tel 508-870-9775 • Fax 508-870-9796 • www.belpower.com
page 5
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