Hi-Rel HOLD-UP MODULE
HUGD-50 : 50W POWER
Hi-Rel
Grade
Hold-Up Solution
16-40V & 9-36V DC/DC Converter Compatible
Metallic Case
• Unique Product for Hold-Up Solution
• Reduce Capacitance by 80%
• High efficiency (98%)
• Power range : from 4W to 50W
• Compatible with 9-36 or 16-40VDC Converter
• Include monitoring signals
• Programmable inrush current limitation
1-General
The GAIA Converter Hold up device
HUGD-50 provides a state-of-the-art solution to
the problem of maintaining electronic system in
operation during input bus drop-out with enough
time. Usually this approach uses very large
capacitors because they are only charged at the
voltage at which power fail. The Gaïa Converter
HUGD-50 module provides an alternative solu-
tion to reduce the amount of capacitance needed
by charging the hold up capacitor at a high vol-
tage (typically 38V) while limiting the input
current.
The HUGD-50 needs to be connected between
the line source and DC/DC modules (if an EMI
filter and /or a pre-regulator are used, the
HUGD-50 is connected between them and the
converters). Basically the HUGD-50 charges the
external capacitor to 38V while powering the
DC/DC converters. If the power fails, the
HUGD-50 generates a signal and the converters
are powered from the external capacitor. The
HUGD-50 can be used either with 16-40V or 9-
36V input voltage DC/DC converters since the
«power fail voltage» is externally adjustable
between 8.8V and 15.3V by the user.
The HUGD-50 features 3 modes of operations:
•
Charging operation mode : when the
input voltage ramps-up and reaches the start-
up charge threshold (which is set at 1Vdc above
the «power fail voltage»), the HUGD-50 begins
to charge the external capacitor at 38 VDC while
powering the dc/dc converter. the charging
current is controled and externally adjustable
between 100mA and 2A by a resistance. The
capacitor charging time depends on the charging
current. When the capacitor voltage reaches 34V,
(representing 90% of charge) the signal (active,
floating output collector) «capacitor charged»
is activated and the HUGD-50 enters in the nor-
mal operation mode.
•
Normal operation mode : in normal
operation mode with the capacitor charged and
the input bus is between the «output power fail»
and 40VDC, the HUGD-50 consumes only power
to keep the capacitor charged (i.e.less than 1W.
The voltage drop between input and output is
lower than 150mV in the worth case (50W power
and 9 VDC input voltage) The HUGD-50 will
operate indefinitely until the input voltage drops
below the «power fail voltage» threshold.
•
Power fail mode : when the input vol-
tage drops below the «power fail voltage»
threshold a «power fail» signal is activated and
the HUGD-50 disconnects input and output and
connects the hold-up capacitor to the output.
At this point the DC/DC converters are powered
by the capacitor. When 90% of the usable stored
energy in the capacitor is activated and operation
will stop as the energy reaches zero.
4
2-Product Selection
HUGD - 50 (/T) and/or (/S)
(/T) : option for -55°C start up operating temperature.
(/S) : option for screening and serialization
REDEFINING THE SOURCE OF POWER
©
Gaia Converter FC97-027.01/06 Revision H
For locations, phone, fax, E-Mail see back cover
HUGD-50 Series
3- Block Diagram
The HUGD-50 module includes 3 main circuits :
• An input monitoring circuit
• An hold-up charger circuit
• A hold-up monitoring circuit
•
Input monitoring Circuit
:
The input monitoring circuit monitors the value of
the input bus voltage and compares it to the power
fail threshold voltage (Vth) set externally through a
resistor. Depending on this comparison, the circuit
allows the activation of the hold-up switch and the
hold-up charger and generates an isolated power fail
flag (PF).
•
Hold-up Charger
:
The hold-up charger is used to feed the hold-up
capacitor with a constant Vc=38V voltage. The de-
sign of this charger has been optimized to minimize
the input inrush current which can be set externally
through the Vcl input by a resistor.
Hi-Rel
Grade
•
Hold-up monitoring Circuit :
The hold-up monitoring circuit monitors the charging
status of the hold-up capacitor.
The circuit generates 2 isolated flags : the capacitor
charged flag (CC) and the capacitor discharged flag
(CD).
These flags can be used at system level for manage-
ment of power interruption (VME system, PCI, ...)
The HUGD-50 features 3 modes of operations :
• Charging operation mode
• Normal operation mode
• power fail mode
The following figure represents the HUGD-50 series
block diagram.
HUGD-50 Block Diagram
Vi
Vo
4
Vth
Input
Monitoring
Hold-up
Charger
Vc
PF
CC
Hold-up
Monitoring
CD
Vcl
Gi
Go
©
2
Gaia Converter FC97-027.01/06 Revision H
For locations, phone, fax, E-Mail see back cover
HUGD-50 Series
4- Electrical Specifications
Data are valid at +25°C, unless otherwise specified.
Hi-Rel
Grade
Parameter
Input
Permanent input voltage
range (Ui)
Conditions
Limit or typical
Units
HUGD-50
Full temperature load
Full load
Full temperature load
Full load
with the setting
Vth unconnected
Minimum
Maximum
VDC
VDC
9
40
Transient input voltage
Maximum
Minimum
Typical
Maximum
Minimum
Typical
Maximum
Minimum
Maximum
VDC/ms
VDC
VDC
VDC
VDC
VDC
VDC
A
A
50/100
15
15,3
15,6
8,6
8,8
9
0,1
1,5
Power fail voltage
threshold (Vfail)
Power fail voltage
threshold (Vfail)
with the setting
Vth connected to ground
Input current consumption
during charging at 28V
min: Vcl unconnected
max: Vcl connected to ground
Input current consumption
during charging at 16V
Output
Output admissible power
min: Vcl unconnected
max: Vcl connected to ground
Minimum
Maximum
A
A
0,1
2,2
4
Full temperature load
Full load
Vin @ 9V, full power
Maximum
W
50
Dissipated power
Maximum
W
1
Voltage drop input/ouput
Capacitor charged signal
threshold
Capacitor discharged signal
threshold
Capacitor discharged signal
threshold
Maximum admissible
hold-up capacitor
Vin @ 9V, full power
Maximum
Minimum
Maximum
mV
VDC
VDC
VDC
VDC
VDC
VDC
µF
µF
µs/µF
µs/µF
µs/µF
µs/µF
160
33,8
34,8
15,9
16,7
9,4
10,2
470
30.000
11,2
12,8
55,6
64,4
3
with setting
Vth unconnected
with setting
Vth connected to ground
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
Hold-up time at full load
Vth unconnected
Vth connected to ground
Vth unconnected
Vth connected to ground
Minimum
Minimum
Minimum
Minimum
Hold-up time at 10W load
©
Gaia Converter FC97-027.01/06 Revision H
For locations, phone, fax, E-Mail see back cover
HUGD-50 Series
5- Switching Frequency
Parameter
Switching frequency
Conditions
Full temperature range
Ui min. to max.
No load to full load
Limit or typical
Nominal, fixed
Specifications
200 KHz
Hi-Rel
Grade
6- Isolation
Parameter
Electric strength test voltage
Conditions
Input to output
Limit or typical
/
Specifications
No isolation
4
7- Reliability Data
Characteristics
Conditions
Ground fixed (Gf)
Mean Time Between Failure (MTBF)
According to MIL-HDBK-217F
Airborne, Inhabited,
Cargo (AIC)
Avionics Military Cargo
Temperature
Case at 40°C
Case at 85°C
Case at 40°C
Case at 85°C
/
Specifications
1.500.000 Hrs
590.000 Hrs
730.000 Hrs
300.000 Hrs
Consult factory
Mean Time Between Failure (MTBF)
According to IEC-62380-TR
©
4
Gaia Converter FC97-027.01/06 Revision H
For locations, phone, fax, E-Mail see back cover
HUGD-50 Series
8- Thermal Characteristics
Characteristics
Operating ambient temperature
range at full load
Operating case temperature
range at full load
Storage temperature range
Thermal resistance
Conditions
Ambient temperature *
Case temperature
Non functionning
Rth case to ambient in free air
natural convection
Limit or typical
Minimum
Maximum
Minimum
Maximum
Minimum
Maximum
Typical
Hi-Rel
Grade
Performances
- 40°C
+ 85°C
- 40°C
+105°C
- 55°C
+ 125°C
12°C /W
Note * : The upper temperature range depends on configuration, the user must assure a max. case temperature of + 105°C.
The HUGD-50 series operating
case
temperature must not exceed 105°C. The maximum
ambient
temperature admissible for
the DC/DC converter corresponding to the maximum operating case temperature of 105°C depends on the ambient airflow,
the mounting/orientation, the cooling features and the power dissipated.
To calculate a maximum admissible ambient temperature the following method can be used. Knowing the maximum case
temparature Tcase = 105°C of the module, the power used Pout and the efficiency
η :
• determine the power dissipated by the module Pdiss that should be evacuated :
Pdiss = Pout(1/η - 1)
η
• determine the maximum ambient temperature :
Ta = 105°C - Rth x Pdiss
where
Rth is the thermal resistance from the case to ambient.
The previous thermal calculation shows two areas of operation :
• a normal operation area in a free natural ambient convection (grey area in this following graph),
• an area with cooling features (air flow or heatsink) ensuring a maximum case temperature below the maximum
operating case temperature of 105°C (white area in the following graph).
4
Power (W)
100%
Additionnal cooling operation area
75%
50%
Natural convection operation area
25%
10
20
30
40
50
60
70
80
90
100 110
Temperature (˚C)
Full load ambient temperature without derating : 85˚C
Maximum case temperature : 105˚C
Maximum storage temperature : 125˚C
©
5
Gaia Converter FC97-027.01/06 Revision H
For locations, phone, fax, E-Mail see back cover
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
