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QBK033A0B41-HZ

P1-P3P4-P6P7-P9P10-P12P13-P15
Data Sheet
Januar
y
26, 2011
QBK033A0B Series Power Modules; DC-DC Converters
36
–
60 Vdc In
p
ut; 12Vdc Out
p
ut; 33A Out
p
ut Current
LINEAGE POWER 7
Test Configurations
Note: Measure input reflected-ripple current with a simulated
source inductance (LTEST) of 12 µH. Capacitor CS offsets
possible battery impedance. Measure current as shown above.
Figure 9. Input Reflected Ripple Current Test Setup.
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
tantalum capacitor. Scope measurement should be made
using a BNC socket. Position the load between
51 mm and 76 mm (2 in. and 3 in.) from the module.
Figure 10. Output Ripple and Noise Test Setup.
LOAD
CONTACT AND
SUPPLY
I
I
CONTACT
V
I
(+)
V
I
(–)
V
O1
DISTRIBUTION LOSSES
RESISTANCE
I
O
V
O2
Note: All measurements are taken at the module terminals.
When socketing, place Kelvin connections at module terminals
to avoid measurement errors due to socket contact resistance.
Figure 11. Output Voltage and Efficiency Test Setup.
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance source. A highly inductive source
impedance can affect the stability of the power module.
For the test configuration in Figure 9, a 100μF
electrolytic capacitor (ESR<0.7 at 100kHz), mounted
close to the power module helps ensure the stability of
the unit. Consult the factory for further application
guidelines.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e., UL 1950, CSA C22.2 No. 60950-00, and VDE
0805:2001-12 (IEC60950 3
rd
Ed).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75Vdc), for the module’s output to be considered as
meeting the requirements for safety extra-low voltage
(SELV), all of the following must be true:
The input source is to be provided with reinforced
insulation from any other hazardous voltages,
including the ac mains.
One V
IN
pin and one V
OUT
pin are to be grounded, or
both the input and output pins are to be kept
floating.
The input pins of the module are not operator
accessible.
Another SELV reliability test is conducted on the
whole system (combination of supply source and
subject module), as required by the safety agencies,
to verify that under a single fault, hazardous
voltages do not appear at the module’s output.
Note: Do not ground either of the input pins of the
module without grounding one of the output pins.
This may allow a non-SELV voltage to appear
between the output pins and ground.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a
maximum 30 A fast-acting (or time-delay) fuse in the
unearthed lead.
Data Sheet
Januar
y
26, 2011
QBK033A0B Series Power Modules; dc-dc Converters
36
–
60 Vdc In
p
ut; 12Vdc Out
p
ut; 33A Out
p
ut Current
8 LINEAGE POWER
Feature Descriptions
Overcurrent Protection
To provide protection in a fault output overload condition,
the module is equipped with internal current-limiting
circuitry and can endure current limiting for a few mili-
seconds. If the overcurrent condition persists beyond a
few milliseconds, the module will shut down and remain
latched off. The overcurrent latch is reset by either
cycling the input power or by toggling the on/off pin for
one second. If the output overload condition still exists
when the module restarts, it will shut down again. This
operation will continue indefinitely until the overcurrent
condition is corrected.
An auto-restart option is also available. An auto-restart
feature continually attempts to restore the operation until
fault condition is cleared.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic-high
voltage on the ON/OFF pin, and off during a logic low.
Negative logic remote on/off turns the module off during
a logic high and on during a logic low. Negative logic,
device code suffix "1," is the factory-preferred
configuration. The on/off circuit is powered from an
internal bias supply. To turn the power module on and
off, the user must supply a switch to control the voltage
between the on/off terminal and the Vi (-) terminal
(Von/off). The switch can be an open collector or
equivalent (see Figure 12). A logic low is Von/off = -0.3V
to 0.8V. The typical Ion/off during a logic low is 10 µA.
The switch should maintain a logic-low voltage while
sinking 10µA. During a logic high, the maximum Von/off
generated by the power module is 3.5V. The maximum
allowable leakage current of the switch at Von/off = 2.0V
is 4µA. If using an external voltage source, the maximum
voltage V on/off on the pin is 13.5V with respect to the
Vi (-) terminal.
If not using the remote on/off feature, perform one of the
following to turn the unit on:
For negative logic, short ON/OFF pin to VI(-).
For positive logic: leave ON/OFF pin open.
V
O
(+)
V
O
(–)
V
I
(–)
+
–
I
on/off
ON/OFF
V
I
(+)
LOA
D
V
on/off
Figure 12. Remote On/Off Implementation.
Output Overvoltage Clamp
The output overvoltage clamp consists of a control
circuit, independent of the primary regulation loop, that
monitors the voltage on the output terminals and clamps
the voltage when it exceeds the overvoltage set point.
The control loop of the clamp has a higher voltage set
point than the primary loop. This provides a redundant
voltage control that reduces the risk of output
overvoltage.
Overtemperature Protection
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. The circuit
shuts down and latches off the module when the
maximum device reference temperature is exceeded.
The module can be restarted by cycling the dc input
power for at least one second or by toggling the remote
on/off signal for at least one second.
Input Under/Over voltage Lockout
At input voltages above or below the input under/over
voltage lockout limits, module operation is disabled. The
module will begin to operate when the input voltage level
changes to within the under and overvoltage lockout
limits.
Forced Load Sharing (Parallel Operation with
–P option)
For additional power requirements, the power module
can be configured for parallel operation with forced load
sharing. Good layout techniques should be observed
for noise immunity when using multiple units in parallel.
To implement forced load sharing, the following
connections should be made:
The share pins of all units in parallel must be
connected together. The path of these connections
should be as direct as possible.
The on/off pins of all modules should also be tied
together so that the modules are turned on and off
at the same time.
These modules do not block reverse current flow
upon start-up, and can sink large currents from the
energized output bus, which may cause other
converters to reach their overcurrent limits, and/or
exceed this module’s device internal ratings. The
use of OR’ing diodes or FETS to block reverse
current flow is strongly encouraged to prevent
module damage, or abnormal tripping of other
parallel converters.
When not using the parallel feature, leave the share pin
open.
The auto-restart option (4) is not available for modules
with the parallel, -P, option.
Data Sheet
Januar
y
26, 2011
QBK033A0B Series Power Modules; DC-DC Converters
36
–
60 Vdc In
p
ut; 12Vdc Out
p
ut; 33A Out
p
ut Current
LINEAGE POWER 9
Feature Descriptions (continued)
Thermal Considerations
The power modules operate in a variety of thermal
environments and sufficient cooling should be provided
to help ensure reliable operation.
Thermal considerations include ambient temperature,
airflow, module power dissipation, and the need for
increased reliability. A reduction in the operating
temperature of the module will result in an increase in
reliability. The thermal data presented here is based on
physical measurements taken in a wind tunnel.
Heat-dissipating components are mounted on the top
side of the module. Heat is removed by conduction,
convection and radiation to the surrounding environment.
Proper cooling can be verified by measuring the thermal
reference
temperature (T
H
). Peak temperature (T
H
)
occurs at the position indicated in Figure 13. For reliable
operation this temperature should not exceed the listed
temperature threshold.
Figure 13. Location of the thermal reference
temperature T
H
.
The output power of the module should not exceed the
rated power for the module as listed in the Ordering
Information table.
Although the maximum T
H
temperature of the power
modules is 110 °C - 115 °C, you can limit this
temperature to a lower value for extremely high
reliability.
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. The thermal derating figures
(14-16) show the maximum output current that can be
delivered by each module in the respective orientation
without exceeding the maximum T
H
temperature versus
local ambient temperature (T
A
) for air flows of 1 m/s (200
ft./min), 2 m/s (400 ft./min) and 3 m/s (600 ft./min).
The use of Figures 14 - 15 are shown in the following
example:
Example
What is the minimum airflow necessary for a
QBK033A0B operating at VI = 48 V, an output current of
16A, and a maximum ambient temperature of 70 °C in
transverse orientation.
Solution:
Given: VI = 48V, Io = 17A, T
A
= 70 °C
Determine required airflow (V) (Use Figure 14):
V = 1.0 m/sec. ( 200 ft./min.) or greater.
OUTPUT CURRENT, I
O
(A)
10
14
18
22
26
30
34
20 30 40 50 60 70 80 90
200 lfm
(1.0 m/s)
400 lfm
(2.0 m/s)
600 lfm
(3.0 m/s)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 14. Output Current Derating for the
QBK033A0B in the Transverse Orientation; Airflow
Direction from Vin(+) to Vin(-); Vin = 48V.
OUTPUT CURRENT, I
O
(A)
6
12
18
24
30
36
20 30 40 50 60 70 80 90
NC
600 lfm
(3.0 m/s)
400 lfm
(2.0m/s)
200 lfm
(1.0m/s)
LOCAL AMBIENT TEMPERATURE, T
A
(C)
Figure 15. Output Current Derating for the
QBK033A0B (Vo = 12V) in the Transverse
Orientation with baseplate; Airflow Direction from
Vin(+) to Vin(–); Vin = 48V.
P1-P3P4-P6P7-P9P10-P12P13-P15

QBK033A0B41-HZ

Mfr. #:
Buy QBK033A0B41-HZ
Manufacturer:
ABB Embedded Power
Description:
Isolated DC/DC Converters 48Vin 12Vout 33A TH baseplt autorestart
Lifecycle:
New from this manufacturer.
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