Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
FReta iEB Series DC/DC Power Modules
48V Input, 200W Output
Eighth Brick
The FReta Series offers an industry
standard 200W Eighth brick power module
featuring a high operating efficiency that
results in true useable power. The FReta
modules offer a fixed conversion ratio of 4:1.
The unregulated power train topology
provides a low cost, high performance, high
reliability solution that is suitable for
distributed power architectures that utilize an
intermediate voltage bus to power non-
isolated point of load converters.
Standard Features:
•
•
Size – 58.4mm x 22.9 mm x 12.3
mm (2.30 in. x 0.90 in. x 0.485 in.)
Long Thru-hole pins 4.57 mm
(0.180”)
High efficiency – greater than 94%
2250Vdc isolation voltage
Meets basic insulation spacing
requirements
Constant switching frequency
Industry Standard Footprint
Remote on/off (negative logic)
Auto-recovering input over-voltage
protection
•
•
Auto-recovering over-temperature
protection
Applying for UL 60950 (U.S. and
Canada), VDE 0805, CB scheme
(IEC950), CE Mark (EN60950)
ISO Certified manufacturing
facilities
•
•
•
•
Optional Features:
•
•
•
•
•
•
Remote on/off (positive logic)
Short Thru-hole pins 3.68 mm
(0.145”)
•
•
Auto-recovering output over-
current protection
Auto-recovering output short circuit
protection
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Mechanical Specification:
Dimensions are in mm [in]. Unless otherwise specified tolerances are: x.x ± 0.5 [0.02], x.xx and x.xxx ± 0.25 [0.010].
Recommended Hole Pattern: (top view)
Pin Assignment:
FUNCTION
PIN FUNCTION
PIN
1
Vin(+)
On/Off
Vin(-)
4
5
Vo(-)
2
Vo(+)
3
Pin base material is copper with plating; the maximum module weight is 30g (1.05 oz).
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Absolute Maximum Ratings:
Stress in excess of Absolute Maximum Ratings may cause permanent damage to the device
Characteristic
Min
-0.5
---
Max
75
Unit
Vdc
Vdc
Vdc
˚C
Notes & Conditions
Continuous Input Voltage
Transient Input Voltage
Isolation Voltage
---
---
2250
125
Basic insulation
Storage Temperature
-55
Measured at the location specified in the thermal
measurement figure. Maximum temperature varies
with model number, output current, and module
orientation – see curve in thermal performance
section of the data sheet.
Operating Temperature Range (Tc)
*Engineering estimation
-40
123*
˚C
Input Characteristics:
Unless otherwise specified, specifications apply over all Rated Input Voltage, Resistive Load, and Temperature conditions.
Characteristic
Operating Input Voltage
Maximum Input Current
Turn-on Voltage
Min
38
Typ
48
Max
53
Unit
Vdc
A
Notes & Conditions
---
---
6.5*
---
Vin = 0 to Vin,max
---
36
Vdc
Vdc
Vdc
mS
Turn-off Voltage
31*
0.5*
---
34.5
1.5
3
---
Hysteresis
---
Startup Delay Time from application of input
voltage
---
Vo = 0 to 0.1*Vo,nom; on/off =on,
Io=Io,max, Tc=25˚C
Startup Delay Time from on/off
---
3
---
mS
Vo = 0 to 0.1*Vo,nom; Vin = Vi,nom,
Io=Io,max,Tc=25˚C
Output Voltage Rise Time
Input Over-voltage Turn-off
Input Over-voltage Turn-on
Input Over-voltage Hysteresis
Inrush Transient
---
---
---
---
---
---
4
---
---
mS
Vdc
Vdc
Vdc
A2s
Io=Io,max,Tc=25˚C, Vo=0.1 to 0.9*Vo,nom
61
59
2
Input rising
Input falling
---
---
---
50
0.2
---
Input Reflected Ripple
mApp
See input/output ripple and noise
measurements figure; BW = 20 MHz
*Engineering estimation
Caution: The power modules are not internally fused. An external input line normal blow fuse with a maximum value of
10A is required; see the Safety Considerations section of the data sheet.
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
iEB48017A120V-000 through -007: 12V, 17A Output
Electrical Data:
Characteristic
Min
Typ
Max
Unit
Notes & Conditions
Output Voltage Initial Setpoint
---
12
---
Vdc
Vin=Vin,nom; Io=no load(0A); Tc = 25˚C
Over all rated input voltage, load, and
temperature conditions to end of life
Output Voltage Tolerance
7.9*
12
13.7
Vdc
Efficiency
---
---
94.5
3.8
---
---
%
V
Vin=Vin,nom; Io=Io,max; Tc = 25˚C
Line Regulation
Vin=Vin,min to Vin,max; Io=0A; Tc = 25˚C
Io=Io,min to Io,max; Vin=Vin,nom; Tc =
25˚C
Load Regulation
---
---
0.6
50
---
V
Temperature Regulation
---
19.5
17
mV
Tc=Tc,min to Tc,max; Io=Io,min
Vin=Vin,min
At loads less than Io,min the module will
operate correctly, but the output ripple may
increase.
Output Current
1*
---
A
Vin=Vin,nom
Vin=Vin,max
16
Output Current Limiting Threshold
Short Circuit Current
---
---
23
7
---
A
A
Vo = 0.9*Vo,nom, Tc<Tc,max
Vo = 0.25V, Tc = 25˚C
---
mVpp
---
---
100
30
200*
---
Measured across one 0.1uF, and 2x22uF
ceramic capacitors– see input/output ripple
measurement figure; BW = 20MHz
Output Ripple and Noise Voltage
mVrms
Dynamic Response:
Recovery Time
di/dt = 1A/uS, Vin=Vin,nom; load step from
0% to 100% of Io,max
---
---
25*
---
---
uS
700*
Transient Voltage
mV
Output Voltage Overshoot during startup
Ouput ripple Frequency
---
---
0
---
330
---
5
---
%
Vin=Vin,nom; Io=Io,max,Tc=25˚C
Fixed
kHz
uF
External Load Capacitance
Isolation Resistance
4000*&
---
10
---
MΩ
& Contact TDK Innoveta for applications that require additional capacitance or very low esr
*Engineering estimation
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Electrical Characteristics:
iEB48017A120V-000 through -007: 12V, 17A Output
96
95
94
93
92
91
90
14
12
10
8
6
4
2
0
0
2
4
6
8
10 12 14 16 18 20
0
2
4
6
8
10 12 14 16 18 20
Output Current (A)
Output Current (A)
Vin = 38V
Vin = 48V
Vin = 53V
Vin = 38V
Vin = 48V
Vin = 53V
iEB48017A120V-000 Typical Efficiency vs. Input
Voltage at Ta=25 degrees.
iEB48017A120V-000 Typical Power Dissipation vs.
Input Voltage at Ta=25 degrees
14
13
12
11
10
9
8
0
2
4
6
8
10 12 14 16 18 20
Output Current (A)
Vin = 38V
Vin = 53V
Vin = 48V
Vin = 42V
iEB48017A120V-000 Typical Output Voltage vs. Load
Current at Ta = 25 degrees
iEB48017A120V-001 Typical startup characteristic from
on/off at full load, 1mS/div. Lower trace - on/off signal
2V/div, upper trace – output voltage 5V/div.
iEB48017A120V-000 Typical startup characteristic
from input voltage application at full load, 1mS/div.
Lower trace - input voltage 20V/div, Upper trace –
output voltage 5V/div
iEB48017A120V-000 Typical transient response
10uS/div. Output voltage response to load step from
0% to 100% of full load with output current slew rate of
1A/uS, Upper trace – output voltage 1V/div.
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Electrical Characteristics (continued):
iEB48017A120V-000 through -007: 12V, 17A Output
14
13
12
11
10
9
8
0
2
4
6
8
10 12 14 16 18 20 22 24 26
Output Current (A)
Vin = 38V
Vin = 48V
Vin = 53V
iEB48017A120V-000 Typical Output Current Limit
Characteristics vs. Input Voltage at Ta=25 degrees.
iEB48017A120V-000 Typical Output Ripple at nominal
Input voltage and full load at Ta=25 degrees
14
6
5
4
3
2
1
12
10
8
6
4
2
0
0
31 33 35 37 39 41 43 45 47 49 51 53
31 33 35 37 39 41 43 45 47 49 51 53
Input Voltage (V)
Input Voltage (V)
Io_min = 0A
Io_mid = 10.1A
Io_max = 20.1A
Io_min = 0A
Io_mid = 10.1A
Io_max = 20.1A
iEB48017A120V-000 Typical Input Current vs. Input
Voltage Characteristics
iEB48017A120V-000 Typical Output Voltage vs. Input
Voltage Characteristics
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Thermal Performance:
iEB48017A120V-000 through -007: 12V, 17A Output
18
18
16
16
14
14
12
12
10
NC
10
8
8
6
4
2
0
NC
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
2.0 m/s (400 LFM)
Tc MAX
0.5 m/s (100 LFM)
1.0 m/s (200 LFM)
2.0 m/s (400 LFM)
Tc MAX
6
4
2
0
25 35 45 55 65 75 85 95 105 115 125
25 35 45 55 65 75 85 95 105 115 125
Temperature (oC)
Temperature (oC)
iEB48017A120V-000 maximum output current vs. ambient
temperature at nominal input voltage for airflow rates natural
convection (60lfm) to 400lfm with airflow from pin 3 to pin 1.
iEB48017A120V-000 maximum output current vs. ambient
temperature at nominal input voltage for airflow rates natural
convection (60lfm) to 600lfm with airflow from output to input.
1.3
1.2
1.1
1.0
0.9
0.8
0.7
35
40
45
50
55
60
Input Voltage (V)
iEB48017A120V-000 thermal measurement location –
top view
iEB48017A120V-000 typical current derating versus
line voltage with airflow = 1m/s (200lfm) and load
current greater than 4A.
Both the thermal curves provided and the example given above are based upon measurements made in TDK Innoveta’s
experimental test setup that is described in the Thermal Management section. Due to the large number of variables in
system design, TDK Innoveta recommends that the user verify the module’s thermal performance in the end application.
The critical component should be thermo coupled and monitored, and should not exceed the temperature limit specified in
the derating curve above. It is critical that the thermocouple be mounted in a manner that gives direct thermal contact or
significant measurement errors may result. TDK Innoveta can provide modules with a thermocouple pre-mounted to the
critical component for system verification tests.
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
to the airflow direction can have a significant
Thermal Management:
impact on the module’s thermal
performance.
An important part of the overall system
design process is thermal management;
thermal design must be considered at all
Thermal Derating: For proper application of
the power module in a given thermal
levels to ensure good reliability and lifetime
environment, output current derating curves
of the final system. Superior thermal design
are provided as a design
Adjacent PCB
and the ability to operate in severe
application environments are key elements
of a robust, reliable power module.
Module
Centerline
A finite amount of heat must be dissipated
from the power module to the surrounding
environment. This heat is transferred by the
three modes of heat transfer: convection,
conduction and radiation. While all three
modes of heat transfer are present in every
application, convection is the dominant mode
of heat transfer in most applications.
A
I
R
F
L
12.7
(0.50)
O
W
However, to ensure adequate cooling and
proper operation, all three modes should be
considered in a final system configuration.
76 (3.0)
AIRFLOW
The open frame design of the power module
provides an air path to individual
components. This air path improves
convection cooling to the surrounding
environment, which reduces areas of heat
concentration and resulting hot spots.
Air Velocity and Ambient
Temperature
Measurement Location
Air Passage
Centerline
Test Setup: The thermal performance data
of the power module is based upon
Wind Tunnel Test Setup Figure Dimensions are
in millimeters and (inches).
measurements obtained from a wind tunnel
test with the setup shown in the wind tunnel
figure. This thermal test setup replicates the
typical thermal environments encountered in
most modern electronic systems with
distributed power architectures. The
electronic equipment in networking, telecom,
wireless, and advanced computer systems
operates in similar environments and utilizes
vertically mounted PCBs or circuit cards in
cabinet racks.
guideline on the Thermal Performance
section for the power module of interest.
The module temperature should be
measured in the final system configuration to
ensure proper thermal management of the
power module. For thermal performance
verification, the module temperature should
be measured at the component indicated in
the thermal measurement location figure on
the thermal performance page for the power
module of interest. In all conditions, the
power module should be operated below the
maximum operating temperature shown on
the derating curve. For improved design
margins and enhanced system reliability, the
power module may be operated at
The power module, as shown in the figure, is
mounted on a printed circuit board (PCB)
and is vertically oriented within the wind
tunnel. The cross section of the airflow
passage is rectangular. The spacing
between the top of the module and a parallel
facing PCB is kept at a constant (0.5 in).
The power module’s orientation with respect
temperatures below the maximum rated
operating temperature.
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Heat transfer by convection can be
enhanced by increasing the airflow rate that
the power module experiences. The
Remote On/Off: - The power modules have
an internal remote on/off circuit. The user
must supply an open-collector or compatible
switch between the Vin(-) pin and the on/off
pin. The maximum voltage generated by
the power module at the on/off terminal is
15V. The maximum allowable leakage
current of the switch is 50uA. The switch
must be capable of maintaining a low signal
Von/off < 1.2V while sinking 1mA.
maximum output current of the power
module is a function of ambient temperature
(TAMB) and airflow rate as shown in the
thermal performance figures on the thermal
performance page for the power module of
interest. The curves in the figures are shown
for natural convection through 2 m/s (400
ft/min). The data for the natural convection
condition has been collected at 0.3 m/s (60
ft/min) of airflow, which is the typical airflow
generated by other heat dissipating
components in many of the systems that
these types of modules are used in. In the
final system configurations, the airflow rate
for the natural convection condition can vary
due to temperature gradients from other heat
dissipating components.
The standard on/off logic is positive logic.
The power module will turn on if terminal 2 is
left open and will be off if terminal 2 is
connected to terminal 3. If the positive logic
circuit is not being used, terminal 2 should
be left open.
An optional negative logic is available. The
power module will turn on if terminal 2 is
connected to terminal 3, and it will be off if
terminal 2 is left open. If the negative logic
feature is not being used, terminal 2 should
be shorted to terminal 3.
Operating Information:
Over-Current Protection: The power
modules have current limit protection to
protect the module during output overload
and short circuit conditions. During overload
conditions, the power modules may protect
themselves by entering a hiccup current limit
mode. The modules will operate normally
once the output current returns to the
specified operating range
Vin (+)
On/ Off
Vin(-)
Thermal Protection: When the power
modules exceed the maximum operating
temperature, the modules may turn off to
safeguard the power unit against thermal
damage. The module will auto restart as the
unit is cooled below the over temperature
threshold.
On/Off Circuit for positive or negative
logic
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
EMC Considerations: TDK Innoveta power
modules are designed for use in a wide
variety of systems and applications. For
assistance with designing for EMC
compliance, please contact TDK Innoveta
technical support.
automated final test. The MTBF is
calculated to be greater than 3.9M hours at
full output power and Ta = 40˚C using the
Telcordia SR-332 calculation method.
Improper handling or cleaning processes can
adversely affect the appearance, testability,
and reliability of the power modules. Contact
TDK Innoveta technical support for guidance
regarding proper handling, cleaning, and
soldering of TDK Innoveta’s power modules.
Input Impedance:
The source impedance of the power feeding
the DC/DC converter module will interact
with the DC/DC converter. To minimize the
interaction, a 33-100uF input electrolytic
capacitor should be present if the source
inductance is greater than 2uH.
Quality:
TDK Innoveta’s product development
process incorporates advanced quality
planning tools such as FMEA and Cpk
analysis to ensure designs are robust and
reliable. All products are assembled at ISO
certified assembly plants.
Reliability:
The power modules are designed using TDK
Innoveta’s stringent design guidelines for
component derating, product qualification,
and design reviews. Early failures are
screened out by both burn-in and an
Input/Output Ripple and Noise Measurements:
12uH
1
2
Battery
+
+
RLoad
Cext
Vinput
-
Voutput
-
33uF
220uF
esr<0.1
100KHz
esr<0.7
100KHz
Ground Plane
The input reflected ripple is measured with a current probe and oscilloscope. The ripple
current is the current through the 12uH inductor.
The output ripple measurement is made approximately 9 cm (3.5 in.) from the power module
using an oscilloscope and BNC socket. The capacitor Cext is located about 5 cm (2 in.) from
the power module; its value varies from code to code and is found on the electrical data page
for the power module of interest under the ripple & noise voltage specification in the Notes &
Conditions column.
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Advance Data Sheet: FReta iEB Series –Single Output Eighth Brick Bus Converter
Safety Considerations:
When the supply to the DC-DC converter is
less than 60Vdc, the power module meets
all of the requirements for SELV. If the
input voltage is a hazardous voltage that
exceeds 60Vdc, the output can be
considered SELV only if the following
conditions are met:
Check with TDK Innoveta for the current
status of safety approval on the iEB product
family.
For safety agency approval of the system in
which the DC-DC power module is installed,
the power module must be installed in
compliance with the creepage and clearance
requirements of the safety agency. The
isolation is basic insulation. For
1) The input source is isolated from the
ac mains by reinforced insulation.
2) The input terminal pins are not
accessible.
applications requiring basic insulation, care
must be taken to maintain minimum
creepage and clearance distances when
routing traces near the power module.
3) One pole of the input and one pole
of the output are grounded or both
are kept floating.
4) Single fault testing is performed on
the end system to ensure that under
a single fault, hazardous voltages
do not appear at the module output.
As part of the production process, the power
modules are hi-pot tested from primary and
secondary at a test voltage of 1500Vdc.
Warranty:
To preserve maximum flexibility, the power
modules are not internally fused. An
external input line normal blow fuse with a
maximum value of 10A is required by safety
agencies. A lower value fuse can be
selected based upon the maximum dc input
current and maximum inrush energy of the
power module.
TDK Innoveta’s comprehensive line of
power solutions includes efficient, high-
density DC-DC converters. TDK Innoveta
offers a three-year limited warranty.
Complete warranty information is listed on
our web site or is available upon request
from TDK Innoveta.
Information furnished by TDK Innoveta is believed to be accurate and reliable. However, TDK Innoveta assumes no
responsibility for its use, nor for any infringement of patents or other rights of third parties, which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of TDK Innoveta. TDK Innoveta components
are not designed to be used in applications, such as life support systems, wherein failure or malfunction could result in injury
or death. All sales are subject to TDK Innoveta’s Terms and Conditions of Sale, which are available upon request.
3320 Matrix Drive Suite 100
Richardson, Texas 75082
Phone (877) 498-0099 Toll Free
(469) 916-4747
Fax
(877) 498-0143 Toll Free
(214) 239-3101
Specifications are subject to change without notice.
is a trademark or registered trademark of TDK Corporation.
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