FEATURES
•
•
•
•
•
•
•
•
–55°C to +125°C
12 to 40 VDC input
Sync on HUM-70
Reduce hold-up
capacitance by 80%
Powers DC/DC converters
with 28 Vin nominal
Hold-up time
HUM-40 15 µs/µF
HUM-70 8.6 µs/µF
Low power flag
Inhibit function
HOLD UP MODULE
28 VOLT INPUT
HUMMER MODULE
40 OR 70 WATTS
MODELS
POWER OUTPUT
HUM-40
40 watts
HUM-70
70watts
Size (max.): HUM-40, non flanged, Case F2
1.950 x 1.350 x 0.415 inches (49.53 x 34.29 x 10.54 mm)
HUM-40, flanged, Case J2
2.720 x 1.350 x 0.415 inches (69.09 x 34.29 x 10.54 mm)
HUM-70 Case U1
1.505 x 3.005 x 0.400 inches (38.23 x 76.33 x 10.16 mm)
See Section B8, cases F2, J2, and U1, for dimensions.
Weight:
HUM-40 50 grams max. (flanged 60 grams typical)
HUM-70 70 grams max.
Screening: Standard or ES. See Section C2 for screening option and Section A5
for ordering information.
DESCRIPTION
Interpoint’s HUMMER™ Hold-Up Module Series provides a single
product solution to the problem of maintaining electronic system
operation during input power drop-out, typically reducing bulk
capacitance requirements by more than 80%. The HUMMER
module is compatible with the Interpoint DC/DC converters in
Section B1 that have a 28 VDC nominal input and a high input line
of 40 VDC.
The traditional procedure for providing hold-up during power loss is
to buffer the device with enough bulk capacitance to allow a
controlled shutdown to occur or an alternative power source to be
brought on line. The problem with this approach is that very large
capacitor banks are required because the capacitors are charged at
the relatively low voltage at which power fails.
GENERAL OPERATION
The HUMMER module and two external components (a hold-up
capacitor and a diode) are connected between the line source and
the DC/DC converter as shown in Figure 3 (HUMMER Module
System Block Diagram.) If an EMI filter is employed, the HUMMER
module is connected between the filter and the converter). The
module first charges the external capacitor to 40 volts, and then
allows the converter to operate off the line voltage. When the line
voltage drops to between 12 to 18 VDC, a boost converter in the
module supplies an output at the capacitor charging voltage (40
VDC). If power fails (the input voltage drops below 12 VDC), the
converter is powered from the external hold-up capacitor.
The HUMMER Hold-Up Module provides an alternative with two
important advantages: 1) it effectively reduces the low line voltage
for normal DC/DC converter operation to 12 VDC thereby reducing
power drop-out events, and 2) it charges hold-up capacitors to 40
volts, reducing the capacitance needed to produce a given hold-up
time.
®
1
HUMMER SERIES
40 OR 70 WATTS
HOLD UP MODULE
ABSOLUTE MAXIMUM RATINGS
SYNC AND INHIBIT
Sync (HUM-70 only)
• Range 525 min to 625 max kHz
• Duty cycle 40% min to 60% max
• Logic low 0.8V, max
• Logic high 4.5 V, min
• Referenced to input common
• If sync is not used, leave unconnected
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage 0.8 V max
Inhibit pin current 15 mA
• Referenced to input common
• Logic high (output enabled)
Open circuit voltage 10 V typical
Output Power
• HUM-40 40 watts
* HUM-70 70 watts
Input Voltage Range
• 12 to 50 continuous
• 80 V for up to 50 ms
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +135°C
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 12 to 40 VDC continuous
Case Operating Temperature (Tc)
• –55 to +125°C full power
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
HUM-40
PARAMETER
OUTPUT VOLTAGE
OUTPUT POWER
INPUT VOLTAGE
INPUT RIPPLE CURRENT
INPUT CURRENT
EFFICIENCY
HOLD-UP TIME
HUM-70
CONDITION
MIN
MAX
MIN
MAX
UNITS
CEXT TERMINAL
39
40
39
40
VDC
CONTINUOUS
—
40
—
70
PEAK, 2 SEC
—
60
—
100
W
CONTINUOUS
12
50
12
50
TRANSIENT 50 ms
—
80
—
80
V
2 MHz Bandwidth
—
100
—
100
mA p-p
VIN = 28V, VCS OPEN
—
90
—
90
VIN = 28V, INHIBITED
—
10
—
10
VIN = 12V, FULL LOAD
—
4.6
—
8.6
VIN = 40V, FULL LOAD
92
—
92
—
VIN = 22V, FULL LOAD
87
—
87
—
VIN = 12V, FULL LOAD
80
—
80
—
VDC
mA
A
%
FULL LOAD
15
—
8.6
—
µs/µF
POWER FAIL
HIGH, OPEN CIRCUIT
14.0
14.5
14.0
14.5
VDC
FLAG THRESHOLD
LOW, SHORT RETURN
11.5
12.0
11.5
12.0
CAPACITOR VOLTAGE
OPEN
22
24
22
24
CONTROLLED SWITCH
CLOSED
18
19
18
19
CAP CHARGED
HIGH, OPEN CIRCUIT
34
36
34
36
FLAG THRESHOLD
LOW, SHORT RETURN
19.5
20.5
19.5
20.5
VDC
VDC
Notes
1. Full load for specifications is 40 W for HUM-40 and 70 W for HUM-70.
®
2
HOLD UP MODULE
HUMMER SERIES
40 OR 70 WATT
PIN OUT
Pin
1
2
3
4
5
6
7
8
9
10
11
12
HUM-40 (40 Watt)
2
3
4
10
12
1
5
BOTTOM VIEW
HUM-40
FLANGED AND NON-FLANGED
See Section B8, cases F2,
and J2, for dimensions.
9
8
7
Sync
Cap Charged Flag
Inhibit
Power Fail Flag
No connection
No connection
VCS (Voltage Control Switch)
+ CEXT (Ext. Capacitor, Positive)
CEXT Return (Ext. Capacitor, Return)
Input Common
Positive Input
No connection
Angled corner indicates pin one.
Dot on top of cover indicates pin one.
1
HUM-70 (70 Watt)
No connection
VCS (Voltage Control Switch)
+ CEXT (Ext. Capacitor, Positive)
CEXT Return (Ext. Capacitor, Return)
Input Common
Positive Input
Case Ground
Cap Charged Flag
Inhibit
Power Fail Flag
N/A
N/A
2
3
4
6
TOP VIEW
HUM-70
(Pin side, marked side)
See Section B8, case U1, for dimensions.
11
10
9
5
8
6
7
Dotted line outlines flanged package option.
FIGURE 1: HUM-40 PIN OUT
FIGURE 2: HUM-70 PIN OUT
MODEL NUMBERING KEY
HUM - 40
F
/
Base Model
Output Power
Case Option
(Non-flanged case has no designator in
this position)
ES
HUM - 70 / ES
Base Model
Output Power
Screening
(Standard screening has no designator
in this position.)
Screening
(Standard screening has no designator
in this position.)
®
3
HOLD UP MODULE
HUMMER SERIES
40 OR 70 WATT
DC-DC
CONVERTER
LOAD
28 VDC
HUMMER
VCS
HOLD-UP
MODULE CAPACITOR
+VIN
EMI
FILTER
(IF USED)
28 VDC
RETURN
+VIN
INHIBIT
CHARGED
VIN
RETURN
+CEXT
CASE
GROUND
CEXT
RETURN
+VOUT
VOUT
RETURN
CEXT1
VIN RETURN
POWER
FAIL
1. EXTERNAL HOLDUP
CAPACITOR
INHIBIT
FIGURE 3: HUMMER MODULE SYSTEM BLOCK DIAGRAM
DETAILED OPERATIONAL DESCRIPTION
The detailed operation of the HUMMER module is divided into 4
operations: Initialization and Charging, Normal Operation, Low
Line Operation, and Power Fail Operation. For details, refer to the
following text, Figure 4 (HUMMER Module Block Diagram) and
Figure 5 (HUMMER Module Signal Diagram).
1. INITIALIZATION AND CHARGING
As the input voltage ramps up to 8 to 10 volts, the internal
HUMMER module circuits are biased to provide correct output
states on all flags. As the input reaches 14 VDC, the Power Fail
flag (active low) is released, the voltage control switch (VCS) is
closed, and the module begins operating in a boost mode to
charge the external capacitor to 40 volts. At this point, if the recommended connection has been made between the Capacitor
Charged pin and the inhibit pin of the converter as shown in Figure
3, all of the module energy is dedicated to charging the capacitor
and the converter will be inhibited until the capacitor charge
reaches 36 V. If this connection has not been made, the energy
available to charge the capacitor will be the difference between the
current required by the converter’s load and the current capacity of
the HUMMER module.
Note: The HUMMER module is rated at a total operating power
more than its output rating in order to allow it to both deliver a
full load and to continue charging the external capacitor (the
HUM-40, for example, is rated at 40 W output and 60 W total
operating power, allowing it to deliver 40 W to a load and charge
a capacitor at 10 to 20 J/sec). However, if the input voltage
ramps up slowly into a full converter load, the total power drawn
at low voltage could send the module into current limit which
would shut the unit down.
When the input voltage reaches approximately 22 VDC, the VCS
is opened, isolating the stored charge on the external capacitor
and allowing the converter to operate directly from the input power
bus via the external system diode (unless the converter is still
inhibited by the connection between the Capacitor Charged pin
and converter’s inhibit pin) while the capacitor continues to charge.
When the charge on the external capacitor reaches approximately
35 volts (80% of a full charge), the Capacitor Charged flag will be
asserted (removing the inhibit from the converter if applicable) and
the HUMMER module will be in normal operation.
VCS
+VIN
INPUT
CURRENT
LIMIT
+CEXT
+
–
PWM
VIN
RETURN
CASE
GROUND
+
+
–
–
CEXT
RETURN
CURRENT
SENSE
POWER
FAIL
INHIBIT CAPACITOR
CHARGED
FIGURE 4: HUMMER MODULE BLOCK DIAGRAM
®
4
HOLD UP MODULE
HUMMER SERIES
40 OR 70 WATTS
2. NORMAL OPERATION
3. LOW LINE OPERATION
Normal operation continues with the capacitor charged and the
input line voltage between 18 and 40 VDC. During this time, the
converter will operate from the line voltage through the external
diode. When the external capacitor reaches its final charge of 40
volts, the HUMMER module enters an idle state, consuming only
enough power to keep the capacitor charged. Idle state power for
the module is approximately 1 watt.
Low line operation occurs when the input voltage drops to a range
between 18 and 12 volts. When the voltage reaches 18 VDC, the
HUMMER module’s VCS closes and then operates in a boost
mode. In this mode, the HUMMER module supplies 40 VDC
through VCS to the converter, and at the same time maintains the
charge on the capacitor. The module will operate indefinitely in this
low line region until the input line voltage drops below 12 VDC.
Note: The HUMMER module itself can sustain continuous voltages
of up to 50 VDC and voltage spikes of 80 volts for up to 50
msec, and it will pass these voltages on to the converter through
the external bypass diode. If these ratings exceed the rating of
the converter, care should be taken to control the line voltage to
prevent damage to the converter.
4. POWER FAIL OPERATION
When the input line voltage drops to 12 VDC, the Power Fail flag
is asserted (pulled low) and the HUMMER module’s boost mode is
disabled. At this point, the converter load is powered by the stored
energy in the external capacitor. When the voltage on the external
capacitor falls to 20 VDC, the Capacitor Charged flag is released
(pulled low), indicating that 90% of the usable stored energy has
been depleted. If the connection has been made between the
Capacitor Charged pin and the converter’s Inhibit pin, the
converter will also be inhibited.
Normal Operation will continue indefinitely until the input voltage
drops below 18 VDC.
30 –
— VIN
VIN
= 22
20 –
10 –
— VIN
= 23
VIN = 19—
VIN = 19—
— VIN = 14
— VIN = 10
— VIN
= 12
0–
— VCAP
40 –
VIN
30 –
VCS
WITH
DIODE
— VCAP
VIN
20 –
VCS
CLOSED
10 –
VCS
CLOSED
RAMP
DOWN ON
EXT CAP
0–
40 –
— VCAP
VCAP = 35—
= 40
30 –
EXT
CAP
VCAP = 20—
20 –
10 –
0–
POWER
FAIL
OPEN
0–
V= 10 – FLAGS NOT ACTIVE
{
VIN = 12 – POWER FAIL FLAG
VIN = 18 – VCS CLOSES
VIN = 23 – VCS OPENS
{
VIN = 18 – VCS CLOSED
VCAP = 35 – CAP CHARGED
NORMAL
LOW
OPERATION LINE
OPERATION
{
INITIALIZATION &
CHARGING
{
{
VIN = 22–VCS OPENS
VIN = 10 – FLAGS ACTIVE
VIN = 14 – POWER FAIL FLAG
0–
VCAP= 20 – CAP CHARGED FLAG
CAP
CHARGED
NORMAL
OPERATION
POWER FAIL
OPERATION
FIGURE 5: HUMMER MODULE SIGNAL DIAGRAM
®
5
HUMMER SERIES
40 OR 70 WATT
HOLD UP MODULE
PIN CONNECTIONS
EXTERNAL CAPACITOR SELECTION
The external capacitor supplies the energy for the DC/DC
converter’s operation during power failure. Interpoint recommends
CLR-79 or CLR-81 wet slug tantalum capacitors because of their
high CV properties and extended temperature operation. An alternative choice is a high quality grade aluminum electrolytic. To
ensure maximum system stability, the capacitors should have a
minimum ESR of 0.25 ohms, a minimum capacitance of 330 uF, and
a maximum capacitance of 1 F.
The capacitance needed and derating required will depend on the
system requirements, the load, and the efficiency of the converter
being supplied power. The amount of capacitance for a given holdup time is determined by the formula
C=
2P∆t
2
n (V1 – V22)
INHIBIT FUNCTION
The HUMMER module’s inhibit pin disables the internal boost
converter when the Inhibit pin is pulled low. This is accomplished by
an external connection to the Vin Return pin or Vout Return pin. The
inhibit open circuit voltage is is 10 V and the short circuit current is
15 mA. It is open-collector TTL or CMOS compatible. The pin is
diode-isolated and can be reverse biased to include the input potential. Power Fail and Capacitor Charged flags are operable when the
unit is inhibited.
FLAG FUNCTIONS
where:
C is required capacitance (in Farads).
P is power to the load (output of converter) to be held up (in watts)
n is the efficiency of the converter at rated load (in %)
∆t is required hold-up time (in seconds)
V1is charged capacitor voltage (in volts)
V2is low-line voltage of DC/DC converter (in volts)
For a 50 msec hold-up of 30 W output from a converter with a efficiency of 80% and a 16 VDC low line and a 40 V capacitor charge:
C=
CAUTION: Do not connect the HUMMER module’s input return pin
to the Cext return. This connection will short the module’s current
limit sense resistor resulting in excessive currents that can also
damage the DC/DC converter.
(2) • (30) • (0.050)
3
= 2790 µF
; C=
(0.80) • (402 – 162)
1075.2
Note: The output power delivered by the HUMMER module to
deliver 30 W to the load with an 80% efficient converter is 37.5
watts. The HUM-40 is rated to deliver a maximum of 40 watts to
the input of the converter. Interpoint data sheets for individual
converters supply an efficiency curve vs. line and load for each
converter model. In calculations, assume the efficiency rating for
the nominal (usually 28 V) line condition.
Note: If the Capacitor Charged pin is connected to the converter’s
inhibit pin as shown in Figure 3, use 20 V as the low line figure in
the formula.
DIODE SELECTION AND CONNECTION
POWER FAIL FLAG
The Power Fail Flag output is implemented by a comparator monitoring the input voltage. (The comparator is also used to inhibit
HUMMER module’s operation; note however, that the flag is functional when the unit is inhibited.) The input voltage threshold is
nominally 14.5 V to indicate that sufficient voltage is present for
operation. The comparator output drives an internal MOSFET buffer
which connects to the external Power Fail pin. The buffer is of an
open drain configuration and requires an external pull-up resistor
and voltage for indication. The maximum recommended pull-up
voltage is 36 V. The maximum short circuit should not exceed 10mA.
The buffer is protected by a shunt zener diode connected between
the drain and the Cext Return. In normal operation, the input voltage
exceeds the 14 V threshold and the output is high (open drain).
When the input voltage is below 12 V the output is low, and the
MOSFET conducts to the Return.
CAPACITOR CHARGED FLAG
A Capacitor Charged Flag is implemented by a comparator monitoring the HUMMER module’s +Cext terminal. The capacitor voltage
threshold is 36 V, at which point the external capacitor is charged to
80% of its maximum value. When the capacitor discharges, the flag
resets at 20 VDC indicating that approximately 10% of the charge
remains. The comparator output drives a MOSFET buffer amplifier,
and the buffer output connects to the Cap Charged pin. The buffer
is of an open drain configuration and requires a pull-up resistor and
voltage for indication. The maximum recommended pull-up voltage
is 36 V. The maximum short circuit current should not exceed 10
mA. During normal operation, the input is 40 V, exceeding the
threshold, and the output is high (open circuit). When the capacitor
voltage is below 20 V, the output is low, and the MOSFET conducts
to the Return. The HUMMER module must be supplied with a
minimum of 8 VDC for biasing internal circuits to obtain correct
output states.
An external diode is required for system operation as shown in
Figure 3, with the diode anode connected to the HUMMER module’s
VCS pin and the DC/DC converter’s +V in pin. This diode supplies
input voltage to the converter when the internal voltage control
switch (VCS) is open. The diode should be selected with a minimum
current rating of 5 A and a voltage breakdown rating of 50 V or
greater (similar to Motorola MDR1060 or equivalent).
6
HUM 268621 Rev B
All technical information is believed to be accurate, but no responsibility is
assumed for errors or omissions. Interpoint reserves the right to make changes in
products or specifications without notice. HUMMER is a trademark of Interpoint.
Copyright © 1994 - 2003 Interpoint Corporatation. All rights reserved.
®
CASES
CASE F
Dot on top of case indicates pin one
CASE F
BOTTOM VIEW
See Figures 20 - 23 for pin configuration
Materials
Header Case F1
Cold Rolled Steel/Nickel/Gold
Cases F2 - F4
Cold Rolled Steel/Nickel/Tin
Cover Case F1
Kovar/Nickel
Cases F2 - F4
Cold Rolled Steel/Nickel/Tin
Pins
#52 alloy (all cases)
MHV Series Triple – compression glass seal
MTR Series Triple, case F1 – ceramic seal
MTR Series Triple, case F2 – compression glass seal
HUM40 – compression glass seal or ceramic seal
Case F3 – compression glass seal
Case F4 – compression glass seal or ceramic seal
1.350 max
(34.29)
1.950 max
(49.53)
CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300°C for 10 seconds
per pin.
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.2) for two decimal places
unless otherwise specified
FIGURE 19: CASE F MAXIMUM DIMENSIONS
BOTTOM VIEW CASE F1
MTR Series Triple and MHV Series Triple: Screening – Standard, ES, or 883
Platform
Bathtub
Dot on top of case indicates pin one
Seam Seal
1.170
(29.72)
0.040 dia.
(1.02)
1
2
3
4
5
10
9
8
7
6
MTR
Series
MHV
Series
0.170
(4.32)
1.770
(44.96)
1.370
(34.80)
0.970
(24.64)
0.570
(14.48)
0.170
(4.32)
0.000
0.25 (6.4)
0.000
0.25 (6.4)
0.405 max
(10.29)
0.000
0.405 max
(10.29)
0.000
FIGURE 20: CASE F1
Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer
to the numerical dimensions for accuracy.
B8-12
CASES
CASE F
BOTTOM VIEW CASE F2
HUM-40: Screening – Standard or ES
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.170
(29.72)
1
2
3
4
5
10
9
8
7
6
0.040 dia.
(1.02)
Solder Tip-off
0.170
(4.32)
1.770
(44.96)
1.370
(34.80)
0.970
(24.64)
0.570
(14.48)
0.170
(4.32)
0.000
0.250/0.300
(6.35/7.62)
0.000
0.415 ±0.015
(10.54 ±0.38)
0.000
FIGURE 21: CASE F2
BOTTOM VIEW CASE F3
MRH Series: Screening – Standard or ES
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.170
(29.72)
1
2
3
4
5
10
9
8
7
6
0.040 dia.
(1.02)
Solder Tip-off
0.170
(4.32)
1.770
(44.96)
1.370
(34.80)
0.970
(24.64)
0.570
(14.48)
0.170
(4.32)
0.000
0.250/0.300
(6.35/7.62)
0.000
0.455 max
(11.56 )
0.000
FIGURE 22: CASE F3
B8-13
CASES
CASE J
Dot on top of case indicates pin one
CASE J
BOTTOM VIEW
See Figures 36 - 40
for pin configuration
1.350 max
(34.29)
2.720 max
(69.09)
Flange Thickness:
Cases J1 and J5
Case J2
Cases J3 and J4
0.060 (1.52)
0.073 (1.85) max
0.067 +0.005/-0.007 (1.70 +0.13/-0.8)
Materials
Header Case J1
Cold Rolled Steel/Nickel/Gold
Cases J2 - J5
Cold Rolled Steel/Nickel/Tin
Cover Case J1
Kovar/Nickel
Case J2 - J5
Cold Rolled Steel/Nickel/Tin
Pins
#52 alloy (all cases)
Case J1
MHV Series Triple – compression glass seal
MTR Series Triple – ceramic seal
Cases J2 - J5
compression glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.2) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300°C for 10 seconds
per pin.
FIGURE 35: CASE J MAXIMUM DIMENSIONS
Note: Although every effort has been made to render the case drawings at actual size, variations in the printing process may cause some distortion. Please refer
to the numerical dimensions for accuracy.
B8-22
CASES
CASE J
BOTTOM VIEW CASE J2
Flanged case: Designator required in Case Option position of model number.
HUM-40 Module: Screening – Standard or ES
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.173
(29.79
1
0.040 dia.
(1.02)
2
0.673
(17.09)
3
4
5
7
6
0.162
(4.11)
HUM-40 Module
Solder Tip-off
10
0.173
(4.39)
9
8
1.980
(50.29)
1.770
(44.96)
1.370
(34.80)
0.970
(24.64)
0.570
(14.48)
0.170
(4.32)
0.000
0.210
(5.33)
0.25 (6.4)
0.000
0.415 max
(10.54)
0.000
FIGURE 37: CASE J2
BOTTOM VIEW CASE J3
Flanged case: Designator required in Case Option position of model number.
MRH Series: Screening – Standard or ES
Squared corner and dot on top
of case indicate pin one.
Solder Seal
1.173
(29.79
1
0.040 dia.
(1.02)
2
3
4
5
0.162 dia
(4.11)
0.673
(17.09)
9
8
7
6
1.770
(44.96)
10
0.173
(4.39)
1.370
(34.80)
Solder Tip-off
FIGURE 38: CASE J3
B8-24
1.980
(50.29)
0.970
(24.64)
0.570
(14.48)
0.170
(4.32)
0.000
0.210
(5.33)
0.25 (6.4)
0.000
0.455 max
(11.56)
0.000
CASES
CASE U
Angled corner indicates pin one
1.505 max (38.23)
CASE U
TOP VIEW
(PIN SIDE)
See Figures 55 and 56 for dimensions
3.005 (76.33) max.
Note: Pins are shown for Case U1.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
Pins
#52 alloy/Gold
compression glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.2) for two decimal places
unless otherwise specified
CAUTION
Heat from reflow or wave soldering may damage
the device. Solder pins individually with heat
application not exceeding 300°C for 10 seconds
per pin.
FIGURE 54: CASE U MAXIMUM DIMENSIONS
B8-36
CASES
CASE U
TOP VIEW CASE U1
MFL Series and MHP Series: Screening – Standard, ES or 883
MFLHP Series, FMD270 EMI Filter, and FMD28-461SL EMI Filters:
Screening – Standard or ES
SMFL, SMFLHP, SMHP, and SSP Series; SFCS, and SFME EMI Filters:
Screening – Standard, Class H or K
HUM70 Module and LCM Module: Screening – Standard or ES
Seam Seal
Angled corner
indicates pin one.
0.23 (5.8) Lead Length
0.128 dia
(3.25).
1.505 (38.23) max.
0.040 dia
(1.02)
1.380 (35.05)
1.250 (31.75)
1
12
1.050 (26.67)
2
11
0.850 (21.59)
3
10
0.650 (16.51)
4
9
0.450 (11.43)
5
8
0.250 (6.35)
6
7
0.220 (5.59
0.050 (1.27)
0.000
0.400 (10.16) max.
2.880 (73.15)
3.005 (76.33) max.
2.750 (69.85)
0.000
0.120 (3.05)
0.250 (6.35)
0.120 (3.05)
0.000
FIGURE 55: CASE U1
B8-37
QA SCREENING
125°C PRODUCTS
125°C PRODUCTS
TEST (125°C Products)
STANDARD
/ES
/883 (Class H)*
PRE-CAP INSPECTION
Method 2017, 2032
yes
yes
yes
TEMPERATURE CYCLE (10 times)
Method 1010, Cond. C, -65°C to 150°C
Method 1010, Cond. B, -55°C to 125°C
no
no
no
yes
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
Method 2001, 500 g
no
no
no
yes
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
96 hours at 125°C case (typical)
no
no
no
yes
yes
no
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C
Subgroups 1 and 4: +25°C case
no
yes
no
yes
yes
no
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
Gross Leak, Method 1014, Cond. C
Gross Leak, Dip (1 x 10-3)
no
no
yes
yes
yes
no
yes
yes
no
FINAL VISUAL INSPECTION
Method 2009
yes
yes
yes
Test methods are referenced to MIL-STD-883 as determined by MIL-PRF-38534.
*883 products are built with element evaluated components and are 100% tested and guaranteed over
the full military temperature range of –55°C to +125°C.
Applies to the following products (some models do not offer “883” screening, please refer to the individual
series datasheets to determine what screening is available):
MOR Series
MHD Series
MGH Series
FMGA EMI Filter
MFLHP Series
MHV Series
MCH Series
FMSA EMI Filter
MFL Series
MHF+ Series
FM-704A EMI Filter
HUM Modules
MHP Series
MHF Series
FMD/FME EMI Filter
LCM Modules
MTR Series
MGA Series
FMC EMI Filter
LIM Modules
MQO Series
MSA Series
FMH EMI Filter
C2-10