Interpoint MHF2805DF/883 Dc/dc converters 28 volt input Datasheet

FEATURES
•
•
•
•
•
•
•
•
•
•
•
DC/DC CONVERTERS
28 VOLT INPUT
–55° to +125°C operation
16 to 40 VDC input
Fully isolated
Optocoupler feedback
Fixed frequency, 550 kHz typical
Topology – Single Ended Forward
50 V for up to 50 ms transient protection
Inhibit and sync functions
Indefinite short circuit protection
Undervoltage lockout
Up to 84% efficiency, 28 W/in3
MHF+ SERIES
SINGLE & DUAL
15 WATT
MODELS
Size (max.): Non flanged 1.460 x 1.130 x 0.330 (37.08 x 28.70 x 8.38 mm)
Flanged 2.005 x 1.130 x 0.330 (50.93 x 28.70 x 8.38 mm)
Weight:
30 grams maximum.
Screening: Standard, ES, or 883 (Class H).
VDC OUTPUT
SINGLE
DUAL
3.3
±5
5
±12
5.2
±15
12
15
28
DESCRIPTION
The MHF+ Series™ of high frequency DC/DC converters offers a
wide input voltage range of 16 to 40 volts and up to 15 watts of
output power. The units are capable of withstanding short term transients up to 50 volts. The package is a hermetically sealed, welded
metal case. Flanged and non-flanged models are available.
CONVERTER DESIGN
The MHF+ converters are switching regulators that use a quasisquare wave, single-ended forward converter design with a constant
switching frequency of 550 kHz. Isolation between input and output
circuits is provided with a transformer in the forward path and a
temperature compensated optical link in the feedback control loop.
For the MHF+ dual output models, good cross regulation is maintained by tightly coupled output magnetics. Up to 90% of the total
output power (80% on 2805D) is available from either output,
providing the opposite output is simultaneously carrying 10% of the
total output power (20% on 2805D models). Predictable current limit
is accomplished by directly monitoring the output load current and
providing a constant current output above the overload point.
HIGHER POWER DENSITY
INHIBIT FUNCTION
MHF+ converters provide an inhibit terminal that can be used to
disable internal switching, resulting in no output and very low quiescent input current. The converter is inhibited when a TTL compatible
low (≤0.8 – output disabled) is applied to the inhibit pin. The unit is
enabled when the pin, which is internally connected to a pull-up
resistor, is left unconnected or is connected to an open-collector
gate. The open circuit output voltage associated with the inhibit pin
is 8.5 to 12 V. In the inhibit mode, a maximum of 4 mA must be sunk
from the inhibit pin.
SYNCHRONIZATION
A synchronization feature is included with the MHF+ Series that
allows the user to match the switching frequency of the converter to
the frequency of the system clock. An external synchronization
feature is included that allows the user to adjust the nominally 550
kHz operating frequency to any frequency within the range of 500
kHz to 600 kHz. This is initiated by applying a TTL compatible input
of the desired frequency to pin 5.
SHORT CIRCUIT PROTECTION
The MHF+ Series offers a new standard of performance for small
size and high power density. At just 0.33 inch high and a total footprint of 1.7 in2, this low profile package offers a total power density
of up to 28 watts per cubic inch.
MHF+ Series converters provide short circuit protection by
restricting the output current to approximately 115% of the full load
output current. The output current is sensed in the secondary stage
to provide highly predictable and accurate current limiting, and to
eliminate foldback characteristics.
LOW NOISE, HIGH AUDIO REJECTION
UNDERVOLTAGE LOCKOUT
The MHF+ converters’ feed-forward compensation system provides
excellent dynamic response and noise rejection. Audio rejection is
typically 50 dB. Typical output voltage response for a 50% to 100%
step load transient is as low as 1.3% with a 150 msec recovery time.
Input ripple current is typically 35 mA p-p with output ripple voltage
typically 30 mV p-p .
Undervoltage lockout prevents the units from operating below
approximately 12 VDC input voltage to keep system current levels
smooth, especially during initialization or re-start operations.
1
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATINGS
TYPICAL CHARACTERISTICS
SYNC AND INHIBIT
Input Voltage
• 16 to 40 VDC
Power Dissipation (Pd)
• 6W
Output Power
• 12 to 15 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
RECOMMENDED OPERATING CONDITIONS
Sync In (500 to 600 kHz)
• Duty cycle 40% to 60%
• Logic low 0.8 V max
• Logic high 4.5 V min, 5 V max
• Referenced to input common
• If not used, connect to input common
Inhibit TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V
Inhibit pin current 4.0 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector or unconnected
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
• 150 ppm/°C maximum
Input to Output Capacitance
• 60 pF typical
Undervoltage Lockout
• 12 V input typical
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 50 dB typical
Conversion Frequency (55°C to +125°C Tc)
• Free run 550 kHz typical
480 kHz min, 620 kHz max
Inhibit Pin Voltage (unit enabled)
• 8.5 to 12 V
Input Voltage Range
• 16 to 40 VDC continuous
• 50 V for up to 50 msec transient
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derating Output Power/Current (Tc)
• Linearly from 100% at 125°C to 0% at 135°C
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS
MHF+283R3S
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
CONDITION
VIN = 16 to 40 VDC
OUTPUT POWER
MIN
3.27
0
TYP MAX
3.30 3.33
—
2.4
TYP MAX
5.00 5.05
—
2.4
MHF+285R2S
MIN
5.16
0
TYP MAX
5.20 5.24
—
2.4
VIN = 16 to 40 VDC
0
—
8
0
—
12
0
—
12.48
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
10 kHz - 2 MHz
Tc = –55°C to +125°C
Vin = 16 to 40 VDC
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
—
—
—
—
16
—
30
50
5
20
28
—
80
120
100
50
40
50
—
—
—
—
16
—
30
60
5
20
28
—
80
100
50
50
40
50
—
—
—
—
16
—
30
60
5
20
28
—
50
100
35
35
40
50
INPUT CURRENT
NO LOAD
FULL LOAD
INHIBITED
10 kHz - 10 MHz
Tc = –55°C to +125°C
—
—
—
—
—
72
25
—
5
45
—
75
65
397
12
80
120
—
—
—
—
—
—
75
25
560
5
35
—
77
40
624
12
80
100
—
—
—
—
—
—
75
25
560
5
35
—
77
42
605
12
100
100
—
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT1
STEP LOAD RESP.
STEP LINE RESP.
START-UP
UNITS
VDC
A
W
mV p-p
mV
mV
VDC
V
mA
mA pp
%
SHORT CIRCUIT
POWER DISSIPATION
RECOVERY2
50% – 100% – 50%
TRANSIENT
RECOVERY2
—
—
5
7.5
8
30
—
—
3.5
7.5
6
30
—
—
3.5
7.5
6
30
W
ms
–400
—
150
150
500
300
–400
—
150
150
400
300
–400
—
150
150
400
300
mV pk
µs
16 – 40 – 16 VDC
TRANSIENT3
RECOVERY2
–800
—
550
0.8
800
1.2
–800
—
550
0.8
800
1.2
–800
—
550
0.8
800
1.2
mV pk
ms
DELAY
—
10
25
—
10
25
—
10
25
ms
OVERSHOOT4
—
200
300
—
100
600
—
100
600
mV pk
Notes
1. Indefinite short circuit protection not guaranteed above 125°C (case)
2. Recovery time is measured from application of the transient
to the point at which Vout is within regulation.
2
MHF+2805S
MIN
4.95
0
3. Input step transition time >10 µs.
4. Input step transition time <100 µs.
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
CONDITION
VIN = 16 to 40 VDC
OUTPUT POWER
MHF+2812S
MHF+2815S
MHF+2828S
MIN TYP MAX
11.88 12.00 12.12
0
— 1.25
MIN TYP MAX
14.85 15.00 15.15
0
— 1.00
MIN TYP MAX
27.72 28.00 28.28
0
— 0.54
UNITS
VDC
A
VIN = 16 to 40 VDC
0
—
15
0
—
15
0
—
15
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
10 kHz - 2 MHz
Tc = –55°C to +125°C
Vin = 16 to 40 VDC
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
—
—
—
—
16
—
30
50
5
20
28
—
80
120
50
50
40
50
—
—
—
—
16
—
30
50
5
20
28
—
80
120
50
50
40
50
—
—
—
—
16
—
60
100
50
50
28
—
120
180
150
150
40
50
INPUT CURRENT
NO LOAD
FULL LOAD
INHIBITED
10 kHz - 10 MHz
Tc = –55°C to +125°C
—
—
—
—
—
25
680
5
35
—
50
752
12
80
120
—
—
—
—
—
25
670
5
35
—
62
752
12
80
120
—
—
—
—
—
25
640
5
35
—
60
760
12
80
120
78
79
—
78
80
—
82
84
—
%
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT1
STEP LOAD RESP.
STEP LINE RESP.
START-UP
W
mV p-p
mV
mV
VDC
V
mA
mA pp
SHORT CIRCUIT
POWER DISSIPATION
RECOVERY2
50% – 100% – 50%
TRANSIENT
RECOVERY2
—
—
3.5
7.5
6
30
—
—
3.5
7.5
6
30
—
—
3.5
7.5
6
30
W
ms
–500
—
150
150
500
300
–600
—
200
150
600
300
–800
—
600
200
800
400
mV pk
µs
16 – 40 – 40 VDC
TRANSIENT3
RECOVERY2
–800
—
550
0.8
800
1.2
–800
—
550
0.8
800
1.2
–1200 1100 1200
—
0.8
1.2
mV pk
ms
25
0
10
25
0
200 1500
DELAY
0
10
OVERSHOOT4
0
200 1200
Notes
1. Indefinite short circuit protection not guaranteed above 125°C (case)
2. Recovery time is measured from application of the transient to point at
which Vout is within regulation.
0
10
25
ms
0
200
280
mV pk
3. Input step transition time >10 µs.
4. Input step transition time <100 µs.
3
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
DUAL OUTPUT MODELS
PARAMETER
MHF+2805D
CONDITIONS
OUTPUT VOLTAGE
MHF+2812D
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
+VOUT
4.95
5.00
5.05
11.88
12.00
12.12
14.85
15.00
15.15
–VOUT
4.92
5.00
5.08
11.82
12.00
1218
14.78
15.00
15.23
UNITS
VDC
OUTPUT CURRENT1
VIN = 16 to 40 VDC
—
±1.2
1.92
—
±0.625
1.125
—
±0.500
0.900
A
OUTPUT POWER1
VIN = 16 to 40 VDC
—
—
12
—
—
15
—
—
15
W
OUTPUT RIPPLE
VOLTAGE ±VOUT
10 kHz - 2 MHz
Tc = –55°C to +125°C
—
—
30
60
80
120
—
—
30
60
80
120
—
—
30
50
80
120
mV p-p
LINE REGULATION
BALANCED +VOUT
Vin = 16 to 40 VDC
LOAD REGULATION
—
5
50
—
5
50
—
5
50
–VOUT
—
—
80
—
—
100
—
—
100
BALANCED +VOUT
—
20
50
—
20
50
—
20
50
—
—
100
—
—
100
—
—
100
LOAD
LOAD
CROSS REGULATION2
–VOUT
mV
mV
NEGATIVE VOUT
—
6
7.5
—
3
6
—
3
6
%
CONTINUOUS
TRANSIENT 50 msec
NO LOAD
FULL LOAD
INHIBITED
10 kHz - 10 MHz
16
—
—
—
—
—
28
—
20
540
6
20
40
50
40
600
12
50
16
—
—
—
—
—
28
—
25
645
5
35
40
50
50
754
12
60
16
—
—
—
—
—
28
—
25
638
5
35
40
50
50
754
12
60
VDC
V
CURRENT
EFFICIENCY
Tc = –55°C to +125°C
—
77
40
79
80
—
—
76
50
83
100
—
—
76
50
84
100
—
LOAD FAULT
SHORT CIRCUIT3
POWER DISSIPATION
RECOVERY4
50% – 100% – 50%
+VOUT
TRANSIENT
–VOUT
—
—
3
7.5
6
30
—
—
3
7.5
6
50
—
—
3
7.5
6
50
–600
200
600
–600
300
600
–600
300
600
–600
150
600
–600
100
500
–600
100
600
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
INPUT RIPPLE
STEP LOAD RESP.5
BALANCED LOADS
STEP LINE RESP.
± VOUT
START-UP
mA
mA p-p
%
W
ms
mV pk
RECOVERY4
16 – 40 – 40 VDC
TRANSIENT6
—
150
500
—
200
400
—
200
500
µs
–800
600
800
–750
550
750
–750
550
750
mV pk
RECOVERY4
DELAY
OVERSHOOT7
—
—
0
0.8
12
100
1.2
20
250
—
—
0
0.8
12
200
1.2
25
750
—
—
0
0.8
12
200
1.2
25
750
ms
ms
mV pk
Notes
1. Up to 13.5 watts, 90% (9.6W, 80% for 2805D) of the total output power is
available from either output providing the opposite output is simultaneously
carrying 10% (20% for 2805D) of the total output power. Each
output must carry a minimum of 10% (20% for 2805D) of the total output
power in order to maintain regulation on the negative output.
2. Effect on –Vout for the following conditions:
+Po = 50% to 10% and –Po = 50%
+Po = 50% and –Po = 50% to 10%
4
MHF+2815D
MIN
3. Indefinite short circuit protection not guaranteed above 125°C (case)
4. Recovery time is measured from application of the transient to point at
which Vout is within regulation.
5. Response of either output with the opposite output held at half of the total
output power.
6. Input step transition time >10 µs.
7. Input step transition time <100 µs.
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
BLOCK DIAGRAM
5 µH
Positive
Input
Positive
Output
2 µF
Inhibit
PWM
Controller
ID
Limit
Ref.
IC
Output
Common
Input
Common
FIGURE 1: MHF+ SINGLE OUTPUT
5
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
PIN OUT
Pin
1
2
3
4
52
6
7
8
Single Output
(Except MHF+2828S)
Inhibit
No connection
Output Common
Positive Output
Sync
Case Ground
Input Common
Positive Input
MHF+2828S
Dual Output
Inhibit
Positive Output
(See note 1, below)
Output Common
Sync
Case Ground
Input Common
Positive Input
Inhibit
Positive Output
Output Common
Negative Output
Sync
Case Ground
Input Common
Positive Input
1. Pin 3 of MHF+2828S will provide 14 Vout referenced to output common (pin 4).
2. If Sync is not used, pin 5 should be connected to input common.
Dot on top of cover
indicates pin one.
1
2
3
4
5
BOTTOM VIEW
MHF+ SINGLE AND DUAL
NON-FLANGED OR FLANGED
8
7
6
Dotted line outlines flanged package option.
See pages 9 and 10 for dimensions.
FIGURE 2: PIN OUT
SMD NUMBERS
MODEL NUMBERING KEY
MHF+ 28 12 D
F / 883
Base Model
Input Voltage
Output Voltage
(R = decimal point, 3R3 = 3.3 Vout)
Number of Outputs
(S = single, D = dual)
Case Option
(Non-flanged case has no designator in
this position)
Screening
(Standard screening has no designator
in this position.)
6
STANDARD MICROCIRCUIT
DRAWING (SMD)
IN PROCESS
5962-9213901HXC
IN PROCESS
5962-9166401HXC
5962-9160101HXC
5962-9689801HXC
5962-9555901HXC
5962-9214401HXC
5962-9161401HXC
MHF+
SIMILAR PART
MHF+283R3S/883
MHF+2805S/883
MHF+285R2S/883
MHF+2812S/883
MHF+2815S/883
MHF+2828S/883
MHF+2805D/883
MHF+2812D/883
MHF+2815D/883
Flanged SMDs have the suffix HZC instead of HXC.
For exact specifications for an SMD product, refer to the SMD
drawing. Call your Interpoint representative for status on the
MHF+ SMD releases which are “in process”. SMDs can be
downloaded from
http://www.dscc.dla.mil/programs/smcr
DC/DC CONVERTERS
MHF+ SERIES
SINGLE AND DUAL
15 WATT
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
90
40V
28V
60
50
70
40V
60
50
2
4
6
8
10
40
12
2
OUTPUT POWER (Watts)
4
6
8
10
12
40
14 15
4
6
16V
EFFICIENCY (%)
EFFICIENCY (%)
28V
70
40V
60
28V
40
4
6
8
10
12
70
40V
60
28V
50
50
50
14 15
80
80
40V
12
90
16V
70
10
FIGURE 5
90
80
8
OUTPUT POWER (Watts)
MHF+2815S EFFICIENCY
16V
2
2
MHF+2812S EFFICIENCY
FIGURE 4
90
EFFICIENCY (%)
40V
28V
60
OUTPUT POWER (Watts)
FIGURE 3
40
70
50
MHF+2805S EFFICIENCY
60
16V
80
28V
EFFICIENCY (%)
EFFICIENCY (%)
EFFICIENCY (%)
80
70
40
90
16V
16V
80
40
2
4
6
8
10
12
14 15
2
4
6
8
10
12
14
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
OUTPUT POWER (Watts)
MHF+2805D EFFICIENCY
MHF+2812D EFFICIENCY
MHF+2815D EFFICIENCY
FIGURE 8
FIGURE 7
FIGURE 6
0
–30
–40
–50
VOUT
100% to 50%
100mV/div.
500mV/div.
–20
–60
50% to 100%
–70
20V/div.
ATTENUATION (dB)
–10
–80
–90
–100
0.1
1
10
FREQUENCY (kHz)
MHF+ SERIES AUDIO REJECTION
FIGURE 9
100
VIN
1ms/div
16V TO 40V
MHF+2805S STEP LINE RESPONSE
FIGURE 10
50µs/div
50%
100%
MHF+2805S STEP LOAD RESPONSE
FIGURE 11
7
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
20V/div.
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
200mV/div.
VIN
100mV/div.
100% to 10%
+VOUT
1V/div.
200µs/div
10% 100%
MHF+2805S STEP LOAD RESPONSE
VIN
2 ms/div
1 ms/div
16V TO 40V
MHF+2805S TURN-ON INTO FULL LOAD
MHF+2815D STEP LINE RESPONSE
FIGURE 14
FIGURE 13
FIGURE 12
100% to 50%
POUT= 12W
VOUT
20V/div.
10% to 100%
PO= 7.5 W
PO= 7.5 W
–VOUT
100mV/div.
100mV/div.
5V/div.
100% to 20%
+VOUT
20V/div.
20% to 100%
50% to 100%
50µs/div
50% 100%
MHF+2815D +VOUT STEP LOAD RESPONSE
50µs/div
20% 100%
MHF+2815D +VOUT STEP LOAD RESPONSE
FIGURE 15
VIN
2 ms/div
MHF+2815D TURN-ON INTO FULL LOAD
FIGURE 17
FIGURE 16
10
5
2812D
2815D
0
–5
–10
2805D
0
20
40
60
80
100
POSITIVE OUTPUT LOAD (% OF TOTAL LOAD)
–VOUT WITH SHIFT IN LOAD BALANCE
CROSS REGULATION
2805D
8
16
6
MHF+2805S&D
2812D
4
COND A
2
0
2815D
–2
COND B
–4
2812D
–6
–8
–10
INPUT VOLTAGE (Volts)
–VOUT VOLTAGE CHANGE (%)
–V OUT VOLTAGE CHANGE (%)
10
15
14
MHF+2812S&D
MHF+2815S&D
13
2805D
10
20
30
40
50
OUTPUT LOAD (%)
COND. A: 50% LOAD +V; 50% to 10% –V
COND. B: 50% LOAD –V; 50% to 10% +V
12
10
11
12
13
8
FIGURE 19
15
LOW LINE DROPOUT VS. LOAD
MHF+2805D/MHF+2812D/MHF+2815D
CROSS REGULATION
FIGURE 18
14
OUTPUT POWER (Watts)
50 mV DROP
FIGURE 20
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Squared corner and dot on top
of case indicate pin one.
CASE E
BOTTOM VIEW
See Figure 22
for pin configurations.
1.130 max
(28.70)
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
Cold Rolled Steel/Nickel/Gold)
Pins
#52 alloy/Gold
compression glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
1.460 max
(37.08)
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 21: CASE E MAXIMUM DIMENSIONS
BOTTOM VIEW CASE E1
MHF+ Series Single and Dual: Screening – Standard, ES, or 883
Seam Seal
Projection Weld
Squared corner and dot on top
of case indicate pin one.
0.960
(24.38)
1
2
3
4
5
0.030 dia.
(0.76)
0.205
(5.21)
0.000
0.25 (6.35)
0.000
0.330 max
(8.38)
0.25 (6.35)
0.000
0.330 max
(8.38)
7
6
0.505
(12.83)
0.705
(17.91)
0.905
(22.99)
1.105
(28.07)
8
0.160
(4.06)
0.000
FIGURE 22: CASE E1
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.
9
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Squared corner and dot on top
of case indicate pin one.
CASE G
BOTTOM VIEW
Flanged package
See Figure 24
for pin configuration
1.130 max
(28.70)
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover MHF+ Series and FMH Filter
Kovar/Nickel
SMHF
Cold Rolled Steel/Nickel
Pins
#52 alloy (all cases)
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
2.005 max
(50.93)
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.
Flange Thickness: 0.047 (1.19)
FIGURE 23: CASE G MAXIMUM DIMENSIONS
10
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
BOTTOM VIEW CASE G1
Flanged cases: Designator "F" required in Case Option position of model number
MHF+ Series Single and Dual: Screening – Standard, ES, or 883
Projection Weld
Squared corner and dot on top
of case indicate pin one.
0.960
(24.38)
1
4
5
0.128 dia
(3.25)
1.590 (40.39)
1.105 (28.07)
6
0.905 (22.99)
0.000
7
0.705 (17.91)
8
0.140 (3.56)
0.25 (6.35)
0.000
0.330 max.
(8.38)
0.25 (6.35)
0.000
3
0.560
(14.22)
0.160
(4.06)
0.000
0.330 max.
(8.38)
2
0.505 (12.83)
0.030 dia.
(0.76)
0.205 (5.21)
Seam Seal
FIGURE 24: CASE G1
11
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
TABLE 1: ENVIRONMENTAL SCREENING
TEST
STANDARD
/ES
/883 (Class H)*
yes
yes
yes
PRE-CAP INSPECTION
Method 2017, 2032
TEMPERATURE CYCLE (10 times)
Method 1010, Cond. C, -65°C to 150°C
no
no
yes
Method 1010, Cond. B, -55°C to 125°C
no
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
no
no
yes
Method 2001, 500 g
no
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
no
no
yes
96 hours at 125°C case (typical)
no
yes
no
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C
no
no
yes
Subgroups 1 and 4: +25°C case
yes
yes
no
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
no
yes
yes
Gross Leak, Method 1014, Cond. C
no
yes
yes
Gross Leak, Dip (1 x 10-3)
yes
no
no
yes
yes
yes
FINAL VISUAL INSPECTION
Method 2009
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.
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Email:
[email protected]
Interpoint UK
Phone: +44-1252-815511
Email:
[email protected]
12
21621-001-DTS Rev B This revision supercedes all previous releases.
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. MHF+ Series is a trademark of Interpoint.
Copyright © 1999-2000 Interpoint. All rights reserved.
Interpoint France
Phone: +33-134285455
Email:
[email protected]
FEATURES
•
•
•
•
•
•
•
•
•
•
•
–55° to +125°C operation
16 to 48 VDC input
Fully Isolated
Optocoupler feedback
Fixed frequency 450 kHz
Topology – Current Mode Flyback
Transient protection 80 V/120 ms
Inhibit and sync functions
Indefinite short circuit protection
Undervoltage lockout
Up to 76% efficiency
DC/DC CONVERTERS
28 VOLT INPUT
MHF+ SERIES TRIPLE
15 WATT
MODELS
VDC OUTPUT
TRIPLE OUTPUT
+5 and ±12
+5 and ±15
Size (max.): Non flanged, case E2, 1.460 x 1.130 x 0.330 inches (37.08 x 28.70 x 8.38 mm)
Flanged , case G2, 2.005 x 1.130 x 0.330 inches (50.93 x 28.70 x 8.38 mm)
See Figures 13 - 16 for dimensions.
Weight:
32 grams maximum.
Screening: Standard, ES, or 883 (Class H). See Table 1 for screening options.
DESCRIPTION
Interpoint’s MHF+ Series™ Triple DC/DC converters provide a wide
input voltage range of 16 to 48 VDC delivering 15 watts of total
output power with output voltages of +5 and ±12 or +5 and ±15
VDC. The main output, +5 VDC, will supply up to 7.5 watts and the
auxiliaries will supply up to 7.5 watts of combined power. Full power
operation at -55° C to +125°C plus the ability to withstand transients
of up to 80 V for up to 120 milliseconds make these converters an
ideal choice for your high reliability systems.
CONVERTER DESIGN
MHF+ Triple Series of DC/DC converters incorporate dual-phase,
phase-shifted technology with a continuous flyback topology. This
design eliminates a minimum load requirement on the main output
and eliminates cross regulation effects between the main output
voltage and the auxiliary output voltages. The phase-shifted design
offers a further benefit in reduced input and output ripple.
INHIBIT FUNCTION
An open collector, TTL compatible, inhibit terminal (pin 1) provides
shut-down and start-up control. Applying a logic level low (<0.8 V),
referenced to input common, will disable the output of the converter.
When inhibited input current is reduced to 5 mA or less and there is
no generation of switching noise. The inhibit terminal typically sinks
3 mA when the converter is inhibited.
Leaving the terminal open or pulling it high will enable the converter.
Use an open collector interface for logic high voltages of up to 11
volts. (Refer to Figure 2 for a connection diagram.) An open collector
interface is not required if the logic high is in excess of the open
circuit voltage of the inhibit terminal, 11 volts, but less than 40 volts.
SYNCHRONIZATION
To synchronize the converter’s switching frequency to a system
clock apply the clock signal to the sync terminal (pin 7). When
multiple converters are powered from a single power source, asynchronous (free run) operation will result in lower peak noise for
common spectral peaks, but synchronous operation will eliminate
any possibility of interference frequencies in the low audio band.
Source impedance of the signal should be less than 100 ohms and
the transition time should be less than 100 nanoseconds. The
capacitively coupled sync input will synchronize on a differential
signal of as low as 4 volts to as high as 10 volts. If the sync function
is not used, the terminal should be left open.
SHORT CIRCUIT PROTECTION
Internal current limiting circuitry protects all three outputs against
short circuits. When output power exceeds approximately 130% of
maximum output power, the output currents are limited. In addition,
separate current limiting circuitry protects each output individually
resulting in normal operation of either the main or the auxiliaries,
whichever is not in a shorted condition.
PACKAGING
MHF+ Triple converters are packaged in hermetically sealed metal
cases. MHF+ Triple converters can be purchased in a flanged or
non-flanged case. The flanged option provides increased heat dissipation and also provides greater stability when mechanically
secured.
SOFT START FEATURE
The soft-start feature provides a controlled 20 milliseconds turn-on
to minimize inrush current and reduce overshoot at initial start-up or
when inhibit is released.
1
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 48 VDC
Power Dissipation (Pd)
• 12 watts
Output Power
• 15 watts
Lead Soldering Temperature (10 sec per pin)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 48 VDC continuous
• 80 V for up to 120 msec
Case Operating Temperature (Tc)
• –55°C to +125°C full power
• –55°C to +135°C absolute
Derating Output Power/Current
• Linearly from 100% at 125°C to 0% at 135°C
SYNC AND INHIBIT
Sync 400 to 600 kHz
• Duty cycle 40% to 60%
• Logic low 0.8 V max
• Logic high 4.5 V min, 10.0 V max
• If not used, leave unconnected
• Referenced to input common
Inhibit: TTL Open Collector
• Logic low (output disabled)
Logic low voltage ≤0.8 V max
Inhibit pin current 3.0 typ, 5.0 max
• Referenced to input common
Logic high (output enabled)
Open collector
Unconnected or 11 to 40 V
0°
POSITIVE
INPUT
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 150 ppm/°C typical
Current Limit
• 130% typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• Free run 375 minimum, 500 kHz maximum
• External sync range 400 to 600 kHz
Inhibit Pin Voltage (unit enabled)
• 10 V typical
+5 OUTPUT
FEEDBACK ISOLATOR
PWM CM
CONTROLLER
OUTPUT
COMMON
INPUT
COMMON
FEEDBACK ISOLATOR
+ AUX.
OUTPUT
SYNC
PWM CM
CONTROLLER
180°
–AUX.
OUTPUT
FIGURE 1: BLOCK DIAGRAM
2
DC/DC CONVERTERS
MHF+ SERIES TRIPLE
15 WATT
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
MHF+28512T
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT1
OUTPUT POWER2
MHF+28515T
CONDITION
MIN
TYP
MAX
MIN
TYP
MAX
MAIN
4.95
5.0
5.05
4.925
5.0
5.05
+ AUXILIARY
11.64
12.0
12.36
14.55
15.0
15.45
– AUXILIARY
11.64
12.0
12.36
14.55
15.0
15.45
MAIN
0
—
1.5
0
—
1.5
+ AUXILIARY
—
—
0.416
—
—
0.333
– AUXILIARY
—
—
0.416
—
—
0.333
TOTAL
—
—
2.125
—
—
2.0
MAIN
—
—
7.5
—
—
7.5
+ AUXILIARY
—
—
5
—
—
5
– AUXILIARY
—
—
5
—
—
5
—
—
15
—
—
15
OUTPUT RIPPLE
10 kHz to 2 MHz
TOTAL
MAIN
—
20
75
—
20
75
VOLTAGE
10 kHz to 2 MHz
± AUXILIARY
—
30
90
—
30
112
LINE REGULATION3
MAIN
—
25
75
—
25
75
VIN = MIN. TO MAX.
±AUXILIARY
—
120
240
—
150
300
MAIN
—
25
60
—
25
60
± AUXILIARY
—
120
240
—
150
300
LOAD REGULATION3, 4
CROSS REGULATION5
INPUT VOLTAGE
INPUT CURRENT
INPUT RIPPLE CURRENT
STEP LOAD
RESPONSE3, 7, 8
START-UP3,
VDC
A
W
mV p-p
mV
mV
– AUXILIARY
—
—
1200
—
—
1500
mV
CONTINUOUS
16
28
48
16
28
48
VDC
TRANSIENT 120 ms
—
—
80
—
—
80
V
NO LOAD3
—
20
35
—
20
35
FULL LOAD
—
705
724
—
705
724
INHIBITED3
—
3
5
—
3
5
—
20
50
—
20
50
mA p-p
74
76
—
74
76
—
%
10 kHz to 10 MHz
EFFICIENCY
LOAD FAULT6
UNITS
mA
POWER DISSIPATION
MAIN3
—
—
12
—
—
12
±AUXILIARY
TRANSIENT
MAIN
± AUXILIARY
RECOVERY MAIN
RECOVERY ±AUX.
DELAY EACH OUTPUT
—
—
12
—
—
12
—
—
—
—
—
—
—
5
2
10
850
750
8
3
25
—
—
—
—
—
—
—
5
2
10
850
750
8
3
25
Notes
1. The sum of the 12 volt auxiliary output currents may not exceed 625 mA.
The sum of the 15 volt auxiliary output currents may not exceed 500 mA.
2. The sum of the auxiliary output power may not exceed 7.5 watts.
3. Case temperature –55°C to +125°C.
4. Load regulation for the +5 is specified at 0.0 to 1.5 A with the aux. both held
at 3.76 W (313 mA for the ±12, 250 mA for the ±15). Load regulation for the
aux. is specified as both aux. from 0.0 to 3.76 W (313 mA for ±12, 250 mA
for ±15) at the same time with the +5 held at 1.5 A.
W
mV pk
ms
ms
5. Cross regulation only occurs between the two auxiliaries and is measured on
–aux. +5 is held constant at 1.0 A. Cross regulation is specified for two
conditions:
Negative aux.= 3.76 W; positive aux.= 0.37 W to 3.76 W.
Negative aux. = 0.37 W to 3.76 W; positive aux. = 3.76 W.
6. Load fault = <0.05 Ω.
7. Transition time is 2 – 10 µs.
8. Time to settle to within 1% of Vout final value.
3
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
CONNECTION DIAGRAMS
MHF+ Triple
POSITIVE INPUT
9
10 k
INHIBIT
1N4148
1
2N3501
200 pF
10 K
3.9 K
8
INPUT
COMMON
FIGURE 2: INHIBIT INTERFACE
9
0.01
28V
F
7
+5 Output 2
Positive Input
+5
Load
+ Aux. Output 4
Sync In
+ Aux.
Load
5.1k
Output Common 3
1
Inhibit
8
Input Common
– Aux. Output 5
– Aux.
Load
If the sync terminal ([pin 7) is not used, it must be left floating.
The ac coupling shown will prevent sync signal failure.
FIGURE 3: AC COUPLING OF SYNC SIGNAL
1
Positive Input
Positive Output
2
9
Positive Input
FMH-461
EMI FILTER
28V
5
Input Common
MHF+ TRIPLE
Output Common 4
3
8
Input Common
Case*
6
Chassis Ground
*The case ground connection should be as low an impedance as possible to minimize EMI.
Direct contact of baseplate to chassis ground provides the lowest impedance.
FIGURE 4: EMI FILTER CONNECTION
4
DC/DC CONVERTERS
MHF+ SERIES TRIPLE
15 WATT
PIN OUT
Pin
1
2
3
4
5
6
7
8
9
Description
Inhibit
Main (+5 V) Output
Output Common
Positive Auxiliary Output
Negative Auxiliary Output
Case Ground
Sync In
Input Common
Positive Input
If Sync is not used, leave it unconnected.
Squared corner and dot on top
of package indicate pin one.
1
2
3
4
5
BOTTOM VIEW
MHF+ Triple
9
8
7
6
Dotted line outlines flanged package option.
Refer to Figures 13 - 16 for dimensions.
FIGURE 5: PIN OUT BOTTOM VIEW
MODEL NUMBERING KEY
MHF+ 28 512 T
Base Model
Input Voltage
F / ES
SMD NUMBERS
STANDARD MICROCIRCUIT
DRAWING (SMD)
5962-9560101HXC
5962-9560201HXC
MHF+
SIMILAR PART
MHF+28512T/883
MHF+28515T/883
Output Voltage
(Main and aux. Vout)
Number of Outputs
(T = triple)
Case Option
(Non-flanged case has no designator in
this position)
Flanged SMDs have the suffix HZC instead of HXC.
For exact specifications for an SMD product, refer to the SMD drawing. SMDs
can be downloaded from
http://www.dscc.dla.mil/programs/smcr
Screening
(Standard screening has no designator
in this position.)
5
DC/DC CONVERTERS
MHF+ SERIES TRIPLE
15 WATT
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
EFFICIENCY
EFFICIENCY
75
28 V
70
48 V
65
60
55
16 V
200 mV / div.
80
16 V
28 V
70
48 V
65
60
2
4
6
10
8
12
14
55
16
2
4
6
5 VDC
500 mV / div.
80
75
8
10
12
14
OUTPUT POWER (W)
OUTPUT POWER (W)
MHF+28512T EFFICIENCY
MHF+28515T EFFICIENCY
16
+15 VDC
–15 VDC
5 ms / div.
INPUT V: 16 TO 40 VDC, ±15 = 250 mA EACH, +5 = 1.5 A
MHF+ 28515T STEP LINE RESPONSE
MHF+28512T has a similar response
VIN
+5 VDC
+5
GND
5 V / div.
+12 VDC
2 V / div.
2 V / div.
INPUT
GND
+5 VDC
+5
GND
–12 VDC
5 ms / div.
5 ms / div.
5 ms / div.
MHF+28512T TURN ON INTO FULL LOAD
MAIN
MHF+28512T TURN ON INTO FULL LOAD
MAIN
MHF+28512T TURN ON INTO FULL LOAD
AUXILIARIES
MHF+28515T has a similar response
MHF+28515T has a similar response
MHF+28515T has a similar response
FIGURE 10
FIGURE 9
11.5
11
INPUT VOLTAGE
VIN
10 V / div.
VIN
INPUT
GND
MHF+28515T
10.5
10
MHF+28512T
9.5
9
8.5
2
4
6
8
10
12
14
MAXIMUM OUTPUT POWER (W)
LOW LINE DROPOUT
FIGURE 12
6
FIGURE 8
FIGURE 7
10 V / div.
10 V / div.
FIGURE 6
16
FIGURE 11
DC/DC CONVERTERS
MHF+ SERIES TRIPLE
15 WATT
Squared corner and dot on top
of case indicate pin one.
CASE E
BOTTOM VIEW
See Figure 14
for pin configurations.
1.130 max
(28.70)
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
Cold Rolled Steel/Nickel/Gold)
Pins
#52 alloy/Gold
compression glass seal
Case dimensions in inches (mm)
Tolerance ±0.005 (0.13) for three decimal places
±0.01 (0.3) for two decimal places
unless otherwise specified
1.460 max
(37.08)
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 13: CASE E MAXIMUM DIMENSIONS
BOTTOM VIEW CASE E2
MHF+ Series Triple: Screening – Standard, ES, or 883
Projection Weld
Seam Seal
Squared corner and dot on top
of case indicate pin one.
0.960
(24.38)
1
2
3
4
5
8
7
6
0.000
0.25 (6.35)
0.000
0.330 max
(8.38)
0.25 (6.35)
0.000
0.330 max
(8.38)
0.205
(5.21)
9
0.160
(4.06)
0.000
0.505
(12.83)
0.705
(17.91)
0.905
(22.99)
1.105
(28.07)
0.030 dia.
(0.76)
FIGURE 14: CASE E2
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.
7
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
Squared corner and dot on top
of case indicate pin one.
CASE G
BOTTOM VIEW
Flanged package
See Figure 16
for pin configuration
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover MHF+ Series and FMH Filter
Kovar/Nickel
Pins
#52 alloy (all cases)
compression glass seal
1.130 max
(28.70)
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
2.005 max
(50.93)
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.
Flange Thickness: 0.047 (1.19)
FIGURE 15: CASE G MAXIMUM DIMENSIONS
BOTTOM VIEW CASE G2
Flanged case: Designator (F) required in Case Option position of model number.
MHF+ Series Triple: Screening – Standard, ES, or 883
Projection Weld
Squared corner and dot on top
of case indicate pin one.
0.960
(24.38)
1
4
5
0.128 dia
(3.25)
6
1.105 (28.07)
1.590 (40.39)
7
0.905 (22.99)
0.000
8
0.705 (17.91)
9
0.140 (3.56)
0.25 (6.35)
0.000
0.330 max.
(8.38)
0.25 (6.35)
0.000
3
0.560
(14.22)
0.160
(4.06)
0.000
0.330 max.
(8.38)
2
0.505 (12.83)
0.030 dia.
(0.76)
0.205 (5.21)
Seam Seal
FIGURE 17: CASE G2
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.
8
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
TABLE 1: ENVIRONMENTAL SCREENING
TEST
STANDARD
/ES
/883 (Class H)*
yes
yes
yes
PRE-CAP INSPECTION
Method 2017, 2032
TEMPERATURE CYCLE (10 times)
Method 1010, Cond. C, -65°C to 150°C
no
no
yes
Method 1010, Cond. B, -55°C to 125°C
no
yes
no
CONSTANT ACCELERATION
Method 2001, 3000 g
no
no
yes
Method 2001, 500 g
no
yes
no
BURN-IN
Method 1015, 160 hours at 125°C
no
no
yes
96 hours at 125°C case (typical)
no
yes
no
FINAL ELECTRICAL TEST MIL-PRF-38534, Group A
Subgroups 1 through 6: -55°C, +25°C, +125°C
no
no
yes
Subgroups 1 and 4: +25°C case
yes
yes
no
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
no
yes
yes
Gross Leak, Method 1014, Cond. C
no
yes
yes
Gross Leak, Dip (1 x 10-3)
yes
no
no
yes
yes
yes
FINAL VISUAL INSPECTION
Method 2009
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.
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Email:
[email protected]
Interpoint UK
Phone: +44-1252-815511
Email:
[email protected]
9
21623-002-DTS Rev B This revision supercedes all previous releases.
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. MHF+ Series is a trademark of Interpoint.
Copyright © 1995 - 1999 Interpoint. All rights reserved.
Interpoint France
Phone: +33-134285455
Email:
[email protected]
Similar pages