MHF2812DF/883 [CRANE]
DC/DC CONVERTERS 28 VOLT INPUT; DC / DC转换器， 28伏特的输入
| 型号： | MHF2812DF/883 |
| 厂家： | 
Crane Aerospace & Electronics. |
| 描述： | DC/DC CONVERTERS 28 VOLT INPUT |
| 文件： | 总21页 (文件大小：314K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FEATURES
• –55° to +125°C operation
• 16 to 40 VDC input
• Fully isolated
MHF+ SERIES
SINGLE & DUAL
15 WATT
DC/DC CONVERTERS
28 VOLT NPUT
I
• 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
MODELS
VDC OUTPUT
SINGLE
3.3
5
5.2
12
DUAL
5
12
15
3
• Up to 84% efficiency, 28 W/in
15
28
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).
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 tran-
sients up to 50 volts. The package is a hermetically sealed, welded
metal case. Flanged and non-flanged models are available.
INHIBIT FUNCTION
MHF+ converters provide an inhibit terminal that can be used to
disable internal switching, resulting in no output and very low quies-
cent 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.
CONVERTER DESIGN
The MHF+ converters are switching regulators that use a quasi-
square 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.
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.
For the MHF+ dual output models, good cross regulation is main-
tained 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.
SHORT CIRCUIT PROTECTION
HIGHER POWER DENSITY
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.
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 foot-
2,
print of 1.7 in this low profile package offers a total power density
of up to 28 watts per cubic inch.
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
SYNC AND INHIBIT
TYPICAL CHARACTERISTICS
Input Voltage
• 16 to 40 VDC
Power Dissipation (Pd)
• 6 W
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
Sync In (500 to 600 kHz)
• Duty cycle 40% to 60%
• Logic low 0.8 V max
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
• 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
RECOMMENDED OPERATING CONDITIONS
• 50 dB typical
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
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
• –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
MHF+2805S
MHF+285R2S
PARAMETER
CONDITION
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
UNITS
VDC
A
OUTPUT VOLTAGE
3.27 3.30 3.33
4.95 5.00 5.05
5.16 5.20 5.24
OUTPUT CURRENT
OUTPUT POWER
V
= 16 to 40 VDC
= 16 to 40 VDC
0
0
—
—
2.4
8
0
0
—
—
2.4
12
0
0
—
—
2.4
IN
IN
V
12.48
W
OUTPUT RIPPLE
VOLTAGE
10 kHz - 2 MHz
—
—
—
—
16
—
30
50
5
80
120
100
50
—
—
—
—
16
—
30
60
5
80
100
50
—
—
—
—
16
—
30
60
5
50
100
35
mV p-p
Tc = –55°C to +125°C
Vin = 16 to 40 VDC
NO LOAD TO FULL
CONTINUOUS
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
mV
mV
VDC
V
20
28
—
20
28
—
50
20
28
—
35
40
40
40
TRANSIENT 50 ms
50
50
50
INPUT CURRENT
NO LOAD
FULL LOAD
—
—
—
—
—
72
25
—
5
65
397
12
—
—
—
—
—
75
25
40
—
—
—
—
—
75
25
42
560 624
560 605
mA
INHIBITED
5
12
80
5
12
100
100
—
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
Tc = –55°C to +125°C
45
—
75
80
35
—
77
35
—
77
mA pp
%
120
—
100
—
EFFICIENCY
1
LOAD FAULT
SHORT CIRCUIT
POWER DISSIPATION
—
—
5
8
—
—
3.5
7.5
6
—
—
3.5
7.5
6
W
2
RECOVERY
7.5
30
30
30
ms
STEP LOAD RESP.
STEP LINE RESP.
START-UP
50% – 100% – 50%
TRANSIENT
–400 150 500
150 300
–400 150 400
150 300
–400 150 400
150 300
mV pk
µs
2
RECOVERY
—
—
—
16 – 40 – 16 VDC
3
TRANSIENT
–800 550 800
–800 550 800
–800 550 800
mV pk
ms
2
RECOVERY
—
—
—
0.8
10
1.2
25
—
—
—
0.8
10
1.2
25
—
—
—
0.8
10
1.2
25
DELAY
ms
4
OVERSHOOT
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.
3. Input step transition time >10 µs.
4. Input step transition time <100 µs.
2
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
MHF+2812S
MHF+2815S
MHF+2828S
PARAMETER
CONDITION
MIN TYP MAX
MIN TYP MAX
MIN TYP MAX
UNITS
VDC
A
OUTPUT VOLTAGE
11.88 12.00 12.12
14.85 15.00 15.15
27.72 28.00 28.28
OUTPUT CURRENT
OUTPUT POWER
V
= 16 to 40 VDC
= 16 to 40 VDC
0
0
—
—
1.25
15
0
0
—
—
1.00
15
0
0
—
—
0.54
15
IN
IN
V
W
OUTPUT RIPPLE
VOLTAGE
10 kHz - 2 MHz
—
—
—
—
16
—
30
50
5
80
120
50
—
—
—
—
16
—
30
50
5
80
120
50
—
—
—
—
16
—
60
120
mV p-p
Tc = –55°C to +125°C
Vin = 16 to 40 VDC
NO LOAD TO FULL
CONTINUOUS
100 180
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
50
50
28
—
150
150
40
mV
mV
VDC
V
20
28
—
50
20
28
—
50
40
40
TRANSIENT 50 ms
50
50
50
INPUT CURRENT
NO LOAD
FULL LOAD
—
—
—
—
—
78
25
50
—
—
—
—
—
78
25
62
—
—
—
—
—
82
25
60
680 752
670 752
640 760
mA
INHIBITED
5
12
80
5
12
80
5
12
80
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
Tc = –55°C to +125°C
35
—
79
35
—
80
35
—
84
mA pp
%
120
—
120
—
120
—
EFFICIENCY
1
LOAD FAULT
SHORT CIRCUIT
POWER DISSIPATION
—
—
3.5
7.5
6
—
—
3.5
7.5
6
—
—
3.5
7.5
6
W
2
RECOVERY
30
30
30
ms
STEP LOAD RESP.
STEP LINE RESP.
START-UP
50% – 100% – 50%
TRANSIENT
–500 150 500
150 300
–600 200 600
150 300
–800 600 800
200 400
mV pk
µs
2
RECOVERY
—
—
—
16 – 40 – 40 VDC
3
TRANSIENT
–800 550 800
–800 550 800
–1200 1100 1200
mV pk
ms
2
RECOVERY
—
0
0.8
10
1.2
25
—
0
0.8
10
1.2
25
—
0
0.8
10
1.2
25
DELAY
ms
4
OVERSHOOT
0
200 1200
0
200 1500
0
200 280
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 point at
which Vout is within regulation.
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
MHF+2805D
MHF+2812D
MHF+2815D
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
OUTPUT VOLTAGE
+V
4.95
5.00
5.05
11.88
12.00
12.12
14.85
15.00
15.15
OUT
VDC
–V
OUT
4.92
5.00
5.08
11.82
12.00
1218
14.78
15.00
15.23
1
OUTPUT CURRENT
V
V
= 16 to 40 VDC
= 16 to 40 VDC
—
—
1.2
—
1.92
12
—
—
0.625
—
1.125
15
—
—
0.500
—
0.900
15
A
IN
IN
1
OUTPUT POWER
W
OUTPUT RIPPLE
10 kHz - 2 MHz
—
—
30
60
80
—
—
30
60
80
—
—
30
50
80
mV p-p
mV
VOLTAGE
V
Tc = –55°C to +125°C
120
120
120
OUT
LINE REGULATION
BALANCED +V
OUT
—
5
50
—
5
50
—
5
50
Vin = 16 to 40 VDC
LOAD REGULATION
LOAD
BALANCED +V
LOAD –V
NEGATIVE V
–V
—
—
—
80
50
—
—
—
100
50
—
—
—
100
50
OUT
20
20
20
OUT
mV
%
—
—
—
6
100
7.5
—
—
—
3
100
6
—
—
—
3
100
6
OUT
2
CROSS REGULATION
OUT
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
CONTINUOUS
TRANSIENT 50 msec
NO LOAD
16
—
—
—
—
—
—
77
28
—
40
50
40
600
12
50
80
—
16
—
—
—
—
—
—
76
28
—
40
50
16
—
—
—
—
—
—
76
28
—
40
50
VDC
V
20
540
6
25
645
5
50
25
638
5
50
FULL LOAD
754
12
754
12
mA
INHIBITED
INPUT RIPPLE
CURRENT
10 kHz - 10 MHz
Tc = –55°C to +125°C
20
40
79
35
50
83
60
35
50
84
60
mA p-p
%
100
—
100
—
EFFICIENCY
3
LOAD FAULT
SHORT CIRCUIT
POWER DISSIPATION
—
—
3
6
—
—
3
6
—
—
3
6
W
4
RECOVERY
7.5
30
7.5
50
7.5
50
ms
5
STEP LOAD RESP.
50% – 100% – 50%
BALANCED LOADS
+V
OUT
–600
200
600
–600
300
600
–600
300
600
TRANSIENT
mV pk
µs
–V
–600
—
150
150
600
500
–600
—
100
200
500
400
–600
—
100
200
600
500
OUT
4
RECOVERY
STEP LINE RESP.
16 – 40 – 40 VDC
6
V
TRANSIENT
–800
600
800
–750
550
750
–750
550
750
mV pk
OUT
4
RECOVERY
—
—
0
0.8
12
1.2
20
—
—
0
0.8
12
1.2
25
—
—
0
0.8
12
1.2
25
ms
ms
START-UP
DELAY
7
OVERSHOOT
100
250
200
750
200
750
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:
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.
+Po = 50% to 10% and –Po = 50%
7. Input step transition time <100 µs.
+Po = 50% and –Po = 50% to 10%
4
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
BLOCK DIAGRAM
5 µH
Positive
Input
Positive
Output
2 µF
I
D
PWM
Controller
Limit
Inhibit
Ref.
I
C
Output
Common
Input
Common
FIGURE 1: MHF+ SINGLE OUTPUT
5
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
PIN OUT
Pin
Single Output
(Except MHF+2828S)
Inhibit
MHF+2828S
Dual Output
1
2
3
4
5
6
7
8
Inhibit
Inhibit
Positive Output
No connection
Output Common
Positive Output
Sync
Positive Output
(See note 1, below) Output Common
Output Common
Sync
Negative Output
Sync
2
Case Ground
Input Common
Positive Input
Case Ground
Input Common
Positive Input
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
STANDARD MICROCIRCUIT
DRAWING (SMD)
MHF+
SIMILAR PART
MODEL NUMBERING KEY
IN PROCESS
5962-9213901HXC
IN PROCESS
5962-9166401HXC
5962-9160101HXC
5962-9689801HXC
5962-9555901HXC
5962-9214401HXC
5962-9161401HXC
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
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)
Flanged SMDs have the suffix HZC instead of HXC.
Screening
(Standard screening has no designator
in this position.)
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
6
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
90
90
80
70
60
50
40
90
80
70
60
50
40
16V
16V
80
70
60
50
40
16V
28V
40V
40V
40V
28V
28V
2
4
6
8
10
12
2
4
6
8
10
12
14 15
2
4
6
8
10
12
14 15
OUTPUT POWER (Watts)
MHF+2805S EFFICIENCY
OUTPUT POWER (Watts)
MHF+2812S EFFICIENCY
OUTPUT POWER (Watts)
MHF+2815S EFFICIENCY
FIGURE 3
FIGURE 4
FIGURE 5
90
90
80
70
60
50
40
90
80
70
60
50
40
16V
16V
16V
80
70
60
50
40
40V
40V
40V
28V
28V
28V
2
4
6
8
10 12
14
2
4
6
8
10 12
14 15
2
4
6
8
10
12
OUTPUT POWER (Watts)
MHF+2815D EFFICIENCY
OUTPUT POWER (Watts)
MHF+2812D EFFICIENCY
OUTPUT POWER (Watts)
MHF+2805D EFFICIENCY
FIGURE 6
FIGURE 7
FIGURE 8
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
V
OUT
100% to 50%
50% to 100%
V
IN
0.1
1
10
100
1ms/div
16V TO 40V
50µs/div
FREQUENCY (kHz)
MHF+ SERIES AUDIO REJECTION
50%
100%
MHF+2805S STEP LINE RESPONSE
MHF+2805S STEP LOAD RESPONSE
FIGURE 10
FIGURE 9
FIGURE 11
7
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
V
IN
100% to 10%
10% to 100%
+V
OUT
P
= 12W
OUT
V
IN
V
OUT
1 ms/div
16V TO 40V
MHF+2815D STEP LINE RESPONSE
2 ms/div
200µs/div
10% 100%
MHF+2805S TURN-ON INTO FULL LOAD
MHF+2805S STEP LOAD RESPONSE
FIGURE 13
FIGURE 14
FIGURE 12
P
= 7.5 W
100% to 50%
P = 7.5 W
O
O
–V
OUT
OUT
100% to 20%
+V
20% to 100%
V
IN
50% to 100%
50µs/div
50% 100%
STEP LOAD RESPONSE
50µs/div
20% 100%
STEP LOAD RESPONSE
2 ms/div
MHF+2815D +V
MHF+2815D +V
OUT
OUT
MHF+2815D TURN-ON INTO FULL LOAD
FIGURE 15
FIGURE 16
FIGURE 17
10
8
2805D
2812D
10
5
16
6
MHF+2805S&D
4
COND A
COND B
15
2
2812D
2815D
0
2815D
0
14
–2
–4
–6
–8
–10
MHF+2812S&D
MHF+2815S&D
2812D
2805D
–5
13
2805D
–10
12
0
20
40
60
80
100
10
11
12
13
14
15
10
20
30
40
50
POSITIVE OUTPUT LOAD (% OF TOTAL LOAD)
–V
OUTPUT POWER (Watts)
50 mV DROP
LOW LINE DROPOUT VS. LOAD
OUTPUT LOAD (%)
WITH SHIFT IN LOAD BALANCE
OUT CROSS REGULATION
COND. A: 50% LOAD +V; 50% to 10% –V
COND. B: 50% LOAD –V; 50% to 10% +V
MHF+2805D/MHF+2812D/MHF+2815D
CROSS REGULATION
FIGURE 18
FIGURE 19
FIGURE 20
8
MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC CONVERTERS
Squared corner and dot on top
of case indicate pin one.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
CASE E
Cold Rolled Steel/Nickel/Gold)
#52 alloy/Gold
compression glass seal
BOTTOM VIEW
See Figure 22
for pin configurations.
Pins
1.130 max
(28.70)
Case dimensions in inches (mm)
Tolerance 0.005 (0.13) for three decimal places
0.01 (0.3) for two decimal places
1.460 max
(37.08)
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 21: CASE E MAXIMUM DIMENSIONS
BOTTOM VIEW CASE E1
MHF+ Series Single and Dual: 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
8
2
3
7
4
5
6
0.030 dia.
(0.76)
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.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover MHF+ Series and FMH Filter
Kovar/Nickel
SMHF
CASE G
Cold Rolled Steel/Nickel
#52 alloy (all cases)
compression glass seal
BOTTOM VIEW
Flanged package
See Figure 24
1.130 max
(28.70)
Pins
for pin configuration
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
Seam Seal
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)
0.128 dia
(3.25)
0.560
(14.22)
8
7
6
0.160
(4.06)
0.000
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)*
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
no
yes
CONSTANT ACCELERATION
Method 2001, 3000 g
no
no
no
yes
no
Method 2001, 500 g
yes
BURN-IN
Method 1015, 160 hours at 125°C
96 hours at 125°C case (typical)
no
no
no
yes
no
yes
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
no
yes
no
yes
yes
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
no
no
yes
yes
no
yes
yes
no
Gross Leak, Method 1014, Cond. C
-3
Gross Leak, Dip (1 x 10
)
yes
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.
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Interpoint UK
Phone: +44-1252-815511
Interpoint France
Phone: +33-134285455
Email:
poweruk@intp.com
Email:
powerfr@intp.com
Email:
power@intp.com
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.
12
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
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
28 VOLT NPUT
I
MODELS
VDC OUTPUT
TRIPLE OUTPUT
+5 and 12
+5 and 15
• Up to 76% efficiency
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.
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, asyn-
chronous (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.
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.
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.
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.
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 dissi-
pation and also provides greater stability when mechanically
secured.
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.
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
DC/DC CONVERTERS
15 WATT
ABSOLUTE MAXIMUM RATINGS
SYNC AND INHIBIT
TYPICAL CHARACTERISTICS
Input Voltage
• 16 to 48 VDC
Output Voltage Temperature Coefficient
• 150 ppm/°C typical
Sync 400 to 600 kHz
• Duty cycle 40% to 60%
Power Dissipation (Pd)
• 12 watts
Output Power
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
• 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
• 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
Logic high (output enabled)
Open collector
Unconnected or 11 to 40 V
• 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
0°
+5 OUTPUT
POSITIVE
INPUT
FEEDBACK ISOLATOR
PWM CM
CONTROLLER
OUTPUT
COMMON
INPUT
COMMON
+ AUX.
OUTPUT
FEEDBACK ISOLATOR
SYNC
PWM CM
CONTROLLER
180°
–AUX.
OUTPUT
FIGURE 1: BLOCK DIAGRAM
2
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
MHF+28512T
MHF+28515T
PARAMETER
CONDITION
MAIN
MIN
4.95
11.64
11.64
0
TYP
5.0
12.0
12.0
—
MAX
5.05
12.36
12.36
1.5
MIN
4.925
14.55
14.55
0
TYP
5.0
15.0
15.0
—
MAX
5.05
15.45
15.45
1.5
UNITS
OUTPUT VOLTAGE
+ AUXILIARY
– AUXILIARY
MAIN
VDC
1
OUTPUT CURRENT
+ AUXILIARY
– AUXILIARY
TOTAL
—
—
0.416
0.416
2.125
7.5
—
—
0.333
0.333
2.0
A
—
—
—
—
—
—
—
—
2
OUTPUT POWER
MAIN
—
—
—
—
7.5
+ AUXILIARY
– AUXILIARY
TOTAL
—
—
5
—
—
5
W
—
—
5
—
—
5
—
—
15
—
—
15
OUTPUT RIPPLE
VOLTAGE
10 kHz to 2 MHz
10 kHz to 2 MHz
MAIN
MAIN
—
20
75
—
20
75
mV p-p
mV
AUXILIARY
—
30
90
—
30
112
75
3
LINE REGULATION
= MIN. TO MAX.
—
25
75
—
25
V
AUXILIARY
MAIN
—
120
25
240
60
—
150
25
300
60
IN
LOAD REGULATION
3, 4
—
—
mV
AUXILIARY
—
120
—
240
1200
48
—
150
—
300
1500
48
5
CROSS REGULATION
INPUT VOLTAGE
– AUXILIARY
CONTINUOUS
TRANSIENT 120 ms
—
—
mV
VDC
V
16
—
28
16
28
—
80
—
—
80
3
INPUT CURRENT
NO LOAD
—
—
—
—
74
20
705
3
35
724
5
—
—
—
—
74
20
705
3
35
724
5
FULL LOAD
mA
3
INHIBITED
INPUT RIPPLE CURRENT
EFFICIENCY
10 kHz to 10 MHz
20
76
50
—
20
76
50
—
mA p-p
%
6
LOAD FAULT
POWER DISSIPATION
3
MAIN
—
—
—
—
12
12
—
—
—
—
12
12
W
AUXILIARY
TRANSIENT
STEP LOAD
RESPONSE
3, 7, 8
MAIN
AUXILIARY
RECOVERY MAIN
RECOVERY AUX.
DELAY EACH OUTPUT
—
—
—
—
—
—
—
5
2
10
850
750
8
3
25
—
—
—
—
—
—
—
5
2
10
850
750
8
3
25
mV pk
ms
ms
3,
START-UP
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.
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
1N4148
INHIBIT
200 pF
1
2N3501
10 K
8
3.9 K
INPUT
COMMON
FIGURE 2: INHIBIT INTERFACE
9
2
4
+5 Output
Positive Input
Sync In
0.01
5.1k
F
+5
7
1
+ Aux. Output
Load
+ Aux.
Load
28V
3
5
Inhibit
Output Common
– Aux.
Load
8
Input Common
– Aux. Output
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
5
2
4
9
8
Positive Output
Positive Input
Positive Input
FMH-461
EMI FILTER
28V
MHF+ TRIPLE
Input Common
Input Common
Output Common
3
6
Case*
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
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
PIN OUT
Pin
1
Description
Inhibit
2
Main (+5 V) Output
Output Common
Positive Auxiliary Output
Negative Auxiliary Output
Case Ground
3
4
5
6
7
Sync In
8
Input Common
Positive Input
9
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
SMD NUMBERS
STANDARD MICROCIRCUIT
DRAWING (SMD)
5962-9560101HXC
5962-9560201HXC
MHF+
SIMILAR PART
MHF+28512T/883
MHF+28515T/883
MHF+ 28 512
T
F / ES
Base Model
Input Voltage
Output Voltage
(Main and aux. Vout)
Flanged SMDs have the suffix HZC instead of HXC.
Number of Outputs
(T = triple)
For exact specifications for an SMD product, refer to the SMD drawing. SMDs
can be downloaded from
http://www.dscc.dla.mil/programs/smcr
Case Option
(Non-flanged case has no designator in
this position)
Screening
(Standard screening has no designator
in this position.)
5
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
Typical Performance Curves: 25°C Tc , 28 VDC Vin, 100% load, free run, unless otherwise specified.
80
75
80
75
16 V
16 V
5 VDC
28 V
28 V
70
65
60
70
65
48 V
48 V
+15 VDC
60
55
–15 VDC
55
5 ms / div.
2
4
6
10
12 14 16
8
2
4
6
10
12 14 16
8
INPUT V: 16 TO 40 VDC, 15 = 250 mA EACH, +5 = 1.5 A
OUTPUT POWER (W)
OUTPUT POWER (W)
MHF+ 28515T STEP LINE RESPONSE
MHF+28512T has a similar response
MHF+28512T EFFICIENCY
MHF+28515T EFFICIENCY
FIGURE 6
FIGURE 7
FIGURE 8
V
IN
V
V
IN
IN
INPUT
GND
INPUT
GND
+12 VDC
+5 VDC
+5 VDC
–12 VDC
+5
+5
GND
GND
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 9
FIGURE 10
FIGURE 11
11.5
11
MHF+28515T
10.5
10
MHF+28512T
9.5
9
8.5
2
4
6
8
10 12 14 16
MAXIMUM OUTPUT POWER (W)
LOW LINE DROPOUT
FIGURE 12
6
MHF+ SERIES TRIPLE
15 WATT
DC/DC CONVERTERS
Squared corner and dot on top
of case indicate pin one.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover Kovar/Nickel
(SMHF Series
CASE E
BOTTOM VIEW
See Figure 14
Cold Rolled Steel/Nickel/Gold)
Pins
#52 alloy/Gold
1.130 max
(28.70)
for pin configurations.
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
1.460 max
(37.08)
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 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
9
2
3
8
4
7
5
0.030 dia.
(0.76)
6
0.160
(4.06)
0.000
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.
Materials
Header Cold Rolled Steel/Nickel/Gold
Cover MHF+ Series and FMH Filter
Kovar/Nickel
Pins
#52 alloy (all cases)
CASE G
compression glass seal
BOTTOM VIEW
Flanged package
See Figure 16
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
for pin configuration
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
Seam Seal
Squared corner and dot on top
of case indicate pin one.
0.960
(24.38)
1
9
2
3
8
4
7
5
6
0.128 dia
(3.25)
0.030 dia.
(0.76)
0.560
(14.22)
0.160
(4.06)
0.000
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)*
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
no
yes
CONSTANT ACCELERATION
Method 2001, 3000 g
no
no
no
yes
no
Method 2001, 500 g
yes
BURN-IN
Method 1015, 160 hours at 125°C
96 hours at 125°C case (typical)
no
no
no
yes
no
yes
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
no
yes
no
yes
yes
HERMETICITY TESTING
Fine Leak, Method 1014, Cond. A
no
no
yes
yes
no
yes
yes
no
Gross Leak, Method 1014, Cond. C
-3
Gross Leak, Dip (1 x 10
)
yes
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.
Contact Information:
www.interpoint.com
Interpoint Headquarters USA
Phone: 1-800-822-8782
+425-882-3100
Interpoint France
Phone: +33-134285455
Email:
powerfr@intp.com
Email:
power@intp.com
Interpoint UK
Phone: +44-1252-815511
Email:
poweruk@intp.com
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.
9
相关型号：
©2020 ICPDF网 联系我们和版权申明