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MHD2805S Datasheet(PDF) 2 Page - Crane Aerospace & Electronics.

Part No. MHD2805S
Description  DC/DC CONVERTERS 28 VOLT INPUT
Download  11 Pages
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Manufacturer  CRANE [Crane Aerospace & Electronics.]
Direct Link  http://www.craneae.com
Logo CRANE - Crane Aerospace & Electronics.

MHD2805S Datasheet(HTML) 2 Page - Crane Aerospace & Electronics.

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TYPICAL CHARACTERISTICS
SYNC AND INHIBIT
RECOMMENDED OPERATING CONDITIONS
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 40 V
Output Power
• 15 to 20 watts depending on model
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –65°C to +150°C
B2-48
MHD SERIES
20 WATT
DC/DC CONVERTERS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical
Input to Output Capacitance
• 50 pF typical
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 50 dB typical
Conversion Frequency
• Free run mode 625 kHz typical
550 kHz. min, 650 kHz max
• External sync range 500 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• 9 to 11 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
• Linearly from 100% at 125°C to 0% at 135° C
Sync (500 to 675 kHz)
• Duty cycle 40% min, 60% max
• Logic low 0.8 V max, 0.0 V min
• Logic high 4.0 V min, 10 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 8.0 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector
SINGLE OUTPUT MODELS
MHD2805S
MHD2812S
MHD2815S
MHD2818S
PARAMETER
CONDITION
MIN
TYP MAX
MIN
TYP MAX
MIN
TYP MAX
MIN
TYP MAX
UNITS
OUTPUT VOLTAGE
4.95
5.00
5.05
11.88 12.00 12.12
14.85 15.00 15.15
17.82 18.00 18.18
VDC
OUTPUT CURRENT1
VIN = 16 to 40 VDC
0
3
0
1.67
0
1.33
0
1.11
A
OUTPUT POWER1
VIN = 16 to 40 VDC
0
15
0
20
0
20
0
20
W
OUTPUT RIPPLE
10 kHz – 2 MHz
35
50
25
40
25
40
40
mV p
VOLTAGE
Tc = –55°C TO +125°C
50
90
40
90
40
90
90
LINE REGULATION2
Vin = 16 to 40 VDC
10
50
10
50
10
50
50
mV
Tc = –55°C TO +125°C
15
50
15
50
15
50
50
LOAD REGULATION
NO LOAD TO FULL
5
50
5
50
5
50
50
mV
Tc = –55°C TO +125°C
15
50
15
50
15
50
50
INPUT VOLTAGE1
CONTINUOUS
16
28
40
16
28
40
16
28
40
16
28
40
VDC
NO LOAD TO FULL
TRANSIENT 50 ms
50
50
50
50
V
INPUT CURRENT
NO LOAD1
35
75
35
75
35
75
75
mA
FULL LOAD
0.70
0.87
0.85
A
INHIBITED1
—7
8
7
8
7
8
8
mA
INPUT RIPPLE
10 kHz – 10 MHz
CURRENT
Tc = –55°C TO +125°C
20
50
20
50
20
50
50
mA p-p
EFFICIENCY
76
78
80
83
81
84
81
%
LOAD FAULT3
SHORT CIRCUIT
SHORT CIRCUIT TO
POWER DISSIPATION
10
10
10
10
A
FULL LOAD
RECOVERY1, 3
1.4
5
1.4
5
1.4
5
5
ms
STEP LOAD RESP.
50% – 100% – 50%
±200 ±300
±250 ±400
±350 ±500
±600
TRANSIENT
10% – 100%
–400 –600
–600 –1000
–800 –1200
mV pk
100% – 10%
+350 +600
+500 +750
+600 +1000
50% – 100% – 50%
60
200
60
200
60
200
200
RECOVERY4
10% – 100%
60
600
150
300
250
500
µs
100% – 10%
200
600
250
500
250
500
STEP LINE RESP.
16 – 40 – 16 VDC
TRANSIENT5
±200 ±300
±400 ±500
±500 ±600
±600
mV pk
RECOVERY4
300
300
300
300
µs
START-UP1
DELAY
1.4
5
1.4
5
1.4
5
5
ms
OVERSHOOT
FULL LOAD
0
50
0
120
0
150
180
mV pk
NO LOAD
50
250
120
600
150
750
Electrical Characteristics:25C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
Notes
1. Tc = –55°C to +125°C
2. Operation is limited below 16V (see Figure 15).
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 1% of final value.
5. Transition time
≥ 10 µs.


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