MHF+ SERIES
SINGLE AND DUAL
15 WATT
DC/DC C
ONVERTERS
SYNC AND INHIBIT
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
ABSOLUTE MAXIMUM RATINGS
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
TYPICAL CHARACTERISTICS
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
RECOMMENDED OPERATING CONDITIONS
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
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
LOAD REGULATION
INPUT VOLTAGE
NO LOAD TO FULL
INPUT CURRENT
CONDITION
V
IN
= 16 to 40 VDC
V
IN
= 16 to 40 VDC
10 kHz - 2 MHz
Tc = –55°C to +125°C
Vin = 16 to 40 VDC
NO LOAD TO FULL
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
10 kHz - 10 MHz
Tc = –55°C to +125°C
SHORT CIRCUIT
POWER DISSIPATION
RECOVERY
2
50% – 100% – 50%
TRANSIENT
RECOVERY
2
16 – 40 – 16 VDC
TRANSIENT
3
RECOVERY
2
DELAY
OVERSHOOT
4
MHF+283R3S
MIN
3.27
0
0
—
—
—
—
16
—
—
—
—
—
—
72
—
—
–400
—
–800
—
—
—
TYP MAX
3.30 3.33
—
2.4
—
30
50
5
20
28
—
25
—
5
45
—
75
5
7.5
150
150
550
0.8
10
200
8
80
120
100
50
40
50
65
397
12
80
120
—
8
30
500
300
800
1.2
25
300
MHF+2805S
MIN
4.95
0
0
—
—
—
—
16
—
—
—
—
—
—
75
—
—
–400
—
–800
—
—
—
TYP MAX
5.00 5.05
—
2.4
—
30
60
5
20
28
—
25
560
5
35
—
77
3.5
7.5
150
150
550
0.8
10
100
12
80
100
50
50
40
50
40
624
12
80
100
—
6
30
400
300
800
1.2
25
600
MHF+285R2S
MIN
5.16
0
0
—
—
—
—
16
—
—
—
—
—
—
75
—
—
–400
—
–800
—
—
—
TYP MAX
5.20 5.24
—
2.4
—
30
60
5
20
28
—
25
560
5
35
—
77
3.5
7.5
150
150
550
0.8
10
100
12.48
50
100
35
35
40
50
42
605
12
100
100
—
6
30
400
300
800
1.2
25
600
UNITS
VDC
A
W
mV p-p
mV
mV
VDC
V
mA
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT
1
mA pp
%
W
ms
mV pk
µs
mV pk
ms
ms
mV pk
STEP LOAD RESP.
STEP LINE RESP.
START-UP
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
INTERPOINT [ INTERPOINT CORPORATION COMPANY ]
