MTR SERIES
30 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 16 to 40 VDC
Output Power
• 25 to 30 watts depending on model
Lead Soldering Temperature (10 sec per pin)
• 300°C
Storage Temperature Range (Case)
• –65°C to +135°C
DC/DC C
ONVERTERS
SYNC AND INHIBIT
Sync (500 to 675 kHz)
• Duty cycle 40% min, 60% max
• 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)
Voltage
≤0.8
V
Inhibit pin current 8.0 mA max
• Referenced to input common
• Logic high (output enabled)
Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C typical single and dual outputs
• 200 ppm/°C main, 300 ppm/°C aux
triple output
Input to Output Capacitance
• 50 pF typ (100 pF typ triple outputs)
Current Limit
• 115% of full load typical
Isolation
• 100 megohm minimum at 500 V
Audio Rejection
• 40 dB typ (50 dB typ triple output)l
Conversion Frequency
• Free run 550 min, 600 typ, 650 max kHz
• External sync 500 to 675 kHz
Inhibit Pin Voltage (unit enabled)
• 9 to 11 V
RECOMMENDED OPERATING CONDITIONS
Input Voltage Range
• 16 to 40 VDC continuous
• 50 V for 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
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, free run, unless otherwise specified.
SINGLE OUTPUT MODELS
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
1
OUTPUT POWER
1
OUTPUT RIPPLE
VOLTAGE
LINE REGULATION
2
LOAD REGULATION
INPUT VOLTAGE
1
NO LOAD TO FULL
INPUT CURRENT
1
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
Tc = –55°C TO +125°C
NO LOAD TO FULL
Tc = –55°C TO +125°C
CONTINUOUS
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
10 kHz – 10 MHz
Tc = –55°C TO +125°C
SHORT CIRCUIT
POWER DISSIPATION
RECOVERY
1, 4
50% – 100% – 50%
TRANSIENT
RECOVERY
4
16 – 40 – 16 VDC
TRANSIENT
5
RECOVERY
4
DELAY
OVERSHOOT
FULL LOAD
NO LOAD
MTR283R3S
MIN
3.27
0
0
—
—
—
—
—
—
16
—
—
—
—
—
74
—
—
—
—
—
—
—
—
—
TYP
3.30
––
—
15
—
5
—
2
—
28
—
30
0.94
7
25
76
—
1.4
MAX
3.33
6.06
20
40
50
10
10
10
10
40
50
75
—
8
50
—
10
6
MTR2805S
MIN
4.95
0
0
—
—
—
—
—
—
16
—
—
—
—
—
76
—
—
—
—
—
—
—
—
—
TYP
5.00
—
—
35
50
10
15
5
15
28
—
35
1.15
3
20
78
—
1.4
MTR2812S
MTR2815S
MTR2818S
MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
5.05 11.88 12.00 12.12 14.85 15.00 15.15 17.82 18.00 18.18 VDC
5.0
0
—
2.5
0
—
2.0
0
—
1.67
A
25
50
90
30
50
30
50
40
50
75
—
8
50
—
10
5
0
—
—
—
—
—
—
16
—
—
—
—
—
80
—
—
—
—
—
—
—
—
—
—
25
40
10
15
5
15
28
—
35
1.30
3
20
83
—
1.4
30
50
90
30
50
30
50
40
50
75
—
8
50
—
10
5
0
—
—
—
—
—
—
16
—
—
—
—
—
81
—
—
—
—
—
—
—
—
—
—
25
40
10
15
5
15
28
—
35
1.25
3
20
84
—
1.4
30
50
90
30
50
30
50
40
50
75
—
8
50
—
10
5
0
—
—
—
—
—
—
16
—
—
—
—
—
81
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
28
—
—
1.33
—
—
—
—
1.4
—
60
±500
300
—
0
—
30
40
90
30
50
30
50
40
50
50
—
8
50
—
10
—
W
mV p-p
mV
mV
VDC
V
mA
A
mA
mA p-p
%
W
ms
INPUT RIPPLE
CURRENT
EFFICIENCY
LOAD FAULT
3
STEP LOAD RESP.
±125 ±250
—
200
—
—
1.4
0
33
±300
300
5
50
150
±200 ±300
60
200
±200 ±300
—
300
1.4
0
50
5
50
250
±250 ±400
60
200
±400 ±500
—
300
1.4
0
120
5
120
600
±350 ±500
60
200
±500 ±600
—
300
1.4
0
150
5
150
750
±600 mV pk
—
µs
—
—
5
—
—
mV pk
µs
ms
STEP LINE RESP.
START-UP
1
mV pk
Notes
1. Tc = –55°C to +125°C
2. Operation is limited below 16V (see Figure 22).
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.
90
INTERPOINT [ INTERPOINT CORPORATION COMPANY ]
