MTW SERIES
30 WATT
ABSOLUTE MAXIMUM RATINGS
Input Voltage
• 18 to 40 VDC (19 to 40 VDC MTW2805S)
Output Power
• 30 watts
Lead Soldering Temperature (10 sec per lead)
• 300°C
Storage Temperature Range (Case)
• –55°C to +125°C
DC/DC C
ONVERTERS
INHIBIT
Inhibit TTL Open Collector
• Logic low (output disabled)
Inhibit pin current 1 mA typical
• Referenced to input common
• Logic high (output enabled)
Open collector
TYPICAL CHARACTERISTICS
Output Voltage Temperature Coefficient
• 100 ppm/°C, typical
Input to Output Capacitance
• 80 pF typical single output models
• 70 pF typical MTW2812D
• 60 pF typical MTW2815D
Current Limit
• 125% of full load typical
Isolation
• 100 megohm minimum at 500 V
Conversion Frequency
• 240 to 300 kHz
Inhibit Pin Voltage (unit enabled)
• 11 to 15 V single output models
• 8 to 12 V MTW2812D
• 10 to 14 V MTW2815D
Input Voltage Range
• 18 to 40 VDC continuous (19 to 40 MTW2805S)
• 50 V for 50 msec transient
Case Operating Temperature (Tc)
• –55°C to +85°C full power
• –55°C to +115°C absolute
Derating Output Power/Current
• Linearly from 100% at 85°C to 0% at 115° C
RECOMMENDED OPERATING CONDITIONS
Electrical Characteristics: 25°C Tc, 28 VDC Vin, 100% load, unless otherwise specified.
MTW2805S
PARAMETER
OUTPUT VOLTAGE
OUTPUT CURRENT
OUTPUT POWER
OUTPUT RIPPLE
LINE REGULATION
1
LOAD REGULATION
1
INPUT VOLTAGE
–55°C TO +85°C
INPUT CURRENT
–55°C TO +85°C
BW
≤
2 MHz
MIN. TO MAX. V
IN
NO LOAD TO FULL
NO LOAD TO FULL
TRANSIENT 50 ms
NO LOAD
FULL LOAD
INHIBITED
INPUT RIPPLE
CURRENT
EFFICIENCY
START-UP
DELAY
2
OVERSHOOT
BW
≤
2 MHz
—
80
—
—
5
82
15
300
10
—
—
—
—
82
—
—
10
84
30
400
20
—
—
—
—
84
—
—
10
86
40
400
20
—
—
—
mA p-p
%
ms
mV
CONDITIONS
MIN
4.95
—
—
—
—
—
19
—
—
—
—
TYP
5.0
—
—
30
7
5
28
—
15
—
—
MAX
5.05
6.0
30.0
50
20
20
40
50
20
1370
15
MIN
11.88
—
—
—
—
—
18
—
—
—
—
MTW2812S
TYP
12.0
—
—
30
10
10
28
—
20
—
—
MAX
12.12
2.5
30.0
65
25
20
40
50
35
1400
22
MIN
14.85
—
—
—
—
—
18
—
—
—
—
MTW2815S
TYP
15.0
—
—
30
10
10
28
—
20
—
—
MAX
15.15
2.0
30.0
65
25
20
40
50
35
1400
22
mA
UNITS
VDC
A
W
mV p-p
mV
mV
VDC
Notes
1. For MTW2805S, with the remote sense pins connected to the load and no resistance between the output pins and load.
2. A low output impedance power source is required on the input to realize this start-up time. If less than full surge current is available, start-up time
will be longer
CAUTION
Permanent damage to the MTW2805S will result if pin 6 is shorted to ground. Damage may also result if pin 4 or pin 5 is disconnected from the load
during operation with the remote sense leads connected to the load. If remote sense pins are not connected to the load, the output voltage of the
MTW2805S will rise to approximately 6.2 VDC measured across pins 4 and 5.
B4-10
CRANE [ Crane Aerospace & Electronics. ]
