Performance/Functional Specifications

external caps and full-load conditions unless noted.

All models are tested/specified with two external 0.047μF output capacitors. These capacitors

are necessary to accommodate our test equipment and may not be required to achieve speci-

fied performance in your applications. All models are stable and regulate within spec under

no-load conditions.

Input Reflected Ripple Current is tested/specified over a 20MHz bandwidth. Input filtering is

For consistent operation, the instantaneous input voltage for full output load must not go below

the low shutdown voltage AT ALL TIMES. Beware of excessive voltage drop from long input

wiring. For reliable startup, be sure to apply input power promptly and fully as a step function.

Mean Time Before Failure is calculated using the Telcordia (Belcore) SR-332 Method 1, Case

The On/Off Control may be driven with external logic or the application of appropriate voltages

(referenced to Common). The On/Off Control input should use either an open collector/open drain

negative logic (LO = on, HI = off) using the "N" model suffix.

Maximum Power Derating curves indicate an average current at nominal input voltage. At higher

temperatures and/or lower airflow, the DC/DC converter will tolerate brief full current outputs if

the total RMS current over time does not exceed the derating curve.

All models are fully operational and meet published specifications, including cold start at –40°C.

Output noise may be further reduced by adding an external filter. See I/O Filtering and Noise

Reduction.

The outputs share a common isolated return. The two output sections are not isolated from

each other.

Regulation specifications describe the deviation as the line input voltage or output load current

is varied from a nominal midpoint value to either extreme.

The outputs will not accept appreciable reverse current without possible damage.

Input

Input Voltage Range

See Ordering Guide

Start-Up Threshold:

12V Models

9V minimum, 9.5V typical

24V Models

16.5V minimum, 17V typical

48V Models

34V minimum, 35V typical

Undervoltage Shutdown:

12V Models

8V minimum, 8.5V typical

24V Models

16V minimum, 16.5V typical

48V Models

32.5V minimum, 34.5V typical

Overvoltage Shutdown:

12V Models

20V typical, 21V maximum

24V Models

38V typical, 40V maximum

48V Models

78.5V typical, 81V maximum

Reflected (Back) Ripple Current

12mA typical, 20mAp-p maximum

Input Current:

Full Load Conditions

See Ordering Guide

12V and 24V Models

25mA typical, 50mA maximum

48V Models

170mA typical, 200mA maximum

TBD

Remote On/Off Control

Positive Logic (no model suffix)

Off = ground pin to +1.2V maximum

Current

2mA maximum

Negative Logic (N model suffix)

On = ground pin to +1.2V maximum

Current

18mA maximum

Output

VOUT Range

See Ordering Guide

VOUT Accuracy:

3.3V or 5V Output

±1% of VNOM

±12V or ±15V Outputs

±10% of VNOM (See Technical Notes)

Temperature Coefficient

±0.02% of VOUT range/°C

Minimum Loading:

See Technical Notes

3.3V or 5V Output

No minimum load

±12V or ±15V Outputs

20% minimum of nominal output current,

balanced load

Ripple/Noise (20MHz BW)

See Ordering Guide

Line/Load Regulation

See Ordering Guide & Technical Notes

Efficiency

See Ordering Guide

Maximum Capacitive Loading:

3.3V or 5V Output

TBD

±12V or ±15V Outputs

TBD

Isolation:

Input to Output Voltage

1500Vdc minimum

Resistance

100M

Capacitance

470pF

Isolation Safety Rating

Functional insulation

Current Limit Inception: (98% of VOUT)

3.3V Output

5 Amps minimum, 6.2 Amps maximum

5V Output

4 Amps minimum, 5.2 Amps maximum

±12V Outputs

0.36 Amps minimum, 1 Amp maximum

±15V Outputs

0.5 Amps minimum, 1.2 Amps maximum

Short-Circuit Detection:

3.3V or 5V Output

Magnetic feedback

±12V or ±15V Outputs

Magnetic feedback plus voltage clamp

Short-Circuit Potection Method

Current limiting with hiccup autorestore.

Remove overload for recovery.

Short-Circuit Current:

3.3V or 5V Output

2 Amps maximum

±12V or ±15V Outputs

1 Amp maximum

Short Circuit Duration (no damage)

Continuous, output shorted to ground

Overvoltage Protection:

3.3V or 5V Output

3.8Vdc minimum, 4.2Vdc maximum

±12V or ±15V Outputs

30Vdc maximum

Method: magnetic feedback

Dynamic Characteristics

Dynamic Load Response (50-100% loadstep)

3.3V or 5V Output

150μsec to ±1.5% of final value

±12V or ±15V Outputs

150μsec to ±10% of final value

Start-Up Time

VIN to VOUT regulated

TBD msec for VOUT = nominal

Switching Frequency

330kHz ±20kHz

Environmental

Calculated MTBF

TBD

Operating Temperature: (Ambient)

No Derating (Natural convection)

–40 to +65°C

With Derating

See Derating Curves

Operating Case Temperature

–40 to +100°C maximum

Storage Temperature

–40 to +120°C

Thermal Protection/Shutdown

+110°C minimum to 120°C maximum

Density Altitude

0 to 10,000 feet

Relative Humidity

10% to 90%, non-condensing

Physical

Dimensions

See Mechanical Specifications

Case and Header Material

Black Diallyl Phthalate plastic

Pin Dimensions/Material

0.04" (1.016mm) dia. Gold-plated copper

alloy with nickel underplate.

Weight

TBD

Electromagnetic Interference

TBD

Safety

UL/cUL 60950-1 CSA-C22.2 No.234

IEC/EN 60950-1

MDC_TWR22.B02

Page 3 of 9

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Triple Output/TWR Models

Isolated, High Reliability 1" x 2" DC/DC Converters