Triple Output/TWR Models
Isolated, High Reliability 1" x 2" DC/DC Converters
Typical units
FEATURES
±12V/±15V and 3.3V/5V outputs
10-18V, 18-36V or 36-75V inputs
Up to 22.5 Watts total output power with
overtemperature shutdown
To 87% efficiency; 80-100mV Ripple and
Noise
1" x 2" x 0.5" encapsulated package
1500Vdc isolation for both outputs
Designed to meet UL 60950-1, CSA-C22.2
No. 60950-1, EN60950-1 safety approvals
Extensive self-protection with short circuit
shutdown
Output overvoltage and overcurrent
protection
Input under and overvoltage shutdown
Ideal for mixed analog/digital systems
Packaged in 1" x 2" encapsulated modules, the TWR 22W series DC/DC converters offer three
outputs arranged as a unipolar low voltage supply and a higher voltage
bipolar output pair. The unipolar section supplies either +3.3V at 4A maximum or +5V at 3A
maximum. The bipolar outputs are either ±12Vdc at 300mA maximum or ±15Vdc at 250mA
and are ideal for op amps, linear or analog circuits. A single TWR converter can power applica-
tions with combined analog and digital circuits such as a CPU-controlled voice switch, embed-
ded telephone modem or analytical instruments.
The input section is fully isolated from the outputs up to 1500Vdc minimum using Basic insula-
tion. Three wide input ranges are available including 10-18V (12Vdc nominal), 18-36V (24Vdc
nomimal) or 36-75V (48Vdc nominal). Peak-to-peak output ripple/noise is typically 80-100mV
at full load. Efficiencies range up to 87%.
The TWR 22W series outputs will limit their current if driven to overload and may be short
circuited indefinitely without damage. The inputs will shut down if input voltage is either over or
under limits or has reversed input voltage. These converters will operate at higher temperatures
with adequate airflow.
The unipolar output features line and load regulation of ±1%. Excellent dynamic response
assures transient load change settling within 100 microseconds. Other convenience features
include a remote On/Off control to turn the outputs on via digital logic, CPU bit, control transis-
tor or a relay.
Fabrication uses DATEL’s advanced surface mount automated pick-and-place assembly and
computer-controlled parameter testing. All TWR 22W series are designed to meet safety
requirements in UL, EN60950-1 and CSA-C22.2 No.60950-1.
Figure 1. Simplified block diagram
For full details go to
www.murata-ps.com/rohs
Typical topography is shown.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_TWR22.B02
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