TWR Series
30W, Triple Output DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage, full-load conditions, unless noted. ꢁ
Output (continued)
Input
Short Circuit Current:
3.3V Output
Input Voltage Range:
Dꢀ4 Models
D48 Models
ꢀ.5 Amps average, continuous
ꢀ.0 Amps average, continuous
18-3ꢁ Volts (ꢀ4V nominal)
3ꢁ-75 Volts (48V nominal)
1ꢀV/ 15V Output
Overvoltage Protection: ꢂ
3.3V Output
Magnetic feedback, transorb
4.ꢀVdc
30Vdc ( 15V differential)
3ꢁVdc ( 18V differential)
Overvoltage Shutdown:
Dꢀ4 Models
D48 Models
37-40 Volts (38V nominal)
77-81 Volts (79V nominal)
1ꢀV Output
15V Output
Start-Up Threshold: ꢂ
Dꢀ4 Models
D48 Models
Maximum Capacitive Loading:
3.3V Models
5V Models
1ꢁ-18 Volts (17V nominal)
34-3ꢁ Volts (35V nominal)
1000μF
ꢁ80μF
Undervoltage Shutdown: ꢂ
Dꢀ4 Models
D48 Models
1ꢁ-17.5 Volts (1ꢁ.5V nominal)
3ꢀ-35.5 Volts (34.5V nominal)
Dynamic Characteristics
Dynamic Load Response:
3.3V (50-100% step to ꢀ%VOUT)
Input Current:
Normal Operating Conditions
Standby Mode:
Off, OV, UV, Thermal Shutdown
300μsec maximum
See Ordering Guide
10mA
1ꢀV/ 15V (50-100% step to ꢀ%VOUT) 300μsec maximum
Start-Up Time: ꢂ
VIN to VOUT:
Input Reflected Ripple Current:
Source Impedance:
Dꢀ4 Models
3.3V
1ꢀV/ 15V
On/Off to VOUT
10msec
15msec
10msec
ꢀ00mAp-p max., 140mAp-p (typ.)
ꢀ00mAp-p max., 140mAp-p (typ.)
D48 Models
Switching Frequency
350kHz ( 30kHz)
Internal Input Filter Type
Pi (0.039μF - ꢀ.ꢀμH - 3.3μF)
Environmental
Reverse-Polarity Protection: ꢂ
Dꢀ4 Models
D48 Models
MTBF: ꢈ
Dꢀ4 Models
D48 Models
1 minute duration, 4A maximum
1 minute duration, ꢀA maximum
TBC
TBC
On/Off Control (Pin 4) ꢂꢃꢄꢅ
On = open or 13V to +VIN,
IIN = 50μA @ 13V
Off = 0-0.8V, IIN = 1mA @ 0V
Operating Temperature (Ambient): ꢂ
Without Derating:
Dꢀ4 Models
–40 to +55°C
–40 to +55°C
Output
D48 Models
With Derating
To +100°C (See Derating Curves)
VOUT Accuracy:
3.3V Output
1.5%
ꢀ%
Case Temperature:
Maximum Operational
For Thermal Shutdown
1ꢀV/ 15V Output
+100°C
+110°C minimum, +118°C maximum
Ripple/Noise (ꢀ0MHz BW) ꢆ
Line/Load Regulation
Efficiency
See Ordering Guide
See Ordering Guide
See Ordering Guide
Storage Temperature
–40 to +1ꢀ0°C
Physical
Dimensions
Case Material
Pin Material
Weight:
ꢀ" x ꢀ" x 0.5" (50.8 x 50.8 x 1ꢀ.7mm)
Diallyl phthalate, UL94V-0 rated
Gold plate over copper alloy
ꢀ.47 ounces (70g)
Minimum Loading Per Specification:
+3.3V Output
10% of IOUT maximum
30mA
1ꢀV/ 15V Output
Minimum Loading For Stability ꢇ
No load
Isolation Voltage:
Input-to-Output
Input-to-Case
Primary to Secondary Insulation Level Basic
1500Vdc minimum
Plastic case
Plastic case
ꢁAll models are specified with external 0.2μF ceramic output capacitors.
ꢂSee Technical Notes/Graphs for details.
Ouput-to-Case
Isolation Capacitance
Isolation Resistance
Current Limit Inception:
470pF
ꢃThe On/Off control function can be replaced with a Sync function. See Part Number Suffixes
and Technical Notes for details.
100MΩ
ꢄApplying a voltage to On/Off Control (pin 4) when no input power is applied to the converter
can cause permanent damage.
3.3V @ 97%VOUT ( 1ꢀ/ 15V @ IOUT max.) 5.8-7.5 Amps (model dependent)
ꢆOutput noise may be further reduced with the installation of additional external output
capacitors. See Technical Notes.
1ꢀV @ 97%VOUT (+3.3V @ IOUT max.)
15V @ 97%VOUT (+3.3V @ IOUT max.)
0.8ꢀ5-1.35 Amps
0.ꢁꢀ5-1.15 Amps
ꢅOn/Off control is designed to be driven with open collector or by appropriate voltage
levels. Voltages must be referenced to the input return pin (–Input).
ꢈDemonstrated MTBF available on request.
Temperature Coefficient
0.0ꢀ% per °C
ꢇFor conditions with less than minimum loading, outputs remain stable. However, regulation
performance will degrade.
www.murata-ps.com
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
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