DSM Models
15W , DU AL OUTPUT , MIXED-V OL T A GE DC/DC CONVER TERS
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage, balanced "full-load" conditions, unless noted.
➀
Input
Input Voltage Range:
D12 Models
10-18 Volts (12V nominal)
D24 Models
18-36 Volts (24V nominal)
D48 Models
36-75 Volts (48V nominal)
Overvoltage Shutdown:
D12 Models
19-23 Volts (21V nominal)
D24 Models
37-42 Volts (40V typical)
D48 Models
77-81 Volts (78.5V typical)
Start-Up Threshold:
D12 Models
9-10 Volts (9.3V typical)
D24 Models
16.5-18 Volts (17V typical)
D48 Models
34-36 Volts (35V typical)
Undervoltage Shutdown:
D12 Models
7.0-8.5 Volts (8V typical)
D24 Models
16-17 Volts (16.5V typical)
D48 Models
32.5-35.5 Volts (34.5V typical)
Input Current:
Normal Operating Conditions
See Ordering Guide
Standby Mode:
Off, OV, UV, Thermal Shutdown
10mA
Input Reflected Ripple Current:
Source Impedance
<0.1
Ω, no external input filtering
D12 Models
TBD
D24/D48 Models
TBD
Internal Input Filter Type
Capacitive (1.5µF)
Reverse-Polarity Protection:
D12 Models
1 minute duration, 4A maximum
D24 Models
1 minute duration, 2A maximum
D48 Models
1 minute duration, 1A maximum
On/Off Control: (Pin 3):
➂ ➃ ➅
On = open or 13V - +VIN,
IIN @ 13V = 800µA
Off = 0-0.8V, IIN @ 0V = 1mA
Sync: (Option, Pin 4):
➂ ➃
Input Threshold (Rising Edge Active)
1-2.7 Volts
Input Voltage Low
0-0.9 Volts
Input Voltage High
2.8-5 Volts
Input Resistance
35k
Ω minimum
Output High Voltage (100µA load)
3.5-4.8 Volts
Output Drive Current
35mA
Input/Output Pulse Width
160-360nsec
Output
VOUT Accuracy:
5V Output
±2% maximum
3.3V Output
±1.5% maximum
Minimum Loading Per Specification
250mA
Minimum Load For Stability
No load
Ripple/Noise (20MHz BW)
➄
See Ordering Guide
Line/Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide / Efficiency Curves
Cross Regulation:
5V Output
(5V@0.25A, 3.3V@0.25-3A)
TBD
3.3V Output
(3.3V@0.25A, 5V@0.25-2.65A)
TBD
Trim Range
➁
±5%
Isolation Voltage:
Input-to-Output
1500Vdc minimum
Input-to-Case
TBD Vdc minimum
Output-to-Case
TBD Vdc minimum
Output (continued)
Isolation Capacitance
470pF
Isolation Resistance
100M
Ω
Current Limit Inception:
5V @ 95% VOUT (3.3V @ 0.25A)
4-5.5 Amps
3.3V @ 98.5% VOUT (5V @ 0.25A)
3-4 Amps
Short Circuit Current:
5V Output
5.5 Amps average, continuous current
3.3V Output
3 Amps average, continuous current
Overvoltage Protection:
Magnetic feedback
5V Output
TBD Volts
3.3V Output
TBD Volts
Maximum Capacitive Loading:
D12 Models
TBD µF (5V)
TBD µF (3.3V)
D24 Models
TBD µF (5V)
TBD µF (3.3V)
D48 Models
TBD µF (5V)
TBD µF (3.3V)
Temperature Coefficient
±0.02% per °C
Dynamic Characteristics
Dynamic Load Response:
➁
5V (50-100% step to 97.5% VOUT)
300µsec maximum (3.3V @ 0.25A)
3.3V (50-100% step to 98.5% VOUT)
300µsec maximum (5V @ 0.25A)
Start-Up Time:
VIN to VOUT
10msec maximum
On/Off to VOUT
TBD msec maximum
Switching Frequency
250kHz (±25kHz)
Environmental
MTBF:
➆
D12 Models
TBD hours
D24 Models
TBD hours
D48 Models
TBD hours
Operating Temperature: (Ambient):
➁
Without Derating:
+60°C
With Derating
To +100°C (See Derating Curves)
Case Temperature:
Maximum Operational
+100°C
For Thermal Shutdown
TBD °C minimum, TBD°C maximum
Storage Temperature
–40 to +120°C
Physical
Dimensions
2" x 1" x 0.52" (50.8 x 25.4 x 13.2mm)
Internal Case Connection
Case connection via pin 4
Case Material
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
Pin Material
Brass, solder coated, surface-mount leads
Weight TBD ounces
1.4 ounces (39.7 grams)
Primary to Secondary Insulation Level
Operational
➀ Balanced "full-load" is 5V @ 1.5A/3.3V @ 2.25A. All models are specified with external
0.47µF ceramic and 100µF tantalum output capacitors.
➁ See Technical Notes/Graphs for details.
➂ The On/Off Control function can be replaced with a Sync function. See Part Number
Suffixes and Technical Notes for details.
➃ Applying a voltage to On/Off Control (pin 3) when no input power is applied to the
converter can cause permanent damage.
➄ Output noise may be further reduced with the installation of additional external output
capacitors. See Technical Notes.
➅ On/Off control is designed to be driven with open collector or by appropriate voltage
levels. Voltages must be referenced to the –Input (Pin 2).
➆ Demonstrated MTBF available on request.
➇ For conditions with less than minimum loading, outputs remain stable. However, regulation
performance will degrade.
3
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