Datasheet DSM-5-2.65-3.3-3-D48S, DSM-5-2.65-3.3-3-D24S Datasheet (DATEL)

Surface-Mount, 3.3V and 5V

15Watt, DC/DC Converters

Dual Output

Mixed Voltage, DSM Models

Features

Figure 1. Simplifi ed Schematic

INNOVATION and EX C ELL E N C

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Regulated 5V and 3.3V outputs

5V @ 2.65Amps/ 3.3V @ 3 Amps capability

15 Watts total output power

Small 1" x 2" x 0.52" SMT package

Available input voltage ranges:
10-18V, 18-36V or 36-75V

No-load stable operation

UL1950 and EN60950 safety approvals

mark available (75V-input models)

Continuous short-circuit protection

Fully isolated, 1500Vdc guaranteed

–40 to +100°C operating temperature

Input under and overvoltage shutdown

Output OVP, thermal shutdown

DATEL, Inc., Mansfi eld, MA 02048 (USA) · Tel: [phone] Fax: [phone] · Email: [e-mail] · Internet: www.datel.com

For surface-mount applications requiring 15 Watts of power from 5V and 3.3V,

DATEL offers a new power sharing DC/DC converter capable of meeting your
output current requirements. The DSM-5/2.65-3.3/3-D48 (36-75V input), DSM­5/2.65-3.3/3-D24 (18-36V input) and DSM-5/2.65-3.3/3-D12 (10-18V input) are fully
isolated DC/DC converters capable of delivering any combination of 5V and 3.3V
output current up to a combined total of 15 Watts of output power.

Housed in a 1" x 2" x 0.52" metal, surface-mount package coated with
electrically non-conductive fi nish, these converters are regulated by a 3.3V control
loop that provides load regulation of ±0.5% for 3.3V output and ±2% for 5V
output. All models include input Pi fi ltering, input overvoltage and undervoltage
shutdown circuitry, output overvoltage protection, output short-circuit and current­limiting protection, and thermal shutdown. All models provide trim capability and
an on/off control function or sync control. Fully synchronous output rectifi cation
provides high effi ciency (86%) and a stable output under no-load conditions.

DSM power sharing modules offer low output ripple and noise perfor­mance, 1500 Vdc isolation voltage, and are fully specifi ed for –40 to +100°C
operation. These devices meet IEC950, UL1950 and EN6950 safety stan­dards; CB reports are available on request. "D48" models are CE marked
(meets LVD requirements)

.

+INPUT

–INPUT

SWITCH

CONTROL

+5V OUTPUT

+3.3V OUTPUT

OUTPUT
RETURN

TRIM

PWM

CONTROLLER

REFERENCE &

ERROR AMP

OPTO

ISOLATION

ON/OFF

CONTROL

(SYNC)

UV & OV

COMPARATORS

THERMAL

SHUTDOWN

PRELIMINARY

15W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

XWR Series

Performance Specifi cations and Ordering Guide

➀

PART NUMBER STRUCTURE

V1 Nominal Output Voltage:
5 Volts

5

DSM

2.65-

/

D48-

Input Voltage Range:

D12 = 10-18 Volts (12V nominal)

D24 = 18-36 Volts (24V nominal)

D48 = 36-75 Volts (48V nominal)

I

1 Maximum Output Current:

2.65 Amps

Dual Output/
Surface-Mount Series

3.3 3

/

-

S

V2 Nominal Output Voltage:

3.3 Volts

I2 Maximum Output Current:

3 Amps

Add "S" suffi x as desired

Part Number Suffi xes

DSM 15 Watt DC/DC's are designed so an On/Off Control function

with either positive polarity (no suffi x), or a Sync function ("S" suffi x)

can be added in the pin 3 position.

No Suffi x On/Off Control function (positive polarity) on pin 3

S Sync function on pin 3

➀ Typical at TA = +25°C under nominal line voltage and balanced "full-load" conditions (5V @ 1.5A/3.3V @ 2.25A).
➁ Any combination of 5V/3.3V rated I

OUT current, not to exceed 15 Watts of output power. (See derating graphs.)

➂ Ripple/Noise (R/N) measured over a 20MHz bandwidth. All models are specifi ed with 0.47µF ceramic
in parallel with 100µF tantalum output capacitors.

Output

Input

➃ Tested from 10% to 100% full load (other output at 10% full load).
➄ Nominal line voltage, no load/balanced full-power condition.

MEC ANICAL SPECIFI CATIONS

2

I/O Connections

Pin Function P36

1 +Input

2 –Input

3 On/Off Control

4 Case

5 +5V Output

6 NC

7 Output Output

8 +3.3V Output

9 Trim

Case C18A

R/N (mVp-p) ➂ Regulation (Max.) Effi ciency

Packag e

V

OUT IOUT ➁ VIN Nom. Range IIN ➄ (Case,

Model (Volts) (Amps) Typ. Max. Line Load ➃ (Volts) (Volts) (mA) Min. Typ. Pinout)

DSM-5/2.65-3.3/3-D12

5 2.65 40 75 ±1% ±2%

12 10-18 70/1450 83% 86% C18A, P36

3.3 3 60 100 ±0.5% ±0.5%

DSM-5/2.65-3.3/3-D24

5 2.65 40 75 ±1% ±2%

24 18-36 40/720 83% 86% C18A, P36

3.3 3 60 100 ±0.5% ±0.5%

DSM-5/2.65-3.3/3-D48

5 2.65 40 75 ±1% ±2%

48 36-75 20/360 83% 86% C18A, P36

3.3 3 60 100 ±0.5% ±0.5%

2.00

(50.80)

0.50

(12.70)

METAL
CASE

INSULATED BASE

4

3

2

1

8

7

6

5

9

0.10

(2.54)

0.110
(2.79)

0.100
(2.54)

0.300
(7.62)

0.500

(12.70)

TOP VIEW

1.00

(25.40)

0.800

(20.32)

4 EQ. SP. @

0.200 (5.08)

0.055
(1.40)

0.020
(0.51)

0.110
(2.79)

0.015
(0.38)

DSM Models

15W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

Performance/Functional Specifi cations

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 Refl ected Ripple Current:

Source Impedance <0.1Ω, no external input fi ltering

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,

I

IN @ 13V = 800µA

Off = 0-0.8V, I

IN @ 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 35kΩ 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 Specifi cation 250mA

Minimum Load For Stability No load

Ripple/Noise (20MHz BW)

➄ See Ordering Guide

Line/Load Regulation See Ordering Guide

Effi ciency See Ordering Guide / Effi ciency Cur ves

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 100MΩ

Current Limit Inception:

5V @ 95% V

OUT (3.3V @ 0.25A) 4-5.5 Amps

3.3V @ 98.5% V

OUT (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 Coeffi cient ±0.02% per °C

Dynamic Characteristics

Dynamic Load Response: ➁

5V (50-100% step to 97.5% V

OUT) 300µsec maximum (3.3V @ 0.25A)

3.3V (50-100% step to 98.5% V

OUT) 300µsec maximum (5V @ 0.25A)

Start-Up Time:

V

IN to VOUT 10msec maximum

On/Off to V

OUT 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 fi nish 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 specifi ed 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

Suffi xes 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

15W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

XWR Series

4

Absolute Maximum Ratings

Input Voltage:

Continuous: D12 Models 23 Volts
D24 Models 42 Volts
D48 Models 81 Volts
Transient (100msec): D12 Models 25 Volts
D24 Models 50 Volts
D48 Models 100 Volts

Input Reverse-Polarity Protection:

➁ Input Current must be limited. 1 minute

duration. Fusing recommended.
D12 Models 4 Amps
D24 Models 2 Amps
D48 Models 2 Amps

Output Current

➁ Current limited. Devices can withstand

an indefi nite output short circuit.

On/Off Control (Pin 3) Max. Voltages:
Referenced to –Input (pin 2)
No Suffi x +V

IN

S Suffi x +5.7 Volts

Storage Temperature –40 to +120°C

Lead Temperature (Soldering, 10 sec.) +300°C

These are stress ratings. Exposure of devices to any of these conditions may adversely

affect long-term reliability. Proper operation under conditions other than those listed in the

Performance/Functional Specifi cations Table is not implied, nor recommended.

TECHNICAL NOTES

Trimming Output Voltages

The DSM converters have a trim capability (Pin 9) that allow users to

adjust the output voltages ±5%. A trim adjustment will cause an equal

percentage of change in both outputs.

Adjustments to the output voltages

can be accomplished via a trim pot, Figure 2, or a single fi xed resistor as

shown in Figures 3 and 4. A single fi xed resistor can increase or decrease

the output voltage depending on its connection. Fixed resistors should have

absolute TCR's less than 100ppm/°C to minimize sensitivity to changes in

temperature.

A single resistor connected from the Trim pin (Pin 9) to the +3.3V Output

(Pin 8), see Figure 3, will decrease the output voltages. A resistor connected

from the Trim pin (Pin 9) to Output Return (Pin 7) will increase the output

voltages.

Trim adjustments greater than 5% can have an adverse effect on the convert-

er's performance and is not recommended.

Figure 2. Trim Connections Using A Trimpot

DOWN

3.3 – VO

RT (kΩ) =

–16.9

2.49(VO – 1.234)

20kΩ
5-22
Tu rn s

+INPUT

+5V OUTPUT

+3.3V OUTPUT

TRIM

OUTPUT
RETURN

–INPUT

CASE

1

2

4

ON/OFF
CONTROL

3

5

9

7

+5V LOAD

+3.3V LOAD

8

+5V LOAD

+3.3V LOAD

R TRIM

DOWN

+INPUT

+5V OUTPUT

+3.3V OUTPUT

TRIM

OUTPUT
RETURN

–INPUT

CASE

1

2

4

ON/OFF
CONTROL

3

5

9

7

8

+5V LOAD

+3.3V LOAD

R TRIM

UP

+INPUT

+5V OUTPUT

+3.3V OUTPUT

TRIM

OUTPUT
RETURN

–INPUT

CASE

1

2

4

ON/OFF
CONTROL

3

5

9

7

8

Figure 3. Decrease Output Voltage Trim Connections

Using A Fixed Resistor

Figure 4. Increase Output Voltage Trim Connections

Using A Fixed Resistor

Accuracy of adjustment is subject to tolerances or resistor values

and factory-adjusted output accuracy.

V

O = desired output voltage.

RT (kΩ) =

UP

VO – 3.3

–16.9

3.073

Output Power (Watts)

Ambient Temperature (˚C)

–40 0 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100

16

14

12

10

8

6

4

2

0

Output Power vs. Ambient Temperature

V

IN = Nominal, Natural Convection Air flow

DSM Models

15W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

5

Typical Performance Curves

D12 Models D24 Models

90

85

80

75

70

65

60

DSM-5/2.65-3.3/3-D12 - Typical 3.3 V

OUT Efficiency vs. Load

(+5V @ 250mA)

+3.3V Output Current (Amps)

Efficiency (%)

V

IN

= 18V

V

IN

= 12V

V

IN

= 10V

0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3

90

85

80

75

70

65

60

DSM-5/2.65-3.3/3-D12 - Typical 5 V

OUT Efficiency vs. Load

(+3.3V @ 250mA)

+5V Output Current (Amps)

Efficiency (%)

V

IN

= 18V

V

IN

= 12V

V

IN

= 10V

0.3 0.5 0.8 1.1 1.3 1.6 1.9 2.1 2.4 2.7

88

87

86

85

84

83

82

81

80

DSM-5/2.65-3.3/3-D12 - Efficiency vs. Line and Load

10 10.89 11.78 12.67 13.56 14.44 15.33 16.22 17.11 18

Input Voltage (Volts)

Efficiency (%)

V

OUT

= 5V@0.25A/3.3V@3A

V

OUT

= 5V@1.5A/3.3V@2.25A

V

OUT

= 5V@2.65A/3.3V@0.25A

90

85

80

75

70

65

60

DSM-5/2.65-3.3/3-D24 - Typical 3.3 V

OUT Efficiency vs. Load

(+5V @ 250mA)

+3.3V Output Current (Amps)

Efficiency (%)

V

IN

= 36V

V

IN

= 24V

V

IN

= 18V

0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3

0.3 0.5 0.8 1.1 1.3 1.6 1.9 2.1 2.4 2.7

90

85

80

75

70

65

60

DSM-5/2.65-3.3/3-D24 - Typical 5 V

OUT Efficiency vs. Load

(+3.3V @ 250mA)

+5V Output Current (Amps)

Efficiency (%)

V

IN

= 36V

V

IN

= 24V

V

IN

= 18V

88

87

86

85

84

83

82

81

80

DSM-5/2.65-3.3/3-D24 - Efficiency vs. Line and Load

18 20 22 24 26 28 30 32 34 36

Efficiency (%)

V

OUT

= 5V@0.25A/3.3V@3A

V

OUT

= 5V@1.5A/3.3V@2.25A

V

OUT

= 5V@2.65A/3.3V@0.25A

Input Voltage (Volts)

15W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

XWR Series

Typical Performance Curves

D48 Models

90

85

80

75

70

65

60

DSM-5/2.65-3.3/3-D48 - Typical 3.3 V

OUT Efficiency vs. Load

(+5V @ 250mA)

+3.3V Output Current (Amps)

Efficiency (%)

V

IN

= 48V

V

IN

= 60V

V

IN

= 75V

V

IN

= 36V

0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 3

90

85

80

75

70

65

60

DSM-5/2.65-3.3/3-D48 - Typical 5 V

OUT Efficiency vs. Load

(+3.3V @ 250mA)

0.3 0.5 0.8 1.1 1.3 1.6 1.9 2.1 2.4 2.7

+5V Output Current (Amps)

Efficiency (%)

V

IN

= 48V

V

IN

= 60V

V

IN

= 75V

V

IN

= 36V

88

87

86

85

84

83

82

81

80

DSM-5/2.65-3.3/3-D48 - Efficiency vs. Line and Load

36 40.3 44.7 49 53.3 57.7 62 66.3 70.7 75

Input Voltage (Volts)

Efficiency (%)

V

OUT

= 5V@0.25A/3.3V@3A

V

OUT

= 5V@1.5A/3.3V@2.25A

V

OUT

= 5V@2.65A/3.3V@0.25A

Start-Up from VIN

(VIN = nominal, 5V @ 1.5A/3.3V @ 2.25A,

0.47µF  100µF tantalum output capacitors.)

2msec/div

VIN

5VOUT

3.3VOUT

D12, 24, 48 Models

DSM Models

15W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

7

DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descr iptions contained herein do
not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

DATEL (UK) LTD. Tadley, England Tel: [phone]

DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: [phone]
DATEL GmbH München, Germany Tel: [phone]
DATEL KK Tokyo, Japan Tel: [phone], Osaka Tel: [phone]

DATEL, Inc. 11 Cabot Boulevard, Mansfi eld, MA 02048-1151
Tel: [phone] [phone] Fax: [phone]
Internet: www.datel.com Email: [e-mail]

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INNOVATION and EX C ELL E N C

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