13A/37W , DU AL OUTPUT , MIXED-V OL T A GE DC/DC CONVER TERS

DLV Series

Physical

Dimensions

2" x 2" x 0.5" (50.8 x 50.8 x 12.7mm)

Case Material

Diallyl phthalate, UL94V-0 rated

Pin Material

Brass, solder coated

Weight:

TBD

Primary to Secondary Insulation Level Operational

Absolute Maximum Ratings

Input Voltage:

Continuous:

D12 Models

23 Volts

D2A 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. TBD

minute duration. Fusing recommended.

D12A Models

6 Amps

D24A Models

4 Amps

D48A Models

2 Amps

Output Current

➁

Current limited. Devices can withstand

an indefinite output short circuit.

On/Off Control (Pin 4) Max. Voltages

Referenced to –Input (pin 2)

No Suffix

"N" Suffix

+8 Volts

Sync Control (Pin 3) Max. Voltages

"S" Suffix

+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 Specifications Table is not implied, nor recommended.

4

Figure 2. Trim Connections Using A Trim Pot

Figure 3. Trim Connections To Decrease Output Voltages Using Fixed Resistors

➀ All models are specified with external TBD ceramic output capacitors.

➁ See Technical Notes/Graphs for details.

➂ Devices may be order with opposite polarity. See Part Number Suffixes and Technical Notes

for details.

➃ Applying a voltage to On/Off Control (pin 4) when no input power is applied to the converter

may 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 Trim function for the higher of two voltages available with "T" suffix. See Part Number

Suffixes and Technical Notes for details.

+3.3V

LOAD

–INPUT

ON/OFF

CONTROL

+INPUT

+3.3V OUTPUT

OUTPUT

RETURN

+2.5V OUTPUT

+2.5V TRIM

7

8

1

4

9

5

6

3

2

+2.5V

LOAD

20k

Ω

5-22

TURNS

20k

Ω

5-22

TURNS

+3.3V TRIM *

SYNC *

* OPTIONAL PIN

+3.3V

LOAD

–INPUT

ON/OFF

CONTROL

+INPUT

+3.3V OUTPUT

OUTPUT

RETURN

+2.5V OUTPUT

+2.5V TRIM

7

8

1

4

9

5

6

3

2

+2.5V

LOAD

+3.3V TRIM *

SYNC *

* OPTIONAL PIN

TECHNICAL NOTES

Trimming Output Voltages

These DLV converters have a trim capability (pins 9 & 5) that allow users

to independently adjust the output voltages ±5%. (Note: pin 5 is an option,

see ordering information.) Adjustments to the output voltages can be accom-

plished via a trim pot, Figure 2, or a single fixed resistor as shown in Figures

3 and 4. A single fixed 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 9 to +Output (pin 8), see Figure

3, will decrease the lower output voltage. A resistor connected from Trim pin 9

to Output Return (pin 7) will increase the lower output voltage. See Figure 4.

Similarly, the higher output voltage can be adjusted using a single resistor

connected from the Trim (pin 5) to +Output (pin 6) or to Output Return (pin

7). See Figures 3 and 4.

–25.5

DOWN

(k

Ω) =

L

N

–17.4

DOWN

(k

Ω) =

L

N

2.5 Volt Trim Down

–14.17

DOWN

(k

Ω) =

L

N

1.8 Volt Trim Down

3.3 Volt Trim Down

On/Off Control

The primary-side, remote On/Off Control function (pin 4) can be specified to

operate with either positive or negative polarity. Positive polarity devices (no

suffix) are enabled when pin 4 is left open or pulled high (+TBDV to +TBDV

with respect to –Input). Positive polarity devices are disabled when pin 4 is

pulled low (0-0.8V with respect to –Input). Negative polarity devices are off

when pin 4 is high/open and on when pin 2 is pulled low.

For applications where power sequencing is critical, the DLV series can be

configured such that the On/Off Control pin will enable/disable only the higher

of the two output voltages. Contact DATEL for more information.