Isolated and Regulated 40 WATT Modular DC/DC Converters

300 Myles Standish Blvd., Taunton, MA 02780

Ph: 1-800-823-8082

fax: 508-823-8181

WWW.ASTRODYNe.cOM

Astrodyne products are not authorized or warranteed for use

as critical components in life support systems, equipment used

in hazardous environments, nuclear controls systems, or other

mission-critical applications.

Notes:

1.

Maximum output deviation is 10% inclusive of remote sense and him. If remote sense is not being used, the +Vsense should be connected to its cor-

responding +OUTPUT and likewise the sense should be connected to its corresponding -OUTPUT.

2.

Triple outputs requires a minimum 10% loading on the output to maintain specified regulation. Operation under no-load condition will not damage these

devices, however they may not meet all listed specifications

3.

Load regulation for triple output:

Main output (V1): 10 to 100% with 10% to 100% balanced on auxiliaries.

Auxiliary outputs (V2 and V3): 10% to 100% balanced on all outputs.

4.

Cross regulation for triple output:

Main output 100% load, auxiliary 100%, other auxiliary 25% to 100%.

Auxiliary outputs (V2 and V3): main output 100% load, auxiliary 100%, other auxiliary 25% to 100% or main output

25%, auxiliary 25%, other auxiliary 25% to 100%.

5.

The models of FEC40-XXD3305 are specified with a 1uF ceramic output capacitors.

6.

An external filter capacitor is required for normal operation. The capacitor should be capable of handing 1A ripple current for 48V/24V models. Astrodyne

suggests: Nippon chemi-con KMF series, 220µF/100V, ESR 9OmÙ.

7.

Simulated source impedance of 12uH. 12uH inductor in series with +Vin.

8.

The ON/OFF control pin voltage is referenced to negative Input.

9.

Switching frequency for dual output: Master (5Vo) 300KHz; Slave (3.3Vo) 500KHz

10.

BELLCORE TR-NWT-000332. Case I: 50% Stress, Temperature at 4OºC. (Ground fixed and controlled environment).

11.

Heat sink is optional and P/N: 7G-OO26A.

12.

Any condition of dual output (3.3V/5V) rated lout current, not to exceed 8A of total output currents.

13.

Maximum value at nominal input voltage and full load.

14.

Typical value at nominal input voltage and full load.

15.

Test by minimum Vin and constant resistor load.

MecHANIcAL DIMeNSIONS

1. All dimensions in Inches (mm)

Tolerance: X.XX 0.02 (X.X 0.5)

X.XXX 0.01 (X.XX 0.25)

2. Pin pitch tolerance 0.014(0.35)

0.40

(10.2)

0.22 (5.6)

DIA. 0.04

1

2.00 (50.8)

0.40

(10.2)

0.20 (5.1)

0.80 (20.3)

0.60 (15.2)

0.30 (7.6)

0.10 (2.5)

0.50 (12.7)

0.20 (5.1)

4

3

2

8

7 6

5

9

1.10 (27.9)

BOTTOM

VIEW

8(8)

9(9)

TRIM UP

9(9)

7(5)

TRIM DOWN

exTeRNAL OUTPUT TRIMMING

Pin# Single

Dual

Triple

1

+INPUT

+INPUT

+INPUT

2

-INPUT

-INPUT

-INPUT

3

CTRL

CTRL

CTRL

4

NC

3.3V

+AUX

5

-SENSE (note 1)

3.3V RTN (COM)

COMMON

6

+SENSE (note 1)

NC

-AUX

7

+OUTPUT

NC

+OUTPUT

8

-OUTPUT

5V

-OUTPUT (COM)

9

TRIM

5V RTN (COM)

NC