BK-M datasheet(10/20 Pages) GE

10 / 20 page

Lineage Power

Data Sheet

April 2008

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

DW025 Dual Output-Series Power Modules: dc-dc Converters;

Test Conﬁgurations (continued)

8-808(C)

A. Pinout A (DW025AJ-M, BK-M, CL-M) Conﬁgura-

tion

8-809(C)

B. Pinout B (DW025AA-M, AB-M, AF-M, BB-M,

CC-M) Conﬁguration

Note: Use a 0.1 µF ceramic capacitor. Scope measurement should

be made by using a BNC socket. Position the load between

50 mm (2 in.) and 75 mm (3 in.) from the module.

Figure 12. Output Noise Measurement Test Setup

8-753(C)

Note: All measurements are taken at the module terminals. When

socketing, place Kelvin connections at module terminals to

avoid measurement errors due to socket contact resistance.

In addition, VI(–) is internally connected to case.

Figure 13. Output Voltage and Efﬁciency Measure-

ment Test Setup

Design Considerations

Input Source Impedance

The power module should be connected to a low ac-

impedance input source. Highly inductive source

impedances can affect the stability of the power mod-

ule. A 33 µF electrolytic capacitor (ESR < 0.7

Ω at

100 kHz) mounted close to the power module helps

ensure stability of the unit.

VO1(+)

VO2(–)

SCOPE

0.1 µF

COPPER STRIP

0.1 µF

SCOPE

COMM

RLOAD1

RLOAD2

VO1(+)

VO2(–)

SCOPE

0.1 µF

COPPER STRIP

0.1 µF

SCOPE

RLOAD1

RLOAD2

VO1(–)

VO2(+)

VI(+)

I I

I O

SUPPLY

CONTACT

RESISTANCE

CONTACT AND

DISTRIBUTION LOSSES

LOAD

VI(–)

VO1

VO2

COM

LOAD

VOJ

COM

–

[]IOJ

∑

VI +

() VI –

()

–

[]II

-------------------------------------------------- x 100

Pinout A

VOJ +

()

VOJ –

()

–

[]IOJ

∑

VI +

() VI –

()

–

[]II

--------------------------------------------------------------x 100

Pinout B

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