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LW025F

LW025 Single-Output-Series Power Modules: 36 Vdc to 75 Vdc Inputs; 25 W

Tyco Electronics 

Advance Data Sheet

March 1999

LW025 Single-Output-Series Power Modules:

36 Vdc to 75 Vdc Inputs; 25 W

Electrical Specifications (continued)

Table 2. Output Specifications

Parameter

Output Voltage Set Point

(VI = 48 V; IO = IO, max; TC = 25 °C)

Output Voltage

(Over all line, load, and temperature conditions

until end of life; see Figure 12.)

Output Regulation:

Line (VI = 36 V to 75 V)

Load (IO = IO, min to IO, max)

Temperature (TC = –40 °C to +100 °C)

Output Ripple and Noise (See Figure 11.):

RMS

Peak-to-peak (5 Hz to 20 MHz)

Output Current

(At IO < IO, min, the modules may exceed output

ripple specifications.)

Output Current-limit Inception

(VO = 90% x VO, set; see Figures 3 and 4.)

Output Short-circuit Current (VO = 250 mV)

Efficiency

(VI = VI, nom; IO = IO, max; TC = 25 °C; see Figures 5,

6, and 12.)

Switching Frequency

Dynamic Response

(ýIO/ýt = 1 A/10 µs, VI = VI, nom, TA = 25 °C):

Load Change from IO = 50% to 75% of IO, max:

Peak Deviation

Settling Time (VO < 10% peak deviation)

Load Change from IO = 50% to 25% of IO, max:

Peak Deviation

Settling Time (VO < 10% peak deviation)

Device

LW025F

LW025A

LW025F

LW025A

Symbol

VO, set

VO, set

VO

VO

All

—

All

—

All

—

All

—

All

—

All

IO

All

IO

All

IO

LW025F

η

LW025A

η

All

—

All

—

All

—

All

—

All

—

Min

3.25

4.92

3.17

4.85

—

—

—

—

—

0.4

103

—

75

77

—

—

—

—

—

Typ

3.3

5.0

—

—

0.01

0.05

0.5

—

20

—

—

135

77

79

256

1

0.5

1

0.5

Max Unit

3.35 Vdc

5.08 Vdc

3.43 Vdc

5.15 Vdc

0.1

%VO

0.4

%VO

1.0

%VO

40 mVrms

100 mVp-p

5.0

A

150 %IO, max

200 %IO, max

—

%

—

%

—

kHz

—

%VO, set

—

ms

—

%VO, set

—

ms

Table 3. Isolation Specifications

Isolation Capacitance

Isolation Resistance

Parameter

Min

Typ

Max

Unit

—

0.002

—

µF

10

—

—

M¾

General Specifications

Parameter

Calculated MTBF (IO = 80% of IO, max; TC = 40 °C)

Weight

Min

Typ

Max

Unit

5,500,000

hours

—

—

54 (1.9)

g (oz.)

Tyco Electronics Corp.

3

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