rev.

page

date

DESCRIPTION: dc-dc converter

2 of 4

06/2009

20050

phone

phone 503.612.2300 fax

fax 503.612.2382

PART NUMBER: PTK25

INPUT

parameter

conditions/description

min

nom

max

units

input voltage range

18

24

36

VDC

36

48

72

VDC

remote on/off control

2.5V

(open)

5.5V

output turn-off

0V

(short)

0.8V

switching frequency

constant

300

KHz

NOTE: 3 output defaults to “on” when there is no connection to the “CNT” pin.

OUTPUT

parameter

conditions/description

min

nom

max

units

output trim range

with external trim resistors

-5%

+5%

set point accuracy

single output

-2%

+2%

dual output

-3%

+3%

line regulation

single output models

-0.25%

+0.25%

(low line to high line)

dual output models

-2.5%

+2.5%

triple: main output (Vout)

-0.25%

+0.25%

auxillary outputs (+Vaux / -Vaux)

-5%

+5%

load regulation

single output models- no load to full load

-0.25%

+0.25%

dual output models- balanced loads

-2.5%

+2.5%

triple: main output (Vout)

-0.25%

+0.25%

auxillary outputs (+Vaux / -Vaux)- with 10%

-5%

+5%

load on Vout and balanced loads on+Vaux and -Vaux

minimum load

converters will not be damaged if loading conditions are less than minimum specified loads,

ripple and noise

see chart

NOTE: 4 single output: no min. load required, dual: 10%, triple: balanced loads

PROTECTION

parameter

conditions/description

min

nom

max

units

over-current

105%

135%

over-voltage

110%

140%

NOTE: 5 continuous operation in a protected state may compromise long-term reliability.

GENERAL

parameter

conditions/description

min

nom

max

units

efficiency

typical at full load

77%

83%

isolation voltage

input/case, input/output, output/case

500

VAC

insulation resistance

at 500 VDC

100M

Ohms

agency standards

approved to UL60950(E222889), CSA C22.2 No. 60950, TUV EN60950 (single output only)

case material

Zn

material flammability

94 V-0

weight

80

grams

(2.82)

(ounces)

MTBF

MIL-HDBK-217F

470k

hours

operating temperature

regular models - see derating curve.

-20

+71

°C

extended temperature models

-40

+85

°C

storage temperature

-40

+105

°C

humidity

operating (non-condensing)

5%

95%

RH

washability

not intended for aqueous wash