Safety
General
The PKE 4000 I Series DC/DC power
modules are designed in accordance with
EN 60 950 Safety of information technology
equipment including electrical business equip-
ment, and certified by SEMKO.
Absolute Maximum Ratings
Characteristics
min
max
Unit
TC
Case temperature @ max output power1)
+115
°C
The isolation is an operational insulation
in accordance with EN 60 950.
TS
VI
Storage temperature
Input voltage
–
55
+125
+75
°C
–
0.5
V dc
The PKE DC/DC power modules are re-
cognized by UL and meet the applicable
requirements in UL 1950 Safety of
Isolation voltage
(input to output test voltage)
1,500
V
ISO
V dc
information technology equipment, the
VRC
Vadj
Remote control voltage pin 1
Output adjust voltage pin 10
Transient input energy @ TA = +25°C
0
0
+5
VO
Vdc
Vdc
Ws
applicable Canadian safety requirements
and UL 1012 Standard for power supplies.
The DC/DC power module shall be
installed in an end-use equipment and is
V
tr
1.3
intended to be supplied by isolated
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings, sometimes
referred to as no destruction limits, are normally tested with one parameter at a time exceeding the limits of Output
data or Electrical Characteristics. If exposed to stress above these limits, function and performance may degrade in an
unspecified manner.
secondary circuitry and shall be installed
in compliance with the requirements of
the ultimate application. When the
supply to the DC/DC power module meets
all the requirements for SELV (<60Vdc),
the output is considered to remain within
SELV limits (level 3). If connected to a
60 V DC power system, reinforced
insulation must be provided in the power
supply that isolates the input from the ac
mains. Single fault testing in the power
supply must be performed in combination
with the DC/DC power module to
Input TC < TC max
Characteristics
Input voltage range2)
Conditions
min
typ
max
Unit
V
V
I
38
72
V
Turn-off input voltage
Turn-on input voltage
(See Operating Information)
(See Operating Information)
32
33
V
I
off
V
Ion
V
Equivalent inrush
current resistance
rIrush
30
mW
demonstrate that the output meets the
requirement for SELV. One pole of the
input and one pole of the output is to be
grounded or both are to be kept floating.
CI
Id
Input capacitance
1.8
15
mF
Quiscent drain current
I
O =0,TC= –0...+95°C
30
mA
The terminal pins are only intended for
connection to mating connectors of
internal wiring inside the end-use
equipment.
Environmental Characteristics
Characteristics
Test procedure & conditions
Frequency
Amplitude
Acceleration
Number of cycles
10…500 Hz
0.75 mm
10 g
These DC/DC power modules may be used
in telephone equipment in accordance
with paragraph 34 A.1 of UL 1459
(Standard for Telephone Equipment,
second edition).
Vibration
IEC 68-2-6 Fc
(Sinusoidal)
10 in each axis
Peak acceleration
Shock duration
200 g
3 ms
Shock
IEC 68-2-27 Ea
(Half sinus)
The isolation voltage is a galvanic
isolation and is verified in an electric
strength test. Test voltage between input
and output is 1,500 V dc.
IEC 68-2-29 Eb
Peak acceleration
Bump duration
Number of bumps
40 g
6 ms
Bump
(Half sinus)
1000 in 6 directions
Temperature
Number of cycles
–40°C…+125°C
10
Temperature
change
IEC 68-2-14 Na
IEC 68-2-3 Ca
The capacitor between input and output
has a value of 4.7 nF and the leakage
current is less than 1mA @ 50 Vdc.
Temperature
Duration
40°C
56 days
Damp heat
Flammability ratings of the terminal
support and internal plastic construction
details meet UL 94V-0.
Temperature
Humidity
Duration
85°C
85% RH
500 hours
IEC 68-2-3 Ca
with bias
Heat/humidity
Notes:
1) Corresponding ambient temp. range (TA) at full output power is –45 to +85°C. (Exceptions: PKE 4210 PI
= –45 to +75 °C, PKE 4411PI and PKE 4431 PI = –45 to +60°C.)
2) The input voltage range 38...72 V meets the requirements in the European Telecom Standard prETS 300 132-2
for Normal input voltage range in 48 V and 60 V DC power systems, –40.5...–57.0 V and –50.0...–72.0 V respec-
tively. At input voltages exceeding 72 V (abnormal voltage) the power loss will be higher than at normal input voltage
and TC must be limited to max +90°C. Absolute max continuous input voltage is 75 V dc. Output characteristics will
be marginally affected at input voltages exceeding 72 V.
EN/LZT 146 26 R1A (Replaces EN/LZT 137 31 R1) © Ericsson Microelectronics AB, June 2000
2
ERICSSON [ ERICSSON ]
