PKA 2000 I
25–40 W DC/DC Power Modules
24 V Input Series
•
Single, dual and triple output
•
500 V dc isolation voltage
•
MTBF >2 million hours @75 °C
case temperature
• Complete, no extra filters or
heatsinks required
The 25-40 watts PKA 2000 series hybrid DC/DC
power modules are especially designed for
decentralized 24/28 Vdc system distributed onboard
DC/DC coverters. By using a thickfilm thecknology,
which provides a high degree of intergration as well
as efficient thermal management, and by utilizing a
300 kHz switching frequency, these highly reliable
products comply to demanding applications within
e.g. cellular radio, medical, industrial and airborne
industri. Input to output isolation is 500 Vdc .
Mechanical ruggedness – in conformance with IEC
68-2 - is close to requirements for discrete
components. Extreme temperature conditions can be
met since the converters can operate with full output
power in ambient temperatures ranging from –45 to
+85 °C or up to +115 °C case temperature, making
the products ideal also for applications within various
non-controlled environments.
The PKA series is manufactured using highly
automated manufacturing lines with a world-class
quality commitment and a five-year warranty.
Ericsson Microelectronics AB has been an ISO 9001
certified supplier since 1991.
For a complete product
program please reference the back cover.
E
General
Absolute Maximum Ratings
Characteristics
T
C
T
S
V
I
V
ISO
Case temperature
1)
Storage temperature
Input voltage
Isolation voltage (input to output test voltage)
Transient input energy @ T
A
= +25 °C
V
RC
V
adj
1)
min
– 45
– 55
– 0.5
500
1.3
0
0
max
+115
+125
36
Unit
°C
°C
V dc
V dc
Ws
Stress in excess of Absolute Maximum
Ratings may cause permanent damage.
Absolute MaximumRatings, 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.
Remote control voltage (pin 9)
Output adjust voltage (pin 10)
5
V
O
V
V
Safety
The PKA 2000 I Series DC/DC power
modules are designed in accordance with
EN 60 950,
Safety of information technology
equipment including electrical business equipment
and certified by SEMKO.
The PKA power modules are recognized by
UL and meet the applicable requirements in
UL 1950
Safety of information technology equip-
ment,
the applicable Canadian safety require-
ments and UL 1012
Standard for power sup-
plies.
The DC/DC power module shall be installed
in an end-use equipment and considerations
should be given to measuring the case tem-
perature to comply with T
C max
when in
operation. They are intended to be supplied
by isolated secondary circuitry and shall be
installed in compliance with the require-
ments of the ultimate application. If con-
nected to a 24 V DC power system reinforced
insulation must be provided in the power
supply that isolates the input from the ac
mains. The isolation in the DC/DC power
module is an operational insulation in accord-
ance with EN 60 950. One pole of the input
and one pole of the output is to be grounded
or both are to be kept floating.
The terminal pins are only intended for con-
nection to mating connectors of internal
wiring inside the end-use equipment.
The isolation voltage is a galvanic isolation
and is verified in an electric strength test.
Test voltage (V
ISO
) between input and output
is 500 V dc.
The capacitor between input and output has a
value of 10 nF and the leakage current is less
than 1
m
A @ 26 V dc.
Flammability ratings of the terminal support
and internal plastic construction details
meets UL 94V-0.
Corresponding ambient temp. range (T
A
) at full output power is –45 to +85 °C.
Input T
C
< T
C max
Characteristics
Conditions
T
C
< T
C max
V
I
Input voltage range
T
C
< + 95 °C
V
Ioff
I
I rush
I
I 2t
P
Ii
Input idling power
Input transient peak
current (transient
immunity)
PKA 2411 PIL = 30 A, 2×10
-3
A
2s
*)
PKA 2432 PIL = 30 A, 5×10
-3
A
2s
2)
min
19
19
13
typ
max
32
35
18
Unit
V
V
V
A
A
2 s
W
Turn-off input voltage
Inrush current
2)
(See Operating Information)
15
I
O
= I
Onom
5×10
-4
I
O
=0,T
C
= 0...+95°C
P< 1 kW, V
C
< 50 V,
t
r
/t
d
=10/1000
ms
0.8
20
A
Environmental Characteristics
Characteristics
Test procedure & conditions
Frequency
Amplitude
Acceleration
Number of cycles
Peak acceleration
Shock duration
Peak acceleration
Bump duration
Number of bumps
Temperature
Number of cycles
Temperature
Duration
Temperature
Humidity
Duration
10–500 Hz
0.75 mm
10 g
10 in each axis
200 g
3 ms
40 g
6 ms
1000 in 6 directions
–40°C to +125°C
10
40°C
56 days
85°C
85% RH
500 hours
Vibration
(Sinusoidal)
IEC 68-2-6 F
c
Shock
(Half sinus)
Bump
(Half sinus)
IEC 68-2-27 E
a
IEC 68-2-29 E
b
Temperature
change
Damp heat
IEC 68-2-14 N
a
IEC 68-2-3 C
a
Accelerated
damp heat
IEC 68-2-3 C
a
with bias
2
EN/LZT 146 09 R1A © Ericsson Microelectronics AB, June 2000
Mechanical Data
On-Card
Off-Card
Dimensions in mm (in)
Connections
Pin
1
2
3
4
5
6
Designation
RC
NC
–In
+In
Aux
NC
–Out 2
–Out 3
NC
+Out 2
–Out 1/Rtn
+Out 1
V
adj
Function
Remote control. To turn-on and turn-off the output. It is also used to
adjust the turn-off input voltage threshold.
Not connected.
Negative input.
Positive input.
Auxiliary.
Not connected in singles.
Negative output 2 in duals.
Negative output 3 in triples.
Not connected in singles.
Positive output 2 in duals and triples.
Negative output 1 in singles and duals. Output return in triples.
Positive output 1in all models.
Output voltage adjust.
Weight
95 gr (3.35 oz)
PKA 2432 PIL 112 gr (3.95 oz)
Case
Blue anodized self-cooled aluminium chassis
with snap-on cover and with tin plated brass
pins.
Thermal data
Thermal resistance case to ambient
PI-version R
th case-amb.
= 5.0 °C/W
PIL-version R
th case-amb.
= 4.6 °C/W
For Off-Card versions (CI) the specification
is valid if mounting surface has R
th
< 7 °C/W
to ambient.
3
7
8
9
10
EN/LZT 146 09 R1A © Ericsson Microelectronics AB, June 2000
Electrical Data
Fundamental circuit diagrams
Single output
5
4
1
9
8
10
3
Dual output
5
4
1
9
8
10
3
Triple output
5
4
7
6
9
8
1
10
3
4
EN/LZT 146 09 R1A © Ericsson Microelectronics AB, June 2000
PKA 2211 PI, CI
T
C
= 0…+95°C, V
I
= 19...35V unless otherwise specified.
Output
Output 1
Characteristics
Conditions
min
V
Oi
Output voltage initial
setting and accuracy
Output adjust range
1)
Output voltage
tolerance band
Idling voltage
Line regulation
Load regulation
t
tr
Load transient
recovery time
Long term drift
included
I
O
= 25 mA
I
O
= I
O max
I
O
= 0.1 …1.0
´
I
O max
, V
I
= 26 V
I
O
= 0.1 …1.0
´
I
O max
, V
I
= 26 V
load step = 0.8 × I
Omax
di
<0.1A/ms
dt
I
O
=I
O max
, T
C
<T
C max
I
O
=
0.1…1.0
´
I
O max
0.1 …0.9
´
V
O
From V
I
connection
to V
O
= 0.9
´
V
Oi
0
25
T
C
< T
C max
5.1
100
+250
–250
±0.5
10
30
5.0
I
O
= 0.1 …1.0
´
I
O max
5.10
T
C
= +25°C, I
O
= I
O max
, V
I
= 26 V
±10
%
typ
5.13
max
5.17
V
Unit
5.00
5.36
5.40
72
62
V
V
mV
mV
m
s
V
O
mV
mV
mV/°C
ms
ms
A
W
A
A
V
tr
Load transient voltage
T
coeff
t
r
t
s
I
O
P
O max
I
lim
I
sc
V
O ac
SVR
Temperature coefficient
2)
Ramp-up time
Start-up time
Output current
Max output power
3)
Current limiting
threshold
Short circuit current
1)
Output ripple & noise
Supply voltage
rejection (ac)
I
O
=I
O max
20 Hz …5 MHz
50
90
mV
p-p
dB
f = 100 Hz sine wave, 1 V
p-p
, V
I
= 26 V
(SVR = 20 log (1 V
p-p
/V
O p-p
))
1)
See Operating Information.
Temperature coefficient is positive at low temperatures.
3)
See Typical Characteristics, Power derating.
2)
Miscellaneous
Characteristics
h
P
d
Efficiency
Power dissipation
Conditions
I
O
= I
O max
, V
I
=26 V
I
O
= I
O max
, V
I
=26 V
min
78
typ
80
6.25
max
Unit
%
W
EN/LZT 146 09 R1A © Ericsson Microelectronics AB, June 2000
5
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