PKA 2000 I
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
2540 W DC/DC Power Modules
24 V Input Series
E
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.
EN/LZT 146 09 R1A Ericsson Microelectronics AB, June 2000
2
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.
Environmental Characteristics
Characteristics
Frequency
10500 Hz
Amplitude
0.75 mm
Acceleration
10 g
Number of cycles
10 in each axis
Vibration
(Sinusoidal)
IEC 68-2-6 F
c
Test procedure & conditions
Peak acceleration
200 g
Shock duration
3 ms
Shock
(Half sinus)
IEC 68-2-27 E
a
Temperature
40C to +125C
Number of cycles
10
Temperature
change
IEC 68-2-14 N
a
Damp heat
IEC 68-2-3 C
a
Temperature
40C
Duration
56 days
Bump
(Half sinus)
IEC 68-2-29 E
b
Peak acceleration
40 g
Bump duration
6 ms
Number of bumps
1000 in 6 directions
Accelerated
damp heat
IEC 68-2-3 C
a
with bias
Temperature
85C
Humidity
85% RH
Duration
500 hours
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.
General
1)
Corresponding ambient temp. range (T
A
) at full output power is 45 to +85 C.
Input T
C
< T
C max
Characteristics
Conditions
min
typ
max
Unit
T
C
< T
C max
19
32
V
V
Ioff
Turn-off input voltage
(See Operating Information)
13
18
V
I
O
=0,T
C
= 0...+95C
0.8
W
Inrush current
2)
A
I
Irush
Input idling power
P
Ii
Input transient peak
current (transient
immunity)
P< 1 kW, V
C
< 50 V,
t
r
/t
d
=10/1000
ms
20
A
15
I
I 2t
510
-4
A
2s
I
O
= I
Onom
2)
PKA 2411 PIL = 30 A, 210
-3
A
2s
*)
PKA 2432 PIL = 30 A, 510
-3
A
2s
Absolute Maximum Ratings
Characteristics
min
max
Unit
T
C
Case temperature
1)
45
+115
C
T
S
Storage temperature
55
+125
C
V
I
Input voltage
0.5
36
V dc
Isolation voltage (input to output test voltage)
V dc
V
ISO
Transient input energy @ T
A
= +25 C
1.3
Ws
500
Remote control voltage (pin 9)
0
5
V
Output adjust voltage (pin 10)
0
V
O
V
V
RC
V
adj
19
35
V
T
C
< + 95 C
Input voltage range
V
I
EN/LZT 146 09 R1A Ericsson Microelectronics AB, June 2000
3
Mechanical Data
Dimensions in mm (in)
Case
Blue anodized self-cooled aluminium chassis
with snap-on cover and with tin plated brass
pins.
Weight
95 gr (3.35 oz)
PKA 2432 PIL 112 gr (3.95 oz)
Pin
Designation
Function
Connections
1
RC
Remote control. To turn-on and turn-off the output. It is also used to
adjust the turn-off input voltage threshold.
2
NC
Not connected.
3
In
Negative input.
4
+In
Positive input.
5
Aux
Auxiliary.
6
NC
Not connected in singles.
Out 2
Negative output 2 in duals.
Out 3
Negative output 3 in triples.
7
NC
Not connected in singles.
+Out 2
Positive output 2 in duals and triples.
8
Out 1/Rtn
Negative output 1 in singles and duals. Output return in triples.
9
+Out 1
Positive output 1in all models.
10
V
adj
Output voltage adjust.
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.
On-Card
Off-Card
EN/LZT 146 09 R1A Ericsson Microelectronics AB, June 2000
4
Fundamental circuit diagrams
Electrical Data
Single output
9
8
10
5
4
1
3
Dual output
Triple output
6
9
8
5
4
3
7
10
1
9
8
10
5
4
1
3
EN/LZT 146 09 R1A Ericsson Microelectronics AB, June 2000
5
PKA 2211 PI, CI
Characteristics
Conditions
Output 1
min
typ
max
Unit
Output voltage initial
setting and accuracy
T
C
= +25 C, I
O
= I
Omax
, V
I
= 26 V
V
Oi
Output voltage
tolerance band
V
O
Idling voltage
I
O
= 25 mA
Line regulation
I
O
= I
O max
5.10
5.13
5.17
V
5.40
V
T
C
= 0...+95C, V
I
= 19...35V unless otherwise specified.
Long term drift
included
Output
I
O
= 0.1 ...1.0
I
O max
72
mV
Output adjust range
1)
10
%
5.00
5.36
V
Characteristics
Conditions
Unit
min
typ
max
Efficiency
h
Power dissipation
P
d
Miscellaneous
78
80
%
6.25
W
I
O
= I
O max
, V
I
=26 V
I
O
= I
Omax
, V
I
=26 V
0
5.0
A
Load regulation
I
O
= 0.1 ...1.0
I
O max
, V
I
= 26 V
t
tr
Load transient voltage
V
tr
Temperature coefficient
2)
T
coeff
Ramp-up time
t
r
Start-up time
t
s
0.1 ...0.9
V
O
From V
I
connection
to V
O
= 0.9
V
Oi
Output current
I
O
Max output power
3)
P
O max
Current limiting
threshold
I
lim
T
C
< T
C max
Short circuit current
1)
I
sc
Output ripple & noise
20 Hz ...5 MHz
Supply voltage
rejection (ac)
SVR
f = 100 Hz sine wave, 1 V
p-p
, V
I
= 26 V
(SVR = 20 log (1 V
p-p
/V
O p-p
))
Load transient
recovery time
62
mV
+250
mV
250
mV
I
O
=I
O max
, T
C
<T
C max
0.5
mV/C
10
ms
30
ms
25
W
5.1
A
A
90
mV
p-p
V
O ac
50
dB
100
m
s
I
O
=I
O max
I
O
=
0.1...1.0
I
O max
1)
See Operating Information.
2)
Temperature coefficient is positive at low temperatures.
3)
See Typical Characteristics, Power derating.
I
O
= 0.1 ...1.0
I
O max
, V
I
= 26 V
load step = 0.8 I
Omax
di
dt
<0.1A/
ms
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