DC/DC power modules
5 V/ 2 A /10W
SMD and through-hole versions
with ultra low component height
8.0 mm (0.315 in.)
83% efficiency
1,500 Vdc isolation voltage
Switching frequency syncronization
MTTF >10 million hours at +50C
case temperature
Low EMI
PKF 4111A I
E
The MacroDensTM 10W PKF 4111A I true
component level on-board DC/DC power modules are
intended as distributed power sources in decentralized
48 and 60VDC power systems. They are optimized
for an operational ambient temperature range in
compliance with present and future application needs,
including non temperature controlled environments.
The mechanical design offers the choice of surface
mount or through-hole versions, delivered in ready-
to-use tubes, trays or tape & reel package, and
compatibility with semi and fully aqueous cleaning
processes.
For mechanical and other information please refer to the
PKF series General information data sheet.
2
EN/LZT 146 87 R1A Ericsson Microelectronics AB, December 2001
Notes:
1)
The input voltage range 38...72Vdc meets
the European Telecom Standard prETS
300 132-2 Nominal input voltage range in
48V and 60 Vdc power systems,
40.5...57.0V and 50.0...72.0V respec-
tively. Absolute max continuous input
voltage is 75 Vdc.
2)
The power modules will operate down to
36V, when V
I
decreases, but will turn on at
V
I
38V, when V
I
increases (see also
Operating information).
Input T
C
<T
Cmax
unless otherwise specified
mW
mW
Input stand-by power
P
RC
V
I
Input voltage range
1)2)
38
72
V
V
Ioff
Turn-off input voltage
30.0
36.0
V
34.5
See typical characteristics
V
Ion
Turn-on input voltage
38.0
V
36.0
See typical characteristics
C
I
Input capacitance
mF
1.4
P
Ii
Input idling power
I
O
= 0, T
C
= 30...+ 95 C
(V
I
= 53V)
(V
I
= 66V)
400
400
(V
I
= 53V)
(V
I
= 66V)
30
45
T
C
= 30...+ 95 C,
RC connected to pin 17
Characteristics
Conditions
min
typ
max
Unit
32.0
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.
Absolute Maximum Ratings
Characteristics
Isolation voltage
(input to output test voltage)
V
ISO
min
max
Unit
T
C
Case temperature at full output power
45
+100
C
T
S
Storage temperature
55
+125
C
V
I
Continuous input voltage
1)
0.5
+75
V dc
1,500
V dc
E
tr
Transient input energy
0.01
Ws
V
RC
Remote control voltage pin 11 ref. to pin 17
5
+16
V dc
V
adj
Output adjust voltage pin 8 ref. to pin 17
5
+40
V dc
Connections
18 17 16 15 14 13 12 11 10
1
2
3
4
5
6
7
8
9
Pin
Designation
Function
1
Out 1
Output 1(+).
2
Rtn
Output return.
3-6
N C
Not connected. Galvanically Isolated from input pins.
7
Sync
Synchronization input
8
V
adj
Output voltage adjust.
9
NOR
Connection of Nominal Output voltage Resistor.
10
TOA
Turn-on/off input voltage adjust.
11
RC
Remote control and turn-on/off input voltage adjust.
1216
N C
Not connected. Galvanically isolated from input pins.
17
In
Negative input.
18
+In
Positive Input.
3
EN/LZT 146 87 R1A Ericsson Microelectronics AB, December 2001
Safety
The PKF 4111A I series DC/DC power modules are designed in
accordance with EN 60 950, Safety of information technology equipment
including electrical business equipment. The PKF power modules are
recognized by UL and meet the applicable requirements in UL
1950 Safety of information technology equipment, the applicable Canadi-
an safety requirements and UL 1012 Standard for power supplies.
The DC/DC power module shall be installed in an end-use equip-
ment and considerations should be given to measuring the case
temperature to comply with T
Cmax
when in operation. Abnormal
component tests are conducted with the input protected by an
external 15 A fuse. The need for repeating these tests in the
end-use appliance shall be considered if installed in a circuit hav-
ing higher rated devices.
When the supply to the DC/DC power module meets all the re-
quirements for SELV (<60 V dc), the output is considered to re-
main within SELV limits (level 3). The isolation is an operational
insulation in accordance with EN 60 950.
The DC/DC power module is intended to be supplied by isolated
secondary circuitry and shall be installed in compliance with the
requirements of the ultimate application. If they are connected to a
60 V DC system reinforced insulation must be provided in the
power supply that isolates the input from the mains. Single fault
testing in the power supply must be performed in combination
with the DC/DC power module to 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. The terminal pins are only intended for connection to
mating connectors of internal wiring inside the end-use
equipment. 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).
The galvanic isolation is verified in an electric strength test. Test
voltage (V
ISO
) between input and output is 1,500 V dc for 60 s. In
production the test duration may be decreased to 1 s. The capacitor
between input and output has a value of 1 nF and the leakage
current is less than 1A @ 53 V dc. The case is designed in non-
conductive epoxy. Its flammability rating meets UL 94V-0. The
oxygen index is 34%
.
Fundamental circuit diagram
Single output
Electrical Data
Transient input voltage
Single voltage pulse at +25 C ambient temperature.
4
EN/LZT 146 87 R1A Ericsson Microelectronics AB, December 2001
T
C
= 30...+95C, V
I
= 38 ...72V and pin 8 connected to pin 9.
Output
2.8
Characteristics
Conditions
Unit
min
typ
max
P
d
Power dissipation
Miscellaneous
%
Efficiency
h
I
O
= 2 A
78
83
V
I
= 53 V
V
I
= 66 V
V
I
= 53 V
V
I
= 66 V
78
81
2.8
W
0
2.0
A
Characteristics
Conditions
Output 1
min
typ
max
Unit
Output voltage initial
setting and accuracy
V
Oi
Output voltage
tolerance band
V
O
Idling voltage
I
O
= 0 A
Load regulation
I
O
= 0.2...2.0 A, V
I
= 53 V
t
tr
Load transient voltage
V
tr
Temperature coefficient
2)
T
coeff
t
r
Start-up time
t
s
I
O
Max output power
2)
P
Omax
Current limiting
threshold
I
lim
T
C
<T
Cmax
, V
O
= 4.0 V
Short circuit current
I
sc
V
O
= 0.2...0.5 V, T
C
=+25C
20 Hz...5 MHz
Line regulation
I
O
= 2 A
Load transient
recovery time
5.02
5.05
5.08
V
5.8
6.0
V
20
50
80
180
mV
+150
mV
250
mV
1.3
mV/C
2
ms
5
ms
10
W
2.15
2.60
A
3.0
A
20
50
mV
p-p
80
dB
mV
150
ms
0.6 ...50 MHz
4.85
5.25
V
Long term drift
included
I
O
= 0.2...2.0 A
V
I
= 38...60 V
Output adjust range
1)
2.62
6.39
V
I
O
= 0.2...2.0 A, V
I
= 53 V
load step = 1 A
50
dB
1)
See also Operating Information.
2)
See Typical Characteristics.
T
C
= +25C, I
O
= 1.5 A, V
I
= 53 V
Ramp-up time
Output current
I
O
= 2 A
Output ripple & noise
V
Oac
f = 100 Hz sine wave, 1V
p-p
, V
I
= 53 V
(SVR = 20 log (1 V
p-p
/V
Op-p
))
I
O
= 0.2...2.0 A
,
V
I
= 53 V
From V
I
connection to V
O
= 0.9 V
Oi
I
O
=
0.2...2.0A, 0.1...0.9V
O,
V
I =
53V
I
O
= 2 A, T
C
=+40...+90C
SVR
Supply voltage rejection (ac)
V
I
= 50...72 V
6
mV
Calculated value
5
EN/LZT 146 87 R1A Ericsson Microelectronics AB, December 2001
-30
+30
+90
32
33
34
35
36
37
38
Turn-on
Turn-off
Turn-on/Tur-off voltage
Case temperature (C)
Output characteristic (typ)
Power derating
Temperature coefficient
Turn-on/turn-off input voltage
Efficiency (typ)
@ T
A
= +25C
0.1 ms/div
2 A/div
200 mV/div
The output voltage
deviation is deter-
mined by the load
transient (dI/dt)
Load change:
dI/dt
4 A/ms
Dynamic load response (typ) @ + 25 C
EMC Specifications
During EMC measurements the PKF module is measured directly.
The fundamental switching frequency is 510 kHz 5% @
I
O
= (0.1...1.0) I
Omax
.
Conducted EMI (input teminals)
Output voltage (V)
Case temperature (C)
PKF 4111A without filter.
Typical Characteristics
External Filter (class B)
Required external input filter in order to meet class B in EN
55022, CISPR 22 and FCC part 15J.
+
-
Supply
voltage
L1
C2
C3
C6
C5
C4
C1
L2
pin 18
pin 17
L1 = 51H ( Recommended part: Siemens B82790-S0513 )
L2 = 10H
C1, C2, C3 = 0.68 F
C4 = 22F
C5, C6 = 10nF
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