Ericsson Internal
PRODUCT SPECIFICATION 1 (4)
Prepared (also subject responsible if other) No.
EFEIDEN 1/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2008-7-21 G
Key Features
• Industry standard Quarter-brick
57.9 x 36.8 x 11.6 mm (2.28 x 1.45 x 0.46 in.)
• High efficiency, typ. 96 % at 12 Vout 50% load & 48Vin
• 1500 Vdc input to output isolation
• Meets safety requirements according to IEC/EN/UL
60950
• More than 1.1 million hours MTBF
General Characteristics
• N+1 parallelable
• Input under voltage protection
• Over temperature protection
• Output over voltage protection
• Output short-circuit protection
• Remote control
• Optional latching OTP, OVP
• Optional baseplate
• Optional case to ground pin (only with baseplate)
• Highly automated manufacturing ensures quality
• ISO 9001/14001 certified supplier
Safety Approvals Design for Environment
Meets requirements in high-
temperature lead-free soldering
processes.
Limited Internal
TABLE OF CONTENTS 1 (1)
Prepared (also subject responsible if other) No.
MPM/BY/M Maria Rosendahl 001 52-EN/LZT 146 305 Uen
Contents
General Information ............................................................. 2
Safety Specification ............................................................. 3
Absolute Maximum Ratings ............................................................. 4
Product Program Ordering No.
12.0 V/25 A Electrical Specification PKM 4204B PI ...................................... 5
12.0 V/33 A Electrical Specification PKM 4304B PI ...................................... 9
EMC Specification ........................................................... 13
Operating Information ........................................................... 14
Thermal considerations ........................................................... 16
Connections ........................................................... 17
Mechanical Information ........................................................... 18
Soldering Information ........................................................... 20
Delivery Information ........................................................... 20
Product Qualification Specification ........................................................... 21
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
Ericsson Internal
PRODUCT SPECIFICATION 2 (4)
Prepared (also subject responsible if other) No.
EFEIDEN 1/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2008-7-21 G
General Information
Ordering Information
See Contents for individual product ordering numbers.
Option Suffix Ordering No.
Positive Remote Control Logic
Lead length 3.69 mm (0.145 in)
Lead length 4.57 mm (0.180 in)
Lead length 2.79 mm (0.110 in)
Baseplate
Case to ground pin (¹)
Latching protections (OTP,OVP)
P
LA
LB
LC
HS
G
LP
PKM 4304B PIP
PKM 4304B PILA
PKM 4304B PILB
PKM 4304B PILC
PKM 4304B PIHS
PKM 4304B PIHSG
PKM 4304B PILP
Note: (1) Case to ground pin only available with baseplate
Note: (2) If several options needed below sequence is to be used
LOGIC OPTION Æ BASEPLATE Æ CASE GROUND Æ LATCHING PROT. Æ
PIN LENGTH, example: PKM4304BPIPHSGLPLA
Reliability
The Mean Time Between Failure (MTBF) is calculated at full
output power and an operating ambient temperature (TA) of
+40°C. Different methods could be used to calculate the
predicted MTBF and failure rate which may give different
results. Ericsson Power Modules currently uses two
different methods, Ericsson failure rate data system
DependTool and Telcordia SR332.
Predicted MTBF for the series is:
- 1.1 million hours according to Telcordia SR332,
issue 1, Black box technique.
The Ericsson failure rate data system is based on field
tracking data. The data corresponds to actual failure rates
of components used in Information Technology and
Telecom (IT&T) equipment in temperature controlled
environments
(TA = -5...+65°C). Telcordia SR332 is a commonly used
standard method intended for reliability calculations in IT&T
equipment. The parts count procedure used in this method
was originally modelled on the methods from
MIL-HDBK-217F, Reliability Predictions of Electronic
Equipment.
It assumes that no reliability data is available on the actual
units and devices for which the predictions are to be made,
i.e. all predictions are based on generic reliability
parameters.
Compatibility with RoHS requirements
The products are compatible with the relevant clauses and
requirements of the RoHS directive 2002/95/EC and have a
maximum concentration value of 0.1% by weight in
homogeneous materials for lead, mercury, hexavalent
chromium, PBB and PBDE and of 0.01% by weight in
homogeneous materials for cadmium.
Exemptions in the RoHS directive utilized in Ericsson
Power Modules products include:
- Lead in high melting temperature type solder (used to
solder the die in semiconductor packages)
- Lead in glass of electronics components and in
electronic ceramic parts (e.g. fill material in chip
resistors)
- Lead as an alloying element in copper alloy containing
up to 4% lead by weight (used in connection pins
made of Brass)
Quality Statement
The products are designed and manufactured in an
industrial environment where quality systems and methods
like ISO 9000, 6σ (sigma), and SPC are intensively in use to
boost the continuous improvements strategy. Infant
mortality or early failures in the products are screened out
and they are subjected to an ATE-based final test.
Conservative design rules, design reviews and product
qualifications, plus the high competence of an engaged
work force, contribute to the high quality of our products.
Warranty
Warranty period and conditions are defined in
Ericsson Power Modules General Terms and Conditions of
Sale.
Limitation of Liability
Ericsson power Modules does not make any other
warranties, expressed or implied including any warranty of
merchantability or fitness for a particular purpose
(including, but not limited to, use in life support
applications, where malfunctions of product can cause
injury to a person’s health or life).
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
2
Ericsson Internal
PRODUCT SPECIFICATION 3 (4)
Prepared (also subject responsible if other) No.
EFEIDEN 1/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) 2008-7-21 G
Safety Specification
General information
Ericsson Power Modules DC/DC converters and DC/DC
regulators are designed in accordance with safety
standards IEC/EN/UL60950, Safety of Information
Technology Equipment.
IEC/EN/UL60950 contains requirements to prevent injury
or damage due to the following hazards:
• Electrical shock
• Energy hazards
• Fire
• Mechanical and heat hazards
• Radiation hazards
• Chemical hazards
On-board DC-DC converters are defined as component
power supplies. As components they cannot fully comply
with the provisions of any Safety requirements without
“Conditions of Acceptability”. It is the responsibility of the
installer to ensure that the final product housing these
components complies with the requirements of all
applicable Safety standards and Directives for the final
product.
Component power supplies for general use should comply
with the requirements in IEC60950, EN60950 and
UL60950 “Safety of information technology equipment”.
There are other more product related standards, e.g.
EC61204-7 “Safety standard for power supplies",
IEEE802.3af “Ethernet LAN/MAN Data terminal equipment
power”, and ETS300132-2 “Power supply interface at the
input to telecommunications equipment; part 2: DC”, but
all of these standards are based on IEC/EN/UL60950 with
regards to safety. PKM-B has the following stand-off (see
mechanical drawing for further information):
- 0.7 mm stand-off to tallest insulated part (signal
transformer's plastic housing)
- 0.7 mm stand-off to tallest unconnected (floating)
conductive part (the integrated transformer's and output
inductor's ferrite cores)
- 0.95 mm stand-off to tallest connected conductive part
(input- and output capacitors)
Ericsson Power Modules DC/DC converters and DC/DC
regulators are UL60950 recognized and certified in
accordance with EN60950.
The flammability rating for all construction parts of the
products meets requirements for V-0 class material
according to IEC 60695-11-10.
The products should be installed in the end-use
equipment, in accordance with the requirements of the
ultimate application. Normally the output of the DC/DC
converter is considered as SELV (Safety Extra Low
Voltage) and the input source must be isolated by
minimum Double or Reinforced Insulation from the primary
circuit (AC mains) in accordance with IEC/EN/UL60950.
Isolated DC/DC converters
It is recommended that a slow blow fuse with a rating
twice the maximum input current per selected product be
used at the input of each DC/DC converter. If an input filter
is used in the circuit the fuse should be placed in front of
the input filter.
In the rare event of a component problem in the input filter
or in the DC/DC converter that imposes a short circuit on
the input source, this fuse will provide the following
functions:
• Isolate the faulty DC/DC converter from the input
power source so as not to affect the operation of
other parts of the system.
• Protect the distribution wiring from excessive
current and power loss thus preventing
hazardous overheating.
The galvanic isolation is verified in an electric strength test.
The test voltage (Viso) between input and output is
1500 Vdc or 2250 Vdc for 60 seconds (refer to product
specification).
Leakage current is less than 100 µA at nominal input
voltage.
24 V DC systems
The input voltage to the DC/DC converter is SELV (Safety
Extra Low Voltage) and the output remains SELV under
normal and abnormal operating conditions.
48 and 60 V DC systems
If the input voltage to Ericsson Power Modules DC/DC
converter is 75 Vdc or less, then the output remains SELV
(Safety Extra Low Voltage) under normal and abnormal
operating conditions.
Single fault testing in the input power supply circuit should
be performed with the DC/DC converter connected to
demonstrate that the input voltage does not exceed
75 Vdc.
If the input power source circuit is a DC power system, the
source may be treated as a TNV2 circuit and testing has
demonstrated compliance with SELV limits and isolation
requirements equivalent to Basic Insulation in accordance
with IEC/EN/UL60950.
Non-isolated DC/DC regulators
The input voltage to the DC/DC regulator is SELV (Safety
Extra Low Voltage) and the output remains SELV under
normal and abnormal operating conditions.
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
3
Ericsson Internal
PRODUCT SPECIFICATION 1 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
Absolute Maximum Ratings
Characteristics min typ max Unit
Open frame -40 +125
T
ref
Operating Temperature (see Thermal Consideration section) Base plate option -40 +95 °C
T
S
Storage temperature -55 +125 °C
V
I
Input voltage -0.5 +80 V
V
iso
Isolation voltage (input to output test voltage) 1500 Vdc
V
tr
Input voltage transient (t
p
100 ms) 100 V
Positive logic option -0.5 15
V
RC
Remote Control pin voltage
(see Operating Information section) Negative logic option -0.5 15 V
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.
Fundamental Circuit Diagram
RC Control
+IN
-OUT
+OUT
-IN
Driver
Isolated feed back
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
4
Ericsson Internal
PRODUCT SPECIFICATION 2 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
12 V/25 A Electrical Specification PKM 4204B PI
T
ref
= -40 to +90º C for open frame and -40 to +60ºC for base plate option, V
I
= 36 to 75 V, I
O
= 0 to 25 A unless otherwise
specified under Conditions.
Typical values given at: T
ref
= +25°C, V
I
= 53 V, max I
O
, unless otherwise specified under Conditions.
Characteristics
Conditions
Min
typ
max
Unit
V
I
Input voltage range 36 75 V
V
Ioff
Turn-off input voltage Decreasing input voltage 32 33 34 V
V
Ion
Turn-on input voltage Increasing input voltage 34 35.2 36 V
C
I
Internal input capacitance 17.6
µ
F
V
I
= 75 V 0 290 W
V
I
= 53 V 0 286 W
P
O
Output power
V
I
= 36 V 0 283 W
50 % of max I
O
96.2
max I
O
95.8
50 % of max I
O
, V
I
= 48 V 96.4
η Efficiency
max I
O
, V
I
= 48 V 95.9
%
P
d
Power Dissipation max I
O
12.4 W
P
li
Input idling power I
O
= 0 A, V
I
= 53 V 3 W
P
RC
Input standby power V
I
= 53 V (turned off with RC) 0.1 W
f
s
Switching frequency 100 125 150 kHz
V
Oi
Output voltage initial setting and
accuracy T
ref
= +25°C, V
I
= 53 V, I
O
= 0 A 11.85 11.9 11.95 V
Output voltage tolerance band 0 to 100 % of max I
O
11.0 12.5 V
Idling voltage I
O
= 0 A 11.5 12.5 V
Line regulation max I
O
, from min V
I
to max V
I
0.2 V
V
O
Load regulation V
I
= 53 V, from min I
O
to max I
O
0.4 V
V
tr
Load transient
voltage deviation ±0.8 V
t
tr
Load transient recovery time
V
I
= 53 V, Load step 25-75-25 % of
max I
O
, di/dt = 5 A/
µ
s
see Note 1 0.1 ms
t
r
Ramp-up time
(from 10−90 % of V
Oi
)
3 7 15 ms
t
s
Start-up time
(from V
I
connection to 90 % of V
Oi
)
max I
O
4 12 25 ms
max I
O
0.1
m
s
t
f
V
I
shut-down fall time
(from V
I
off to 10 % of V
O
)
I
O
= 0 A 2.4 s
RC start-up time max I
O
10 ms
max I
O
6 ms
t
RC
RC shut-down fall time
(from RC
off to 10 % of V
O
)
I
O
= 0 A 2.4 s
I
O
Output current 0 25 A
I
lim
Current limit threshold T
ref
< max T
ref
36 A
I
sc
Short circuit current T
ref
= 25ºC, see Note 2 42 A
V
Oac
Output ripple & noise See ripple & noise section, max I
O
200 mVp-p
Input over voltage protection 83
OVP Output over voltage protection 13.5 V
Note 1: Output filter 2 x 220 µF, 100 mΩ, tantalum + 33 µF, ceramic
Note 2: See Operating Information section
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
5
Ericsson Internal
PRODUCT SPECIFICATION 3 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
12 V/25 A Typical Characteristics
PKM 4204B PI
Efficiency Power Dissipation
80
85
90
95
100
0 5 10 15 20 25 [A]
[%]
36 V
48 V
53 V
75 V
0
5
10
15
0 5 10 15 2 0 2 5 [ A ]
[W]
36 V
48 V
53 V
75 V
Efficiency vs. load current and input voltage at T
ref
= +25°C Dissipated power vs. load current and input voltage at
T
ref
= +25°C
Output Characteristics
Current Limit Characteristics
11.0
11.2
11.4
11.6
11.8
12.0
0 5 10 15 20 25 [A]
[V]
36 V
48 V
53 V
75 V
38v
0
3
6
9
12
010203040[A]
[V]
36 V
48 V
53 V
75 V
O
utput voltage vs. load current at T
ref
= +25°C
O
utput voltage vs. load current at I
O
> max I
O
, T
ref
= +25°C
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
6
Ericsson Internal
PRODUCT SPECIFICATION 4 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
12 V/25 A Typical Characteristics
PKM 4204B PI
Output Current Derating, open frame Thermal Resistance, open frame
0
5
10
15
20
25
0 20 40 60 80 100 [°C]
[A]
3.0 m/s
2.5 m/s
2.0 m/s
1.5 m/s
1.0 m/s
0.5 m/s
Nat. Conv.
0
2
4
6
8
10
0.0 0.5 1.0 1.5 2.0 2.5 3.0[m/s]
[°C/W]
Available load current vs. ambient air temperature and airflow at
V
I
= 53 V. See Thermal Consideration section.
Thermal resistance vs. airspeed measured at the converter.
Tested in wind tunnel with airflow and test conditions as per
the Thermal consideration section.
Output Current Derating, base plate option Thermal Resistance, base plate option
0
5
10
15
20
25
0 20 40 60 80 100 [°C]
[A]
3.0 m/s
2.5 m/s
2.0 m/s
1.5 m/s
1.0 m/s
Nat. Conv.
0
2
4
6
8
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
[m/s]
[°C/W]
Available load current vs. ambient air temperature and airflow at
V
I
= 53 V. See Thermal Consideration section.
Thermal resistance vs. airspeed measured at the converter.
Tested in wind tunnel with airflow and test conditions as per
the Thermal consideration section.
Output Current Derating, base plate option with heat sink* Thermal Resistance, base plate option with heat sink*
0
5
10
15
20
25
0 20 40 60 80 100 [°C]
[A]
3.0 m/s
2.5 m/s
2.0 m/s
1.5 m/s
1.0 m/s
Nat. Conv.
0
2
4
6
8
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
[m/s]
[°C/W]
Available load current vs. ambient air temperature and airflow at
V
I
= 53 V. See Thermal Consideration section.
Thermal resistance vs. airspeed measured at the converter.
Tested in wind tunnel with airflow and test conditions as per
the Thermal consideration section.
*
)
Heat sink: finned aluminium, height: 0.23”; Thermal pad: thermal conductivity: 6W/mK, thickness: 0.25mm; Mounting: two M3 screws, torque: 0.44Nm
NOTE: the product is not mechanically tested with heat sink
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
7
Ericsson Internal
PRODUCT SPECIFICATION 5 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
Place your
graph here
Place your
graph here
12 V/25 A Typical Characteristics PKM 4204B PI
Start-up Shut-down
Start-up enabled by connecting V
I
at:
T
ref
= +25°C, I
O
= 25 A resistive load,
V
I
= 53V.
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: 5 ms/div.
Shut-down enabled by disconnecting V
I
at: T
ref
= +25°C, I
O
= 25 A resistive load,
V
I
= 53 V.
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: 5 ms/div.
Output Ripple & Noise Output Load Transient Response
Output voltage ripple at:
T
ref
= +25°C, V
I
= 53 V,
I
O
= 25 A resistive load.
Trace: output voltage (100 mV/div.).
Time scale: 2 µs/div.
Output voltage response to load
current step-change (6.25-18.75-6.25 A)
at: T
ref
=+25°C, V
I
= 53 V.
Top trace: output voltage (1 V/div.).
Bottom trace: load current (20 A/div.).
Time scale: 0.1 ms/div.
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
8
Ericsson Internal
PRODUCT SPECIFICATION 6 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
12 V/33 A Electrical Specification PKM 4304B PI
T
ref
= -40 to +90ºC for open frame and -40 to +60ºC for base plate option, V
I
= 36 to 75 V, I
O
= 0 to 33 A unless otherwise
specified under Conditions.
Typical values given at: T
ref
= +25°C, V
I
= 53 V, max I
O
, unless otherwise specified under Conditions.
Characteristics
Conditions
min
typ
max
Unit
V
I
Input voltage range 36 75 V
V
Ioff
Turn-off input voltage Decreasing input voltage 32 33 34 V
V
Ion
Turn-on input voltage Increasing input voltage 34 35.2 36 V
C
I
Internal input capacitance 17.6
µ
F
V
I
= 75 V 0 380 W
V
I
= 53 V 0 377 W
P
O
Output power
V
I
= 36 V 0 371 W
50 % of max I
O
96.3
max I
O
95.2
50 % of max I
O
, V
I
= 48 V 96.4
η Efficiency
max I
O
, V
I
= 48 V 95.3
%
P
d
Power Dissipation max I
O
18 34 W
P
li
Input idling power I
O
= 0 A, V
I
= 53 V 4 W
P
RC
Input standby power V
I
= 53 V (turned off with RC) 0.1 W
f
s
Switching frequency 100 125 150 kHz
V
Oi
Output voltage initial setting and
accuracy T
ref
= +25°C, V
I
= 53 V, I
O
= 0 A 11.85 11.9 11.95 V
Output voltage tolerance band 0 to 100 % of max I
O
10.8 12.5 V
Idling voltage I
O
= 0 A 11.5 12.5 V
Line regulation max I
O
, from min V
I
to max V
I
0.2 0.6 V
V
O
Load regulation V
I
= 53 V, from min I
O
to max I
O
0.5 0.9 V
V
tr
Load transient
voltage deviation ±1 V
t
tr
Load transient recovery time
V
I
= 53 V, Load step 25-75-25 % of
max I
O
, di/dt = 5 A/
µ
s
see Note 1 0.1 ms
t
r
Ramp-up time
(from 10−90 % of V
Oi
)
3 7 15 ms
t
s
Start-up time
(from V
I
connection to 90 % of V
Oi
)
max I
O
4 12 25 ms
max I
O
0.1
m
s
t
f
V
I
shut-down fall time
(from V
I
off to 10 % of V
O
)
I
O
= 0 A 2.4 s
RC start-up time max I
O
10 ms
max I
O
6 ms
t
RC
RC shut-down fall time
(from RC
off to 10 % of V
O
)
I
O
= 0 A 2.4 s
I
O
Output current 0 33 A
I
lim
Current limit threshold T
ref
< max T
ref
41 A
I
sc
Short circuit current T
ref
= 25ºC, see Note 2 47 A
V
Oac
Output ripple & noise See ripple & noise section, max I
O
200 mVp-p
Input over voltage protection 83
OVP Output over voltage protection 13.5 V
Note 1: Output filter 2 x 220 µF, 100 mΩ, tantalum + 33 µF, ceramic
Note 2: See Operating Information section
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
9
Ericsson Internal
PRODUCT SPECIFICATION 7 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
12 V/33 A Typical Characteristics
PKM 4304B PI
Efficiency Power Dissipation
80
85
90
95
100
0 5 10 15 20 25 30 [A]
[%]
36 V
48 V
53 V
75 V
0
5
10
15
20
25
0 5 10 15 20 25 30 [A]
[W]
36 V
48 V
53 V
75 V
Efficiency vs. load current and input voltage at T
ref
= +25°C Dissipated power vs. load current and input voltage at
T
ref
= +25°C
Output Characteristics
Current Limit Characteristics
11.0
11.2
11.4
11.6
11.8
12.0
0 5 10 15 20 25 30 [A]
[V]
36 V
48 V
53 V
75 V
38v
0
3
6
9
12
0 10 20304050[A]
[V]
36 V
48 V
53 V
75 V
O
utput voltage vs. load current at T
ref
= +25°C
O
utput voltage vs. load current at I
O
> max I
O
, T
ref
= +25°C
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
10
Ericsson Internal
PRODUCT SPECIFICATION 8 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
12 V/33 A Typical Characteristics
PKM 4304B PI
Output Current Derating, open frame Thermal Resistance, open frame
0
5
10
15
20
25
30
0 20406080100[°C]
[A]
3.0 m/s
2.5 m/s
2.0 m/s
1.5 m/s
1.0 m/s
Nat. Conv.
0
2
4
6
8
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
[
m/s
]
[°C/W]
Available load current vs. ambient air temperature and airflow at
V
I
= 53 V. See Thermal Consideration section.
Thermal resistance vs. airspeed measured at the converter.
Tested in wind tunnel with airflow and test conditions as per
the Thermal consideration section.
Output Current Derating, base plate option Thermal Resistance, base plate option
0
5
10
15
20
25
30
0 20 40 60 80 100 [°C]
[A]
3.0 m/s
2.5 m/s
2.0 m/s
1.5 m/s
1.0 m/s
Nat. Conv.
0
2
4
6
8
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
[
m/s
]
[°C/W]
Available load current vs. ambient air temperature and airflow at
V
I
= 53 V. See Thermal Consideration section.
Thermal resistance vs. airspeed measured at the converter.
Tested in wind tunnel with airflow and test conditions as per
the Thermal consideration section.
Output Current Derating, base plate option with heat sink* Thermal Resistance, base plate option with heat sink*
0
5
10
15
20
25
30
0 20406080100[°C]
[A]
3.0 m/s
2.5 m/s
2.0 m/s
1.5 m/s
1.0 m/s
Nat. Conv.
0
2
4
6
8
10
0.0
0.5
1.0
1.5
2.0
2.5
3.0
[
m/s
]
[°C/W]
Available load current vs. ambient air temperature and airflow at
V
I
= 53 V. See Thermal Consideration section.
Thermal resistance vs. airspeed measured at the converter.
Tested in wind tunnel with airflow and test conditions as per
the Thermal consideration section.
*
)
Heat sink: finned aluminium, height: 0.23”; Thermal pad: thermal conductivity: 6W/mK, thickness: 0.25mm; Mounting: two M3 screws, torque: 0.44Nm
NOTE: the product is not mechanically tested with heat sink
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
11
Ericsson Internal
PRODUCT SPECIFICATION 9 (10)
Prepared (also subject responsible if other) No.
ECHWANG 2/1301-BMR 653 Uen
Approved Checked Date Rev Reference
SEC/D (Julia You) EXUEFYA 2008-7-21 D
Place your
graph here
Place your
graph here
Place your
graph here
Place your
graph here
12 V/33 A Typical Characteristics PKM 4304B PI
Start-up Shut-down
Start-up enabled by connecting V
I
at:
T
ref
= +25°C, I
O
= 33 A resistive load,
V
I
= 53V.
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: 5 ms/div.
Shut-down enabled by disconnecting V
I
at: T
ref
= +25°C, I
O
= 33 A resistive load,
V
I
= 53 V.
Top trace: output voltage (5 V/div.).
Bottom trace: input voltage (20 V/div.).
Time scale: 5 ms/div.
Output Ripple & Noise Output Load Transient Response
Output voltage ripple at:
T
ref
= +25°C, V
I
= 53 V,
I
O
= 33 A resistive load.
Trace: output voltage (100mV/div.).
Time scale: 2 µs/div.
Output voltage response to load
current step-change (8.25-24.75-8.25 A)
at: T
ref
=+25°C, V
I
= 53 V.
Top trace: output voltage (1 V/div.).
Bottom trace: load current (20 A/div.).
Time scale: 0.1 ms/div.
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
12
Ericsson Internal
PRODUCT SPECIFICATION 1 (6)
Prepared (also subject responsible if other) No.
ECHWANG 3/1301-BMR 653 Uen
Approved Checked Date Rev Reference
EXUEFYA 2008-06-30 H
EMC Specification
Conducted EMI measured according to EN55022, CISPR 22
and FCC part 15J (see test set-up). See Design note 009 for
detailed information.
The fundamental switching frequency is 125 kHz for
PKM 4304B PI @ V
I
= 53 V, max I
O
.
Conducted EMI Input terminal value (typ)
EMI without filter
External filter (class B)
Required external input filter in order to meet class B in
EN 55022, CISPR 22 and FCC part 15J.
L1
C1 C2 C3
C4
C5
R
-
+
Module
+
-
0
0
L2
Filter components:
C1 = 1 + 1 µF
C2 = 1 + 1 µF
C3 = 1 + 1 + 33 µF
C4 = 2.2 nF
C5 = 2.2 nF
L1 = 0.809 mH
L2 = 0.809 mH
EMI with filter
Test set-up
Layout recommendation
The radiated EMI performance of the DC/DC converter will
depend on the PCB layout and ground layer design.
It is also important to consider the stand-off of the DC/DC
converter.
If a ground layer is used, it should be connected to the output
of the DC/DC converter and the equipment ground or
chassis.
A ground layer will increase the stray capacitance in the PCB
and improve the high frequency EMC performance.
Output ripple and noise
Output ripple and noise measured according to figure below.
See Design Note 022 for detailed information.
10uF
0.1uF
-Vout
+Vout
*Conductor from Vout to capacitors = 50mm [1.97in.]
BNC
Connector
to Scope
Tantalum
Capacitor
Ceramic
Capacitor
+
Output ripple and noise test setup
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
13
Ericsson Internal
PRODUCT SPECIFICATION 2 (6)
Prepared (also subject responsible if other) No.
ECHWANG 3/1301-BMR 653 Uen
Approved Checked Date Rev Reference
EXUEFYA 2008-06-30 H
Operating information
Input Voltage
The input voltage range 36 to 75 Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for normal
input voltage range in —48 and —60 Vdc systems,
-40.5 to -57.0 V and —50.0 to -72 V respectively.
At input voltages exceeding 75 V, the power loss will be
higher than at normal input voltage and T
ref
must be limited to
absolute max 115°C. The absolute maximum continuous input
voltage is 80 Vdc.
Turn-off Input Voltage
The DC/DC converters monitor the input
voltage and will turn on and turn off at predetermined levels.
The minimum hysteresis between turn on and turn off input
voltage is 1 V.
Remote Control (RC)
The products are fitted with a
remote control function referenced
to the primary negative input
connection (- In), and positive logic
options available. The RC function
allows the DC/DC converter to be
turned on/off by an external device
like a semiconductor or mechanical
switch. The RC pin has an internal
pull up resistor to + In.
The maximum required sink current is 0.2 mA. When the RC
pin is left open, the voltage generated on the RC pin is
max 10 V. The second option is “positive logic” remote
control, which can be ordered by adding the suffix “P” to the
end of the part number. The DC/DC converter will turn on
when the RC pin is left open. Turn off is achieved by
connecting the RC pin to the - In. To ensure safe turn off the
voltage difference between RC pin and the - In pin shall be
less than 1V. The DC/DC converter will restart automatically
when this connection is opened.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the DC/DC converter. It is
important that the input source has low characteristic
impedance. The performance in some applications can be
enhanced by addition of external capacitance as described
under External Decoupling Capacitors. If the input voltage
source contains significant inductance, the addition of a
330 µF capacitor across the input of the DC/DC converter will
ensure stable operation.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the point of load can
be improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic
and electrolytic capacitors as close to the load as possible,
using several parallel capacitors to lower the effective ESR.
The ceramic capacitors will handle high-frequency dynamic
load changes while the electrolytic capacitors are used to
handle low frequency dynamic load changes. Ceramic
capacitors will also reduce any high frequency noise at the
load. It is equally important to use low resistance and low
inductance PCB layouts and cabling.For loosely regulated
DC/DC converters, such as PKM-B intermediate bus con-
verters, there is no limit on the value of output capacitance
that may be used. The user should be aware, however, that
large values of capacitance will affect the ramp-up time of the
DC/DC converter output voltage during start-up.
Parallel Operation
The PKM 4000B Series DC/DC converters can be connected
in parallel with a common input. Paralleling is accomplished
by connecting the output voltage pins and input pins directly.
No external components are necessary. Up to 90% of max
output current can be used from each module. Layout
considerations should be made to avoid unbalanced current
sharing. For more details on paralleling, please consult your
local Ericsson Power Modules representative.
Input Voltage 53V
11.2
11.4
11.6
11.8
12.0
0 102030405060
Output Current (A)
Output Voltage (V)
module 1
module 2
module 1 + 2
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
14
Ericsson Internal
PRODUCT SPECIFICATION 3 (6)
Prepared (also subject responsible if other) No.
ECHWANG 3/1301-BMR 653 Uen
Approved Checked Date Rev Reference
EXUEFYA 2008-06-30 H
Over Temperature Protection (OTP)
The DC/DC converters are protected from thermal overload
by an internal over temperature shutdown circuit.
When T
ref
as defined in thermal consideration section
exceeds 125°C the DC/DC converter will shut down. The
DC/DC converter will make continuous attempts to start up
(non latching mode) We provide an optional variant of the
product with a latching OTP. Add suffix “LP” to the standard
product code to order the latching version. The latching OTP
version has a latching OVP as well.
If the OTP/OVP is latched the module can be put in operation
either by switching OFF and ON the input voltage or drive
OFF and ON the RC (Remote Control) pin.
Over Voltage Protection (OVP)
The DC/DC converters have output over voltage protection
that will shut down the DC/DC converter in over voltage
conditions. The DC/DC converter will make continuous
attempts to start up (non-latching mode) and resume normal
operation automatically after removal of the over voltage
condition.
Add suffix “LP” to the standard product code to order the
latchin
g
version. The latchin
g
OVP version has a latchin
g
OTP
as well.
If the OTP/OVP is latched the module can be put in operation
either by switching OFF and ON the input voltage or drive
OFF and ON the RC (Remote Control) pin.
Over Current Protection (OCP)
The DC/DC converters include current limiting circuitry for
protection at continuous overload.
The output voltage will decrease towards zero when the
output current exceeds max output current (max Io).
Under output short circuit, when the output current is in
excess of max output current (max Io), the DC/DC Converter
will enter a hiccup mode protection. The DC/DC converter
will resume normal operation after removal of the overload or
short circuit.
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
15
Ericsson Internal
PRODUCT SPECIFICATION 4 (6)
Prepared (also subject responsible if other) No.
ECHWANG 3/1301-BMR 653 Uen
Approved Checked Date Rev Reference
EXUEFYA 2008-06-30 H
Thermal Consideration
General
The product is designed to operate in various thermal
environments and sufficient cooling must be provided to
ensure reliable operation.
Cooling is achieved mainly by conduction, from the pins to
the host board, and convection. The size and copper
thickness of the host board will have impact on the
Conduction cooling. Convection cooling is dependant on the
airflow across the DC/DC converter. Increased airflow
enhances the cooling of the DC/DC converter.
The Output Current Derating graph found in the Output
section for each model provides the available output current
vs. ambient air temperature and air velocity at V
in
= 53 V.
The DC/DC converter is tested on a 254 x 254 mm,
35 µm (1 oz), 16-layer test board mounted vertically in a wind
tunnel with a cross-section of 305 x 305 mm.
Proper cooling of the DC/DC converter can be verified by
measuring the temperature at reference point. The
temperature at these positions should not exceed the max
values provided in the table below.
Position Device Designation max value
Reference PCB - 125°C
Top view
Definition of reference temperature (T
ref
)
The reference temperature is used to monitor the temperature
limits of the product. Temperatures above maximum T
ref
are
not allowed and may cause degradation or permanent
damage to the product. T
ref
is also used to define the
temperature range for normal operating conditions.
T
ref
is defined by the design and used to guarantee safety
margins, proper operation and reliability of the module.
Ambient Temperature Calculation
By using the thermal resistance the estimated maximum
allowed ambient temperature can be calculated.
1. The power loss is calculated by using the formula
((1/η) - 1) × output power = power losses (Pd).
η = efficiency of converter. E.g 96 % = 0.96
2. Find the thermal resistance (Rth) in the Thermal Resistance
graph found in the Output section for each model.
Calculate the temperature increase (∆T).
∆T = Rth x Pd
3. Max allowed ambient temperature is:
Ta=Max Tref - ∆T.
E.g. PKM4204B PI at 53Vin 20Aout 1.5 m/s
1. ((1/0.96) — 1) x 240W = 10 W
2. 10 W x 3.5
o
C = 35
o
C
3. 125
o
C — 35
o
C = max ambient temperature is 90
o
C
The actual temperature will be dependent on several factors
such as the PCB size, number of layers and direction of
airflow.
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
16
Ericsson Internal
PRODUCT SPECIFICATION 5 (6)
Prepared (also subject responsible if other) No.
ECHWANG 3/1301-BMR 653 Uen
Approved Checked Date Rev Reference
EXUEFYA 2008-06-30 H
Connections
Pin Designation Function
1 +In Positive input
2 RC Remote control
3 Case Case to GND (optional)
4 -In Negative input
5 -Out Negative output
6 +Out Positive output
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
17
Ericsson Internal
PRODUCT SPECIFICATION 1 (3)
Prepared (also subject responsible if other) No.
MICUPEZ 4/1301-BMR 653 Uen
Approved Checked Date Rev Reference
MPM/BK (N. Johansson) See § 1 2007-07-11 C
Mechanical Information
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
18
Ericsson Internal
PRODUCT SPECIFICATION 2 (3)
Prepared (also subject responsible if other) No.
MICUPEZ 4/1301-BMR 653 Uen
Approved Checked Date Rev Reference
MPM/BK (N. Johansson) See § 1 2007-07-11 C
Mechanical Information- Base plate version
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
19
Ericsson Internal
PRODUCT SPECIFICATION 1 (3)
Prepared (also subject responsible if other) No.
MICUPEZ 5/1301-BMR 653 Uen
Approved Checked Date Rev Reference
MPM/BK (N Johansson) See § 1 2007-03-30 A
Soldering Information — Through Hole Mounting
The product is intended for through hole mounting in a PCB.
When wave soldering is used, the temperature on the pins is
specified to maximum 260 °C for maximum 10 seconds.
Maximum preheat rate of 4 °C/s and temperature of max
150 °C is suggested. When hands soldering care should be
taken to avoid direct contact between the hot soldering iron
tip and the pins for more than a few seconds in order to
prevent overheating.
A no-clean (NC) flux is recommended to avoid entrapment of
cleaning fluids in cavities inside of the DC/DC power module.
The residues may affect long time reliability and isolation
voltage.
Delivery package information
The products are delivered in antistatic trays.
Tray specifications
Material PE foam, dissipative
Surface resistance 10E5 to 10E12 ohms/square
Tray capacity 20 converters/tray
Box capacity 20 converters
Weight Product - Open frame
1100 g full, 140 g empty
Product — Base plate option
1480 g full, 140 g empty
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
20
Ericsson Internal
PRODUCT SPECIFICATION 2 (3)
Prepared (also subject responsible if other) No.
MICUPEZ 5/1301-BMR 653 Uen
Approved Checked Date Rev Reference
MPM/BK (N Johansson) See § 1 2007-03-30 A
Product Qualification Specification
Characteristics
External visual inspection IPC-A-610
Change of temperature
(Temperature cycling)
IEC 60068-2-14 Na Temperature range
Number of cycles
Dwell/transfer time
-40 to +100°C
1000
15 min/0-1 min
Cold (in operation) IEC 60068-2-1 Ad Temperature TA
Duration
-45°C
72 h
Damp heat IEC 60068-2-67 Cy Temperature
Humidity
Duration
+85°C
85 % RH
1000 hours
Dry heat IEC 60068-2-2 Bd Temperature
Duration
+125°C
1000 h
Immersion in cleaning solvents IEC 60068-2-45 XA
Method 2
Water
Glycol ether
Isopropyl alcohol
+55 ±5°C
+35 ±5°C
+35 ±5°C
Mechanical shock IEC 60068-2-27 Ea Peak acceleration
Duration
Pulse shape
Directions
Number of pulses
100 g
6 ms
Half sine
6
18 (3 + 3 in each perpendicular direction)
Operational life test MIL-STD-202G
method 108A
with power cycling
Tref
Load
Duration
125°C
Nominal
1000 h
Resistance to soldering heat IEC 60068-2-20 Tb Solder temperature
Duration
Max 270°C
10-13 s
Robustness of terminations IEC 60068-2-21 Ua1 Tensile force 20 N for 10 s
Solderability IEC 60068-2-20 Ta Preconditioning
Temperature, SnPb Eutectic
Temperature, Pb free
Steam ageing 1 h ± 5 min
235 ±5°C
260 ±5°C
Vibration, broad band random IEC 60068-2-64 Fh Frequency
Spectral density
Duration
10 to 500 Hz
0.07 g2/Hz
10 min in each 3 perpendicular directions
E
PKM4000B PI
Intermediate Bus Converters, Input 36-75 V, 33A/380W
EN/LZT 146 305 R5A July 2008
© Ericsson Power Modules AB
Technical Specification
21
