PKJ 4518 PIT/PKJ 4318 PIT/PKJ 4218 PIT
Advanced Specification
15-30A DC/DC Power Modules
48V Input, 1.8V Output
• High efficiency 87.5% Typ (15A)
at full load
• Industry standard footprint
• Max case temperature +100ºC
• Wide input voltage range according
to ETSI specifications
• High power density, up to 55W/in3
• 1,500 Vdc isolation voltage
• MTBF > 3 million hours in
accordance with Bellcore TR-332
The PKJ series represents a “third generation” of High
Density DC/DC Power Modules providing high efficiencies.
To achieve this high efficiency, Ericsson uses proprietary drive
and control circuits with planar magnetics and low resistivity
multilayer PCB technology, and a patent pending topology
with active rectification. The PKJ series can be used without
bulky and height consuming heatsinks, resulting in a lower
total cost. This also provides narrow board spacing for elec-
tronic, shelf based applications.
The products are in the industry standard package size and
offer a beneficial alternative to competing products on the
market. Because for certain applications they may not
require heatsinks, they are ideal for cost sensitive or high-
density applications.
The PKJ series also offers the flexibility of using a heatsink
when needed, enabling reduced airflow, extended reliability
or higher ambient temperature operation in a wide range of
48V and 60V DC powered systems. Similar to other
Ericsson Power Modules, the PKJ series includes an under-
voltage shut down facility, protecting the associated batteries
from being too deeply discharged. The PKJ series also offers
over-voltage protection, over-temperature protection and is
short circuit proof.
These products are manufactured using highly automated
manufacturing lines with a world-class quality commitment
and a five-year warranty. Ericsson Microelectronics has been
an ISO 9001 certified supplier since 1991.
For product program please see back cover.
Characteristics Conditions min typ max Unit
VIInput voltage 36 75 Vdc
range
VIoff Turn-off input Ramping from 31 33 Vdc
voltage higher voltage
VIon Turn-on input Ramping from 34 36 Vdc
voltage lower voltage
CIInput capacitance 2.35 µF
IIac Reflected 5 Hz to 20 MHz 20 mA p-p
ripple current
IImax Maximum input VI= VImin 27 W 1.0 A
current 36 W 1.3
54 W 2.0
PIi Input idling power IO= 0 2.5 7.5 W
PRC Input
stand-by power VI= 50V RC open 0.6 1.5 W
(turned off with RC)
TRIM Maximum input 6 Vdc
voltage on trim pin
General
Input TC < TCmax
Designation Function
-In Negative input
Case Connected to base plate
RC Remote control (primary).
To turn-on and turn-off the output
+In Positive input
-Out Negative output
-Sen Negative remote sense
(if sense is not needed, connect to -Out)
Trim Output voltage adjust
+Sen Positive remote sense
(if sense is not needed, connect to +Out)
+Out Positive output
Connections
Weight
85 grams
Case
Aluminum baseplate with metal standoffs.
Pins
Pin material: Brass
Pin plating: Tin/Lead over Nickel.
Mechanical Data
PKJ 4518 PIT/PKJ 4318 PIT/PKJ 4218 PIT TC= -40...+100°C, VI= 36...75 V dc unless otherwise specified.
Characteristics Conditions Device Output Unit
min typ max
VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax All 1.77 1.8 1.83 V
setting and accuracy
Output adjust range IO= 0 to IOmax All 1.44 2.0 V
IOOutput current A
VOOutput voltage IO= 0 to IOmax All 1.71 1.89 V
tolerance band
Line regulation IO= IOmax All 2 15 mV
Load regulation VI= 53V, IO= 0 to IOmax All 2 15 mV
V
tr Load transient Load step = 0.25 x IOmax All ±100 mVpeak
voltage deviation dI/dt = 1A/µs
ttr Load transient All 50 µs
recovery time
tsStart-up time From VIconnection to VO= 0.9 x VOnom All 20 30 ms
IIim Current limit threshold VO= 0.96 VOnom @ TC<100°C A
ISC Short circuit current A
VOac Output ripple and noise IO= IOmax f<20 MHz All 60 120 mVp-p
SVR Supply voltage f<1kHz All -50 dB
rejection (ac)
OVP Over voltage protection Vin = 50V All 2.5 2.9 V
Output
Characteristics Conditions Device min typ max Unit
ηEfficiency TA= +25°C, VI= 53V, IO= IOmax %
PdPower dissipation IO= IOmax, VI= 53V W
Miscellaneous
Thermal Data
Characteristics min max Unit
TCCase temperature -40 +100 °C
@ max output power
TSStorage temperature -40 +125 °C
VIContinuous input voltage -0.5 +80 Vdc
VISO Isolation voltage 1,500 Vdc
(input to output test voltage)
VRC Remote control voltage 15 Vdc
I2t Inrush transient 1 A2s
Absolute Maximum Ratings
80
82
84
86
88
90
0102030
PKJ 4518 PIT Efficiency (typ)
36V
53V
75V
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.
8.8
5.4
3.9
86
87
87.5
PKJ 4518 PIT
PKJ 4318 PIT
PKJ 4218 PIT
030
020
015
PKJ 4518 PIT
PKJ 4318 PIT
PKJ 4218 PIT
PKJ 4518 PIT
PKJ 4318 PIT
PKJ 4218 PIT
PKJ 4518 PIT
PKJ 4318 PIT
PKJ 4218 PIT
PKJ 4518 PIT
PKJ 4318 PIT
PKJ 4218 PIT
30.5 35 40
20.5 24 29
15.5 18 21
36 40
25 29
19 21
Ericsson Microelectronics’ Sales Offices:
Brazil: Phone: +55 11 681 0040 Fax: +55 11 681 2051
Denmark: Phone: +45 33 883 109 Fax: +45 33 883 105
Finland: Phone: +358 9 299 4098 Fax: +358 9 299 4188
France: Phone: +33 1 4083 7720 Fax: +33 1 4083 7741
Germany: Phone: +49 211 534 1516 Fax: +49 211 534 1525
Great Britain: Phone: +44 1793 488 300 Fax: +44 1793 488 301
Hong Kong: Phone: +852 2590 2356 Fax: +852 2590 7152
Italy: Phone: +39 2 7014 4203 Fax: +39 2 7014 4260
Japan: Phone: +81 3 5216 9091 Fax: +81 3 5216 9096
Norway: Phone: +47 66 841 906 Fax: +47 66 841 909
Russia: Phone: +7 095 247 6211 Fax: +7 095 247 6212
Spain: Phone: +34 91 339 1858 Fax: +34 91 339 3145
Sweden: Phone: +46 8 721 6258 Fax: +46 8 721 7001
United States: Phone: +1 877 374 2642 Fax: +1 972 583 8355
Ericsson Inc.
Microelectronics
701 North Glenville Drive
Richardson, Texas 75081
Phone: 877-ERICMIC
www.ericsson.com/micro
Information given in this data sheet is believed
to be accurate and reliable. No responsibility is
assumed for the consequences of its use nor for
any infringement of patents or other rights of
third parties which may result from its use. No
license is granted by implication or otherwise
under any patent or patent rights of Ericsson
Inc. These products are sold only according to
Ericsson Inc.’s general conditions of sale, unless
otherwise confirmed in writing.
The contents of this document are subject
to revision without notice due to continued
progress in design and manufacturing.
Advanced Specification
AE/LZT 108 3967 R1
© Ericsson Inc., April 2000
VIVO/IOPOmax Ordering Number
48/60 V 1.8V/30A 54W PKJ 4518 PIT
48/60 V 1.8V/20A 36W PKJ 4318 PIT
48/60 V 1.8V/15A 27W PKJ 4218 PIT
Product Program
Option Suffix EExxaammppllee
Product Options
Negative remote on/off logic
Industry Standard Trim,
(i.e. Vout Adjust)
Positive remote on/off logic
Lead length of 0.145" ± 0.010"
–
P
LA
PKJ 4518 PIT
PKJ 4518 PIPT
PKJ 4518 PITLA
The PKJ 4000 DC/DC power modules will be available with the different
options listed in the Product Options table.
Please check with the factory for availability.
