PKJ4319PIP - Ericsson Microelectronics

PKJ 4000 PI

37.5-150W DC/DC Power Modules

48V Input Series

• High efficiency 91.5% Typ (5V)

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 90% efficiency.

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 batter-

ies 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 Components AB has been

an ISO 9001 certified supplier since 1991. For product

program please see back cover.

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics min max Unit

TCMaximum Operating Case Temperature -40 +100 °C

TSStorage temperature -40 +125 °C

VIContinuous input voltage -0.5 +75 Vdc

VISO Isolation voltage 1,500 Vdc

(input to output test voltage)

VRC Remote control voltage 15 Vdc

I2t Inrush transient 1 A2s

Characteristics Conditions min typ max Unit

VIInput voltage 36 72 Vdc

range1)

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 2.8 µF

IIac Reflected 5 Hz to 20 MHz-150W 20 mA p-p

ripple current

50 W 1.6

IImax Maximum input VI= VImin 75 W 2.4 A

current 100 W 3.2

150 W 5.3

PIi Input idling power IO= 0 2.5 7.5 W

PRC Input

stand-by power VI= 50V RC open .05 2.5 W

(turned off with RC)

TRIM Maximum input 6 Vdc

voltage on trim pin

Characteristics Test procedure & conditions

Random IEC 68-2-34EdFrequency 10...500 Hz

Vibration Spectral density 0.025 g2/Hz

Duration 10 min in each

direction

Sinusoidal IEC 68-2-6 Fc Frequency 10-500 Hz

Vibration Amplitude 0.75mm

Acceleration 10g

# of cycles 10 in each axis

Shock IEC 68-2-27 EaPeak acceleration 50 g

(half sinus) Duration 3ms

Temperature IEC 68-2-14 NaTemperature -40°C...+100°C

change Number of cycles 300

Accelerated IEC 68-2-3 Ca Temperature 85°C

damp heat with bias Humidity 85% RH

Duration 500 hours

Solder IEC 68-2-20 Tb Temperature, solder 260° C

resistibility method IA Duration 10...13 s

General

Absolute Maximum Ratings

Input TC < TCmax

Environmental Characteristics

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.

For design margin and to enhance system reliability,

it is recommended that the PKJ series DC/DC power

modules are operated at case temperatures below 90°C.

1) See also Input Voltage in the Operating

Information section

Safety

The PKJ Series DC/DC power modules are

designed to comply with EN 60 950 Safety of

information technology equipment including

electrical business equipment.

The PKJ DC/DC power modules are also

recognized by UL and meet the applicable

requirements in UL 1950, Safety of information

technology equipment and applicable Canadian

safety requirements.

The isolation is an operational insulation in

accordance with EN 60 950. The DC/DC power

module should be installed in end-use equipment,

in compliance with the requirements of the

ultimate application, and is intended to be

supplied by an isolated secondary circuit.

Consideration should be given to measuring

the case temperature to comply with TCmax

when in operation.

When the supply to the DC/DC power

module meets all the requirements for SELV

(<60Vdc), the output is considered to remain

within SELV limits (level 3). If connected to a 60V

DC power 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.

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

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 not needed, connect to -Out)

Trim Output voltage adjust

+Sen Positive remote sense (if sense 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

Safety (continued)

The galvanic isolation is verified in an electric strength test. The

test voltage (VISO) between input and output is 1,500 Vdc for

60 sec. Leakage current is less than 1µA @ 50Vdc.

Flammability ratings of the terminal support and internal plastic

construction details meet UL 94V-0.

A fuse should be used at the input of each PKJ series power module.

If a fault occurs in the power module, that imposes a short on the

input source, this fuse will provide the following two functions:

• Isolate the failed module from the input source so that the

remainder of the system may continue operation.

• Protect the distribution wiring from

overheating.

A fast blow fuse should be used with a rating of 10A or less. It is

recommended to use a fuse with the lowest current rating, that is

suitable for the application.

Thermal Data

The PKJ series DC/DC power modules has a robust thermal design

which allows operation at case (baseplate) temperatures (TC) up to

+100°C. The main cooling mechanism is convection (free or forced)

through the case or optional heatsinks.

The graph above shows the allowable maximum output

current to maintain a maximum +100°C case temperature.

Note that the ambient temperature is the air temperature

adjacent to the power module which is typically elevated

above the room environmental temperature.

The graphs below can be used to estimate case temperatures

for given system operating conditions (see Thermal design).

For further information on optional heatsinks, please contact

your local Ericsson sales office.

Thermal Design

The thermal data can be used to determine thermal performance

without a heatsink.

Case temperature is calculated by the following formula:

TC= TA+ Pdx RthC-A where Pd= PO(1/η- 1)

Where:

TC: Case Temperature

TA: Local Ambient Temperature

Pd: Dissipated Power

RthC-A: Thermal Resistance from TCto TA

The efficiency ηcan be found in the tables on the following pages.

For design margin and to enhance system reliability, it is recommend-

ed that the PKJ series DC/DC power modules are operated at case

temperatures below 90°C.

4Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 2.45 2.5 2.55 V

setting and accuracy

Output adjust range IO= 0 to IOmax 2.0 2.75 V

VOOutput voltage IO= 0 to IOmax 2.38 2.63 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 2 15 mV

Load regulation VI= 53V, IO= 0 to IOmax 2 15 mV

Vtr Load transient Load step = 0.25 x IOmax ±160 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 35 55 ms

IOOutput current 0 30 A

POmax Max output power At VO= VOnom 75 W

Ilim Current limit threshold VO= 0.90 x VOnom @ TC<100°C 31 35 41 A

ISC Short circuit current 35 41 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1 kHz -53 dB

rejection

OVP Overvoltage protection 3.0 3.3 3.9 V

Output

PKJ 4719 PI (75W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 84 87 %

PdPower dissipation IO= IOmax, VI= 53V 11.2 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 150 kHz

Miscellaneous

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 2.45 2.50 2.55 V

setting and accuracy

Output adjust range IO= 0 to IOmax 2.0 2.75 V

VOOutput voltage IO= 0 to IOmax 2.38 2.63 V

tolerance band

Line regulation VI= 36...72VIO= 0 to IOmax 2 15 mV

Load regulation VI= 53V, IO= 0 to IOmax 2 15 mV

Vtr Load transient Load step = 0.25 x IOmax ±100 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 30 55 ms

IOOutput current 0 20 A

POmax Max output power At VO= VOnom 50 W

IIim Current limit threshold VO= 0.90 x VOnom @ TC<100°C 21 25 31 A

ISC Short circuit current 25 31 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1 kHz -53 dB

rejection

OVP Overvoltage protection 3.0 3.3 3.9 V

Output

PKJ 4519 PI (50W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

6Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 86 89 %

PdPower dissipation IO= IOmax, VI= 53V 6.2 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 150 kHz

Miscellaneous

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 2.45 2.50 2.55 V

setting and accuracy

Output adjust range IO= 0 to IOmax 2.0 2.75 V

VOOutput voltage IO= 0 to IOmax 2.38 2.63 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 2 15 mV

Load regulation VI= 53V, IO= 0 to IOmax 2 15 mV

Vtr Load transient Load step = 0.25 x IOmax ±90 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tSStart-up time From VIconnection to VO= 0.9 x VOnom 30 55 ms

IOOutput current 0 15 A

POmax Max output power At VO= VOnom 37.5 W

IIim Current limit threshold VO= 0.90 x VOnom @ TC<100°C 16 17 24 A

ISC Short circuit current 17 25 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1 kHz 53 dB

rejection

OVP Overvoltage protection 3.0 3.3 3.9 V

Output

PKJ 4319 PI (37.5W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 86 89 %

PdPower dissipation IO= IOmax, VI= 53V 4.6 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 150 kHz

Miscellaneous

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 3.25 3.30 3.35 V

setting and accuracy

Output adjust range IO= 0 to IOmax 2.64 3.63 V

VOOutput voltage IO= 0 to IOmax 3.2 3.4 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 1 10 mV

Load regulation VI= 53V, IO= 0 to IOmax 1 10 mV

tr Load transient Load step = 0.25 x IOmax ±180 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tSStart-up time From VIconnection to VO= 0.9 x VOnom 35 60 ms

IOOutput current 0 30 A

POmax Max output power At VO= VOnom 100 W

IIim Current limit threshold VO= 0.90 x VOnom @ TC<100°C 31 35 39 A

ISC Short circuit current 35 41 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1kHz -53 dB

rejection (ac)

OVP Over voltage protection VI= 53V 3.9 4.4 5.0 V

Output

PKJ 4910 PI (99W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

8Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 86 89 %

PdPower dissipation IO= IOmax, VI= 50V 12.2 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 150 kHz

Miscellaneous

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

PKJ 4610 PI (66W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 3.25 3.30 3.35 V

setting and accuracy

Output adjust range IO= 0 to IOmax 2.64 3.63 V

VOOutput voltage IO= 0 to IOmax 3.2 3.4 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 1 10 mV

Load regulation VI= 53V, IO= 0 to IOmax 1 10 mV

tr Load transient Load step = 0.25 x IOmax ±140 mVpeak

Voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 35 60 ms

IOOutput current 0 20 A

POmax Max output power At VO= VOnom 66.6 W

IIim Current limit threshold VO= 0.90 x VOnom @ TC<100°C 21 24 30 A

ISC Short circuit current 28 32 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1kHz -53 dB

rejection (ac)

OVP Over voltage protection 3.9 4.4 5.0 V

Output

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 88 90.5 %

PdPower dissipation IO= IOmax, VI= 53V 6.93 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 150 kHz

Miscellaneous

PKJ 4510 PI (50W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 3.25 3.30 3.35 V

setting and accuracy

Output adjust range IO= 0 to IOmax 2.64 3.63 V

VOOutput voltage IO= 0 to IOmax 3.2 3.4 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 1 10 mV

Load regulation VI= 53V, IO= 0 to IOmax 1 10 mV

tr Load transient Load step = 0.25 x IOmax ±100 mVpeak

Voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 35 60 ms

IOOutput current 0 15 A

POmax Max output power At VO= VOnom 50 W

IIim Current limit threshold VO= 0.90 x VOnom @ TC<100°C 16 19 22 A

ISC Short circuit current 21 23 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1kHz -53 dB

rejection (ac)

OVP Over voltage protection 3.9 4.4 5.0 V

Output

10 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 88 90.5 %

PdPower dissipation IO= IOmax, VI= 53V 5.2 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 150 kHz

Miscellaneous

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 4.9 5.0 5.1 V

setting and accuracy

Output adjust range IO= 0.1 to IOmax 4.0 5.5 V

VOOutput voltage IO= 0.1 to IOmax 4.85 5.15 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 5 20 mV

Load regulation VI= 53V, IO= 0.1 to IOmax 5 20 mV

Vtr Load transient Load step = 0.25 x IOmax ±200 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 50 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 55 90 ms

IOOutput current 0 30 A

POmax Max output power At VO= VOnom 150 W

IIim Current limit threshold VO= .90 x VOnom @ TC<100°C 31 35 42 A

ISC Short circuit current 35 41 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1 kHz -53 dB

rejection (ac)

OVP Over voltage protection 5.8 6.1 7 V

Output

PKJ 4111 API (150W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 88 90.5 %

PdPower dissipation IO= IOmax, VI= 53V 15.7 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 200 kHz

Miscellaneous

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 4.9 5.0 5.1 V

setting and accuracy

Output adjust range IO= 0 to IOmax 4.0 5.5 V

VOOutput voltage IO= 0 to IOmax 4.85 5.15 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 5 20 mV

Load regulation VI= 53V, IO= 0.1 to IOmax 5 20 mV

Vtr Load transient Load step = 0.25 x IOmax ±120 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 20 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 55 90 ms

IOOutput current 0 20 A

POmax Max output power At VO= VOnom 100 W

IIim Current limiting threshold VO= 0.90 x VOnom @ TC<100°C 21 25 32 A

ISC Short circuit current 25 31 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f<1 kHz -53 dB

rejection (ac)

OVR Over voltage protection 5.8 6.1 7 V

Output

PKJ 4111 PI (100W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

12 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 89 91.5 %

PdPower dissipation IO= IOmax, VI= 53V 9.3 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 200 kHz

Miscellaneous

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Characteristics Conditions Output

min typ max Unit

VOi Output voltage initial TC= +25°C, VI= 53V, IO= IOmax 4.9 5.0 5.1 V

setting and accuracy

Output adjust range IO= 0 to IOmax 4.0 5.5 V

VOOutput voltage IO= 0 to IOmax 4.85 5.15 V

tolerance band

Line regulation VI= 36...72V, IO= IOmax 5 20 mV

Load regulation VI= 53V, IO= 0.1 to IOmax 5 20 mV

Vtr Load transient Load step = 0.25 x IOmax ±100 mVpeak

voltage deviation dI/dt = 1A/µs

ttr Load transient 15 µs

recovery time

tsStart-up time From VIconnection to VO= 0.9 x VOnom 55 90 ms

IOOutput current 0 15 A

POmax Max output power At VO= VOnom 75 W

IIim Current limiting threshold VO= 0.90 x VOnom @ TC<100°C 16 20 26 A

ISC Short circuit current 22 25 A

VOac Output ripple and noise IO= IOmax f < 20 MHz 75 150 mVp-p

SVR Supply voltage f† 1 kHz -53 dB

rejection (ac)

OVP Over voltage protection 5.8 6.1 7 V

Output

PKJ 4711 PI (75W)

TC= -40...+100°C, VI= 36...72 V dc unless otherwise specified.

Characteristics Conditions min typ max Unit

ηEfficiency TA= +25°C, VI= 53V, IO= IOmax 89 91.5 %

PdPower dissipation IO= IOmax, VI= 53V 7.0 W

fOSwitching frequency IO= 0.1...1.0 x IOmax 200 kHz

Miscellaneous

Typical Characteristics

PKJ 4719 PI (75W)



PKJ 4519 PI (50W)

PKJ 4319 PI (37.5W)



14 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

PKJ 4910 PI (99W)



PKJ 4610 PI (66W)



PKJ 4510 PI (50W)



PKJ 4111 API (150W)

PKJ 4111 PI (100W)

PKJ 4711 PI (75W)



16 Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

Data Sheet AE/LZT 137 57 R1 © Ericsson Components AB, August 1999

EMC Specifications

The PKJ power module is mounted on a double sided printed circuit board PCB with groundplane during EMC

measurements.

The fundamental switching frequency is 200 kHz @ IO= IOmax.

Conducted EMI

Input terminal value with 100µF capacitor (typ) and additional PI filter.

dBuV

0.15MHz 30MHz

EMI Filter for PKJ Module

1.0MHz 10MHz

L1: 425µH, 8.1A (Coilcraft P3217A)

L2: 22µH, 7A (Coilcraft D055022-223)

Remote Sense

All PKJ series DC/DC power modules have remote sense that can

be used to compensate for moderate amounts of resistance in the

distribution system and allow for voltage regulation at the load or

other selected point. The remote sense lines will carry very little

current and do not need a large cross sectional area. However, the

sense lines on a PCB should be located close to a ground trace or

ground plane. In a discrete wiring situation, the usage of twisted pair

wires or other technique for reducing noise susceptibility is

recommended.

The power module will compensate for up to 0.5 V voltage drop

between the sense voltage and the voltage at the power module

output pins. The output voltage and the remote sense voltage

offset must be less than the minimum overvoltage trip point.

If the remote sense is not needed the -Sen should be connected

to -Out and +Sen should be connected to +Out.

Current Limiting

General Characteristics

All PKJ series DC/DC power modules include current limiting circuitry

that makes them able to withstand continuous overloads or short circuit

conditions on the output. The output voltage will decrease toward zero

for heavy overloads (see product code characteristics).

The power module will resume normal operation after removal of the

overload. The load distribution system should be designed to carry

the maximum short circuit output current specified (see applicable

code typical characteristics).

Over Voltage Protection (OVP)

All PKJ DC/DC power modules have latching output overvoltage

protection. In the event of an overvoltage condition, the power mod-

ule will shut down. The power module can be restarted by cycling

the input voltage.

Turn-off Input Voltage (VIoff)

The power module monitors the input voltage and will turn on and

turn off at predetermined levels.

Operating Information

Input Voltage

The input voltage range 36...72V meets the requirements in the

European Telecom Standard ETS 300 132-2 for normal input voltage

range in -48 V and -60 V DC power systems, -40.5...-57.0 V and

-50.0...-72.0 V respectively. At input voltages exceeding 72 V,

(abnormal voltage), the power loss will be higher than at normal

input voltage and TCmust be limited to absolute max +90º C. The

absolute max continuous input voltage is 75 V DC. Output charac-

teristics will be marginally affected at input voltages exceeding 72 V.

Remote Control (RC)

The RC pin can be wired directly to -In, to allow the module to

power up automatically without the need for control signals.

A mechanical switch or an open collector transistor or FET can be

used to drive the RC inputs. The device must be capable of sinking

up to 1mA at a low level voltage of 1.0V, maximum of 15 V dc, for

the primary RC.

RC (primary) Power module

Low ON

Open/High OFF

Output Voltage Adjust (Trim)

Voltage Trimming

All PKJ series DC/DC power modules have an Output Voltage

Adjust pin. This pin can be used to adjust the output voltage

above or below VOi. When increasing the output voltage, the

voltage at the output pins (including any remote sensing offset)

must be kept below the overvoltage trip point. Also note that

at elevated output voltages the maximum power rating of the

module remains the same, and the output current capability will

decrease correspondingly.

To decrease VOconnect Radj from - SEN to Trim

To increase VOconnect Radj from + SEN to Trim

Decrease : Radj = (21*VO-2.5)/(2.5-VO) k ohm

Increase : Radj = (9.7*VO+1.225)/(0.49*VO-1.225) k ohm

Decrease : Radj = (11VO-3.3)/(3.3-VO) k ohm

Increase : Radj = 15.94*(VO+0.207)/(VO-3.3) k ohm

Decrease : Radj = (11VO-4.965)/(4.965-VO) k ohm

Increase : Radj = (7.286*VO+1.225)/(0.2467*VO-1.225) k ohm

Standard Remote Control RC (primary) Power module

Low OFF

Open/High ON

Optional Remote Control

Paralleling for Redundancy

The figure below shows how n + 1 redundancy can be achieved.

The diodes on the power module outputs allow a failed module

to remove itself from the shared group without pulling down the com-

mon output bus. This configuration can be extended to

additional numbers of power modules and they can also be

controlled individually or in groups by means of signals to the

primary RC inputs.

Output Ripple & Noise (VOac)

Output ripple is measured as the peak to peak voltage from 0 to

20MHz which includes the noise voltage and fundamental.

Over Temperature Protection

The PKJ DC/DC power modules are protected from thermal overload

by an internal over temperature shutdown circuit. When the case

temperature exceeds +110°C, the power module will automatically

shut down (latching). To restart the module the input voltage must

be cycled. The internal temperature is a few degrees higher than the

case (baseplate) temperature.

Input and Output Impedance

The impedance of both the power source and the load will interact

with the impedence of the DC/DC power module. It is most important

to have the ratio between L and C as low as possible, i.e. a low charac-

teristic impedance, both at the input and output, as the power mod-

ules have a low energy storage capability. The PKJ series of DC/DC

power modules has been designed to be completely stable without the

need for external capacitors on the input or output when configured

with low inductance input and output circuits. The performance in

some applications can be enhanced by the addition of external capaci-

tance as described below. If the distribution of the input voltage source

to the power module contains significant inductance, the addition of a

220-470 µF capacitor across the input of the power module will help

insure stability. Tantalum capacitors are not recommended due to their

low ESR-value. This capacitor is not required when powering the

module from a low impedance source with short, low inductance,

input power leads.

Output Capacitance

When powering loads with significant dynamic current requirements,

the voltage regulation at the load can be improved by the addition of

decoupling capacitance at the load. The most effective technique is to

locate low ESR ceramic capacitors as close to the load as possible, using

several capacitors to lower the effective ESR. These ceramic capacitors

will handle the short duration high frequency components of the

dynamic current requirement. In addition, higher values of electrolytic

capacitors should be used to handle the mid frequency components. It

is equally important to use good design practices when configuring the

DC distribution system.

Low resistance and low inductance PCB (printed circuit board) layouts

and cabling should be used. Remember that when using remote sens-

ing, all the resistance, inductance and capacitance of the distribution

system is within the feedback loop of the power module. This can have

an effect on the modules compensation and the resulting stability and

dynamic response performance.

As a rule of thumb, 100 µF/A of output current can be used without

any additional analysis. For example, with a 30A (max PO150W)

power module, values of decoupling capacitance up to 3000 µF can be

used without regard to stability. With larger values of capacitance, the

load transient recovery time can exceed the specified value. As much of

the capacitance as possible should be outside of the remote sensing

loop and close to the load.The absolute maximum value of output

capacitance is 10,000 µF. For values larger than this contact your local

Ericsson representative.

Quality

Reliability

The calculated MTBF of the PKJ module family is 3 million

hours using Bellcore TR-332 methodology. The calculation is valid

for an ambient temperature of 40°C and an output load 80% of

rated maximum.

Quality Statement

The power modules are designed and manufactured in an industrial

environment where quality systems and methods like ISO 9000, 6σ,

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

Ericsson Components warrants to the original purchaser or end user

that the products conform to this Data Sheet and are free from material

and workmanship defects for a period of five (5) years from the date of

manufacture, if the product is used within specified conditions and not

opened.

In case the product is discontinued, claims will be accepted up to three

(3) years from the date of the discontinuation. For additional details on

this limited warranty we refer to Ericsson Components AB’s “General

Terms and Conditions of Sales”, EKA 950701, or individual contract

documents.

Limitation of Liability

Ericsson Components 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).

Ericsson Energy Systems’ 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: +1 888 853 6374 Fax: +1 972 583 7999

Ericsson Components AB

Energy Systems Division

SE-164 81 Kista-Stockholm, Sweden

Phone: +46 8 721 6258 Fax: +48 8 721 7001

Internet: www.ericsson.com/energy

Information given in this data sheet is believed

to be accurate and reliable. No respnsibility 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

Components. These products are sold only

according to Ericsson Components’ general

conditions of sale, unless otherwise confirmed

in writing.

Specifications subject to change without notice.

Preliminary Data Sheet

AE/LZT 137 57 R1

VIVO/IOPOmax Ordering Number

48/60 V 2.5V/30A 75W PKJ 4719 PI

48/60 V 2.5V/20A 50W PKJ 4519 PI

48/60 V 2.5V/15A 37.5W PKJ 4319 PI

48/60 V 3.3V/30A 100W PKJ 4910 PI

48/60 V 3.3V/20A 66W PKJ 4610 PI

48/60 V 3.3V/15A 50W PKJ 4510 PI

48/60 V 5V/30A 150W PKJ 4111 API

48/60 V 5V/20A 100W PKJ 4111 PI

48/60 V 5V/15A 75W PKJ 4711 PI

Product Program

To order with Optional Remote Control add P to end of ordering number for

example PKJ 4719 PIP.