PKB4513PINBLC Ericsson Power Modules, PKB4513PINBLC Datasheet - Page 14

• Manufacturer Part Number: PKB4513PINBLC
• Description: DC/DC Switching Controllers DC/DC CONV in 36-60V output 12V 4A 48W
• Manufacturer: Ericsson Power Modules

Specifications of PKB4513PINBLC

• Number Of Outputs: 1
• Output Voltage: 12 V
• Output Current: 4 A
• Output Power: 48 W
• Switching Frequency: 230 KHz to 270 KHz
• Mounting Style: Screw
• Package / Case: Eighth Brick
• Maximum Operating Temperature: + 120 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

E
Operating information
Input Voltage
The input voltage range 36 to 60Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for normal
input voltage range in-48 Vdc systems.
At input voltages exceeding 60 V, the power loss will be higher
than at normal input voltage and T
absolute max +120°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 2V.
Remote Control (RC)
The maximum required sink current is 1 mA. When the RC pin
is left open, the voltage generated on the RC pin is
6 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 converter will turn on when the input voltage
is applied with the RC pin 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 converter will restart automatically when this
connection is opened.
See Design Note 021 for detailed information.
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 converters are designed for stable operation
without external capacitors connected to the input or output.
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 100 µF capacitor
across the input of the converter will ensure stable operation.
The capacitor is not required when powering the DC/DC
converter from an input source with an inductance below
10 µH.
EZYPING
Approved
SEC/D (Julia You)
PKB 4513 Direct Converters
Input 48 V, Output 4 A / 48 W
The products are fitted with a
remote control function referenced
to the primary negative input
connection (- In), with negative and
positive logic options available.
The RC function allows the
converter to be turned on/off by an
external device like a
semiconductor or mechanical
switch.
P1
must be limited to
Checked
ESECZHW
3/1301-BMR 636 03/53C45 Uen
Date
2009-5-22
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.
External decoupling capacitors will become part of the control
loop of the DC/DC converter and may affect the stability
margins. An 470uF lower ESR capacitor should be added at
output to get the load transient performance specified in the
datasheet. The module can work with 0-3000uF low ESR
capacitor at output in 25°C and 95°C, but it can only handle 0-
1000uF low ESR capacitor at output in -40°C . The ESR of the
capacitors is a very important parameter. Power Modules
guarantee stable operation with a verified ESR value of >10
mΩ across the output connections.
For further information please contact your local Ericsson
Power Modules representative.
Parallel Operation
Two converters may be paralleled for redundancy if the total
power is equal or less than P
parallel the converters without using external current sharing
circuits.
See Design Note 006 for detailed information.
Over Temperature Protection (OTP)
The converters are protected from thermal overload by the
control IC.
When T
exceeds 135°C the converter will shut down. The DC/DC
converter will make continuous attempts to start up (non-
latching mode) and resume normal operation automatically
when the temperature has dropped about 15°C below the
temperature threshold.
Over Current Protection (OCP)
The converters include current limiting circuitry for protection
at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of max output current (max I
converter will resume normal operation after removal of the
overload. The load distribution should be designed for the
maximum output short circuit current specified.
P1
as defined in thermal consideration section
Technical Specification
EN/LZT 146 407 R2A February 2010
© Ericsson AB
Rev
A
O
max. It is not recommended to
Reference
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). The
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