PKM4610PI Ericsson Power Modules, PKM4610PI Datasheet - Page 46

• Manufacturer Part Number: PKM4610PI
• Description: DC/DC Power Supply Single-OUT 3.3V 20A 66W 8-Pin Quarter-Brick
• Manufacturer: Ericsson Power Modules
• Type: Step Downr
• Series: PKMr

Specifications of PKM4610PI

• Package: 8Quarter-Brick
• Output Current: 20 A
• Output Voltage: 3.3 V
• Input Voltage: 36 to 75 V
• Number Of Outputs: 1
• Output Power: 66 W
• Product: Isolated
• Input Voltage Range: 36 V to 75 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 20 A
• Isolation Voltage: 1.5 KV
• Package / Case Size: Quarter Brick
• Output Type: Isolated
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Thermal Consideration
General
The converters are designed to operate in different 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, which is dependant on the
airflow across the converter. Increased airflow enhances the
cooling of the converter.
The Output Current Derating graph found in the Output
section for each model provides the available output current
Operating information continued
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.
Remote Sense
The DC/DC converters have remote sense that can be used
to compensate for voltage drops between the output and the
point of load. The sense traces should be located close to the
PCB ground layer to reduce noise susceptibility. The remote
sense circuitry will compensate for up to 10% voltage drop
between output pins and the point of load.
If the remote sense is not needed +Sense should be
connected to +Out and -Sense should be connected to -Out.
Over Temperature Protection (OTP)
The converters are protected from thermal overload by an
internal over temperature shutdown circuit.
When T
exceeds 110°C the converter will shut down. The converter
can be restarted by cycling the input voltage or using the
remote control function.
Over Voltage Protection (OVP)
The converters have output over voltage protection that will
shut down the converter in over voltage conditions. The
converter can be restarted by cycling the input voltage or
using the remote control function.
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.
Prepared (also subject responsible if other)
ESECZHW
Approved
SEC/D (Linda Zhong)
PKM 4000 PI series
DC/DC converters, Input 36-75 V, Output 35 A/126 W
ref
as defined in thermal consideration section
O
max. It is not recommended to
O
). The
Checked
MICJOHN
vs. ambient air temperature and air velocity at V
The DC/DC converter is tested on a 254 x 254 mm,
cross-section of 305 x 305 mm.
Proper cooling of the DC/DC converter can be verified by
measuring the temperature at positions P1. The temperature
at these positions should not exceed the max values provided
in the table below.
PRODUCT SPECIFICATION
No.
3/1301-BMR631
Date
2006-02-22
16-layer test board mounted vertically in a wind tunnel with a
Position
P
1
Device
Baseplate
Technical Specifi cation
EN/LZT 146 310 R1B Nov 2006
© Ericsson Power Modules AB
Rev
B
TOP VIEW
Designation
T
ref
Reference
Airflow
max value
100º C
in
= 53 V.
4 (6)
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