PKR4910ASI Ericsson Power Modules, PKR4910ASI Datasheet - Page 28

• Manufacturer Part Number: PKR4910ASI
• Description: Module DC-DC 1-OUT 3.3V 3A 9.9W 18-Pin SMD
• Manufacturer: Ericsson Power Modules
• Type: Step Downr
• Series: PKRr

Specifications of PKR4910ASI

• Package: 18SMD
• Output Current: 3 A
• Output Voltage: 3.3 V
• Input Voltage: 36 to 75 V
• Number Of Outputs: 1
• Output Power: 9.9 W
• Product: Isolated
• Input Voltage Range: 36 V to 75 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 3 A
• Isolation Voltage: 1.5 KV
• Package / Case Size: MacroDens
• Output Type: Isolated
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Operating information continued
Parallel Operation
Paralleling of several PKR 4000 converters is easily
accomplished by direct connection of the output voltage
terminal pins. The load regulation characteristic is specifically
designed for optimal paralleling performance. Load sharing
between converters will be within ±10%. It is recommended
not to exceed P
maximum converter output power and n the number of
paralleled converters, to prevent overloading any of the
converters and thereby decreasing the reliability performance.
Over Current Protection (OCP)
The PKR 4000 Series DC/DC 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)
ESKEVIN
Approved
SEC/D (Julia You)
PKR 4000 series
PKR 4000 series
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
O
= n x 0.9 x P
Omax
, where P
Omax
O
is the
). The
Checked
EZYPING
Thermal Consideration
General
The PKR 4000 series DC/DC 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 PCB 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
vs. ambient air temperature and air velocity at V
The DC/DC converter is tested on a 254 x 254 mm,
35 μm (1 oz), 8-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 positions P1. The temperature
at this position should not exceed the max values provided in
the table below
Note that the max value is the absolute maximum rating
(non destruction) and that the electrical Output data is
guaranteed up to T
PRODUCT SPECIFICATION
No.
3/1301-BMR 640 1401+ Uen
Date
2007-8-27
Position
P
1
Device
Transformer
Technical Specifi cation
Technical Specifi cation
Technical Specifi cation
EN/LZT 146 302 R6E September 2007
EN/LZT 146 302 R6F November 2007
EN/LZT 146 302 R6G November 2008
© Ericsson Power Modules AB
© Ericsson Power Modules AB
© Ericsson Power Modules AB
Rev
D
ref
+85°C.
Designation
T
P
ref
1
Reference
max value
110º C
in
Air Flow
= 53V.
3 (5)
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