PKY4716PI Ericsson Power Modules, PKY4716PI Datasheet - Page 16

• Manufacturer Part Number: PKY4716PI
• Manufacturer: Ericsson Power Modules
• Type: Step Downr

Specifications of PKY4716PI

• Output Current: 25 A
• Output Voltage: 28 V
• Input Voltage: 36 to 75 V
• Number Of Outputs: 1
• Output Power: 700 W
• Switching Regulator: Yes

General
The products are designed to operate in different thermal
environments and sufficient cooling must be provided to
ensure reliable operation.
Cooling of the PKY series power modules is achieved mainly
by conduction from the baseplate to a heatsink (“cold wall”).
The PKY series power modules can also operate without a
heatsink but sufficient airflow must be provided. 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 product 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 608 x 203 mm.
For products with base plate used in a sealed box/cold wall
application, cooling is achieved mainly by conduction through
the cold wall. The Output Current Derating graphs are found in
the Output section for each model. The product is tested in a
sealed box test set up with ambient temperatures 85°C. See
Design Note 028 for further details.
Prepared (also subject responsible if other)
ESECZHW
Approved
SEC/D (Julia You)
PKY 4000 PI series
DC/DC converters, Input 36-75 V, Output up to 25 A/700 W
in
= 53 V.
Checked
ECHWANG
Proper cooling of the product can be verified by measuring the
temperature at positions P1, P2, P3, P4 and P5. The
temperature at these positions should not exceed the max
values provided in the table below. The number of points may
vary with different thermal design and topology.
See Design Note 019 for further information.
Definition of reference temperature T
The reference temperature is used to monitor the temperature
limits of the product. Temperatures above maximum T
meassured at the reference point P1 are not allowed and may
cause degradation or permanent damage to the product. T
also used to define the temperature range for normal operating
conditions. T
safety margins, proper operation and high reliability ot the
product.
PRODUCT SPECIFICATION
No.
3/1301- BMR 638/1 Uen
Date
2008-10-9
Position
P1
P2
P3
P4
P5
P1
Description
Baseplate
M1
PCB
D15
T16
is defined by the design and used to guarantee
Technical Specifi cation
EN/LZT 146 380 R2A Oct 2008
© Ericsson Power Modules AB
Rev
C
Reference
P1
Temp. limit
100º C
120º C
125º C
120º C
120º C
P1
,
4 (6)
16
P1
is