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PKB4000D датащи(PDF) 21 Page - Flex Power Modules. FLEX LTD.

номер детали PKB4000D
подробное описание детали  Fully regulated DC-DC Converters
PDF  28 Pages
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производитель  FLEX [Flex Power Modules. FLEX LTD.]
домашняя страница  https://flexpowermodules.com/
Logo FLEX - Flex Power Modules. FLEX LTD.

PKB4000D датащи(HTML) 21 Page - Flex Power Modules. FLEX LTD.

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Baseplate
Ambient Temperature Calculation
For products with base plate the maximum allowed ambient
temperature can be calculated by using the thermal resistance.
1. The power loss is calculated by using the formula
((1/η) - 1) × output power = power losses (Pd).
η = efficiency of product. E.g. 95.5% = 0.955
2. Find the thermal resistance (Rth) in the Thermal Resistance
graph found in the Output section for each model. Note that
the thermal resistance can be significantly reduced if a
heat sink is mounted on the top of the base plate.
Calculate the temperature increase (
∆T).
∆T = Rth x Pd
3. Max allowed ambient temperature is:
Max TP1 -
∆T.
E.g. PKB4313D at 1m/s:
1. ((
) -
1) × 300 W = 14.1 W
2. 14.1 W × 4.2°C/W = 59°C
3. 125 °C – 59°C = max ambient temperature is 66°C
The actual temperature will be dependent on several factors
such as the PWB size, number of layers and direction of
airflow.
Connections
Pin
Designation
Function
1
+In
Positive Input
2
RC
Remote Control
3
-In
Negative Input
4
-Out
Negative Output
8
+Out
Positive Output
1
0.955
P2
PKB4000D series Fully regulated DC-DC Converters
Input 36-75 V, Output up to 25 A / 300 W
28701-BMR674 01 Rev G
July 2019
© Flex
Technical Specification
21



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