PKM4113DPINB Ericsson Power Modules, PKM4113DPINB Datasheet - Page 24

• Manufacturer Part Number: PKM4113DPINB
• Description: DC/DC Converters & Regulators 12 Vdc 11A Iso Input 36-75V 132W
• Manufacturer: Ericsson Power Modules
• Series: PKM-Dr

Specifications of PKM4113DPINB

• Product: Isolated
• Output Power: 30 W
• Input Voltage Range: 36 V to 75 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 1.5 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

Definition of product operating temperature
The product operating temperatures is used to monitor the
temperature of the product, and proper thermal conditions can
be verified by measuring the temperature at positions P1, P2.
The temperature at these positions T
the maximum temperatures in the table below. The number of
measurement points may vary with different thermal design
and topology. Temperatures above maximum T
at the reference point P1 are not allowed and may cause
permanent damage.
Open frame
E
Position
P1
P2
Prepared (also subject responsible if other)
EXUEFYA
Approved
SEC/D (Betty Wu)
PKM 4000D PINB series
DC/DC converters, Input 36-75 V, Output up to 35 A/132 W
Description
MOSFET
Control IC
P1
P2
P1
, T
P2
should not exceed
Max Temp.
T
T
P1
P2
P1
=125º C
=125º C
Checked
EQUENXU
, measured
Base plate
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. 89.5% = 0.895
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).
3. Max allowed ambient temperature is:
Max T
E.g. PKM 4111D PINBat 1.5m/s:
1.
2. 12.4 W × 3.5°C/W = 43.4°C
3. 125 °C – 43.4°C = max ambient temperature is 81.6°C
The actual temperature will be dependent on several factors
such as the PCB size, number of layers and direction of
airflow.
Ericsson Internal
PRODUCT SPECIFICATION
No.
3/1301-BMR 637 02 Uen
Date
2009-11-20
∆T = Rth x Pd
((
0.91
P1
1
- ∆T.
) –
1) × 125 W = 12.4W
Technical Specification
EN/LZT 146 416 R3A February 2010
© Ericsson AB
Rev
E
P1
P2
Reference
4 (6)
24