PMN8118UWP Ericsson Power Modules, PMN8118UWP Datasheet - Page 41

• Manufacturer Part Number: PMN8118UWP
• Description: DC/DC Converters & Regulators 0.7-3.6V 30A Non-Iso Input 5.5-14V 108W
• Manufacturer: Ericsson Power Modules
• Series: PMNr

Specifications of PMN8118UWP

• Output Power: 108 W
• Input Voltage Range: 5.5 V to 14 V
• Number Of Outputs: 1
• Output Voltage (channel 1): 0.7 V to 3.6 V
• Output Current (channel 1): 30 A
• Output Type: POLA Non-Isolated Regulator
• Product: Non-Isolated / POL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Thermal Consideration continued
Definition of reference temperature (T
The reference temperature is used to monitor the
temperature limits of the product. Temperatures above
maximum T
or permanent damage to the product. T
define the temperature range for normal operating
conditions.
T
margins, proper operation and high reliability of the
module.
Ambient Temperature Calculation
By using the thermal resistance the maximum allowed
ambient temperature can be calculated.
1. The power loss is calculated by using the formula
((1/η) - 1) × output power = power losses (Pd).
η = efficiency of regulator. 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.
Calculate the temperature increase (ΔT).
3. Max allowed ambient temperature is:
Max Tref - ΔT.
E.g PMN 8118UW P at 0m/s:
1.
2. 7.91 W × 13.5°C/W = 106.8°C
3. 130 °C – 106.8°C = max ambient temperature is 23.2°C
The actual temperature will be dependent on several factors
E
ΔT = Rth x Pd
Prepared (also subject responsible if other)
EYIPYAN
Approved
SEC/D (Julia You)
PMN 8000 series PoL Regulator
Input 5.5 - 14 V, Output up to 30 A / 108 W
ref
((
is defined by the design and used to guarantee safety
0.926
1
ref
) -
are not allowed and may cause degradation
1) × 99 W = 7.91 W
ref
ref
)
is also used to
Checked
EQUENXU
such as the PCB size, number of layers and direction of
airflow.
Ericsson Internal
PRODUCT SPECIFICATION
No.
3/1301-BMR656 8118 Uen
Date
2007-7-9
Technical Specification
EN/LZT 146 387 R1B December 2009
© Ericsson AB
Rev
B
Reference
9 (12)
41