PKR2113APIA Ericsson Power Modules, PKR2113APIA Datasheet - Page 20

• Manufacturer Part Number: PKR2113APIA
• Description: Module DC-DC 1-OUT 12V 1A 12W 18-Pin
• Manufacturer: Ericsson Power Modules
• Type: Step Downr

Specifications of PKR2113APIA

• Output Current: 1 A
• Output Voltage: 12 V
• Input Voltage: 18 to 36 V
• Number Of Outputs: 1
• Output Power: 12 W

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
not allowed and may cause degradation or permanent
damage to the product. T
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 converter. E.g. 82 % = 0.82
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. PKR 2610A SI at 1m/s:
1.
2. 1.45 W × 10°C/W =14.5°C
3. 110 °C — 14.5°C = max ambient temperature is 95.5°C
The actual temperature will be dependent on several factors
such as the PCB size, number of layers and direction of
airflow.
ΔT = Rth x Pd
Prepared (also subject responsible if other)
ESKEVIN
Approved
SEC/D (Julia You)
PKR 2000A series
DC/DC converters, Input 18-36 V, Output up to 2 A/15 W
ref
((
is defined by the design and used to guarantee safety
0.82
1
) -
1) × 6.6 W = 1.45 W
ref
is also used to define the
ref
)
Checked
EZYPING
ref
are
Connections
1)
2)
PRODUCT SPECIFICATION
No.
3/1301-BMR 640 1211+ Uen
Date
2007-8-20
Pin
Nominal voltage when pin 8 & 9 are connected together.
Only for duals.
10
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
Designation
Out 1
Rtn
Out 2
NC
NC
NC
Sync
Vadj
NOR
TOA
RC
NC
NC
NC
NC
NC
+ In
-In
18
1
2)
Technical Specifi cation
EN/LZT 146 352 R2C September 2007
© Ericsson Power Modules AB
Rev
B
17
2
16
3
15
4
14
5
Reference
Function
Output 1
Output return
Output 2
Not connected
Not connected
Not connected
Synchronization input
Output voltage adjust
Connection of Nominal Output
voltage Resistor
Turn-on/off input voltage adjust
Remote control. Used to turn-
on/off output
Not connected
Not connected
Not connected
Not connected
Not connected
Positive Input
Negative input
13
6
12
7
11
8
10
9
1)
4 (5)
20