PKR4110BSI Ericsson Power Modules, PKR4110BSI Datasheet - Page 29

• Manufacturer Part Number: PKR4110BSI
• Description: Module DC-DC 1-OUT 3.3V 4.5A 14.85W 18-Pin SMD
• Manufacturer: Ericsson Power Modules
• Type: Step Downr
• Series: PKRr

Specifications of PKR4110BSI

• Package: 18SMD
• Output Current: 4.5 A
• Output Voltage: 3.3 V
• Input Voltage: 36 to 75 V
• Number Of Outputs: 1
• Output Power: 14.85 W
• Product: Isolated
• Input Voltage Range: 36 V to 75 V
• Output Voltage (channel 1): 3.3 V
• Output Current (channel 1): 4.5 A
• Isolation Voltage: 1.5 KV
• Package / Case Size: MacroDens
• Output Type: Isolated
• 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
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 85 % = 0.85
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 4713 SI at 1m/s:
1.
2. 1.24 W × 14.0°C/W = 17.3°C
3. 110 °C — 17.3°C = max ambient temperature is 92.7°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 4000 series
PKR 4000 series
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
ref
((
is defined by the design and used to guarantee safety
0.85
1
) -
1) × 7 W = 1.24 W
ref
is also used to define the
ref
)
Checked
EZYPING
ref
are
Connections
1)
PRODUCT SPECIFICATION
No.
3/1301-BMR 640 1401+ Uen
Date
2007-8-27
Pin
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
NC
Vadj
NOR
TOA
RC
NC
NC
NC
NC
NC
- In
+In
1)
18 17 16 15 14 13 12 11 10
Technical Specifi cation
Technical Specifi cation
Technical Specifi cation
EN/LZT 146 302 R6E September 2007
EN/LZT 146 302 R6F November 2007
EN/LZT 146 302 R6G November 2008
© Ericsson Power Modules AB
© Ericsson Power Modules AB
© Ericsson Power Modules AB
Rev
D
1
2
3
4
5
Reference
Function
Output 1
Output return
Output 2
Not connected
Not connected
Not connected
Not connected
Output voltage adjust
Connection of Nominal Output
voltage Resistor
Turn-on/off input voltage adjust
Remote control and turn-on/off
input voltage adjust
Not connected
Not connected
Not connected
Not connected
Not connected
Negative Input
Positive input
6
7
8
9
4 (5)
29