BMR456 Datasheet, PDF (39/49 Pages) Ericsson – 2013- 2013- Fully regulated Advanced Bus Converters Input 36-75 V, Output up to 39 A / 468 W

E
Ericsson Internal
PRODUCT SPECIFICATION
7 (8)
Prepared (also subject responsible if other)
No.
EMAOLII
30/1301-BMR 45_T6_eU_ce_hn_{nical Specification 39}
Approved
Checked
Date
Rev
Reference
S^BE^MC^R/D⁴(⁵J⁶uli^sa^eY^roⁱu^e)^{s Fully regulated Adv}E^aZⁿH^cI^eX^dZH^{Bus C}2^o0ⁿ13^v-^e0^r2^t-^e0^r6^{s 1}F^{/28701-FGC 101 1823 revD February 2013}
Input 36-75 V, Output up to 39 A / 468 W
© Ericsson AB
The actual temperature will be dependent on several factors
such as the PWB size, number of layers and direction of
airflow.
Connections (Top view)
Open frame
Pin
1
2
3
4
5
Base plate
(Best air flow direction is from positive to negative pins.)
6
7
Ambient Temperature Calculation
8
For products with base plate the maximum allowed ambient
9
temperature can be calculated by using the thermal
resistance.
10
11
1. The power loss is calculated by using the formula
12
((1/η) - 1) × output power = power losses (Pd).
η = efficiency of product. E.g. 95 % = 0.95
13
14
2. Find the thermal resistance (Rth) in the Thermal Resistance
graph found in the Output section for each model. Note that
15
the thermal resistance can be significantly reduced if a
16
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 T_P1 - ∆T.
E.g. BMR 456 0100/002 at 2m/s:
1. ((
1
0.95
) - 1) × 468 W = 24.6 W
2. 24.6 W × 2.8°C/W = 69.0°C}
3. 125 °C - 69.0°C = max ambient temperature is 56°C
Designation
+In
RC
Case
-In
-Out
S+
S-
SA0
SA1
SCL
SDA
PG
DGND
SALERT
CTRL
+Out
Function
Positive Input
Remote Control
Case to GND (optional)
Negative Input
Negative Output
Positive Remote Sense
Negative Remote Sense
Address pin 0
Address pin 1
PMBus Clock
PMBus Data
Power Good output
PMBus ground
PMBus alert signal
PMBus remote control
Positive Output