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參數(shù)資料
| 型號： | BMR4532101/000 |
| 廠商： | ERICSSON POWER MODULES AB |
| 元件分類： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, QUARTER-BRICK PACKAGE-16 |
| 文件頁數(shù)： | 5/22頁 |
| 文件大?。?/td> | 2708K |
| 代理商： | BMR4532101/000 |
Ericsson Internal
PRODUCT SPECIFICATION
2 (5)
Prepared (also subject responsible if other)
No.
EANDKUL
30/1301-BMR 453 Uen
Approved
Checked
Date
Rev
Reference
EAB/FJB/GMF (Natalie Johansson)
(MICJMAL)
2009-02-02
C
Operating information
Input Voltage
The input voltage range 36 to 75 Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for normal
input voltage range in –48 and –60 Vdc systems,
-40.5 to -57.0 V and –50.0 to -72 V respectively.
At input voltages exceeding 75 V, the power loss will be higher
than at normal input voltage and Tref must be limited to
absolute max 125 C. The absolute maximum continuous input
voltage is 80Vdc.
Turn-off Input Voltage
The DC/DC converters monitor the input
voltage and will turn on and turn off at predetermined levels.
The turn on and turn off level and the hysteresis in between
can be configured via the PMBus.
The default hysteresis between turn on and turn off input
voltage is set to 2 V.
Remote Control (RC)
The products are fitted with a
configurable remote control
function. The primary remote control
is referenced to the primary
negative input connection (-In). The
RC function allows the converter to
be turned on/off by an external
device like a semiconductor or
mechanical switch. The RC pin has
an internal pull up resistor. The
remote control functions can also be
configured using the PMBus.
The maximum required sink current is 1 mA. When the RC pin
is left open, the voltage generated on the RC pin is
max 6 V. The logic options for the primary remote control is
configured using the PMBus. The default setting is negative
logic.
Input and Output Impedance
The impedance of both the input source and the load will
interact with the impedance of the DC/DC converter. It is
important that the input source has low characteristic
impedance. The performance in some applications can be
enhanced by addition of external capacitance as described
under External Decoupling Capacitors. If the input voltage
source contains significant inductance, the addition of a 100
F capacitor across the input of the converter will ensure
stable operation. The capacitor is not required when powering
the DC/DC converter from an input source with an inductance
below 10 H.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the point of load can be
improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic and
electrolytic capacitors as close to the load as possible, using
several parallel capacitors to lower the effective ESR. The
ceramic capacitors will handle high-frequency dynamic load
changes while the electrolytic capacitors are used to handle
low frequency dynamic load changes. Ceramic capacitors will
also reduce any high frequency noise at the load.
It is equally important to use low resistance and low
inductance PCB layouts and cabling.
External decoupling capacitors will become part of the control
loop of the DC/DC converter and may affect the stability
margins. As a “rule of thumb”, 100 F/A of output current can
be added without any additional analysis. The ESR of the
capacitors is a very important parameter. Power Modules
guarantee stable operation with a verified ESR value of >10
m across the output connections.
For further information please contact your local Ericsson
Power Modules representative.
Parallel Operation
TBD. For further information please contact your local sales
representative.
PMBus configuration and support
The BMR 453 DC/DC converters provide a PMBus digital
interface that enables the user to configure many aspects of
the device operation as well as monitor the input and output
parameters. Please contact your local Ericsson Power
Modules representative for appropriate SW tools to down-load
new configurations.
Output Voltage Adjust using PMBus
The output voltage of the product can be reconfigured using
the PMBus interface. The output voltage can be adjusted from
9V to 13.2V
Margin Up/Down Controls
These controls allow the output voltage to be momentarily
adjusted, either up or down, by a nominal 5 %. This provides a
convenient method for dynamically testing the operation of the
load circuit over its supply margin or range. It can also be used
to verify the function of supply voltage supervisors.
The margin up and down levels of the product can be re-
configured using the PMBus interface.
Soft-start Power Up
The soft-start control introduces a time-delay (default setting
40 ms) before allowing the output voltage to rise. The default
rise time of the ramp up is 10 ms. Power-up is hence
completed within 50 ms in default configuration using remote
control. When starting by applying input voltage the control
circuit boot-up time adds an additional 100 ms delay. The soft-
start power up of the product can be reconfigured using the
PMBus interface.
E
BMR 453
DC/DC Converters, Input 36-75V, Output 33A/400 W
EN/LZT 146 395 R1C February 2009
Ericsson AB
Technical Specication
13
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