Ericsson Internal
E
SECSUND
PRODUCT SPECIFICATION
1 (7)
Prepared (also subject responsible if other)
No.
30/1301-BMR 451 0002 Uen
12
Technical Specification
Approved
Checked
Date
Rev
Reference
EN/LZT 146 401 R4A May 2015
BMR 451 Digital PoL Regulators
Input 4.5-14 V, Output up to 40 A / 132 W
2015-05-15
PJ1
© Ericsson AB
EMC Specification
Output Ripple and Noise
Conducted EMI measured according to test set-up below.
The fundamental switching frequency is 320 kHz at VI = 12 V,
max Io.
Output ripple and noise is measured with the filter according to
figure below. A 50 mm conductor works as a small inductor
forming together with the two capacitances a damped filter.
Conducted EMI Input terminal value (typ)
50 mm conductor
Vout
Ceramic
Capacitor
0.1 µF
Tantalum
Capacitor
10 µF
+S
−S
GND
50 mm conductor
BNC-contact to
oscilloscope
Output ripple and noise test set-up.
Operating Information
Input Voltage
EMI without filter
The input voltage range, 4.5 - 14 V, makes the products easy
to use in intermediate bus applications when powered by a
non-regulated bus converter or a regulated bus converter. See
Ordering Information for input voltage range.
To spectrum
analyzer
Turn-off Input Voltage Range
RF Current probe
1kHz – 50MHz
The product monitors the input voltage and will turn-on and
turn-off at configured levels. The default turn-on input voltage
level setting is 4.4 V, whereas the corresponding turn-off input
voltage level is 4.0 V. Hence, the default hysteresis between
turn-on and turn-off input voltage is 0.4 V. The turn-on and
turn-off levels can be reconfigured using the PMBus interface.
Please contact your local Ericsson Power Modules
representative for design support of custom configurations or
appropriate SW tools for design and down-load of new
configurations.
Resistive
load
Battery
supply
C1
POL
50mm
C1 = 10uF / 600VDC
Feed- Thru RF capacitor
Remote Control
The product is equipped with a
200mm
800mm
remote control function, i.e., the
CTRL pin. The remote control can
be referenced to either the primary
Vext
Conducted EMI test set-up
negative input connection (GND) or
to an external voltage (Vext), which
is a 3 - 5 V positive supply voltage in
accordance with the SMBus
CTRL
GND
Layout Recommendations
The radiated EMI performance of the product will depend on
the PCB layout and ground layer design. It is also important to
consider the stand-off of the product. If a ground layer is used,
it should be connected to the output of the product and the
equipment ground or chassis.
Specification version 2.0.
The CTRL function allows the product to be turned on/off by an
external device like a semiconductor or mechanical switch. By
default the product will turn on with the CTRL pin is left open
and turn off when the CTRL pin is applied to GND. The CTRL
pin has an internal pull-up resistor. The maximum required sink
current is 0.5 mA. When the CTRL pin is left open, the voltage
generated on the CTRL pin is max 6 V. The product can also
be configured using the PMBus to be “Always on”, i.e., starts
A ground layer will increase the stray capacitance in the PCB
and improve the high frequency EMC performance.
ERICSSON [ ERICSSON ]
