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BMR46 series PoL Regulators
BMR46 series PoL Regulators
Input 4.5-14 V, Output up to 50 A / 165 W
Input 4.5-14 V, Output up to 50 A / 165 W
EMC Specification
Conducted EMI measured according to test set-up below.
The fundamental switching frequency is 320 kHz at V
max I
.
O
Conducted EMI Input terminal value (typical for default
configuration)
EMI without filter for BMR 464 2008
RF Current probe
1kHz – 50MHz
Battery
supply
C1
50mm
800mm
Conducted EMI test set-up
Layout Recommendations
The radiated EMI performance of the product will depend on
the PWB 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.
A ground layer will increase the stray capacitance in the PWB
and improve the high frequency EMC performance.
= 12 V,
I
To spectrum
analyzer
Resistive
load
POL
C1 = 10uF / 600VDC
Feed- Thru RF capacitor
200mm
Technical Specification
Technical Specification
1/28701-BMR 464 Rev.B
1/28701-BMR 464 Rev.B
© Flex
© Flex
Output Ripple and Noise
Output ripple and noise is measured according to figure below.
A 50 mm conductor works as a small inductor forming together
with the two capacitors as a damped filter.
Vout
S
Output
Capacitor
S
470 µF/10 mΩ
GND
Output ripple and noise test set-up.
Operating information
Power Management Overview
This product is equipped with a PMBus interface. The product
incorporates a wide range of readable and configurable power
management features that are simple to implement
with a minimum of external components. Additionally, the
product includes protection features that continuously
safeguard the load from damage due to unexpected system
faults. A fault is also shown as an alert on the SALERT pin.
The following product parameters can continuously be
monitored by a host: Input voltage, output voltage/current,
and internal temperature. If the monitoring is not needed it can
be disabled and the product enters a low power mode reducing
the power consumption. The protection features are not
affected.
The product is delivered with a default configuration suitable
for a wide range operation in terms of input voltage, output
voltage, and load. The configuration is stored in an internal
Non-Volatile Memory (NVM). All power management functions
can be reconfigured using the PMBus interface. Please contact
your local Flex representative for design support of custom
configurations or appropriate SW tools for design and
download of your own configurations.
Input Voltage
The input voltage range, 4.5 - 14 V, makes the product
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.
July 2019
July 2019
50 mm conductor
Tantalum
Ceramic
Capacitor
Capacitor
10 µF
0.1 µF
50 mm conductor
BNC-contact to
oscilloscope
49
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