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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
controller circuit in position P2 is 110 °C, but at worst case
operation the temperature is approximately 10 °C higher at
position P1. At light load the temperature is approximately the
same in position P1 and P2. This means the OTP threshold
and hysteresis will be lower at light load conditions when P1 is
used as a reference for OTP.
Products with P2 as reference OTP:
When T
as defined in thermal consideration section exceeds
P2
120 °C the product will shut down. For products with P2 as a
reference for OTP the configured default value in the controller
circuit in position P2 is 120 °C.
The OTP threshold, hysteresis, and fault response of the
product can be reconfigured using the PMBus interface. The
fault response can be configured as follows:
1. Initiate a shutdown and attempt to restart an infinite number
of times with a preset delay period between attempts
(default configuration).
2. Initiate a shutdown and attempt to restart a preset number
of times with a preset delay period between attempts.
3. Continue operating for a given delay period, followed by
shutdown if the fault still exists.
4. Continue operating through the fault (this could result in
permanent damage to the power supply).
5. Initiate an immediate shutdown.
Optimization examples
This product is designed with a digital control circuit. The
control circuit uses a configuration file which determines the
functionality and performance of the product. It is possible to
change the configuration file to optimize certain performance
characteristics. In the table below is a schematic view on how
to change different configuration parameters in order to
achieve an optimization towards a wanted performance.
↑
Increase
→
No change
↓
Decrease
Control
Config.
Switching
parameters
frequency
bandwidth
Optimized
performance
Maximize
↓
efficiency
Minimize
↑
ripple ampl.
Improve
load
↑
transient
response
Minimize
↓
idle power
loss
Diode
loop
NLR
emulation
threshold
(DCM)
→
↑
Enable
Enable
→
↑
or
disable
↑
↓
Disable
↑
→
Enable
Note 1: The following table, graphs and waveforms are only examples
and valid for BMR 464 2008.
Note 2: In the following table and graphs, the worst-case scenario
(load step 37.5-12.5 A) has been considered for load transient
Input idling
P
power
li
(no load)
Input
P
standby
CTRL
power
Load
transient
peak
voltage
V
deviation
tr1
Load step
25-75-25%
of max I
O
Load
Min.
transient
pulse
recovery
time
t
tr1
Disable
Load step
Enable
25-75-25%
or
of max I
O
disable
Disable
Enable
Technical Specification
Technical Specification
1/28701-BMR 464 Rev.B
1/28701-BMR 464 Rev.B
July 2019
July 2019
© Flex
© Flex
V
= 0.6 V
Default
O
configuration:
V
= 1.0 V
O
Continues
V
= 1.8 V
Conduction
O
Mode, CCM
V
= 3.3 V
O
DCM,
V
= 0.6 V
O
Discontinues
V
= 1.0 V
Conduction
O
Mode
V
= 1.8 V
O
(diode
V
= 3.3 V
emulation)
O
V
= 0.6 V
O
DCM with
V
= 1.0 V
Minimum
O
Pulse
V
= 1.8 V
O
Enabled
V
= 3.3 V
O
Default
configuration:
Monitoring
enabled
Pulse
Turned off
monitor
with
mode:
CTRL-pin
Monitoring
disabled
Low power
mode:
Monitoring
disabled
V
= 0.6 V
O
Default
V
= 1.0 V
configuration
O
di/dt = 2 A/μs
V
= 1.8 V
O
C
= 470 μF
O
V
= 3.3 V
O
DLC and
V
= 0.6 V
O
Optimized
V
= 1.0 V
NLR
O
configuration
V
= 1.8 V
O
di/dt = 2 A/μs
V
= 3.3 V
C
= 470 μF
O
O
V
= 0.6 V
O
Default
V
= 1.0 V
configuration
O
di/dt = 2 A/μs
V
= 1.8 V
O
C
=470 μF
O
V
= 3.3 V
O
DLC and
V
= 0.6 V
O
Optimized
V
= 1.0 V
NLR
O
configuration
V
= 1.8 V
O
di/dt = 2 A/μs
V
= 3.3 V
C
= 470 μF
O
O
57
.
0.95
0.95
W
1.22
1.88
0.21
0.21
W
0.21
0.21
0.43
0.46
W
0.54
0.67
170
mW
109
mW
85
mW
300
300
mV
305
315
100
100
mV
100
100
100
100
100
100
µs
50
50
50
50
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