NBM
™
in a VIA Package
Bus Converter
NBM3814x60E12A7yzz
®
S
C
US
C
NRTL
US
Non-Isolated, Fixed-Ratio DC-DC Converter
Features & Benefits
•
Up to 170A continuous low voltage side current
•
Fixed transformation ratio (K) of 1/5
•
Up to 1046W/in
3
power density
•
97.8% peak efficiency
•
Bidirectional operation capability
•
Integrated ceramic capacitance filtering
•
Parallel operation for multi-kW arrays
•
OV, OC, UV, short circuit and thermal protection
•
3814 package
•
High MTBF
•
Thermally enhanced VIA package
V
HI
= 54V (36 – 60V)
V
LO
= 10.8V (7.2 – 12.0V)
(
no load
)
Product Ratings
I
LO
= up to 170A
K = 1/5
Product Description
The NBM3814x60E12A7yzz in a VIA package is a high efficiency
Bus Converter, operating from a 36 to 60V
DC
high voltage bus to
deliver a non-isolated 7.2 to 12V
DC
unregulated, low voltage.
This unique, ultra-low profile module incorporates DC-DC
conversion and integrated filtering in a chassis or PCB
mount form factor.
The NBM offers low noise, fast transient response and industry
leading efficiency and power density.
Leveraging the thermal and density benefits of Vicor VIA packaging
technology, the NBM module offers flexible thermal management
options with very low top and bottom side thermal impedances.
When combined with downstream Vicor DC-DC conversion
components and regulators, the NBM allows the Power Design
Engineer to employ a simple, low-profile design, which will
differentiate the end system without compromising on cost or
performance metrics.
The NBM non-isolated topology allows start up and steady
state operation in forward and reverse directions. It provides
bidirectional protections. However if the powertrain is disabled
by any protection and V
LO
is present, then a voltage equal to V
LO
minus two diode drops will appear on the high voltage side.
Typical Applications
•
DC Power Distribution
•
Information and Communication
Technology (ICT) Equipment
•
High End Computing Systems
•
Automated Test Equipment
•
Industrial Systems
•
High Density
Energy Systems
•
Transportation
Part Ordering Information
Product
Function
NBM
NBM =
Non-Isolated
Bus Converter
Module
[a]
Size:
3.76 x 1.40 x 0.37in
[95.59 x 35.54 x 9.40mm]
High
Max
Side
Low
Voltage
Side
Range
Voltage
Ratio
E
15
Package
Length
38
Length in
Inches x 10
Package
Width
14
Width in
Inches x 10
Package
Type
x
B = Board VIA
V = Chassis VIA
Max
High
Side
Voltage
60
Max
Low
Product Grade
Side
(Case Temperature)
Current
A7
y
C = –20 to 100°C
[a]
T = –40 to 100°C
[a]
Option Field
zz
00 = Chassis/Always On
04 = Short Pin/Always On
08 = Long Pin/Always On
Internal Reference
High Temperature Current Derating may apply; See Figure 1, specified thermal operating area.
NBM
™
in a VIA Package
Page 1 of 25
Rev 1.5
02/2018
NBM3814x60E12A7yzz
Electrical Specifications
Specifications apply over all line and load conditions, unless otherwise noted;
boldface
specifications apply over the temperature range of
–40°C
≤
T
CASE
≤
100°C (T-Grade); all other specifications are at T
CASE
= 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
General Powertrain Specification – Forward Direction Operation (High Voltage Side to Low Voltage Side)
HI Side Voltage Range,
(Continuous)
HI Side Voltage
Initialization Threshold
HI Side Quiescent Current
V
HI_DC
V
µC_ACTIVE
I
HI_Q
Hi side voltage where internal controller is initialized,
(powertrain inactive)
Disabled, V
HI_DC
= 54V
T
CASE
≤
100ºC
V
HI_DC
= 54V, T
CASE
= 25ºC
No Load Power Dissipation
P
HI_NL
V
HI_DC
= 54V
V
HI_DC
= 36 – 60V, T
CASE
= 25 ºC
V
HI_DC
= 36 – 60V
HI Side Inrush Current Peak
DC HI Side Current
Transformation Ratio
LO Side Current (Continuous)
LO Side Current (Pulsed)
I
HI_INR_PK
I
HI_IN_DC
K
I
LO_OUT_DC
I
LO_OUT_PULSE
V
HI_DC
= 60V, C
LO_EXT
= 3000µF,
R
LOAD_LO
= 20% of full load current
T
CASE
≤
100ºC
At I
LO_OUT_DC
= 170A, T
CASE
≤
90ºC
High voltage to low voltage,
K = V
LO_DC
/ V
HI_DC
, at no load
T
CASE
≤
90°C
10ms pulse, 25% duty cycle,
I
LO_OUT_AVG
≤
50% rated I
LOC_OUT_DC
V
HI_DC
= 54V, I
LO_OUT_DC
= 170A
Efficiency (Ambient)
η
AMB
η
HOT
η
20%
R
LO_COLD
LO Side Output Resistance
R
LO_AMB
R
LO_HOT
Switching Frequency
LO Side Voltage Ripple
F
SW
V
LO_OUT_PP
V
HI_DC
= 36V to 60V, I
LO_OUT_DC
= 170A
V
HI_DC
= 54V, I
LO_OUT_DC
= 85A
Efficiency (Hot)
Efficiency (Over Load Range)
V
HI_DC
= 54V, I
LO_OUT_DC
= 170A, T
CASE
= 90°C
34A < I
LO_OUT_DC
< 170A
V
HI_DC
= 54V, I
LO_OUT_DC
= 170A, T
CASE
= –40°C
V
HI_DC
= 54V, I
LO_OUT_DC
= 170A
V
HI_DC
= 54V, I
LO_OUT_DC
= 170A, T
CASE
= 90°C
LO side voltage ripple frequency = 2x F
SW
C
LO_EXT
= 0µF, I
LO_OUT_DC
= 170A, V
HI_DC
= 54V,
20MHz BW
T
CASE
≤
100ºC
96.5
95.6
97.3
96.2
95
0.5
0.8
1.1
1.02
1.1
1.3
1.7
1.07
125
400
1.5
1.8
2.0
1.12
MHz
mV
mΩ
97.8
96.5
%
%
97
%
1/5
170
200
15
50
34.4
A
V/V
A
A
8
10
7
12
12
19
14
22
A
W
36
60
15
V
V
mA
NBM
™
in a VIA Package
Page 5 of 25
Rev 1.5
02/2018
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