Not Recommended For New Designs
NBM
™
in
a VIA™ Package
Bus Converter
®
S
NBM3814x46C15A6yzz
C
US
C
NRTL
US
Non-Isolated, Fixed-Ratio DC-DC Converter
Features & Benefits
•
Up to 160A continuous low-voltage-side current
•
Fixed transformation ratio (K) of 1/3
•
Up to 1258W/in
3
power density
•
97.9% 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
= 42V (36 – 46V)
V
LO
= 14V (12 – 15.3V)
(
no load
)
Product Ratings
I
LO
= up to 160A
K = 1/3
Product Description
The NBM3814x46C15A6yzz in a VIA package is a high-efficiency
Bus Converter, operating from a 36 to 46V
DC
high-voltage bus to
deliver a non-isolated 12 to 15.3V
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]
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
High‑Side
Max
Max
Max
Voltage
Product Grade
High‑Side
Low‑Side Low‑Side
Range
(Case Temperature)
Voltage
Voltage Current
Ratio
46
C
15
A6
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 1.6
08/2018
Not Recommended For New Designs
Electrical Specifications
NBM3814x46C15A6yzz
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
= 42V
T
CASE
≤ 100ºC
V
HI_DC
= 42V, T
CASE
= 25ºC
No-Load Power Dissipation
P
HI_NL
V
HI_DC
= 42V
V
HI_DC
= 36 – 46V, T
CASE
= 25 ºC
V
HI_DC
= 36 – 46V
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
= 46V, C
LO_EXT
= 3000μF,
R
LOAD_LO
= 20% of full-load current
T
CASE
≤ 100ºC
At I
LO_OUT_DC
= 160A, T
CASE
≤ 85ºC
High voltage to low voltage,
K = V
LO_DC
/ V
HI_DC
, at no load
T
CASE
≤ 85°C
10ms pulse, 25% duty cycle,
I
LO_OUT_AVG
≤ 50% rated I
LO_OUT_DC
V
HI_DC
= 42V, I
LO_OUT_DC
= 160A
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 46V, I
LO_OUT_DC
= 160A
V
HI_DC
= 42V, I
LO_OUT_DC
= 80A
Efficiency (Hot)
Efficiency (Over Load Range)
V
HI_DC
= 42V, I
LO_OUT_DC
= 160A, T
CASE
= 85°C
32A < I
LO_OUT_DC
< 160A
V
HI_DC
= 42V, I
LO_OUT_DC
= 160A, T
CASE
= –40°C
V
HI_DC
= 42V, I
LO_OUT_DC
= 160A
V
HI_DC
= 42V, I
LO_OUT_DC
= 160A, T
CASE
= 85°C
LO-side voltage ripple frequency = 2x F
SW
C
LO_EXT
= 0μF, I
LO_OUT_DC
= 160A,
V
HI_DC
= 42V, 20MHz BW
T
CASE
≤ 100ºC
96.8
96.5
97.3
96.7
95
0.8
0.9
1.5
1.14
1.3
1.7
2.1
1.20
110
205
1.7
2.1
2.4
1.26
MHz
mV
mΩ
97.8
97.1
%
%
97.6
%
1/3
160
176
30
75
53.9
A
V/V
A
A
5
12.5
8
12
19.5
28
22
31
A
W
36
46
15
V
V
mA
NBM
™
in a VIA™ Package
Page 5 of 25
Rev 1.6
08/2018
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