NBM™ Bus Converter
NBM6123x46C15A6yzz
®
C
S
US
C
NRTL
US
Non-Isolated, Fixed Ratio DC-DC Converter
Features & Benefits
Product Ratings
• Up to 160A continuous secondary current
• Up to 3600W/in3 power density
• 98.2% peak efficiency
• Parallel operation for multi-kW arrays
• OV, OC, UV, short circuit and thermal protection
• 6123 through-hole ChiP™ package
■■2.402 x 0.990 x 0.284in
(61.00 x 25.14 x 7.21mm)
• Bidirectional start up and steady state operation
Typical Applications
• DC Power Distribution
• High End Computing Systems
• Automated Test Equipment
• Industrial Systems
• High Density Power Supplies
• Communications Systems
• Transportation
VPRI = 42V (36 – 46V)
ISEC = up to 160A
VSEC = 14V (12.0 – 15.3V)
(no load)
K = 1/3
Product Description
The NBM6123x46C15A6yzz is a high efficiency Non-Isolated Bus
Converter, operating from a 36 – 46VDC primary bus to deliver a
non-isolated, ratiometric secondary voltage from 12.0 – 15.3VDC.
The NBM6123x46C15A6yzz offers low noise, fast transient
response, and industry leading efficiency and power density. In
addition, it provides an AC impedance beyond the bandwidth of
most downstream regulators, allowing input capacitance normally
located at the input of a PoL regulator to be located at the primary
side of the NBM. With a primary to secondary K factor of 1/3, that
capacitance value can be reduced by a factor of 9x, resulting in
savings of board area, material and total system cost.
Leveraging the thermal and density benefits of Vicor’s ChiP
packaging technology, the NBM offers flexible thermal
management options with very low top and bottom side thermal
impedances. Thermally-adept ChiP-based power components
enable customers to achieve low cost power system solutions
with previously unattainable system size, weight and efficiency
attributes quickly and predictably.
The NBM non-isolated topology allows start up and steady
state operation in forward and reverse directions and provides
bidirectional protections. However if the power train is disabled
by any protection and VSEC is present, then a voltage equal to VSEC
minus two diode drops will appear on the primary side.
NBM™ Bus Converter
Page 1 of 26
Rev 1.6
11/2017
NBM6123x46C15A6yzz
Typical Applications
NBM
TM
EN
enable/disable
switch
VAUX
FUSE
+VSEC
+VPRI
SGND
VPRI
PGND
PRIMARY
SECONDARY
CI_NBM_ELEC
POL
SOURCE_RTN
NBM6123x46C15A6yzz + Point of Load
NBM™ Bus Converter
Page 2 of 26
Rev 1.6
11/2017
NBM6123x46C15A6yzz
Pin Configuration
1
TOP VIEW
2
+VSEC
A
A’ +VSEC
PGND1
B
B’ PGND2
PGND1
C
C’ PGND2
+VSEC
D
D’ +VSEC
+VSEC
E
E’
+VSEC
PGND1
F
F’
PGND2
PGND1
G
G’ PGND2
+VSEC
H
H’ +VSEC
+VPRI
I
I’
TM
+VPRI
J
J’
EN
+VPRI
K
K’ VAUX
+VPRI
L
L’
SGND
6123 ChiP Package
Pin Descriptions
Pin Number
Signal Name
Type
Function
I1, J1, K1, L1
+VPRI
PRIMARY POWER
I’2
TM
OUTPUT
J’2
EN
INPUT
K’2
VAUX
OUTPUT
L’2
SGND
SIGNAL RETURN
Signal return terminal only. Do not connect to PGND
A1, D1, E1, H1, A’2,
D’2, E’2, H’2
+VSEC
SECONDARY
POWER
Positive secondary auto-transformer power terminal
B1, C1, F1, G1
B’2, C’2, F’2, G’2
PGND *
POWER RETURN
Positive primary auto-transformer power terminal
Temperature Monitor; Primary side referenced signals
Enables and disables power supply; Primary side referenced signals
Auxiliary Voltage Source; Primary side referenced signals
Common negative primary and secondary auto-transformer power return terminal
* For proper operation an external low impedance connection must be made between listed -PGND1 and PGND2 terminals.
NBM™ Bus Converter
Page 3 of 26
Rev 1.6
11/2017
NBM6123x46C15A6yzz
Part Ordering Information
Product
Function
Package
Size
Package
Mounting
Max Primary
Input Voltage
Range
Identifier
Max
Secondary
Voltage
Secondary
Output
Current
Temperature
Grade
Option
NBM
6123
x
46
C
15
A6
y
zz
61 = L
23 = W
T = TH
00 = Analog Ctrl
Non-isolated
Bus Converter
Module
S = SMT
46V
15V
No Load
36 – 46V
160A
T = –40°C to 125°C
01 = PMBus Ctrl
M = –55°C to 125°C
0R = Reversible Analog Ctrl
0P = Reversible PMBus Ctrl
All products shipped in JEDEC standard high profile (0.400” thick) trays (JEDEC Publication 95, Design Guide 4.10).
Standard Models
Product
Function
Package
Size
Package
Mounting
Max Primary
Input Voltage
Range
Identifier
Max
Secondary
Voltage
Secondary
Output
Current
Temperature
Grade
Option
NBM
6123
T
46
C
15
A6
T
0R
Absolute Maximum Ratings
The absolute maximum ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to the device.
Parameter
Comments
+VPRI_DC to –VPRI_DC
Min
Max
Unit
–1
60
V
1
V/µs
20
V
4.6
V
5.5
V
4.6
V
VPRI_DC or VSEC_DC Slew Rate
(Operational)
+VSEC_DC to –VSEC_DC
–1
TM to –VPRI_DC
EN to –VPRI_DC
–0.3
VAUX to –VPRI_DC
NBM™ Bus Converter
Page 4 of 26
Rev 1.6
11/2017
NBM6123x46C15A6yzz
Electrical Specifications
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
46
V
15
V
General Powertrain PRIMARY to SECONDARY Specification (Forward Direction)
Primary Input Voltage Range
(Continuous)
VPRI µController
PRI to SEC Input Quiescent Current
36
VPRI_DC
VµC_ACTIVE
IPRI_Q
VPRI_DC voltage where µC is initialized,
(i.e., VAUX = low, powertrain inactive)
Disabled, EN low, VPRI_DC = 42V
8
TINTERNAL ≤ 100ºC
12
VPRI_DC = 42V, TINTERNAL = 25ºC
PRI to SEC No Load
Power Dissipation
PRI to SEC Inrush Current Peak
PPRI_NL
IPRI_INR_PK
12.5
5
VPRI_DC = 42V
28
22
VPRI_DC = 36 – 46V
31
30
TINTERNAL ≤ 100ºC
DC Primary Input Current
Transformation Ratio
Secondary Output Current
(Continuous)
Secondary Output Current (Pulsed)
PRI to SEC Efficiency (Ambient)
IPRI_IN_DC
K
ηAMB
A
At ISEC_OUT_DC = 160A, TINTERNAL ≤ 100ºC
53.9
Primary to secondary, K = VSEC_DC / VPRI_DC, at no load
1/3
10ms pulse, 25% duty cycle,
ISEC_OUT_AVG ≤ 50% rated ISEC_OUT_DC
VPRI_DC = 42V, ISEC_OUT_DC = 160A
97.4
VPRI_DC = 36V to 46V, ISEC_OUT_DC = 160A
97.1
VPRI_DC = 42V, ISEC_OUT_DC = 80A
97.5
98.2
96.9
97.4
160
A
176
A
98
%
ηHOT
VPRI_DC = 42V, ISEC_OUT_DC = 160A
PRI to SEC Efficiency
(Over Load Range)
η20%
32A < ISEC_OUT_DC < 160A
90
RSEC_COLD
VPRI_DC = 42V, ISEC_OUT_DC = 160A, TINTERNAL = –40°C
0.8
0.95
1.1
RSEC_AMB
VPRI_DC = 42V, ISEC_OUT_DC = 160A
0.9
1.3
1.7
RSEC_HOT
VPRI_DC = 42V, ISEC_OUT_DC = 160A, TINTERNAL = 100°C
1.5
1.75
2.0
FSW
Frequency of the output voltage ripple = 2x FSW
1.14
1.20
1.26
VSEC_OUT_PP
CSEC_EXT = 0μF, ISEC_OUT_DC = 160A, VPRI_DC = 42V,
20MHz BW
Switching Frequency
Secondary Output Voltage Ripple
Secondary Output Leads Inductance
(Parasitic)
NBM™ Bus Converter
Page 5 of 26
%
%
110
TINTERNAL ≤ 100ºC
Primary Input Leads Inductance
(Parasitic)
A
V/V
PRI to SEC Efficiency (Hot)
PRI to SEC Output Resistance
W
75
ISEC_OUT_DC
ISEC_OUT_PULSE
19.5
VPRI_DC = 36 – 46V, TINTERNAL = 25 ºC
VPRI_DC = 46V, CSEC_EXT = 3000μF,
RLOAD_SEC = 20% of full load current
mA
mΩ
MHz
mV
205
LPRI_IN_LEADS
Frequency 2.5MHz (double switching frequency),
simulated lead model
3
nH
LSEC_OUT_LEADS
Frequency 2.5MHz (double switching frequency),
simulated lead model
0.64
nH
Rev 1.6
11/2017
NBM6123x46C15A6yzz
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
General Powertrain PRIMARY to SECONDARY Specification (Forward Direction) Cont.
Effective Primary Capacitance
(Internal)
CPRI_INT
Effective Value at 42VPRI_DC
16.8
µF
Effective Secondary Capacitance
(Internal)
CSEC_INT
Effective Value at 14VSEC_DC
140
µF
Rated Secondary Output
Capacitance (External)
CSEC_OUT_EXT
Excessive capacitance may drive module into
short circuit protection
Rated Secondary Output
Capacitance (External),
Parallel Array Operation
CSEC_OUT_AEXT
CSEC_OUT_AEXT Max = N • 0.5 • CSEC_OUT_EXT MAX, where
N = the number of units in parallel
3000
µF
1010
ms
Protection PRIMARY to SECONDARY (Forward Direction)
Auto Restart Time
tAUTO_RESTART
Start up into a persistent fault condition. Non-latching
fault detection given VPRI_DC > VPRI_UVLO+
940
Primary Overvoltage
Lockout Threshold
VPRI_OVLO+
48
50
52
V
Primary Overvoltage
Recovery Threshold
VPRI_OVLO–
46
48
50
V
Primary Overvoltage
Lockout Hysteresis
VPRI_OVLO_HYST
2
V
Primary Overvoltage
Lockout Response Time
tPRI_OVLO
30
µs
Primary Undervoltage
Lockout Threshold
VPRI_UVLO–
28
30
32
V
Primary Undervoltage
Recovery Threshold
VPRI_UVLO+
30
32
34
V
Primary Undervoltage
Lockout Hysteresis
VPRI_UVLO_HYST
2
V
tPRI_UVLO
100
µs
30
ms
1
ms
Primary Undervoltage
Lockout Response Time
From VPRI_DC = VPRI_UVLO+ to powertrain active, EN
Primary Undervoltage Start Up Delay tPRI_UVLO+_DELAY floating (i.e., one time start up delay from application
of VPRI_DC to VSEC_DC)
Primary Soft Start Time
tPRI_SOFT_START
Secondary Output Overcurrent
Trip Threshold
ISEC_OUT_OCP
Secondary Output Overcurrent
Response Time Constant
tSEC_OUT_OCP
Secondary Output Short Circuit
Protection Trip Threshold
ISEC_OUT_SCP
Secondary Output Short Circuit
Protection Response Time
tSEC_OUT_SCP
Overtemperature
Shutdown Threshold
tOTP+
Overtemperature
Recovery Threshold
tOTP–
Undertemperature
Shutdown Threshold
tUTP
Undertemperature Restart Time
NBM™ Bus Converter
Page 6 of 26
tUTP_RESTART
From powertrain active. Fast current limit protection
disabled during soft start
177
Effective internal RC filter
200
240
4
ms
240
A
1
Temperature sensor located inside controller IC
°C
110
Temperature sensor located inside controller IC;
Protection not available for M-Grade units.
Start up into a persistent fault condition. Non-latching
fault detection given VPRI_DC > VPRI_UVLO+
Rev 1.6
11/2017
µs
125
105
A
3
115
°C
–45
°C
s
NBM6123x46C15A6yzz
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
15.3
V
General Powertrain SECONDARY to PRIMARY Specification (Reverse Direction)
Secondary Input Voltage Range,
(Continuous)
12
VSEC_DC
VSEC_DC = 14V, TINTERNAL = 25ºC
SEC to PRI No Load
Power Dissipation
PSEC_NL
DC Secondary Input Current
ISEC_IN_DC
Primary Output Current (Continuous)
IPRI_OUT_DC
Primary Output Current (Pulsed)
IPRI_OUT_PULSE
5
VSEC_DC = 14V
ηAMB
20
29
VSEC_DC = 12 – 15.3V, TINTERNAL = 25ºC
22
31
At IPRI_DC = 53.3A, TINTERNAL ≤ 100ºC
162
A
53.3
A
58.7
A
10ms pulse, 25% duty cycle,
IPRI_OUT_AVG ≤ 50% rated IPRI_OUT_DC
97
98
VSEC_DC = 12V to 15.3V, IPRI_OUT_DC= 53.3A
96.7
%
VSEC_DC = 14V, IPRI_OUT_DC = 26.7A
97.6
98.3
96.6
97
SEC to PRI Efficiency (Hot)
ηHOT
VSEC_DC = 14V, IPRI_OUT_DC = 53.3A
SEC to PRI Efficiency
(Over Load Range)
η20%
10.66A < IPRI_OUT_DC < 53.3A
90
RPRI_COLD
VSEC_DC = 14V, IPRI_OUT_DC = 53.3A, TINTERNAL = –40°C
10
12
14
RPRI_AMB
VSEC_DC = 14V, IPRI_OUT_DC = 53.3A
12
16
20
RPRI_HOT
VSEC_DC = 14V, IPRI_OUT_DC = 53.3A, TINTERNAL = 100°C
16
19
22
SEC to PRI Output Resistance
Primary Output Voltage Ripple
VPRI_OUT_PP
CPRI_OUT_EXT = 0μF, IPRI_OUT_DC = 53.3A,
VSEC_DC = 14V, 20MHz BW
%
%
330
Rev 1.6
11/2017
mΩ
mV
615
TINTERNAL ≤ 100ºC
NBM™ Bus Converter
Page 7 of 26
W
VSEC_DC = 12 – 15.3V
VSEC_DC = 14V, IPRI_OUT_DC = 53.3A
SEC to PRI Efficiency (Ambient)
12.5
NBM6123x46C15A6yzz
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
300
µF
Protection SECONDARY to PRIMARY (Reverse Direction)
Excessive capacitance may drive module into short
circuit protection when starting from
Secondary to Primary
Effective Primary Output
Capacitance (External)
CPRI_OUT_EXT
Secondary Overvoltage
Lockout Threshold
VSEC_OVLO+
16
16.7
17.4
V
Secondary Overvoltage
Recovery Threshold
VPRI_OVLO–
15.3
16
16.7
V
Secondary Overvoltage
Lockout Response Time
tPRI_OVLO
Secondary Undervoltage
Lockout Threshold
VSEC_UVLO–
9.3
10
10.7
V
Secondary Undervoltage
Recovery Threshold
VPRI_UVLO+
10
10.7
11.4
V
Secondary Undervoltage
Lockout Response Time
tSEC_UVLO
30
100
Primary Output Overcurrent
Trip Threshold
IPRI_OUT_OCP
Powertrain is stopped but current can flow from
Secondary to Primary through MOSFET body diodes
Primary Output Overcurrent
Response Time Constant
tPRI_OUT_OCP
Effective internal RC filter
Primary Short Circuit Protection
Trip Threshold
IPRI_SCP
Primary Short Circuit Protection
Response Time
tPRI_SCP
NBM™ Bus Converter
Page 8 of 26
µs
Powertrain is stopped but current can flow from
Secondary to Primary through MOSFET body diodes
59
66.7
4
80
80
A
ms
A
1
Rev 1.6
11/2017
µs
µs
NBM6123x46C15A6yzz
200
180
Secondary
Output Current (A)
160
140
120
100
80
60
40
20
0
25
50
75
100
125
Case Temperature (°C)
Top only at temperature
Top and leads at
temperature
Leads at temperature
Top, leads, & belly at
temperature
3000
Secondary Output Current (A)
Secondary Output Power (W)
Figure 1 — Specified thermal operating area
2700
2400
2100
1800
1500
1200
900
600
300
0
36
37
38
39
40
41
42
43
44
45
46
200
180
160
140
120
100
80
60
40
20
0
36
37
38
Primary Input Voltage (V)
PSEC_OUT_DC
39
PSEC_OUT_PULSE
ISEC_OUT_DC
Secondary Output Capacitance
(% Rated CSEC_EXT_MAX)
Figure 2 — Specified electrical operating area using rated RSEC_HOT
110
100
90
80
70
60
50
40
30
20
10
0
0
20
40
60
80
Secondary Output Current (% ISEC_OUT_DC)
Figure 3 — Specified primary start up into load current and external capacitance
NBM™ Bus Converter
Page 9 of 26
40
41
42
43
44
Primary Input Voltage (V)
Rev 1.6
11/2017
100
ISEC_OUT_PULSE
45
46
NBM6123x46C15A6yzz
Signal Characteristics
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Temperature Monitor
• The TM pin is a standard analog I/O configured as an output from an internal µC.
• The TM pin monitors the internal temperature of the controller IC within an accuracy of ±5°C.
• µC 250kHz PWM output internally pulled high to 3.3V.
SIGNAL TYPE
STATE
Start Up
ATTRIBUTE
Powertrain Active
to TM Time
TM Duty Cycle
TM Current
SYMBOL
CONDITIONS / NOTES
MIN
TYP
MAX
100
tTM
18.18
TMPWM
ITM
UNIT
µs
68.18
%
4
mA
Recommended External filtering
DIGITAL
OUTPUT
Regular
Operation
TM Capacitance (External)
CTM_EXT
Recommended External filtering
0.01
µF
TM Resistance (External)
RTM_EXT
Recommended External filtering
1
kΩ
10
mV / °C
1.27
V
Specifications using recommended filter
TM Gain
TM Voltage Reference
TM Voltage Ripple
ATM
VTM_AMB
VTM_PP
Internal temperature = 27ºC
RTM_EXT = 1kΩ, CTM_EXT = 0.01µF,
VPRI_DC = 42V, ISEC_DC = 160A
28
TINTERNAL ≤ 100ºC
mV
40
Enable / Disable Control
• The EN pin is a standard analog I/O configured as an input to an internal µC.
• It is internally pulled high to 3.3V.
• When held low, the NBM internal bias will be disabled and the powertrain will be inactive.
• In an array of NBMs, EN pins should be interconnected to synchronize start up.
• Unit must not be disabled if a load is present on +VPRI while in reverse operation.
SIGNAL TYPE
STATE
Start Up
ANALOG
INPUT
ATTRIBUTE
EN to Powertrain
Active Time
EN Voltage Threshold
Regular
Operation
EN Resistance (Internal)
EN Disable Threshold
SYMBOL
tEN_START
CONDITIONS / NOTES
TYP
MAX
10
Internal pull up resistor
VEN_DISABLE_TH
NBM™ Bus Converter
Rev 1.6
Page 10 of 26 11/2017
UNIT
ms
2.3
VEN_TH
REN_INT
MIN
VPRI_DC > VPRI_UVLO+, EN held low both
conditions satisfied for T > tPRI_UVLO+_DELAY
V
1.5
kΩ
1
V
NBM6123x46C15A6yzz
Signal Characteristics (Cont.)
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Auxiliary Voltage Source
• The VAUX pin is a standard analog I/O configured as an output from an internal µC.
• VAUX is internally connected to µC output and internally pulled high to a 3.3V regulator with 2% tolerance, a 1% resistor of 1.5kΩ.
• VAUX can be used as a “Ready to process full power” flag. This pin transitions VAUX voltage after a 2ms delay from the start of powertrain activating,
signaling the end of softstart.
• VAUX can be used as “Fault flag”. This pin is pulled low internally when a fault protection is detected.
SIGNAL TYPE
ANALOG
OUTPUT
STATE
ATTRIBUTE
SYMBOL
Start Up
Powertrain active to VAUX
time
tVAUX
VAUX Voltage
VVAUX
VAUX Available Current
IVAUX
Regular
Operation
Fault
VAUX Voltage Ripple
VVAUX_PP
VAUX Capacitance
(External)
CVAUX_EXT
VAUX Resistance (External)
RVAUX_EXT
VAUX Fault Response Time
tVAUX_FR
CONDITIONS / NOTES
MIN
TYP
MAX
2
Powertrain active to VAUX High
2.8
ms
3.3
V
4
mA
50
100
TINTERNAL ≤ 100ºC
0.01
VPRI_DC < VµC_ACTIVE
From fault to VVAUX = 2.8V, CVAUX = 0pF
Signal Ground
• Signal ground is internally connect to PGND through a zero ohm resistor.
• Internal SGND traces are not designed to support high current.
NBM™ Bus Converter
Rev 1.6
Page 11 of 26 11/2017
1.5
UNIT
mV
µF
kΩ
10
µs
NBM™ Bus Converter
Rev 1.6
Page 12 of 26 11/2017
VAUX
TM
OUTPUT
OUTPUT
OUTPUT
EN
+VPRI
+VSEC
BIDIR
INPUT
VµC_ACTIVE
STARTUP
tVAUX
VPRI_UVLO-
VPRI_OVLO-
OVERVOLTAGE
tPRI_UVLO+_DELAY
VPRI_UVLO+
VPRI_OVLO+
VNOM
E
>
tPRI_UVLO+_DELAY
tAUTO-RESTART
tSEC_OUT_SCP
SHUTDOWN
E
AG
T
T
H
L
W G
EN
VO
LO HI
S
EV
T
D
D
T
RE
I
E
U FF
E
LL ULL
CU
NP N-O
UT
I
U
R
P
P
P
Y R
CI
IN
E
E
A R TU
C
BL ABL
RT
_D
M
I
A
O
I
R
VP
EN EN
PR
SH
RT
TA
ENABLE CONTROL
OVERCURRENT
AG
up
LT
ll O
u
N
O P
RV
N- AL
UT
VE
R
P
N
O
TU TER
UT
UT
E YO N
U T IN
Z
I
NP
P
R
L
I
O
X
N
A
I U
Y
IA D N
C
IT
R
AR
VA
_D
IN CON TU
RI &
M
I
P
V N
µc SE
PR
E
NBM6123x46C15A6yzz
NBM Forward Direction Timing Diagram
VAUX
TM
OUTPUT
OUTPUT
OUTPUT
EN
+VSEC
+VPRI
BIDIR
INPUT
NBM™ Bus Converter
Rev 1.6
Page 13 of 26 11/2017
tVAUX
STARTUP
VPRI = +VSEC – (~1.4V)
tPRI_UVLO+_DELAY
VSEC_UVLO+
VµC_ACTIVE
VSEC_UVLO-
VSEC_OVLO-
OVERVOLTAGE
VSEC_OVLO+
VNOM
>
tPRI_UVLO+_DELAY
GH
HI
NOT SUPPORTED CONDITION,
PERMANENT DAMAGE MAY OCCUR
OVERCURRENT
tAUTO-RESTART
W
tPRI_OUT_OCP
LO
SHUTDOWN
RED LINE: LOAD MUST NOT BE PRESENT
TO PREVENT DAMAGE TO UNIT
T
EN
T FF
/ EV
PU N-O
T
D
D
T
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AB NAB
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NBM6123x46C15A6yzz
NBM Reverse Direction Timing Diagram
NBM6123x46C15A6yzz
High Level Functional State Diagram
Conditions that cause state transitions are shown along arrows. Sub-sequence activities listed inside the state bubbles.
Application
of input voltage to VPRI_DC
VµC_ACTIVE < VPRI_DC < VPRI_UVLO+
STANDBY SEQUENCE
Application
of input voltage to VSEC_DC
VµC_ACTIVE <
VSEC_DC
K
< VPRI_UVLO+
VPRI_DC > VPRI_UVLO+
or VSEC_DC > VSEC_UVLO+
STARTUP SEQUENCE
TM Low
TM Low
EN High
EN High
VAUX Low
VAUX Low
Powertrain Stopped
Powertrain Stopped
ENABLE falling edge,
or OTP detected
Fault
Autorecovery
FAULT
SEQUENCE
TM Low
EN High
VAUX Low
tPRI_UVLO+_DELAY
expired
ONE TIME DELAY
INITIAL STARTUP
Input OVLO or UVLO,
Output OCP,
UTP, OVLO or UVLO, or
Input OCP detected
ENABLE falling edge,
or OTP detected
Input OVLO or UVLO,
Output OCP,
UTP, OVLO or UVLO, or
Input OCP detected
Powertrain Stopped
Short Circuit detected
SUSTAINED
OPERATION
TM PWM
EN High
VAUX High
Powertrain Active
Note: During reverse direction operation a load must not be present if the powertrain is in any stopped state while the supply voltage is present on +VSEC.
NBM™ Bus Converter
Rev 1.6
Page 14 of 26 11/2017
NBM6123x46C15A6yzz
Application Characteristics
PRI to SEC, Full Load Efficiency (%)
PRI to SEC, Power Dissipation (W)
Temperature controlled via top side cold plate, unless otherwise noted. All data presented in this section are collected from primary sourced units processing
power in forward direction.See associated figures for general trend data.
20
18
16
14
12
10
8
6
36
37
38
39
40
41
42
43
44
45
46
98.5
98.0
97.5
97.0
-40
-20
0
Primary Input Voltage (V)
TTOP SURFACE CASE:
-40°C
25°C
80°C
VPRI:
99
98
97
96
95
94
93
92
91
90
89
88
16
32
48
64
80
96
112
36V
42V
128
144
160
0
46V
48
64
80
PRI to SEC, Efficiency (%)
16
32
36V
Figure 8 — Efficiency at TCASE = 25°C
42V
46V
48
64
80
96
112
128
144
160
36V
42V
144
160
46V
96
112
128
144
160
88
80
72
64
56
48
40
32
24
16
8
0
0
16
32
Secondary Output Current (A)
VPRI :
100
Figure 7 — Power dissipation at TCASE = –40°C
PRI to SEC, Power Dissipation
32
36V
VPRI :
99
98
97
96
95
94
93
92
91
90
89
88
16
80
Secondary Output Current (A)
Figure 6 — Efficiency at TCASE = –40°C
0
60
88
80
72
64
56
48
40
32
24
16
8
0
Secondary Output Current (A)
VPRI :
40
Figure 5 — Full load efficiency vs. temperature; VPRI_DC
PRI to SEC, Power Dissipation
PRI to SEC, Efficiency (%)
Figure 4 — No load power dissipation vs. VPRI_DC
0
20
Case Temperature (ºC)
42V
48
64
80
96
112
128
Secondary Output Current (A)
46V
VPRI :
36V
42V
Figure 9 — Power dissipation at TCASE = 25°C
NBM™ Bus Converter
Rev 1.6
Page 15 of 26 11/2017
46V
99
98
97
96
95
94
93
92
91
90
89
88
0
16
32
48
64
80
96
112
128
144
PRI to SEC, Power Dissipation
PRI to SEC, Efficiency (%)
NBM6123x46C15A6yzz
160
88
80
72
64
56
48
40
32
24
16
8
0
0
16
Secondary Output Current (A)
36V
42V
VPRI:
PRI to SEC, Output Resistance (mΩ)
Figure 10 — Efficiency at TCASE = 80°C
1.5
1.0
0.5
-20
0
20
40
60
80
100
Case Temperature (°C)
ISEC_OUT:
64
80
96
112
128
144
160
36V
42V
144
160
46V
Figure 11 — Power dissipation at TCASE = 80°C
2.0
-40
48
Secondary Output Current (A)
46V
Secondary Output Voltage Ripple (mV)
VPRI:
32
120
100
80
60
40
20
0
0
16
32
48
64
80
96
112
128
Secondary Output Current (A)
VPRI:
160A
Figure 12 — RSEC vs. temperature; Nominal VPRI_DC
ISEC_DC = 160A at TCASE = 80°C
140
42V
Figure 13 — VSEC_OUT_PP vs. ISEC_DC ; No external CSEC_OUT_EXT.
Board mounted module, scope setting:
20MHz analog BW
NBM™ Bus Converter
Rev 1.6
Page 16 of 26 11/2017
NBM6123x46C15A6yzz
Figure 14 — Full load secondary voltage ripple, 270µF CPRI_IN_EXT;
No external CSEC_OUT_EXT. Board mounted module,
scope setting: 20MHz analog BW
Figure 15 — 0A – 160A transient response: CPRI_IN_EXT = 270µF,
no external CSEC_OUT_EXT
Figure 16 — 160A – 0A transient response:
CPRI_IN_EXT = 270µF, no external CSEC_OUT_EXT
Figure 17 — Start up from application of VPRI_DC = 42V,
20% ISEC_OUT_DC, 100% CSEC_OUT_EXT
Figure 18 — Start up from application of EN with pre-applied
VPRI_DC = 42V, 20% ISEC_OUT_DC, 100% CSEC_OUT_EXT
NBM™ Bus Converter
Rev 1.6
Page 17 of 26 11/2017
NBM6123x46C15A6yzz
General Characteristics
Specifications apply over all line and load conditions, unless otherwise noted; boldface specifications apply over the temperature range of
–40°C ≤ TINTERNAL ≤ 125°C (T-Grade); all other specifications are at TINTERNAL = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Mechanical
Length
L
60.87 [2.396]
61.00 [2.402]
61.13 [2.407]
mm [in]
Width
W
24.76 [0.975]
25.14 [0.990]
25.52 [1.005]
mm [in]
Height
H
7.11 [0.280]
7.21 [0.284]
7.31 [0.288]
mm [in]
Volume
Vol
Weight
W
Lead Finish
Without heatsink
cm3 [in3]
11.06 [0.675]
41 [1.45]
g [oz]
Nickel
0.51
2.03
Palladium
0.02
0.15
Gold
0.003
0.051
–40
125
µm
Thermal
Operating Temperature
TINTERNAL
NBM6123T46C15A6T0R (T-Grade)
Thermal Resistance Top Side
θINT-TOP
Estimated thermal resistance to maximum
temperature internal component from
isothermal top
1.36
°C/W
Estimated thermal resistance to
maximum temperature internal
component from isothermal leads
1.36
°C/W
Estimated thermal resistance to
maximum temperature internal
component from isothermal bottom
1.24
°C/W
34
Ws/°C
Thermal Resistance Leads
Thermal Resistance Bottom Side
θINT-LEADS
θINT-BOTTOM
Thermal Capacity
°C
Assembly
Storage Temperature
ESD Withstand
NBM6123T46C15A6T0R (T-Grade)
–40
ESDHBM
Human Body Model, “ESDA / JEDEC JDS-001-2012” Class I-C (1kV to
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