Data Sheet

VTM® Current Multiplier
VTM 48R P 015 x 050 A B 1
®
S
US
C
C
NRTL
US
Sine Amplitude Converter™ (SAC™)
Features
Product Ratings
• 38.4 Vdc to 1.2 Vdc 50 A current multiplier
VIN = 0 to 52 V
IOUT = 50 A (nom)
n Operating from standard 48 V or 24 V
PRM® regulators
VOUT = 0 to 1.63 V (no load)
K = 1/32
n Up to 52 Volts DC input
n K of 1/32 provides up to 50 A DC output current
• High efficiency (>93%) reduces system
power consumption
• High density (962 A/in3)
• Vicor’s 0623 ChiP package enables
low impedance interconnect to system board
• Provides enable / disable control,
internal temperature monitoring,
internal current monitoring
• ZVS / ZCS resonant Sine Amplitude
Converter topology
• Parallel up to 10 modules
Typical Applications
• Computing and Telecom Systems
n Optimized for Memory and High Power ASICs
• Automated Test Equipment
Product Description
The Vicor’s 0623 ChiP VTM current multiplier is a high
efficiency (>93%) Sine Amplitude Converter™ (SAC™)
operating from a 0 to 52 Vdc primary bus to deliver a 0 to
1.63 Vdc low voltage output. The Sine Amplitude Converter
offers a low AC impedance beyond the bandwidth of most
downstream regulators; therefore capacitance normally at the
load can be located at the input to the Sine Amplitude
Converter. Since the K factor of the VTM48RP015x050AB1 is
1/32, the capacitance value can be reduced by a factor of 1024,
resulting in savings of board area, materials and total system
cost.
The VTM48RP015x050AB1 is provided in Vicor’s 0623 ChiP
package compatible with standard pick-and-place assembly
processes. The co-molded ChiP package provides enhanced
thermal management due to a large thermal interface area and
superior thermal conductivity. The high conversion efficiency
of the VTM48RP015x050AB1 increases overall system efficiency
and lowers operating costs compared to conventional
approaches.
The VTM48RP015x050AB1 enables the utilization of Factorized
Power Architecture™ which provides efficiency and size
benefits by lowering conversion and distribution losses and
promoting high density point of load conversion.
• High Density Power Supplies
• Communications Systems
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 1 of 24
10/2014
800 927.9474
VTM 48R P 015 x 050 A B 1
Typical Application
LEXT
5V
VIN
38 V – 60 V
VCC
PI3755
ENABLE
VOUT
VTM
EAO VDIFF
Application
TM
FLT
10K
ENABLE
IMON
SYSTEM ENABLE
VR12.x
EA
Controller
Typical Application: Diagram for use within a Factorized Power, VR12.x Memory Design
Part Ordering Information
Device
Input Voltage
Range
Package Type
Output
Voltage
Temperature Grade
Output
Current
Revision
Package
Size
Version
VTM
48R
P
015
x
050
A
B
1
VTM = VTM
48R = 0 to 52 V
P = Through hole, 18 pin
015 = 1.5 V
T = -40 to 125°C
050 = 50 A
A
B = 0623
1
All products shipped in JEDEC standard high profile (0.400” thick) trays (JEDEC Publication 95, Design Guide 4.10).
Standard Models
Part Number
VIN
Package Type
VOUT
Temperature
Current
Package
Size
Version
VTM48RP015T050AB1
0 to 52 V
Through hole, 18 pin
1.5 V
(0 to 1.63 V)
-40 to 125°C
50 A
0623
1
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 2 of 24
10/2014
800 927.9474
VTM 48R P 015 x 050 A B 1
Pin Configuration
TOP VIEW
1
2
+OUT
A
A +OUT
-OUT
B
B -OUT
+OUT
C
C +OUT
-OUT
D
D -OUT
+OUT
E
E +OUT
-OUT
F
F
EN_BUS
G
G TM
VCC
H
H CM
+IN
I
I
-OUT
-IN
0623 device
Pin Numbering and Descriptions
Pin
Number
Signal Name
Type
A1, A2
C1, C2
E1, E2
+OUT
OUTPUT
POWER
Positive output terminal
B1, B2
D1, D2
F1, F2
-OUT
OUTPUT
POWER
RETURN
Negative output terminal
G1
EN_BUS
INPUT
G2
TM
OUTPUT
H1
VCC
INPUT
H2
CM
OUTPUT
Current monitor
I1
+IN
INPUT
POWER
Positive input terminal
I2
-IN
INPUT
POWER
RETURN
Negative input terminal
Function
ENABLE, DISABLE and VTM Ready
Temperature monitor and Power Good Flag
Power train controller supply
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 3 of 24
10/2014
800 927.9474
VTM 48R P 015 x 050 A B 1
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.
Min
Max
Unit
+IN to –IN
Parameter
-1.0
60
VDC
EN_BUS to –IN
-0.3
5.5
VDC
TM to –IN
-0.3
5.5
VDC
VCC to –IN
-0.3
5.5
VDC
CM to –IN
0
5.5
VDC
N/A
VDC
0.2
VDC
4
VDC
+ IN / –IN to + OUT / –OUT (hipot)
Comments
Non-isolated VTM
+ IN / –IN to + OUT / –OUT (working)
+ OUT to –OUT
-1.0
Electrical Specifications
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of
-40°C ≤ TINT ≤ 125°C (T-Grade); All other specifications are at TINT = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
52
Vdc
1000
V/ms
N/A
V
Powertrain
Input voltage range
VIN
VCC applied
VIN slew rate
dVIN/dt
VIN UV turn off
VIN_UV
Total No Load power dissipation
PNL
0
This protection is disabled for this product
N/A
VIN = 38.4 V
2.3
VIN = 0 V to 52 V
5.3
VIN = 38.4 V, TC = 25ºC
1.1
VIN = 0 V to 52 V, TC = 25ºC
W
1.5
3.5
VCC enable, VIN = 38.4 V, COUT = 27000 µF,
Inrush current peak
IINRP
RLOAD = 22.22 mΩ (See start up operation VCC
DC input current
IIN_DC
N/A
N/A
A
1.70
A
applied after input voltage)
Transfer ratio
Output voltage
K
Steady state
K = VOUT/VIN, IOUT = 0 A
VOUT
1/32
VOUT = VIN • K - IOUT • ROUT, IOUT = 0 A
0
V/V
1.63
V
Output current (average)
IOUT_AVG
Steady state (See safe operating area)
50
A
Output current (peak)
IOUT_PK
TPEAK ≤ 2 ms, IOUT_AVG < 50 A, transient, duty cycle = 25%
100
A
78
W
Output power (average)
Efficiency (ambient)
POUT_AVG
hAMB
IOUT_AVG ≤ 50 A
VIN = 38.4 V, IOUT = 50 A
89.4
VIN = 26 V to 52 V, IOUT = 50 A
85.7
VIN = 38.4 V, IOUT = 25 A
91.6
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 4 of 24
10/2014
800 927.9474
90.4
%
92.7
VTM 48R P 015 x 050 A B 1
Electrical Specifications (Cont.)
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of
-40°C ≤ TINT ≤ 125°C (T-Grade); All other specifications are at TINT = 25ºC unless otherwise noted.
Attribute
Efficiency (hot)
Efficiency (over load range)
Symbol
Conditions / Notes
hHOT
Powertrain (Cont.)
VIN = 38.4 V, TC = 100°C, IOUT = 50 A
h20%
10 A < IOUT < 50 A
Output resistance (cold)
ROUT_COLD
TC = -40°C, IOUT = 50 A
Output resistance (ambient)
ROUT_AMB
Output resistance (hot)
ROUT_HOT
Switching frequency
Min
Typ
88.3
89.6
Max
Unit
%
82
%
1.20
1.38
1.57
mΩ
TC = 25°C, IOUT = 50 A
1.55
1.78
2.00
mΩ
TC = 100°C, IOUT = 50 A
1.82
2.03
2.25
mΩ
FSW
1.30
1.37
1.44
MHz
Output ripple frequency
FSW_RP
2.60
2.74
2.88
MHz
Output voltage ripple
VOUT_PP
10
20
mV
Output inductance (parasitic)
LOUT_PAR
Output capacitance (internal)
COUT_INT
Output capacitance (external)
COUT
Overvoltage lockout
Overvoltage lockout
response time constant
VIN_OVLO+
TOVLO
COUT = 3000 µF, IOUT = 50 A, VIN = 38.4 V,
20 MHz BW
Frequency up to 30 MHz,
270
Effective Value at 1.2 VOUT
Protection
This protection is disabled for this product
200
N/A
Effective internal RC filter
IOCP
This protection is disabled for this product
N/A
Short circuit protection trip current
ISCP
VTM latches after fault
260
TOCP
Effective internal RC filter (Integrative).
response time constant
Short circuit protection response time
Thermal shutdown setpoint
Reverse inrush current protection
TSCP
N/A
µF
27000
µF
N/A
V
N/A
Output overcurrent trip
Output overcurrent
pH
Simulated leads model
From detection to cessation
N/A
µs
N/A
A
A
N/A
ms
1
µs
of switching (Instantaneous)
TINT_OTP
125
Reverse Inrush protection is enabled for this product
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 5 of 24
10/2014
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130
135
ºC
VTM 48R P 015 x 050 A B 1
Output Current vs. Temperature
60
50 A continuous Output Current
Output Current (A)
50
40
30
20
10
0
25
35
45
55
65
75
85
95
105
115
125
Temperature (°C)
Top only at temperature
Top, leads & bottom at temperature
Top & leads at temperature
Leads only at temperature
Figure 1 — Safe thermal operating area
Output Current vs. Input Voltage
Output Power vs. Input Voltage
120
160
< 2 ms, 100 A Maximum Peak Current Region
100
Output Current (A)
Output Power (W)
140
120
100
80
60
40
20
80
65 A Maximum Average Current Region, case temperature < 85 °C
60
50 A Maximum Average Current Region, case temperature < 100 °C
40
20
0
0
0
5
10
15
20
25
30
35
40
45
50
55
0
60
5
10
15
Input Voltage (V)
P (ave), 52 V, 50 A
P (ave), t < 2 ms
P (ave), 52 V, 50 A
P (ave), 52 V, 65 A
Figure 2 — Safe electrical operating area
Safe Electrical Operating Area
120
Output Current (A)
< 2 ms, 100A Peak Current Region
100
80
65 A Average Current Region, case temperature < 85 °C
60
Limited by ROUT
50 A Average Current Region, case temperature <100 °C
40
20
0
0.0
20
25
30
35
40
45
50
55
Input Voltage (V)
0.2
0.4
0.6
P (ave), 52 V, 50 A
0.8
1.0
1.2
Output Voltage (V)
P (ave), t < 2 ms
1.4
1.6
1.8
P (ave), 52 V, 65 A
Figure 3 — Safe electrical operating area
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 6 of 24
10/2014
800 927.9474
P (ave), t < 2 ms
P (ave), 52 V, 65 A
VTM 48R P 015 x 050 A B 1
Signal Characteristics
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of
-40°C ≤ TINT ≤ 125°C (T-Grade); All other specifications are at TINT = 25ºC unless otherwise noted.
VTM VCC Supply: VCC
• PRM® can be used as valid wake-up signal source.
• VCC voltage must be continuously applied with the limit specified.
• Used to wake up powertrain circuit.
• A minimum of 4.85 V must be applied indefinitely for entire
input voltage range to ensure normal operation.
SIGNAL TYPE
STATE
ATTRIBUTE
External VCC voltage
SYMBOL
VVCC_EXT
Steady
ANALOG
INPUT
Start Up
VCC current draw
IVCC
VCC inrush current
IINR_VCC
VCC to TM turn-on delay
Transitional
VCC to EN_BUS delay
Internal VCC capacitance
TON
TVCC_EN_BUS
CVCC_INT
CONDITIONS / NOTES
Required for start up, and steady state
operation.
MIN
TYP
4.85
VCC = 4.85 V, Vin = 0 V
73
Fault mode. VCC > 4.85 V
25
VCC = 5.35 V, dVCC/dt = 1000 V/ms
MAX
UNIT
5.35
V
80
mA
2
A
28
34
ms
VCC = 4.85 V to EN_BUS high, VIN = 0 V,
dVCC/dt = 1000 V/ms
28
34
ms
VCC = 0 V
2
VIN = 0 V, EN_BUS floating,
VCC applied, CEN_BUS = 0 µF
23
µF
ENABLE_BUS: EN_BUS
• The EN_BUS pin disables the VTM module.
When held below 1 V, the VTM module will be disabled.
• Module will shutdown when pulled low with an impedance
less than 25 kΩ.
• EN_BUS pin outputs 4.7 V minimum during normal operation.
EN_BUS pin is equal to 0 V minimum during fault mode given
VCC > 4.85 V and floating EN_BUS pin.
SIGNAL TYPE
STATE
ANALOG
OUTPUT
Steady
Start Up
Enable
DIGITAL
INPUT/
OUTPUT
Disable
Transitional
ATTRIBUTE
EN_BUS voltage
SYMBOL
CONDITIONS / NOTES
VEN_BUS
MIN
4.7
TYP
MAX
5
5.3
UNIT
V
EN_BUS source current
IEN_BUS_OP
50
µA
EN_BUS source current
IEN_BUS_EN
50
µA
EN_BUS voltage
VEN_BUS_EN
EN_BUS voltage (disable)
VEN_BUS_DIS
3
EN_BUS resistance
(external)
REN_BUS_EXT
Connected to -IN. Min value to guarantee
startup (open circuit OK), EN_BUS >4 V
EN_BUS sink capability
IEN_BUS_SINK
Fault State
EN_BUS disable time
TEN_BUS_DIS_T
EN_BUS pulled low to switching stops
1.2
µs
Internal EN_BUS
Capacitance
CEN_BUS_INT
EN_BUS = 0 V
100
pF
1
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 7 of 24
10/2014
800 927.9474
2
1600
4
V
V
kΩ
1
mA
VTM 48R P 015 x 050 A B 1
Signal Characteristics (Cont.)
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of
-40°C ≤ TINT ≤ 125°C (T-Grade); All other specifications are at TINT = 25ºC unless otherwise noted.
Current Monitor: CM
• The CM pin voltage varies between 0 V and 3.05 V representing the
output current within ±20% under all operating line temperature
conditions between 0% and 100% load.
SIGNAL TYPE
STATE
ATTRIBUTE
CM Voltage (No Load)
ANALOG
OUTPUT
CM Voltage (50%)
Steady
CM Voltage (Full Load)
CM Gain
the output current of the VTM module.
SYMBOL
CONDITIONS / NOTES
MIN
TYP
MAX
UNIT
0
0.3
0.5
V
VCM_NL
TINT = 25ºC, VIN = 38.4 V, IOUT = 0 A
VCM_50%
TINT = 25ºC, VIN = 38.4 V, IOUT = 25 A
1.68
VCM_FL
TINT = 25ºC, VIN = 38.4 V, IOUT = 50 A
3.05
V
55
mV/A
ACM
CM Resistance (External)
• The CM pin provides a DC analog voltage proportional to
TINT = 25ºC, VIN = 38.4 V, 0% ≤ IOUT ≤ 100%
RCM_EXT
V
2.5
MΩ
Temperature Monitor: TM
• The TM pin monitors the internal temperature of the VTM controller IC
within an accuracy of ±5 °C.
• Can be used as a "Power Good" flag to verify that
the VTM module is operating.
SIGNAL TYPE
STATE
ATTRIBUTE
TM voltage
ANALOG
OUTPUT
DIGITAL
OUTPUT
(FAULT FLAG)
Steady
Steady
Transitional
• The TM pin has a room temperature setpoint of 3 V
and approximate gain of 10 mV/K.
• Output drives Temperature Shutdown comparator
SYMBOL
VTM_AMB
TM source current
ITM
TM gain
ATM
CONDITIONS / NOTES
MIN
TYP
MAX
UNIT
TINT controller = 27°C, ITM <100 µA
2.85
3
3.15
V
100
10
TM voltage ripple
VTM_PP
CTM = 0 F, VIN = 38.4 V, IOUT = 50 A
150
TM disable voltage
VTM_DIS
PGOOD deasserted
0.2
TM Enable Source Current
ITM_EN
TM Fault Sink Current
ITM_FAULT
TM capacitance (external)
CTM_EXT
TM fault response time
TFR_TM
TM > 1 V
20
TM ≤ 0.1 V, Fault state
1
350
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 8 of 24
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800 927.9474
mV
V
mA
mA
100
From fault detection to TM driven low
µA
mV/K
0.02
pF
µs
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 9 of 24
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Output
Voltage
Input
Voltage
TM
TINT_OTP
CM
VEN_EN_BUS
EN_BUS VEN_BUS_EN
VVCC_EXT
VCC UV
TON
C
VC
A
PP
ED
LI
V IN
A
L
PP
D
IE
EN
U
_B
EN
S
_B
U
LL
PU
S
R
ED
YC
D
EC
SE
R
EA
V IN
EL
W
LO
LE
LT N
O
YC
U IO
C
M
A
T
E
I
E
F D
R
R
IN
IN
TM ON
V
V
C
LE
D
VE
VC
C
R
VEN_BUS_DIS
EM
D
VE
O
VTM 48R P 015 x 050 A B 1
Timing Diagram
VTM 48R P 015 x 050 A B 1
Application Characteristics
The following values, typical of an application environment, are collected at TC = 25 ºC unless otherwise noted. See associated figures for general trend data.
ATTRIBUTE
SYMBOL
Total No load power dissipation
CONDITIONS / NOTES
PNL
TYP
UNIT
VIN = 38.4 V, VTM enabled
0.9
W
Efficiency (ambient)
hAMB
VIN = 38.4 V, IOUT = 50 A
90.7
%
Efficiency (hot)
hHOT
VIN = 38.4 V, IOUT = 50 A, TC = 100ºC
89.5
%
Output resistance (cold)
ROUT_COLD
VIN = 38.4 V, IOUT = 50 A, TC = -40ºC
1.47
mΩ
Output resistance (ambient)
ROUT_AMB
VIN = 38.4 V, IOUT = 50 A
1.75
mΩ
Output resistance (hot)
ROUT_HOT
VIN = 38.4 V, IOUT = 50 A, TC = 100ºC
2.05
mΩ
Output voltage ripple
VOUT_PP
COUT = 0 F, IOUT = 50 A, VIN = 38.4 V, 20 MHz BW
90
mV
VOUT transient (positive)
VOUT_TRAN+
IOUT_STEP = 0 A to 50 A, VIN = 38.4 V, ISLEW = 17 A/µs
24
mV
VOUT transient (negative)
VOUT_TRAN-
IOUT_STEP = 50 A to 0 A, VIN = 38.4 V, ISLEW = 45 A/µs
24
mV
Total No Load Power Dissipation
vs. Input Voltage
Full Load Efficiency vs. TCASE
93
Full Load Efficiency (%)
3
2
1
89
85
81
77
73
0
25
30
35
40
45
50
-40
55
-20
0
TCASE:
-40°C
25°C
VIN:
100°C
14
86
12
82
10
78
8
74
6
PD
4
Efficiency (%)
90
12
85
10
82
8
79
6
35
40
45
PD
76
70
30
50
26 V
38.4 V
52 V
26 V
4
2
0
0
5
10
15
Load Current (A)
VIN:
52 V
14
0
25
38.4 V
88
62
20
26 V
16
73
15
100
91
2
10
80
94
66
5
60
Efficiency & Power Dissipation 25°C Case
16
Power Dissipation (W)
Efficiency (%)
Efficiency & Power Dissipation -40°C Case
94
0
40
Figure 5 — Full load efficiency vs. temperature
Figure 4 — No load power dissipation vs. VIN
70
20
Case Temperature (°C)
Input Voltage (V)
Power Dissipation (W)
Total No Load
Power Dissipation (W)
4
20
25
30
35
40
45
50
Load Current (A)
38.4 V
Figure 6 — Efficiency and power dissipation at –40°C
52 V
VIN:
26 V
38.4 V
52 V
26 V
38.4 V
Figure 7 — Efficiency and power dissipation at 25°C
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 10 of 24
10/2014
800 927.9474
52 V
VTM 48R P 015 x 050 A B 1
Application Characteristics (Cont.)
The following values, typical of an application environment, are collected at TC = 25 ºC unless otherwise noted. See associated figures for general trend data.
ROUT vs. TCASE at VIN = 38.4 V
16
91
14
88
12
85
10
82
8
6
79
PD
76
4
2.2
ROUT (mΩ)
94
2.4
Power Dissipation (W)
Efficiency (%)
Efficiency & Power Dissipation 100°C Case
2.0
1.8
1.6
73
2
1.4
70
0
1.2
0
5
10
15
20
25
30
35
40
45
50
-40
Load Current (A)
VIN:
26 V
52 V
38.4 V
26 V
38.4 V
-20
0
20
40
60
80
100
Case Temperature (°C)
52 V
IOUT:
50 A
Figure 9 — ROUT vs. temperature
Figure 8 — Efficiency and power dissipation at 100°C
Output Voltage Ripple vs. Load
120
VRIPPLE (mVPK-PK)
100
80
60
40
20
0
0
5
10
15
20
25
30
35
40
45
50
Load Current (A)
VIN:
26 V
38.4 V
52 V
Figure 10 — VRIPPLE vs. IOUT ; No external COUT. Board mounted
module, scope setting: 20 MHz analog BW
Figure 11 — Full load ripple, 100 µF CIN; No external COUT. Board
mounted module, scope setting : 20 MHz analog BW
Figure 12 — Start up from application of VIN ;
VCC pre-applied COUT = 10000 µF
Figure 13 — Start up from application of VCC;
VIN = 0 V
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 11 of 24
10/2014
800 927.9474
VTM 48R P 015 x 050 A B 1
Application Characteristics (Cont.)
The following values, typical of an application environment, are collected at TC = 25 ºC unless otherwise noted. See associated figures for general trend data.
Figure 15 — 50 A – 0 A transient response:
C IN = 100 µF, no external COUT
Figure 14 — 0 A – 50 A transient response:
C IN = 100 µF, no external COUT
CM Voltage vs. Load at 25°C Case
3.5
3.0
3.0
2.5
2.5
CM (V)
CM (V)
CM Voltage vs. Load at VIN = 38.4 V
3.5
2.0
1.5
2.0
1.5
1.0
1.0
0.5
0.5
0.0
0.0
0
5
10
15
20
25
30
35
40
45
50
0
5
10
TCASE:
-40°C
25°C
VIN:
100°C
Figure 16 — CM voltage vs. load
CM Voltage at 50 A Load vs. TCASE
3.0
CM (V)
2.5
2.0
1.5
1.0
0.5
0.0
-20
0
20
40
60
80
100
TCASE (°C)
VIN:
26 V
20
26 V
Figure 17 — CM voltage vs. load
3.5
-40
15
38.4 V
25
30
35
40
Load Current (A)
Load Current (A)
52 V
Figure 18 — Full load CM voltage vs. TCASE
VTM® Current Multiplier
Rev 1.1
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38.4 V
52 V
45
50
VTM 48R P 015 x 050 A B 1
General Characteristics
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of
-40°C ≤ TINT ≤ 125°C (T-Grade); All other specifications are at TINT = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Mechanical
Length
L
22.37 / [0.881] 22.50 / [0.886] 22.63 / [0.891]
mm/[in]
Width
W
8.03 / [0.316]
8.41 / [0.331] 8.79 / [0.346]
mm/[in]
Height
H
4.45 / [0.175]
4.50 / [0.177] 4.55 / [0.179]
mm/[in]
Volume
Vol
0.85 / [0.052]
cm3/[in3]
Weight
W
3.1 / [0.109]
g/[oz]
No heat sink
Lead finish
Nickel
0.51
2.03
Palladium
0.02
0.15
Gold
0.003
0.051
-40
125
µm
Thermal
Operating temperature
Thermal resistance to top side
TINT
T-Grade
fINT-TOP
°C
Estimated thermal resistance to
maximum temperature internal
component from isothermal top
5.9
°C/W
Thermal resistance leads
fINT-LEADS
Estimated thermal resistance to
maximum temperature internal
component from isothermal leads
2.4
°C/W
Thermal resistance bottom side
fINT-BELLY
Estimated thermal resistance to
maximum temperature internal
component from isothermal bottom
5.5
°C/W
2.15
Ws/°C
Thermal capacity
Assembly
Peak compressive force
applied to case (Z-axis)
Storage temperature
Supported by leads only
TST
T-Grade
-40
ESDHBM
Human Body Model,
"JEDEC JESD 22-A114C.01"
2000
ESDCDM
Charge Device Model,
"JEDEC JESD 22-C101-C"
500
ESD withstand
5
lbs
17.05
lbs/in2
125
°C
Vdc
VTM® Current Multiplier
Rev 1.1
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VTM 48R P 015 x 050 A B 1
General Characteristics (Cont.)
Specifications apply over all line and load conditions unless otherwise noted; Boldface specifications apply over the temperature range of
-40°C ≤ TINT ≤ 125°C (T-Grade); All other specifications are at TINT = 25ºC unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
Reliability
MTBF
MIL-HDBK-217 Plus Parts Count;
25ºC Ground Benign, Stationary,
Indoors / Computer Profile
6.74
MHrs
Telcordia Issue 2 - Method I Case III;
Ground Benign, Controlled
15.6
MHrs
N/A
µF
0
Ω
Safety
Isolation voltage (hipot)
VHIPOT
Non isolated VTM
Isolation capacitance
CIN_OUT
Unpowered unit
Isolation resistance
RIN_OUT
N/A
Agency Approvals
UL 60950-1, CAN/CSA C22.2 No. 60950-1, EN 60950-1, IEC 60950-1
Agency approvals / standards
CE Marked for Low Voltage Directive and RoHS Recast Directive, as applicable
Using the Control Signals VCC, EN_BUS, TM, CM
VCC: The VTM VCC Supply
This pin is an input pin which powers the internal VCC circuit within
the specified voltage range of 4.85 V to 5.35 V. This voltage is required
for VTM current multiplier start up and must be applied for entire
input voltage range.
Some additional notes on the using the VCC pin:
n The VCC voltage must be applied indefinitely allowing for
continuous operation for entire input voltage range of VTM.
n The fault response of the VTM module is latching.
Recycle of input voltage in presence of VCC is required in order to
restart the unit, provided the EN_BUS pin is floating.
n VTMs array fault shutdown: In an array, the EN_BUS pin of VTMs
should be tied together. In the case of a fault on one of the VTMs, the
EN_BUS pin of VTM under fault can pull the common EN_BUS
signal low and shut the VTM array off.
n VTMs array start-up: In an array, EN_BUS signal can be used as a
Power Good/Ready signal to apply the input voltage to the VTM. The
EN_BUS signal should be above maximum enable threshold voltage
to ensure all VTMs in the array are ready.
TM: Temperature Monitor
This pin provides a voltage proportional to the absolute temperature
of the converter control IC.
It can be used to accomplish the following functions:
n Monitor the control IC temperature: The temperature in
EN_BUS: ENABLE_BUS
This pin can be used to accomplish the following functions:
n VTM output disable: EN_BUS pin can be actively pulled down in
order to disable the module. The pull down resistance shall be lower
than 25 kΩ. The EN voltage should be lower than minimum EN
disable threshold as specified in signal characteristics in order to
keep the VTM off.
n VTM start-up: VTM will start up after EN_BUS signal crosses its
maximum under voltage threshold point. In order to guarantee VTM
start-up, resistance applied from EN_BUS pin to ground must exceed
the minimum external resistance as specified in
signal characteristics.
n VTM start-up after EN_BUS pulled low: Disabling the VTM by
pulling the EN_BUS pin of the VTM low is latching. Recycling the
input voltage in presence of VCC is required in order to restart the
VTM, provided the EN_BUS pin is floating.
Kelvin is equal to the voltage on the TM pin scaled
by 100. (i.e. 3.0 V = 300 K = 27ºC). If a heat sink is applied,
TM can be used to thermally protect the system.
n Fault detection flag: The TM voltage source is internally
turned off as soon as a fault is detected. For system
monitoring purposes (microcontroller interface) faults are
detected on falling edges of TM signal.
n VTMs array start-up: In an array, TM signal can be used as a Power
Good/Ready signal to apply the input voltage to the VTM. The TM
signal of all VTMs should high to ensure all VTMs in the array
are ready.
CM: Current Monitor
This pin provides a voltage proportional to the output current of the
VTM module. The nominal voltage will vary between
0.3 V and 3.05 V over the output current range of the VTM module (See
Figures 16 - 18). The accuracy of the CM pin will be within (±20%)
under all line and temperature conditions between 0% and 100% load.
VTM® Current Multiplier
Rev 1.1
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VTM 48R P 015 x 050 A B 1
Start Up Behavior
TON
VEN_BUS_EN
TON
A
C
VC
Figure 19 — VCC applied after Input Voltage
VTM® Current Multiplier
Rev 1.1
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Page 15 of 24
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Output
Voltage
Input
Voltage
TM
TINT_OTP
CM
VEN_BUS
EN_BUS
VVCC_EXT
VCC UV
V IN
not recommended to start up the VTM in this order): In this case the
VTM module output will begin to rise upon the application of the
VCC voltage. However, the adaptive soft start circuit is disabled
internal to the VTM and the start-up current will be unlimited. The
TM and output voltage signal appear after a TON time with respect to
the VCC under-voltage point. The EN_BUS signal crosses its enable
threshold voltage at TON time. In this mode of start-up, input voltage
is applied prior to VCC, so input capacitance is already charged prior
to application of VCC. When VCC applied, the VTM powertrain
generates the output voltage and charges the output capacitance. In
this mode of operation the inrush is due to the output capacitance.
The following diagram shows the power up sequence for such mode
of operation. This product requires an external soft start circuit to
limit the inrush current in this mode of operation. This product does
not support the auto-restart feature in fault conditions.
ED
LI
n Stand-alone operation (VCC applied after Input voltage. It is
PP
In this case the controller is active prior to ramping the input
voltage. In this mode of operation, TM signal appearance is delayed
by the TON time from VCC under-voltage point. TM signal appears
after EN_BUS signal crosses its enable threshold voltage. It is
recommended to apply the input voltage after TM signal
appearance. When the input voltage is applied, the VTM module
output voltage will track the input (See Figure 12). The inrush
current is determined by the input voltage rate of rise, input and
output capacitance. If the VCC voltage is removed prior to the input
reaching 0 V, the VTM will shut down. This mode of operation is
recommended when this VTM operates with upstream regulator
such as PRM. Timing diagram shows the power up sequence for
such mode of operation.
ED
LI
PP
A
n Normal operation (VCC applied prior to Input voltage):
D
VE
ED
O
LI
LT EM
U R
PP
A
A
F C
C
C
TM V
VC
Depending on the sequencing of the VCC with respect to the input
voltage, the behavior during start-up will vary as follows:
VTM® Current Multiplier
Rev 1.1
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CM
TM
EN_BUS
VCC
-IN
+IN
Input Over
Voltage
Protection
+VIN
Current
Monitor
Input Under
Voltage
Protection
Over
Temperature
Protection
Temperature
Monitor
+VIN
CEN_BUS_INT
Bias Voltage
EN_BUS
Enable,
Startup
and
Fault Logic
Soft-Start Logic
Modulator (Gate Drive
Timing)
Primary Gate Drivers
C2
C1
Cr
Primary Side:
Half Bridge
-IN
Power
Transformer
Slow Current Limit
(Output Current
Limit)
Fast Current Limit
(Short-Circuit Current
Limit)
-IN
Enable
Secondary
Gate Drivers
Differential
Current Sensing
Q2
Q1
Reverse Current
Protection
Secondary Gate
Drivers and gate
drive level
-OUT
Q6
Q5
Secondary
Side: Center
Tap with
Synchronous
Rectification
COUT
-OUT
+OUT
VTM 48R P 015 x 050 A B 1
VTM Module Block Diagram
VTM 48R P 015 x 050 A B 1
Sine Amplitude Converter™ Point of Load Conversion
976 pH
IOUT
IOUT
LIN = 0.27 nH
OUT
RROUT
+
1.78 mΩ
R
RCIN
CIN
18 mΩ
VININ
V
LOUT = 270 pH
CCININ
V•I
1/32 • IOUT
+
+
0.125 µF
IIQQ
26 mA
–
RRCOUT
COUT
1Ω
+
100 µΩ
1/32 • VIN
COUT
COUT
200 µF
VOUT
V
OUT
–
K
–
–
Figure 20 — VI Chip® product AC model
The Sine Amplitude Converter (SAC™) uses a high frequency resonant
tank to move energy from input to output. (The resonant tank is
formed by Cr and leakage inductance Lr in the power transformer
windings as shown in the VTM Module Block Diagram). The resonant
LC tank, operated at high frequency, is amplitude modulated as a
function of input voltage and output current. A small amount of
capacitance embedded in the input and output stages of the module is
sufficient for full functionality and is key to achieving power density.
The VTM48RP015x050AB1 SAC can be simplified into the following
model:
The use of DC voltage transformation provides additional interesting
attributes. Assuming that ROUT = 0 Ω and IQ = 0 A, Eq. (3) now becomes
Eq. (1) and is essentially load independent, resistor R is now placed in
series with VIN as shown in Figure 21.
R
R
VIN
Vin
+
–
SAC™
SAC
K=
= 1/32
1/32
K
VOUT
Vout
At no load:
VOUT = VIN • K
(1)
Figure 21 — K = 1/32 Sine Amplitude Converter
with series input resistor
K represents the “turns ratio” of the SAC.
Rearranging Eq (1):
K=
The relationship between VIN and VOUT becomes:
VOUT
VIN
(2)
VOUT = (VIN – IIN • RIN) • K
In the presence of load, VOUT is represented by:
Substituting the simplified version of Eq. (4)
(IQ is assumed = 0 A) into Eq. (5) yields:
VOUT = VIN • K – IOUT • ROUT
(3)
VOUT = VIN • K – IOUT • RIN • K2
and IOUT is represented by:
IOUT =
(5)
IIN – IQ
K
(4)
ROUT represents the impedance of the SAC, and is a function of the
RDSON of the input and output MOSFETs and the winding resistance of
the power transformer. IQ represents the quiescent current of the SAC
control and gate drive circuitry.
VTM® Current Multiplier
Rev 1.1
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(6)
VTM 48R P 015 x 050 A B 1
This is similar in form to Eq. (3), where ROUT is used to represent the
characteristic impedance of the SAC™. However, in this case a real R on
the input side of the SAC is effectively scaled by K2 with respect to the
output.
Assuming that R = 1 Ω, the effective R as seen from the secondary side
is 0.98 mΩ, with K = 1/32 as shown in Figure 21.
A similar exercise should be performed with the addition of a capacitor
or shunt impedance at the input to the SAC.
A switch in series with Vin is added to the circuit. This is depicted in
Figure 22.
A solution for keeping the impedance of the SAC low involves
switching at a high frequency. This enables small magnetic components
because magnetizing currents remain low. Small magnetics mean small
path lengths for turns. Use of low loss core material at high frequencies
also reduces core losses.
S
VVin
IN
+
–
Low impedance is a key requirement for powering a high-current, low
voltage load efficiently. A switching regulation stage should have
minimal impedance while simultaneously providing appropriate
filtering for any switched current. The use of a SAC between the
regulation stage and the point of load provides a dual benefit of scaling
down series impedance leading back to the source and scaling up shunt
capacitance or energy storage as a function of its K factor squared.
However, the benefits are not useful if the series impedance of the SAC
is too high. The impedance of the SAC must be low, i.e. well beyond the
crossover frequency of the system.
C
SAC™
SAC
K = 1/32
K = 1/32
VVout
OUT
Figure 22 — Sine Amplitude Converter™ with input capacitor
The two main terms of power loss in the VTM module are:
- No load power dissipation (PNL): defined as the power
used to power up the module with an enabled powertrain
at no load. It includes the components due to input voltage and
VCC voltage.
- Resistive loss (ROUT): refers to the power loss across
the VTM module modeled as pure resistive impedance.
PDISSIPATED = PNL + PROUT
A change in VIN with the switch closed would result in a change in
capacitor current according to the following equation:
IC(t) = C
dVIN
dt
Therefore,
(7)
Assume that with the capacitor charged to VIN, the switch is opened
and the capacitor is discharged through the idealized SAC. In this case,
IC= IOUT • K
(10)
POUT = PIN – PDISSIPATED = PIN – PNL – PROUT
The above relations can be combined to calculate the overall module
efficiency:
(8)
h =
(9)
=
POUT = PIN – PNL – PROUT
PIN
PIN
Substituting Eq. (1) and (8) into Eq. (7) reveals:
IOUT =
C • dVOUT
K2
dt
The equation in terms of the output has yielded a K2 scaling factor for
C, specified in the denominator of the equation.
A K factor less than unity, results in an effectively larger capacitance on
the output when expressed in terms of the input. With a K = 1/32 as
shown in Figure 22, C = 1 μF would appear as C = 1024 μF when viewed
from the output.
(11)
VIN • IIN – PNL – (IOUT)2 • ROUT
VIN • IIN
= 1–
(
)
PNL + (IOUT)2 • ROUT
VIN • IIN
VTM® Current Multiplier
Rev 1.1
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(12)
VTM 48R P 015 x 050 A B 1
Input and Output Filter Design
Capacitive Filtering Considerations for a
Sine Amplitude Converter™
A major advantage of a SAC™ system versus a conventional PWM
converter is that the former does not require large functional filters.
The resonant LC tank, operated at extreme high frequency, is amplitude
modulated as a function of input voltage and output current and
efficiently transfers charge through the isolation transformer. A small
amount of capacitance embedded in the input and output stages of the
module is sufficient for full functionality and is key to achieving high
power density.
This paradigm shift requires system design to carefully evaluate
external filters in order to:
n Guarantee low source impedance:
To take full advantage of the VTM current multiplier
dynamic response, the impedance presented to its input
terminals must be low from DC to approximately 5 MHz.
Input capacitance may be added to improve transient
performance or compensate for high source impedance.
n Further reduce input and/or output voltage ripple without
sacrificing dynamic response:
Given the wide bandwidth of the VTM module, the source
response is generally the limiting factor in the overall
system response. Anomalies in the response of the source
will appear at the output of the VTM module multiplied by
its K factor.
n Protect the module from overvoltage transients imposed
by the system that would exceed maximum ratings and
cause failures:
The module input/output voltage ranges shall not be
exceeded. An internal overvoltage lockout function
prevents operation outside of the normal operating input
range. Even when disabled, the powertrain is exposed
to the applied voltage and power MOSFETs must
withstand it.
The VI Chip® module input/output voltage ranges must
not be exceeded. An internal overvoltage lockout function
prevents operation outside of the normal operating input
range. Even during this condition, the powertrain is
exposed to the applied voltage and power MOSFETs must
withstand it.
It is important to consider the impact of adding input and output
capacitance to a Sine Amplitude Converter on the system as a whole.
Both the capacitance value and the effective impedance of the
capacitor must be considered.
A Sine Amplitude Converter has a DC Rout value which has already
been discussed. The AC Rout of the SAC contains several terms:
n Resonant tank impedance
n Input lead inductance and internal capacitance
n Output lead inductance and internal capacitance
The values of these terms are shown in the behavioral mode. It is
important to note on which side of the transformer these impedances
appear and how they reflect across the transformer given the K factor.
The overall AC impedance varies from model to model. For most
models it is dominated by DC Rout value from DC to beyond 500 KHz.
The behavioral model should be used to approximate the AC
impedance of the specific model.
Any capacitors placed at the output of the VTM reflect back to the input
of the VTM module by the square of the K factor (Eq. 9) with the
impedance of the VTM module appearing in series. It is very important
to keep this in mind when using a PRM® regulator to power the VTM
module. Most PRM modules have a limit on the maximum amount of
capacitance that can be applied to the output. This capacitance includes
both the PRM output capacitance and the VTM module output
capacitance reflected back to the input. In PRM remote sense
applications, it is important to consider the reflected value of VTM
module output capacitance when designing and compensating the
PRM control loop.
Capacitance placed at the input of the VTM module appear to the load
reflected by the K factor with the impedance of the VTM module in
series. In step-down ratios, the effective capacitance is increased by the
K factor. The effective ESR of the capacitor is decreased by the square of
the K factor, but the impedance of the module appears in series. Still, in
most step-down VTM modules an electrolytic capacitor placed at the
input of the module will have a lower effective impedance compared to
an electrolytic capacitor placed at the output. This is important to
consider when placing capacitors at the output of the module. Even
though the capacitor may be placed at the output, the majority of the
AC current will be sourced from the lower impedance, which in most
cases will be the module. This should be studied carefully in any
system design using a module. In most cases, it should be clear that
electrolytic output capacitors are not necessary to design a stable,
well-bypassed system.
VTM® Current Multiplier
Rev 1.1
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VTM 48R P 015 x 050 A B 1
Current Sharing
Reverse Inrush Current Protection
The SAC™ topology bases its performance on efficient transfer of energy
through a transformer without the need of closed loop control. For this
reason, the transfer characteristic can be approximated by an ideal
current multiplier with some resistive drop and positive temperature
coefficient.
The VTM48RP015x050AB1 provides reverse inrush protection which
prevents reverse current flow until the input voltage is high enough to
first establish current flow in the forward direction. In the event that
there is a DC voltage present on the output before the VTM module is
powered up, this feature protects sensitive loads from excessive dV/dT
during power up as shown in Figure 24.
This type of characteristic is close to the impedance characteristic of a
DC power distribution system, both in behavior (AC dynamic) and
absolute value (DC dynamic).
When connected in an array with the same K factor, the VTM module
will inherently share the load current (typically 5%) with parallel units
according to the equivalent impedance divider that the system
implements from the power source to the point of load.
Some general recommendations to achieve matched array impedances:
If a voltage is present at the output of the VTM module which satisfies
the condition Vout > Vin • K after a successful power up the energy will
be transferred from secondary to primary. The input to output ratio of
the VTM module will be maintained. The VTM module will continue to
operate in reverse as long as the input and output voltages are within
the specified range. The VTM48RP015x050AB1 has not been qualified for
continuous reverse operation.
n Dedicate common copper planes within the PCB
Current Multiplier
to deliver and return the current to the modules.
n Provide the PCB layout as symmetric as possible.
n Apply same input / output filters (if present) to each unit.
For further details see AN:016 Using
in High Power Arrays.
BCM®
TM
VCC
EN_BUS
CM
R
R
VTM®
Bus Converters
VIN
+In
+Out
+
_
-In
VIN
ZIN_EQ1
VTM®1
ZOUT_EQ1
A
VOUT
B
CD
Supply
-Out
E
F
G
H
RO_1
VCC
ZIN_EQ2
+
–
VTM®2
ZOUT_EQ2
VIN
RO_2
Supply
DC
Load
VIN
VOUT
ZIN_EQn
VTM®n
ZOUT_EQn
RO_n
VOUT
Supply
TM
Figure 23 — VTM current multiplier array
EN_BUS
Input Fuse Selection
The VTM is not internally fused, see safety approvals for required fusing.
A: VOUT supply > 0 V
B: VCC to -IN > 4.85 V controller wakes-up, than the EN_BUS pulled
high, reverse inrush protection blocks VOUT supplying VIN
C: VIN supply ramps up
D: VIN > VOUT /K, powertrain starts in normal mode
E: VIN supply ramps down
F: VIN > VOUT /K, powertrain transfers reverse energy
G: VOUT ramps down, VIN follows
H: VCC turns off
Figure 24 — Reverse inrush protection
VTM® Current Multiplier
Rev 1.1
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VTM 48R P 015 x 050 A B 1
Thermal Considerations
The ChiP package provides a high degree of flexibility in that it presents
three pathways to remove heat from internal power dissipating
components. Heat may be removed from the top surface, the bottom
surface and the leads. The extent to which these three surfaces are
cooled is a key component for determining the maximum power that is
available from a ChiP.
Since the ChiP has a maximum internal temperature rating, it is
necessary to estimate this internal temperature based on a real thermal
solution. Given that there are three pathways to remove heat from the
ChiP, it is helpful to simplify the thermal solution into a roughly
equivalent circuit where power dissipation is modeled as a current
source, isothermal surface temperatures are represented as voltage
sources and the thermal resistances are represented as resistors.
Figure 25 shows the “thermal circuit” for a 0623 ChiP VTM in an
application where the top, bottom, and leads are cooled. In this case,
the VTM power dissipation is PDTOTAL and the three surface
temperatures are represented as TCASE_TOP, TCASE_BOTTOM, and TLEADS. This
thermal system can now be very easily analyzed using a SPICE
simulator with simple resistors, voltage sources, and a current source.
The results of the simulation would provide an estimate of heat flow
through the various pathways as well as internal temperature.
Thermal Resistance Top
Figure 26 shows a scenario where there is no bottom side cooling. In
this case, the heat flow path to the bottom is left open and the
equations now simplify to:
TINT – PD1 • 5.9 = TCASE_TOP
TINT – PD3 • 2.4 = TLEADS
PDTOTAL = PD1 + PD3
Thermal Resistance Top
Thermal Resistance Bottom
Power Dissipation (W)
TCASE_BOTTOM(°C)
MAX INTERNAL TEMP
Thermal Resistance Leads
TLEADS(°C)
TCASE_TOP(°C)
+
–
Figure 27 — One side cooling thermal model
Figure 27 shows a scenario where there is no bottom side and leads
cooling. In this case, the heat flow path to the bottom is left open and
the equations now simplify to:
TINT – PD1 • 5.9 = TCASE_TOP
MAX INTERNAL TEMP
PDTOTAL = PD1
Thermal Resistance Bottom
Power Dissipation (W)
TCASE_BOTTOM(°C)
Thermal Resistance Leads
+
–
TLEADS(°C)
+
–
TCASE_TOP(°C)
+
–
Please note that Vicor has a suite of online tools, including a simulator
and thermal estimator which greatly simplify the task of determining
whether or not a VTM thermal configuration is valid for a given
condition. These tools can be found at:
http://www.vicorpower.com/powerbench.
Figure 25 — Double side cooling and leads thermal model
Alternatively, equations can be written around this circuit and
analyzed algebraically:
TINT – PD1 • 5.9 = TCASE_TOP
TINT – PD2 • 5.5 = TCASE_BOTTOM
TINT – PD3 • 2.4 = TLEADS
PDTOTAL = PD1+ PD2+ PD3
Where TINT represents the internal temperature and PD1, PD2, and PD3
represent the heat flow through the top side, bottom side, and leads
respectively.
Thermal Resistance Top
Thermal Resistance Bottom
Power Dissipation (W)
TCASE_BOTTOM(°C)
MAX INTERNAL TEMP
Thermal Resistance Leads
TLEADS(°C)
+
–
TCASE_TOP(°C)
+
–
Figure 26 — One side cooling and leads thermal model
VTM® Current Multiplier
Rev 1.1
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VTM 48R P 015 x 050 A B 1
Product Outline Drawing and Recommended Hole Pattern - Through Hole
8.41±.38
.331±.015
4.21
.166
7.80
.307
0
1.14
.045
(10) PL.
11.25
.443
0
1.02
.040
(2) PL.
0
22.50±.13
.886±.005
.51
.020
(4) PL.
0
.89
.035
(2) PL.
TOP VIEW (COMPONENT VIEW)
.05 [.010]
4.50±.05
.177±.002
SEATING
PLANE
3.30
.130
(18) PL.
1.50
.059
PLATED THRU
.25 [.010]
ANNULAR RING
(8) PL.
MARKED 'B'
9.66±.08
.380±.003
(2) PL.
A
B
B
1.75
.069
(8) PL.
MARKED 'B'
B
+OUT +OUT
-OUT
1.50
.059
PLATED THRU
.25 [.010]
ANNULAR RING
(2) PL.
MARKED A
3.57±.08
.141±.003
0
3.57±.08
.141±.003
.30
.012
(18) PL.
A
-OUT
+OUT +OUT
-OUT
-OUT
+OUT
+OUT
-OUT
-OUT
B
6.93±.08
.273±.003
(2) PL.
B
4.20±.08
.165±.003
(2) PL.
B
1.47±.08
.058±.003
(2) PL.
0
0
.86
.034
PLATED THRU
.25 [.010]
ANNULAR RING
MARKED 'D'
B
3.98±.08
.157±.003
(2) PL.
C
10.32±.08
.406±.003
(2) PL.
D
6.18±.08
.243±.003
(2) PL.
VCC
CM
D
8.19±.08
.323±.003
(2) PL.
+IN
-IN
EN_BUS
D
1.37
.054
PLATED THRU
.25 [.010]
(2) PL.
MARKED 'C'
C
TM
D
E
B
E
0
1.12
.044
(4) PL,
MARKED 'D'
1.26±.08
.050±.003
(2) PL.
1.88
.074
(2) PL.
MARKED 'A'
RECOMMENDED HOLE PATTERN
(COMPONENT SIDE)
1.24
.049
PLATED THRU
.25 [.010]
(2) PL.
MARKED
NOTES:
1- RoHS COMPLIANT, LEAD FREE CST-0001 LATEST REVISION.
2- SEE SHEET 2 FOR RECOMMENDED HOLE PATTERN.
VTM® Current Multiplier
Rev 1.1
vicorpower.com
Page 22 of 24
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800 927.9474
1.63
.064
(2) PL.
MARKED 'C'
1.63
.064
(2) PL.
MARKED 'E'
VTM 48R y 015 x 050 A B 1
Revision History
Revision
Date
Description
1.0
09/05/14
Initial release
1.1
10/24/14
Updated standard product model
Page Number(s)
n/a
1, 2, 3, 13, 23
VTM® Current Multiplier
Rev 1.1
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Page 23 of 24
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VTM 48R y 015 x 050 A B 1
Vicor’s comprehensive line of power solutions includes high density AC-DC and DC-DC modules and
accessory components, fully configurable AC-DC and DC-DC power supplies, and complete custom
power systems.
Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. Vicor makes no
representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves the right to make
changes to any products, specifications, and product descriptions at any time without notice. Information published by Vicor has been checked and
is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies. Testing and other quality controls are
used to the extent Vicor deems necessary to support Vicor’s product warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
Specifications are subject to change without notice.
Vicor’s Standard Terms and Conditions
All sales are subject to Vicor’s Standard Terms and Conditions of Sale, which are available on Vicor’s webpage or upon request.
Product Warranty
In Vicor’s standard terms and conditions of sale, Vicor warrants that its products are free from non-conformity to its Standard Specifications (the
“Express Limited Warranty”). This warranty is extended only to the original Buyer for the period expiring two (2) years after the date of shipment
and is not transferable.
UNLESS OTHERWISE EXPRESSLY STATED IN A WRITTEN SALES AGREEMENT SIGNED BY A DULY AUTHORIZED VICOR SIGNATORY, VICOR DISCLAIMS
ALL REPRESENTATIONS, LIABILITIES, AND WARRANTIES OF ANY KIND (WHETHER ARISING BY IMPLICATION OR BY OPERATION OF LAW) WITH
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no liability for applications assistance or buyer product design. Buyers are responsible for their products and applications using Vicor products and
components. Prior to using or distributing any products that include Vicor components, buyers should provide adequate design, testing and
operating safeguards.
Vicor will repair or replace defective products in accordance with its own best judgment. For service under this warranty, the buyer must contact
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returned to the buyer. The buyer will pay all charges incurred in returning the product to the factory. Vicor will pay all reshipment charges if the
product was defective within the terms of this warranty.
Life Support Policy
VICOR’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS
PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used herein, life support
devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform
when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the
user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms and Conditions of Sale, the user of Vicor products
and components in life support applications assumes all risks of such use and indemnifies Vicor against all liability and damages.
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Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the
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The products described on this data sheet are protected by the following U.S. Patents Numbers:
5,945,130; 6,403,009; 6,710,257; 6,911,848; 6,930,893; 6,934,166; 6,940,013; 6,969,909; 7,038,917; 7,145,186; 7,166,898; 7,187,263;
7,202,646; 7,361,844; D496,906; D505,114; D506,438; D509,472; and for use under 6,975,098 and 6,984,965.
Vicor Corporation
25 Frontage Road
Andover, MA, USA 01810
Tel: 800-735-6200
Fax: 978-475-6715
email
Customer Service: [email protected]
Technical Support: [email protected]
VTM® Current Multiplier
Rev 1.1
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Page 24 of 24
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