End of Life
DCM™ DC-DC Converter
DCM3717S60E14G5TN0
48V to Point-of-Load Non-Isolated, Regulated DC Converter
Features & Benefits
Product Ratings
• Wide input range 40 – 60VDC
VIN = 40 – 60V
• Wide output range 10.0 – 13.5VDC
VOUT = 12.2V Nominal
(10.0 – 13.5V)
• 97.0% peak efficiency
• Up to 750W or 62.5A continuous operation
• Up to 900W or 75A transient peak
• >1MHz switching frequency
• PMBus® compatible telemetry
• Internal voltage, current and temperature shut down
• Parallel-capable up to four units
Typical Applications
• Data Center Applications
• High-Performance Computing Systems (HPC)
• Mild Hybrid and Autonomous Vehicles
• Industrial Systems
POUT = 750W
IOUT = 62.5A (max)
Product Description
The DCM3717 is non‑isolated, regulated DC‑DC converter module
that operates from a semi‑regulated 40 – 60V input to generate a
regulated point‑of‑load output voltage range of 10.0 – 13.5V. The
DCM3717 in the SM-ChiP package configuration utilizes the Vicor
patented zero‑voltage switching (ZVS) buck-boost regulator stage
followed by the Sine Amplitude Converter (SAC™).
Leveraging the thermal density benefits of the Vicor SM‑ChiP
packaging technology, the DCM offers flexible thermal
management options with very low top- and bottom‑side thermal
impedances. Thermally adept SM-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.
Package Information
• Vicor DCM3717 SM-ChiP™ package enables
low‑impedance interconnect to system board
• 36.7 x 17.3 x 7.42mm
Note: Product images may not highlight current product markings.
DCM™ DC-DC Converter
Page 1 of 31
Rev 1.5
02/2021
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DCM3717S60E14G5TN0
Typical Application
510mΩ
4x
1206 CER
4.7µF, 100V
+INV
Power Ground
IMON
EAO
ADDR
SDA
SCL
EN
VOUT
8x
1206 CER
22µF, 25V
DCM3717
PGND
SYNCI
47µF
Aluminum
Power Ground
+OUT
+IN
72nH
Fuse
FLT
VIN
System Enable
System Fault* Monitor
RADDR
System SCL
System SDA
2kΩ
Signal Ground
2kΩ
+
–
5.1V
Typical application 1
510mΩ
+OUT
+IN
DCM3717
Module 1
8x
1206 CER
22µF, 25V
Power Ground
+INV
SCL
FLT
RSG1
EN
PGND
IMON
4x
1206 CER
4.7µF, 100V
SYNCI
47µF
Aluminum
EAO
72nH
ADDR
Fuse
SDA
VIN
RADDR1
510mΩ
+IN
+OUT
DCM3717
Module 2
System Enable
System Fault* Monitor
RADDR2
System SCL
System SDA
2kΩ
SGND_COMMON
2kΩ
+
–
5.1V
Typical application 2: parallel array of two DCM3717 modules
DCM™ DC-DC Converter
Page 2 of 31
Rev 1.5
02/2021
8x
1206 CER
22µF, 25V
Power Ground
+INV
SCL
FLT
RSG2
EN
PGND
IMON
Power Ground
SYNCI
4x
1206 CER
4.7µF, 100V
EAO
47µF
Aluminum
ADDR
72nH
SDA
Fuse
VOUT
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DCM3717S60E14G5TN0
Terminal Configuration
+OUT
Top View
4
PGND
5
3
PGND
16
PGND
PGND
6
2
PGND
+INV
7
1
+IN
IMON
SDA
SYNCI
FLT
ADDR
EN
9 10 11 12 13 14 15
SCL
EAO
8
Top Side Indicator
DCM3717 SM-ChiP™
Terminal Descriptions
Signal Name
Pin
Number
+IN
1
PGND
2, 3, 5, 6, 16
Description
Positive input power terminal.
[a]
Power ground.
+OUT
4
Positive output power terminal.
+INV
7
Intermediate power terminal.
EAO
8
Transconductance error amplifier output and powertrain modulator control node.
EN
9
DCM Enable control.
SCL
10
Digital serial communication clock pin.
ADDR
11
I2C™ address assignment.
FLT [b]
12
Fault Flag; pulled low when a fault is detected.
SDA
13
Digital serial communication data pin.
SYNCI
14
Factory use only.
IMON
15
Factory use only.
[a]
Pin 16 represents the package top and bottom conductive plating. Refer to product outline for additional details.
[b] Overbar (FLT) or star (FLT*) marking signify an active low designation.
DCM™ DC-DC Converter
Page 3 of 31
Rev 1.5
02/2021
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DCM3717S60E14G5TN0
Part Ordering Information
Part Number
Temperature Grade
Option
Tray Size
DCM3717S60E14G5TN0
T = –20 to 125°C
0 = 12.2V nominal output
24 parts per tray
All products shipped in JEDEC standard high-profile (0.400” thick) trays (JEDEC Publication 95, Design Guide 4.10).
Storage and Handling Information
Note: For compressive loading refer to Application Note AN:036, “Recommendations for Maximum Compressive Force of Heat Sinks.”
Attribute
Comments
Specification
Storage Temperature Range
–20 to 125°C
Operating Internal Temperature Range (TINT)
–20 to 125°C
Weight
19.5g
Package Plating
75µm copper with ENiG surface finish
MSL Rating
MSL4, 245°C maximum reflow temperature
ESD Rating
Human Body Model
JEDEC JS-001-2017, Table 2B
Class 1B, ≤ 1000V
Charged Device Model
JESD22C101-E, JS-002-2018
CLASS 1C, ≥ 200V to < 500V
Reliability and Agency Approvals
Attribute
MTBF
Comments
Value
Telcordia Issue 2, Method I Case 3
11.1
MIL-HDBK-217Plus Parts Count - 25°C Ground Benign,
Stationary, Indoors / Computer
4.79
Unit
MHrs
Agency Approvals/Standards
CE Marked for Low Voltage Directive and RoHS Recast Directive, as applicable
Absolute Maximum Ratings
Note: ABSOLUTE MAXIMUM ratings below are stress ratings only. Operation at or beyond these maximum ratings can cause permanent damage to device.
Electrical specifications do not apply when operating beyond rated operating conditions. Operating beyond rated operating conditions for an extended period
of time may affect device reliability. All voltages are referenced to PGND.
Parameter
+IN
+INV
+OUT
Comments
Min
Max
Unit
Continuous, non-operating
–0.3
80
V
Continuous, non-operating
–0.3
80
V
±40
A
Continuous, non-operating
–0.3
15
V
±120
A
EAO
–0.3
5.5
V
EN
–0.3
5.5
V
SCL, SDA, ADDR
–0.3
5.5
V
–0.3
5.5
V
±20
mA
FLT
DCM™ DC-DC Converter
Page 4 of 31
Rev 1.5
02/2021
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DCM3717S60E14G5TN0
Functional Block Diagram
DCM3717
+IN
PGND
+INV
Stage 1
Stage 2
ZVS Buck-Boost Regulator
K = 1/4
Current
Mul plier
Powertrain
Fault Protec on
Powertrain
Fault Protec on
PMBus
Reference
So Start
EN ADDR SCL SDA
DCM™ DC-DC Converter
Page 5 of 31
+
–
EAO
Rev 1.5
02/2021
FLT
+OUT
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DCM3717S60E14G5TN0
Electrical Characteristics
Specifications apply over all line and load conditions unless otherwise noted; boldface specifications apply over the temperature range of
–20°C ≤ TINT ≤ 125°C (T-Grade). All other specifications are at TINT = 25°C unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
40.0
54.0
60.0
V
1
V/µs
12
V
Powertrain Input Specifications
Input Voltage Range
VIN
Input Voltage Slew Rate
dVIN/dt
Input Voltage for ADDR Latch
VIN_ADDR
Continuous, operating
Initial power up
No-Load Input Power
PNL
ENABLE HIGH, VIN = 54.0V, VOUT = 12.2V
Input Quiescent Current
IQC
ENABLE LOW, VIN = 54.0V
6
7
W
6.8
8
mA
14.5
A
Input Current
IIN_DC
IOUT = 61.5A, VIN = 54.0V, VOUT = 12.2V
14.35
Input Capacitance (Internal)
CIN_INT
Effective value, VIN = 54.0V
2.25
µF
RC-IN
Effective value, VIN = 54.0V
8
mΩ
Input Capacitance (Internal) ESR
Powertrain Output Specifications
Output Voltage Set Point
Output Voltage Trim Range
VOUT_SET
VOUT-REG-LOAD
Output Voltage Line Regulation
VOUT-REG-LINE
12.07
12.2
10.0
VOUT
Output Voltage Load Regulation
Total Regulation Error
DCM3717S60E14G5TN0, no load;
typical value lists product nominal VOUT
For load > 10%
12.32
V
13.5
V
0.1
0.2
%
0.1
0.3
%
0.5
%
VOUT-REG-TOTAL
Rated Output Current, Continuous
IOUT
VOUT ≤ 12.0V
62.5
A
Rated Output Power, Continuous
POUT
12.0V < VOUT
750
W
VOUT ≤ 12.0V, ≤ 1ms pulse width, ≤ 10% duty cycle
75
A
12.0 < VOUT ≤ 13.0V, ≤ 1ms pulse width, ≤ 10% duty cycle
900
W
VOUT = 13.5V, ≤ 1ms pulse width, ≤ 10% duty cycle;
Rating is linear with VOUT; see Figure 1
850
W
4
DCMs
Rated Output Current, Peak
IOUT_PK
Rated Output Power, Peak
POUT_PK
Array Size
nARRAY
Switching Frequency,
Buck-Boost Stage 1
FSW1
Switching Frequency,
Current Multiplier Stage 2
FSW2
Transfer Ratio,
Current Multiplier Stage 2
K
Minimum Off Time to Restart
Off Time for Monotonic Restart
tOFF
tOFF-MONO
VIN = 54.0V, VOUT = 12.2V, IOUT = 61.5A
0.65
Over rated line, continuous load, trim and temperature,
exclusive of burst mode
0.35
VIN = 54.0V, VOUT = 12.2V, IOUT = 61.5A
1.3
Over rated line, continuous load, trim and temperature
1.3
0.80
1.4
1.4
1.5
1.8
1/4
When externally disabled with EN or FLT pin
0
tON
From EN release to soft-start ramp, VIN pre-applied
Output Voltage Rise Time
tSS
From soft start begin to VOUT settled to within 5% for
nominal VOUT
Output Voltage Soft-Start
Slew Rate
dVOUT/dt
All rated VOUT trim range
Rev 1.5
02/2021
MHz
MHz
V/V
500
15
Extend disable time with EN or FLT
Output Turn-On Delay
DCM™ DC-DC Converter
Page 6 of 31
0.72
480
µs
s
µs
11
16
26
ms
0.47
0.76
1.1
V/ms
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DCM3717S60E14G5TN0
Electrical Characteristics (Cont.)
Specifications apply over all line and load conditions unless otherwise noted; boldface specifications apply over the temperature range of
–20°C ≤ TINT ≤ 125°C (T-Grade). All other specifications are at TINT = 25°C unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
VIN = 54.0V, VOUT = 12.2V, IOUT = 61.5A, TCASE = 25°C
96.2
96.8
VIN = 54.0V, VOUT = 12.2V, IOUT = 31A, TCASE = 25°C
96.4
96.6
VIN = 40.0 – 60.0V, VOUT = 12.2V, IOUT = 31A, TCASE = 25°C
95.0
Max
Unit
Powertrain Output Specifications (Cont.)
Efficiency, Ambient
Efficiency, Hot
Efficiency Over Temperature
ηAMB
ηHOT
η
VIN = 40.0 – 60.0V, IOUT = 55.6A, TCASE = 25°C, over trim
94.0
VIN = 54.0V, VOUT = 12.2V, IOUT = 61.5A, TCASE = 100°C
95.6
96.2
VIN = 54.0V, VOUT = 12.2V, IOUT = 31A, TCASE = 100°C
95.7
96.3
VIN = 40.0 – 60.0V, VOUT = 12.2V, IOUT = 31A,
TCASE = 100°C
94.8
VIN = 40.0 – 60.0V, IOUT = 55.6A,
TCASE = 100°C, over trim
93.2
VIN = 40.0 – 60.0V, VOUT = 12.2V,
>50% rated load current, over temperature
94.2
VIN = 40.0 – 60.0V,
>50% rated load current, over temperature and trim
93.2
%
%
%
Output Voltage Ripple
VOUT_PP
VIN = 54.0V, VOUT = 12.2V, IOUT = 61.5A,
COUT-EXT = 0µF, 20 MHz BW
280
mVP-P
Output Capacitance (Internal)
COUT_INT
Effective value, VOUT = 12.2V
45.5
µF
RCOUT
Effective value, VOUT = 12.2V
2.9
mΩ
Output Capacitance (Internal) ESR
Load Capacitance (Electrolytic)
Load Capacitance (Ceramic)
Load Capacitance (Total)
CLOAD_ALEL
CLOAD_CER
ESR ≤ 100mΩ, nominal value
CLOAD_TOTAL
0
10
0
200
µF
0
10
mF
0.5
V
Load Transient Voltage Deviation
VTRANS
10 ↔ 100% load step, 10A/µs,
COUT-EXT = 5x 22µF ceramic and 2x 1000µF aluminum
0.37
Load Transient Recovery Time
tTRANS
10 ↔ 100% load step, 10A/µs,
COUT-EXT = 5x 22µF ceramic and 2x 1000µF aluminum
200
DCM™ DC-DC Converter
Page 7 of 31
Rev 1.5
02/2021
mF
µs
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DCM3717S60E14G5TN0
Electrical Characteristics (Cont.)
Specifications apply over all line and load conditions unless otherwise noted; boldface specifications apply over the temperature range of
–20°C ≤ TINT ≤ 125°C (T-Grade). All other specifications are at TINT = 25°C unless otherwise noted.
Attribute
Symbol
Conditions / Notes
Min
Typ
Max
Unit
37.3
38.9
V
Powertrain Protections
Input Undervoltage Turn-ON
VIN_UVLO+
Powertrain recovery
Input Undervoltage Turn-OFF
VIN_UVLO–
Powertrain shut down
34.8
36.5
V
Input Overvoltage Turn-ON
VIN_OVLO–
Powertrain recovery
61.0
63.7
V
Input Overvoltage Turn-OFF
VIN_OVLO+
Powertrain shut down
66.0
TOT
125
EAO Overload
VEAO_OL
3.23
EAO Overload Timeout
tEAO_OL
Overtemperature Shut Down
Overcurrent Shut Down
IOC
Overcurrent Timeout
tIOC
Short Circuit Shut Down
EAO continuously above VEAO_OL
Output current above IOC
VOUT_OVP
Relative to module +INV terminal
Output OVP Relative
%EAIN_HI
Relative to the VOUT_COMMAND; inactive during start up
and for tEAIN_HI after a VOUT_COMMAND
tEAIN_HI
Fault Protection Response Time
tPROT
Fault Protection Recovery Time
tPROT_RECOVERY
Overcurrent Protection
Recovery Time
tOC_RECOVERY
V
°C
3.3
V
1000
µs
70
87
A
1
4
ms
85
ISHORT
Output OVP Turn-OFF
Output OVP Relative Timeout
69.2
A
55.5
4
56.7
V
15
%
2.1
s
Excluding tEAO_OL and tIOC timeout periods
1
µs
Excluding IOC, ISHORT and TOT shut downs
30
ms
Recovery from stage-2 multiplier OVP,
IOC shut downs only
140
ms
Blanking time for output OVP relative shut down
following VOUT_COMMAND
PMBus® Characteristics
READ_VIN Accuracy
VREAD_VIN_ACC
At nominal VIN
READ_VIN Resolution
VREAD_VIN_RES
Limited to PMBus READ_VIN format resolution
VOUT_COMMAND
Functional Range
VREAD_VIN_RNG
Limits from MFR_VOUT_MIN and MFR_VOUT_MAX;
Rated voltage trim range given by VOUT
VOUT_COMMAND Resolution
–1.4
READ_VOUT Resolution
VREAD_VOUT_RES
READ_TEMPERATURE Accuracy
VREAD_TEMP_ACC Disabled, with TCASE = 25°C
DCM™ DC-DC Converter
Page 8 of 31
6.0
fPMBUS
14.03
–1.4
Rev 1.5
02/2021
8
V
mV
6
400
Child mode
NSTORE_USER_CODE Permanent storage of VOUT_COMMAND
V
mV
1.4
35.2
–6
V
mV
21.5
VREAD_VOUT_ACC At nominal trim, +INV referred
PMBus Operating Frequency Range
125
VREAD_VIN_RNG
READ_VOUT Accuracy
STORE_USER_CODE Capacity
1.4
°C
kHz
Writes
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DCM3717S60E14G5TN0
Signal Characteristics
Specifications apply over all line and load conditions unless otherwise noted; boldface specifications apply over the temperature range of
–20°C ≤ TINTERNAL ≤ 125°C (T-Grade). All other specifications are at TINTERNAL = 25°C unless otherwise noted.
Control Node: EAO
Signal Type
State
Normal
Operation
Analog
Pulse
Skipping
Attribute
Symbol
EAO Voltage Range
VEAO
EAO Current Drive
IEAO
EAO Pulse Skip Threshold
Fault Protection
EAO Sink Current
Active
Conditions / Notes
Across line, trim, load, temperature
Min
Typ
Max
Unit
0.0
3.15
V
300
600
µA
VEAO_SKIP
Lower side of hysteretic range
0.4
V
IEAO_FAULT
Pull down to 0V
450
µA
Enable: EN
Signal Type
State
Digital
Input
Any
No Fault
Attribute
Symbol
EN High Threshold
VEN_HIGH
EN Low Threshold
VEN_LOW
EN Source Current
IEN
Conditions / Notes
Min
Typ
Max
1.1
V
0.7
Pull up to 2V
Unit
50
V
µA
Serial Clock: SCL
Serial Data: SDA
Signal Type
State
Attribute
Rated Input Range
Digital
Input/Output
Any
Symbol
Conditions / Notes
VSERIAL
Min
Max
Unit
0.0
5.0
V
400
kHz
SCL Frequency
FSCL
100
Input High Voltage
VIH
1.35
Input Low Voltage
VIL
Output Low Voltage
VOL
Typ
V
0.8
V
0.4
V
Typ
Max
Unit
10.5
30
ms
Typ
Max
Unit
5.3
V
Sinking 6mA
Address: ADDR
Signal Type
State
Attribute
Symbol
Multi-level
Digital Input
Initial
Power Up
Address Registration Delay
tADDR_DLY
Conditions / Notes
Min
From VIN crossing VIN_ADDR
Fault: FLT
Signal Type
State
Open Drain
Digital I/O
Normal
Operation
Digital Output
Digital Input
Attribute
Pull-up Voltage
Fault Protection
Sink Current
Active
Transition
to Fault
DCM™ DC-DC Converter
Page 9 of 31
Input Voltage Threshold
Symbol
VFLT_INACTIVE
Conditions / Notes
Min
Effective RPULL-UP = 10kΩ
IFLT_ACTIVE
Fault active, VFLT = 400mV
VFLT_ACTIVE
To externally induce shut down
Rev 1.5
02/2021
4
0.85
mA
1.1
V
End of Life
DCM3717S60E14G5TN0
Specified Operating Area
77.5
Output Current (A)
75
72.5
70
67.5
65
62.5
60
57.5
55
10
10.5
11
11.5
12
12.5
13
13.5
Output Voltage (V)
Pulsed, 1ms
Continuous
800
800
700
700
Output Power (W)
Output Power (W)
Figure 1 — Electrical specified operating area vs. VOUT
600
500
400
300
200
100
600
500
400
300
200
100
0
0
25
50
75
100
125
25
50
Case Temperature (°C)
VIN:
40V
54V
75
100
Case Temperature (°C)
60V
Figure 2 — Thermal specified operating area;
bottom‑side cooling, output power vs. case
temperature, nominal trim
VIN:
40V
54V
60V
Figure 3 — Thermal specified operating area;
double‑sided cooling, output power vs. case
temperature, nominal trim
DCM™ DC-DC Converter
Rev 1.5
Page 10 of 31 02/2021
125
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DCM3717S60E14G5TN0
Typical Performance Characteristics – Efficiency and Power Dissipation
98
40
97
35
Power Dissipation (W)
Efficiency (%)
The following figures present performance data in a typical application environment.
96
95
94
93
92
91
90
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
15
Output Current (A)
VIN:
40V
54V
60V
VIN:
30
35
40
45
50
55
60
65
40V
54V
60
65
60
65
60V
Figure 6 — Power dissipation at 25°C case temperature,
VOUT = 10.0V
98
45
97
40
Power Dissipation (W)
Efficiency (%)
25
Output Current (A)
Figure 5 — Efficiency at 25°C case temperature,
VOUT = 10.0V
96
95
94
93
92
91
35
30
25
20
15
10
5
0
90
5
10
15
20
25
30
35
40
45
50
55
60
0
65
5
10
15
VIN:
40V
54V
20
25
30
35
40
45
50
55
Output Current (A)
Output Current (A)
VIN:
60V
Figure 7 — Efficiency at 25°C case temperature,
VOUT = 12.2V
40V
54V
60V
Figure 8 — Power dissipation at 25°C case temperature,
VOUT = 12.2V
98
50
97
45
Power Dissipation (W)
Efficiency (%)
20
96
95
94
93
92
91
90
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
Output Current (A)
VIN:
40V
54V
Figure 9 — Efficiency at 25°C case temperature,
VOUT = 13.5V
15
20
25
30
35
40
45
50
55
Output Current (A)
60V
VIN:
40V
54V
60V
Figure 10 — Power dissipation at 25°C case temperature,
VOUT = 13.5V
DCM™ DC-DC Converter
Rev 1.5
Page 11 of 31 02/2021
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DCM3717S60E14G5TN0
Typical Performance Characteristics – Efficiency and Power Dissipation (Cont.)
98
40
97
35
Power Dissipation (W)
Efficiency (%)
The following figures present performance data in a typical application environment.
96
95
94
93
92
91
90
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
15
Output Current (A)
VIN:
40V
54V
60V
VIN:
30
35
40
45
50
55
60
65
40V
54V
60V
Figure 12 — Power dissipation at 100°C case temperature,
VOUT = 10.0V
98
50
97
45
Power Dissipation (W)
Efficiency (%)
25
Output Current (A)
Figure 11 — Efficiency at 100°C case temperature,
VOUT = 10.0V
96
95
94
93
92
91
90
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
15
Output Current (A)
VIN:
40V
54V
60V
VIN:
Power Dissipation (W)
97
96
95
94
93
92
91
90
10
15
20
25
30
35
40
45
40V
54V
30
35
40
45
50
55
60
65
50
40V
54V
60V
55
60
55
50
45
40
35
30
25
20
15
10
5
0
0
65
5
10
15
20
25
30
35
40
45
50
55
60
Output Current (A)
Output Current (A)
VIN:
25
Figure 14 — Power dissipation at 100°C case temperature,
VOUT = 12.2V
98
5
20
Output Current (A)
Figure 13 — Efficiency at 100°C case temperature,
VOUT = 12.2V
Efficiency (%)
20
VIN:
60V
Figure 15 — Efficiency at 100°C case temperature,
VOUT = 13.5V
40V
54V
60V
Figure 16 — Power dissipation at 100°C case temperature,
VOUT = 13.5V
DCM™ DC-DC Converter
Rev 1.5
Page 12 of 31 02/2021
65
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DCM3717S60E14G5TN0
Typical Performance Characteristics – Efficiency and Power Dissipation (Cont.)
98
40
97
35
Power Dissipation (W)
Efficiency (%)
The following figures present performance data in a typical application environment.
96
95
94
93
92
91
90
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
15
Output Current (A)
VIN:
40V
54V
60V
VIN:
30
35
40
45
50
55
60
65
40V
54V
60V
Figure 18 — Power dissipation at –20°C case temperature,
VOUT = 10.0V
98
40
97
35
Power Dissipation (W)
Efficiency (%)
25
Output Current (A)
Figure 17 — Efficiency at –20°C case temperature,
VOUT = 10.0V
96
95
94
93
92
91
90
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
15
Output Current (A)
VIN:
40V
54V
20
25
30
35
40
45
50
55
60
65
Output Current (A)
60V
VIN:
Figure 19 — Efficiency at –20°C case temperature,
VOUT = 12.2V
40V
54V
60V
Figure 20 — Power dissipation at –20°C case temperature,
VOUT = 12.2V
98
50
97
45
Power Dissipation (W)
Efficiency (%)
20
96
95
94
93
92
91
90
40
35
30
25
20
15
10
5
0
5
10
15
20
25
30
35
40
45
50
55
60
65
0
5
10
Output Current (A)
VIN:
40V
54V
15
20
25
30
35
40
45
50
55
60
Output Current (A)
60V
Figure 21 — Efficiency at –20°C case temperature,
VOUT = 13.5V
VIN:
40V
54V
60V
Figure 22 — Power dissipation at –20°C case temperature,
VOUT = 13.5V
DCM™ DC-DC Converter
Rev 1.5
Page 13 of 31 02/2021
65
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DCM3717S60E14G5TN0
Terminal Descriptions
ADDR, SCL, SDA – PMBus Interface
Address, Serial Clock and Serial Data
+IN – DCM Input Power
Address is a multi-level analog input which sets the address at
initial power-up. See PMBus® interface section for details on
device address.
The +IN pin is the power input to the regulation stage. External
filtering and decoupling techniques are application-specific.
Low‑ESR ceramic capacitors are recommended between the DCM
input and power ground.
PGND – Power Ground
The DCM is a three-terminal non-isolated regulator. PGND is the
common power return for +IN and +OUT.
+OUT – DCM Output Power
The +OUT pin is the power output from the current multiplication
stage. External filtering and decoupling techniques are
application‑specific. Low‑ESR ceramic capacitors are recommended
between the DCM output and power ground.
Serial clock (SCL) and serial data (SDA) require external pull-up
resistors for normal operation. Refer to System Management Bus
(SMBus) Specification version 3.0 for details.
FLT – Fault Monitor
FLT is an open-drain pin with an internal pull-up and indicates fault
status. FLT is active-low, so when any fault protection is active
the pin will drive low. When the module is enabled and not in a
fault condition, the pin will be pull high. The module monitors the
status of this pin, and so if an external sub-circuit pulls FLT low, the
module will also be disabled.
Note: FLT displayed as FLT* on the package drawing.
+INV – DCM Intermediate Power Node
SYNCI – Factory Use Only
The +INV pin is an intermediate power node between the
regulation and current-multiplication powertrain stages.
Do not connect to the SYNCI pin.
EAO – Modulator Input
Do not connect to the IMON pin.
IMON – Factory Use Only
The EAO pin provides access to the error amplifier output and is
the control node input to the regulation stage, which determines
the DCM output power.
EN – Enable
If the EN pin is left floating or driven high, the DCM is enabled.
When EN is pulled low, the DCM is disabled.
DCM™ DC-DC Converter
Rev 1.5
Page 14 of 31 02/2021
End of Life
Functional Description
The DCM3717S60E14G5TN0 is a non-isolated, regulated DC‑DC
power converter with PMBus® control and telemetry, in a thermally
adept package. It consists of a ZVS buck-boost first‑stage block
followed by a ZVS, ZCS Sine Amplitude Converter™ current
multiplier second stage. The current multiplier operates at a fixed
step‑down ratio of 4, and so all regulation is performed by Stage 1.
The output voltage sense for the regulation control loop is taken at
the module output terminals after the current multiplier, for tight
regulation accuracy. All PMBus output voltage set‑point control and
telemetry is provided by Stage 1.
The DCM offers peak current and power ratings that are generally
20% higher than the continuous ratings for up to 1ms for dynamic
loads higher transient requirements. The full peak load capability is
available up to an output voltage set point of 13.0V. Above 13.0V
the peak current rating is linearly reduced to avoid risk of shut
down due to overvoltage protection, as shown in Figure 1.
DCM Power Up
When input voltage is applied, the DCM PMBus address is sensed
and latched based on the pull‑down resistor applied to the ADDR
pin. The address remains fixed until input voltage is removed.
DCM3717S60E14G5TN0
Pulse‑Skip Mode (PSM)
The ZVS buck-boost stage features a hysteretic pulse-skipping
mode. At light‑load conditions, switching cycles can be skipped
in order to significantly reduce gate‑drive power and improve
efficiency. The regulator will automatically enter and exit PSM
based on load. Depending on line and trim operating conditions, as
well as capacitor and other component values, PSM may result in
occasional skipping of one or many switching cycles.
Variable‑Frequency Operation
The ZVS buck-boost stage is pre-programmed to a fixed, maximum
base operating frequency. The maximum processed power
determines the base frequency and associated power inductor with
respect to other constraints to achieve peak efficiency at nominal
operation. The operating frequency can be reduced from the base
frequency as needed to maintain rated power capability at certain
line voltage, trim voltage and load conditions. By reducing the
operating frequency, or stretching the period of each switching
cycle, the ZVS operation is preserved throughout the input line
voltage range maintaining optimum efficiency. The current
multiplication stage also exhibits variable frequency operation,
though over a smaller frequency range relative to that of the ZVS
buck-boost stage.
DCM Start Up
Any time the DCM input voltage is within UVLO and OVLO, the
DCM has not been disabled via the EN or FLT control pins, and it
has recovered from any previously occurring fault protections, it will
attempt to start.
At start up, the FLT pin goes inactive (high) and the Stage 2 current
multiplier begins switching. Then the Stage 1 buck‑boost regulator
stage begins switching and its reference rises to generate the
soft‑start ramp of module output voltage. The module output is
capable of full rated continuous output current during soft‑start.
The DCM output voltage rise is monotonic during soft start into
static loads, once VOUT exceeds 1.2V, provided the module has
been disabled for at least tOFF-MONO. If the module restarts more
quickly than tOFF-MONO then residual energy stored on the +INV
node between the Stage 1 and Stage 2 powertrains can cause
an output voltage transient to occur at the beginning of the
soft‑start ramp.
The DCM can start up into a precharged output up to 6.0V with
no additional considerations. Starting the DCM into a precharged
VOUT higher than 6.0V is not recommended due to risk that ring‑up
could trigger VOUT-OVP fault.
DCM™ DC-DC Converter
Rev 1.5
Page 15 of 31 02/2021
End of Life
DCM3717S60E14G5TN0
DCM Fault Response
Output Overvoltage Threshold (VOUT_OVP)
If the DCM detects a fault condition, the FLT pin drives low and
the module stops processing power within the fault protection
response time tPROT. The input overvoltage, input undervoltage,
and overtemperature fault conditions, as well as FLT pin low are
continuously monitored, and the DCM will not restart as long
as they persist. Once the fault condition is removed and the
appropriate fault recovery time (tPROT_RECOVERY or tOC_RECOVERY ) has
elapsed, the DCM will release FLT and will attempt a restart. Other
fault types like overload or short circuit condition can only occur
when the module is operating. After shut down, the DCM will
repeatedly attempt a restart after a delay, and will shut down again
as long the load fault condition persists.
The DCM will shut down if the output voltage rises above
the OVP threshold, VOUT_OVP. The sense point is taken before
the second‑stage current multiplier, and so the effective
output‑referred threshold depends on the voltage drop across
the second stage.
Input Undervoltage Recovery and Lockout Threshold
(VIN_UVLO+ and VIN_UVLO–)
A VOUT_OVP fault will set byte 0, bit 5 in the
MFR_STATUS_FAULTS (F0h) status register.
Output OVP Relative (%EAIN_HI)
The DCM will shut down if the module output voltage is more than
%EAIN_HI higher than the programmed output voltage, for more
than tEAIN_HI. This protection is inactive during soft start as well as
for timeout period tEAIN_HI following a VOUT_COMMAND change
to output voltage trim.
The regulator stage monitors the +IN pin. The DCM will not start
until the input voltage exceeds the undervoltage recovery threshold
(VIN_UVLO+), and the DCM will shut down if the input voltage
crosses below the undervoltage lockout threshold (VIN_UVLO–).
%EAIN_HI will set EAIN_HI, byte 1, bit 5 in the
MFR_STATUS_FAULTS (F0h) status register.
A VIN_UVLO will set byte 0, bit 3 in the MFR_STATUS_FAULTS (F0h)
status register.
EAO is the control input to the Stage 1 regulator. The EAO voltage
is driven by the internal transconductance error amplifier closing
the voltage control loop. The voltage on EAO can exceed the EAO
Overload Threshold voltage (VEAO_OL) when the DCM is overloaded.
Input Overvoltage Lockout Threshold and Recovery
(VIN_OVLO+ and VIN_OVLO–)
If the input voltage rises above the overvoltage lockout threshold
(VIN_OVLO+), the DCM will shut down. FLT is active continuously
while the input voltage is too high.
For both input voltage fault protections, FLT drives low
continuously when the input voltage is out of range. Once input
voltage is reestablished and after Fault Protection Recovery Time
(tPROT_RECOVERY ) has elapsed, FLT is released and the
regulator will restart.
A VIN_OVLO will set byte 0, bit 4 in the MFR_STATUS_FAULTS (F0h)
status register.
Overtemperature Fault Threshold
(TOT )
The DCM features a thermal shut down, TOT, which is designed to
protect against catastrophic failure due to excessive temperatures.
The overtemperature shut down cannot be used to ensure the
device stays within the recommended operating temperature
range, because it engages when the product is operated above
the maximum rated temperature. As with other fault protections,
when overtemperature shut down occurs, the DCM stops
processing power and FLT drives low. The DCM will restart after the
temperature has decreased.
If the Overtemperature fault threshold is exceeded, byte 2, bit 0 in
the MFR_STATUS_FAULTS (F0h) status register will be set.
FLT Fault
EAO Overload (VEAO_OL)
A timer permits transient overload conditions to occur without
triggering fault protection. However if EAO remains above its
overload threshold for longer than tEAO_OL, the DCM will shut down
and FLT will be driven low.
The EAO Overload fault will set byte 2, bit 2 in the
MFR_STATUS_FAULTS (F0h) status register.
Overcurrent Threshold (IOC)
The DCM output current is continuously measured during
operation, and if it exceeds the overcurrent shutdown threshold
(IOC), for longer than overcurrent timeout (tIOC), the DCM will
shutdown and FLT is driven low. Unlike the other fault protections,
overcurrent is monitored by both the current multiplier stage and
the buck-boost regulation stage. If the buck-boost stage detects
the overcurrent, then the MFR_STATUS_FAULT bits VOUT_NEG
or Q3_SIL may set. If only the current multiplier stage detects the
fault, then only the FLT pin falling edge will be set. Any of these
bits indicate the presence of an overcurrent condition. The DCM
will restart after the recovery time tPROT_RECOVERY or tOC_RECOVERY
depending on which powertrain stage shut down.
Short Circuit Protection (ISHORT )
In the event of a short circuit occurring during operation or during
start up, the DCM fast short-circuit protection will shut down the
powertrain and drive FLT low. The MFR_STATUS_FAULT bits Q1_FIL
or Q3_FIL should set. The VOUT_NEG may also set. The DCM will
restart after the recovery time tPROT_RECOVERY.
If the FLT terminal is externally pulled low, the unit will shut down
in the same manner as the other fault protections listed here.
When FLT fault is detected, the FLT_FALLING_EDGE bit will be set,
MFR_STATUS_FAULTS (F0h) status register, byte 1, bit 0.
DCM™ DC-DC Converter
Rev 1.5
Page 16 of 31 02/2021
End of Life
DCM3717S60E14G5TN0
High-Level Functional State Diagram
Conditions that cause state transitions are shown along arrows. Sub-sequence activities listed inside the state bubbles.
Application of
VIN
VIN > VIN_ADDR
DISABLED
tOFF
INITIALIZATION
SEQUENCE
Powertrain: Stopped
FLT = LOW
tADDR_DLY delay
Address Latched
EN = LOW,
FLT pulled LOW, or
Overtemperature Shut Down
Powertrain: Stopped
FLT = LOW
VIN > VIN_UVLO and
tADDR_DLY elapsed
STANDBY
Powertrain: Stopped
FLT = LOW
tOFF elapsed
EN = HIGH,
FLT HIGH,
tON elapsed, and
not Overtemperature
RUNNING
SOFT START
VOUT Ramp during tss
tSS elapsed
Powertrain: Active
FLT = OpenDrain
Regulates VOUT
Powertrain: Active
FLT = OpenDrain
VIN_UVLO, VIN_OVLO, VEAO_OL
or Output OVP
tPROT_RECOVERY
elapsed
SHUT DOWN of
Buck-Boost
STAGE 1
tPROT_RECOVERY
Powertrain: Stopped
FLT = LOW
VIN_UVLO, VIN_OVLO, VEAO_OL
%EAIN_HI, ISHORT or Output OVP
tOC_RECOVERY elapsed
or EN = LOW
IOL or Output OVP
SHUT DOWN of
Current Multiplier
STAGE 2
tOC_RECOVERY
Powertrain: Stopped
FLT = LOW
DCM™ DC-DC Converter
Rev 1.5
Page 17 of 31 02/2021
DCM™ DC-DC Converter
Rev 1.5
Page 18 of 31 02/2021
+INV
FLT
EAO
EN
IOUT
(A)
Output +OUT
Input
+IN
ISHORT
IOL
VOUT_OVP
VEAO_SKIP
VEAO_OL
VIN-ADDR
VIN-UVLO
VIN-OVLO
tON
tADDR_DLY
tSS
tOFF
tPROT
1
Start up from VIN
Fast VIN slew
tON
tSS
tOFF
tPROT
tON
tSS
tPROT
tOFF
tPROT_RECOVERY
tON
tSS
tPROT
tOFF
tPROT_RECOVERY
tON
tSS
tPROT
5
3
7
Shut down from
Restart from
Brief UVLO, shut down
2
FLT released
EN high
and restart
Shut down
6
8
4
from EN low
Brief OVLO, shut down
Line supply
Shut down
and restart
set to 0V
from FLT low
End of Life
DCM3717S60E14G5TN0
Timing Diagrams
Module inputs are shown in blue; module outputs are shown in brown.
DCM™ DC-DC Converter
Rev 1.5
Page 19 of 31 02/2021
+INV
FLT
EAO
EN
IOUT
(A)
Output +OUT
Input
+IN
ISHORT
IOL
tOC_RECOVERY
tON
tSS
tPROT
tPROT_RECOVERY tSS
tON
10
Shut down from
short circuit
tPROT_RECOVERY
tSS
Note 1
%EAIN_HI
tON
tPROT_ or
tOC_RECOVERY
tPROT
tEAO_OL
tON
12
Trim up max,
shut down
from OVP
11
Shut down from
overload
Notes:
1) Timing and +INV voltage influenced by whether Buck-Boost Stage 1 or SAC Stage 2 shuts down.
2) Case 9 depicts response when SAC Stage 2 detects fault
VOUT_LowTrim
VOUT_HighTrim
VOUT_OVP
VEAO_SKIP
VEAO_OL
VIN-ADDR
VIN-UVLO
VIN-OVLO
tIOC
9
Shut down from
overcurrent
%EAIN_HI
tEAIN_HI
tPROT_RECOVERY
tON
tSS
13
Trim from High to Low trim
with excess CLOAD,
shut down from %EAIN_HI
End of Life
DCM3717S60E14G5TN0
Timing Diagrams (Cont.)
Module inputs are shown in blue; module outputs are shown in brown.
End of Life
Design Guidelines
Input Filter case 2; inductive source and internal, external
input decoupling capacitance with significant RCIN_EXT ESR
(i.e., electrolytic type)
Input Filter Stability
Regulating switch-mode power supplies like the DCM present
a negative impedance to the voltage source that is powering
them. To ensure stability of the regulation loop, the source
impedance and the parasitic resistance and inductance of the
interconnect lines must be considered. The high performance
ceramic decoupling capacitors placed locally to the input to the
DCM are effective in controlling reflected ripple current at the
switching frequency. However their low ESR means they will not
significantly damp an excessively high impedance of an upstream
voltage source.
The regulator dynamic input impedance magnitude rEQ_IN can be
calculated by dividing the lowest line voltage by the full load input
current. To ensure stability, two cases must be considered.
Input Filter case 1; inductive source and local, external,
input decoupling capacitance with negligible ESR
(i.e., ceramic type)
The voltage source impedance can be modeled as a series RLINE
LLINE circuit. In order to guarantee stability the following conditions
must be verified:
RLINE >
LLINE
(CIN + CIN_EXT) • | rEQ_IN |
|
RLINE
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