48 V Bus Converter

Innovative 48V Direct Conversion
APEC 2016
Novel 48V Direct Conversion
Innovative 48V Direct Conversion Architecture
Fully Compliant to Intel VR13 Requirements
Fully Isolated, Scalable, High Efficiency (ZVS,
ZCS), Energy Proportional Ideal for “Any POL”
Flexible Architecture Extendable to 400V Direct
Conversion Bus
Innovative 48V Direct Conversion
VIN
LRES
L1
VIN
COUT
L2
LOAD
STRG02
STRG04
CR
SECONDARY
VSEC1
PHX
FULL BRIDGE DRIVER
Cell
PHY
N:1
VSEC2
START
CDC
ISOLATION
PWMY
System
Description
PWMX
Main
Features
STRG06
IOUT
DIGITAL POWER
CONTROLLER
VOUT
& TELEMETRY HUB
RGND
Experimental
Intel VR13
Results
Available
Reference
Designs
System Description
Innovative, Isolated 48V to 0.5V-12V Architecture
• STRG02 Single wire controlled
VIN
LRES
CR
STRG02
STRG04
Driver with programmable
predictive control for zero voltage
operations in constant phase shift
control
PHX
FULL BRIDGE DRIVER
• STRG04 100V Full Bridge
L1
VSEC1
VIN
COUT
L2
PHY
N:1
VSEC2
START
CDC
• STRG06 Multiphase Resonant
PWMY
ISOLATION
Constant On Time Digital
Controller supporting up to 6
interleaved converters
(automatically turned on/off by load
request) with PMBUS and output
voltage between 0.5V to 12V
SECONDARY
voltage and zero current working
LOAD
Synchronous Rectifier able to zero
PWMX
STRG06
IOUT
DIGITAL POWER
CONTROLLER
VOUT
& TELEMETRY HUB
RGND
• Isolated Resonant Direct Conversion
•
Main Features
from 48V to VCORE(1.xV) / VDDR(1.2V) / VSOC(1V) / VIBC(12V, 5V, 3.3V)
• Efficiency
•
ZVS and ZCS at any Vin [36V – 72V] and Vout [1.xV – 12V]
•
Energy Proportional Management  Pskip and Dynamic Cell Management
•
No Active Clamps needed
New Resonant Topology
Energy Proportional
• Scalable and Flexible
•
Converters paralleled and interleaved
•
Scalability according to the power demand
•
Variable Frequency in CCM and DCM
•
Instantaneous turn-on of resonant converters when load increases
Scalable
Digital Load and IBC
• Any Digital Load
•
High Bandwidth
•
Easy to compensate as a non isolated Buck converter
•
Up and down reference transitions  Sink mode required
Power Density
Telemetry, Auto-Tuning
• High Power Density, Telemetry, Auto-Tuning
•
>160W/inch2
•
Fully configurable and accessible through PMBusTM
•
To minimize time and effort for compensation, optimizing application design time
Intel VR13 Reference Design
Intel VR13 165W CPU Power Delivery
Features:
• Compliancy to VR13 165W CPU
• Minimal PCB area with 4 cells
• Efficiency peak 91%, flat until TDC (88A)
• Integrated magnetics
• MLCC output filter
Bill of materials:
• Magnetic electrical data:
• Transformer turn ratio=5
• Lres=1.9uH
• Lout=120nH
• Cres: 2 x 100nF between phases, 33nF
from each phase to GND
• Cout: 120 x MLCC 47uF 4V 0805
Intel VR13 Efficiency Performances
100
1
•
•
•
0.95
97
4 cells voltage regulator for VR13 165W
DPM enabled w/ IM rev X1
4th Cell enable in Turbo Mode (>TDC)
0.9
93
0.85
90
Efficiency Converter at Remote Sense
0.8
86
Efficiency at Remote Sense
Efficiency at Bulks
0.75
82
0.7
0
8
16
24
32
40
48
56
64
72
80
88
96 104 112 120 128 136 144 152 160 168 176 184 192 200 208 216 224
54V  12V, 500W
Prototype spec:
Vin
40V to 72V
Vin nom
54V
Vout nom
12V +/-1%
Po
500W
Output current
42A
Frequency of operation
200-250KHz
Power density
160W/inch2
Actual Peak Efficiency
97%
Load regulation
<0.1%
Line regulation
<0.1%
Board size
1.8 x 1.8 inch2
54V  3.3V, 150W (Prototype)
Prototype spec:
Vin
40V to 72V
Vin nom
54V
Vout nom
3.3V +/-1%
Po
150W
Output current
44A
Frequency of operation
250KHz
Power density
160W/inch2
Actual Peak Efficiency
95%
Load regulation
<0.1%
Line regulation
<0.1%
Board size
3.3 x 0.9 inch2
54V  1.21V, 50W (Prototype)
Efficiency 54V --> 1.21V
100
98
2
Cells
1 Cell
96
• Dual Cell Design:
54V to 1.2V
• 50A TDC at 1.21V
Efficiency (%)
94
92
90
88
86
• 93.8% Peak Efficiency
84
82
80
0
10
20
30
Output Current (A)
40
50
60
Similar pages