efficiency optimization in data center - from packaging to...
TRANSCRIPT
Efficiency Optimization
In Data Center
- From Packaging to Solution
PwrSoC, 2018
Hsinchu
Presented by: Haoyi Ye
Delta Electronics
Delta ConfidentialPwrSoC 2018
Data Center Power Trend and Architecture
High Efficiency Power Packaging & Integration
Application Case: 48V Solution for Server
Contents
Delta ConfidentialPwrSoC 2018
AI
Image Recognition
NLP
Unmanned Vehicle
Industry 4.0
Smart City
AI is Changing the World
Cloud
Delta ConfidentialPwrSoC 2018
Data Center Power Architecture Evolution
More heterogeneous computing;
More high performance processors
The Challenges: Performance, Scalability, Diversity
Higher integration;Higher power density
DC/DC400V
DC
48VVRM
1VIC
AC/DC220V
AC
12VVRM
1VIC
AC/DC220V
AC
48VVRM
1VIC
Evolving and diversified power architecture
Delta ConfidentialPwrSoC 2018
Very flexible architecture
2-Stage Power Architecture for AI Processor
>20A
Vin6V Bus
0.6-2V
>100A
>20A
<2A
<2A
>3A
>3A
DC/DC module
Delta ConfidentialPwrSoC 2018
Low Voltage Bus for System Efficiency
-0.2%
DCDC module Efficiency @ 48Vin
Vo = 6V
Vo = 12V
DCDC module efficiency slightly drop from 12Vo to 6Vo
Buck efficiency significantly increase from 12Vin to 6Vin
Buck Efficiency (%) @ 1.8Vo
0 10 20 30 40 50 60 70 80 90 100 110
Load Current (A)
+1.7%
Vo = 4V
System Efficiency optimization by low voltage bus
Vin = 8V
Vin = 6V
Vin = 12V
Delta ConfidentialPwrSoC 2018
Data Center Power Trend and Architecture
High Efficiency Power Packaging & Integration
Application Case: 48V Solution for Server
Contents
Delta ConfidentialPwrSoC 2018
Buck Losses and Key Parameters
100m
R6
C9
10u
C8
10u
C7
10u
_
Q5_
Q6
C6
1u
C5
1u
_
Q1
_
Q2
450p
L2
440u
R1
C4
10u
_
Q4
_
Q3
1.2n
L4
1.2n
L5
100m
R7
Switch ringing loss
Loop inductance is the key parameter for buck efficiency
Body diode
conduction lossBody diode reverse
recovery loss
Delta ConfidentialPwrSoC 2018
Embedded DrMOS
Smaller loop inductance, lower switching loss
• Switching loop inductance: 50% decreasing
• Driver loop inductance: 50% decreasing
140u
R11
250p
L10
C10
1u
C11
1u
47m
R8
C12
10u
_
Q7_
Q8
C13
1u
C14
1u
_
Q9
_
Q10
C15
10u
_
Q11
_
Q12
600p
L8
600p
L9
47m
R10
450p
L7
440u
R9
C16
1u
C17
1u
Die
Embedded DrMOS100m
R6
C9
10u
C8
10u
C7
10u
_
Q5_
Q6
C6
1u
C5
1u
_
Q1
_
Q2
450p
L2
440u
R1
C4
10u
_
Q4
_
Q3
1.2n
L4
1.2n
L5
100m
R7
DrMOS
Die
Delta ConfidentialPwrSoC 2018
Efficiency improved at different frequency
30A Load
25A Load
Efficiency curve w/ different package
Efficiency Improvement (%)Efficiency (%)
Vin=12V
Vout=1.8V
Load(A)
Fs=2MHz
Efficiency Improvement
The higher fs or load current, the more improved
Fs(MHz)
+0.4%
Delta ConfidentialPwrSoC 2018
VRM Integration
High density integration of high performance device, packaging and magnetics
VIN
BST
SW
PGND
VIN
VOUT
2-Phase Buck Module
Vin 5 - 7.5V
Vo 0.8 – 1.8V
TDC 60A
Footprint 10*10mm
Height 10 mm
DrMOS
Delta ConfidentialPwrSoC 2018
Data Center Power Trend and Architecture
High Efficiency Power Packaging & Integration
Application Case: 48V Solution for Server
Contents
Delta ConfidentialPwrSoC 2018
2-Stage Solution for 48V Server
48V 6V
12V
Mainboard
High density VRM/PoL
Good efficiency
Good transient
response
Compact
footprint
Buck
CPU
DDR4
DDR4
PCH
Others
DCDC PCIe/HDD
500W
DCDC
Delta ConfidentialPwrSoC 2018
Proposal Placement
主板
48V
1.2V
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
DDR
1.2V
1.8V
DDR4
DDR4
Buck
Buck
Buck
Buck
Buck
Buck
Buck
Buck
6V
Narrow solution Closer to CPU
500W
DCDC
CPU
Delta ConfidentialPwrSoC 2018
23.78mm36.86mm
Reference
PDN
Proposed
PDN
PDN Modeling and Calculation
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
0 50 100 150 200
0.0%
0.1%
0.2%
0.3%
0.4%
0.5%
0.6%
0 50 100 150 200
Power saving
P(W)
I(A) I(A)
Eff. benefit
0.4%
@ 145A
0.5%
@175A
Minimum PDN losses, efficiency improvement
1W
@ 145A
1.5W
@175A
Rdc = 536uOhm Rdc = 489uOhm
Delta ConfidentialPwrSoC 2018
AI
IR
NLP
Unmanned Vehicle
Optimize AI Infra with Power Solution
Industry 4.0
Smart City
Cloud
Device level
Convertor level
System level
Smarter. Greener.
Together.
Your questions?
To learn more about Delta, please visit
www.deltaww.com.