VRM10.1 XPhaseTM/DirectFETTM High Efficiency Demo Board ...
VRM10.1 XPhaseTM/DirectFETTM High Efficiency Demo Board ...
VRM10.1 XPhaseTM/DirectFETTM High Efficiency Demo Board ...
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<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
7KLVSUHOLPLQDU\GHPRQRWHFRUUHVSRQGVWR'%&UHYERDUGV<br />
DESCRIPTION<br />
This VRM10 2U demo board consists of International Rectifier XPhase TM controller set<br />
(IR3081 / IR3087) and the power stage with DirectFET TM (IR6608 / IR6618). XPhase TM control<br />
architecture makes it easy to change the number of synchronous buck converter to meet<br />
different design requirements. The demo board meets the requirements of Intel Voltage<br />
Regulator Module (VRM) 10.1 Design Guideline.<br />
Page 1 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
FEATURES<br />
• XPhase TM architecture – Current configuration is 6 phases on the demo board, but is can be<br />
modified to use for 1- to 5-phase operations.<br />
• Feed forward voltage mode control<br />
• Accurate current sharing through active average current share bus<br />
• Loss-less current sensing using inductor DCR<br />
• Temperature compensation of the inductor DCR change<br />
• Programmable adaptive voltage positioning<br />
• Programmable Dynamic VID slew rate, set at 2.5mV/us<br />
• +/-300mV differential remote voltage sense<br />
• 400kHz constant frequency operation (can be modifed for 150kHz to 1MHz operations)<br />
• Programmable softstart<br />
• Body Braking TM disables synchronous MOSFET for improved transient response and<br />
prevents negative output voltage at converter turn-off<br />
• Body Braking TM can be used to prevents discharge of output capacitors during Dynamic VID<br />
step-down (this feature is disabled by default)<br />
• Programmable hiccup over-current protection with delay to prevent false triggering<br />
• Over voltage protection<br />
• Operates from 12V input with 9.1V Under-Voltage Lockout<br />
• Simplified powergood provides indication of proper operation and avoids false triggering<br />
• Programmable converter over-temperature detection and output<br />
• Adjustable MOSFET drive voltage (8.2V in the demo board)<br />
• Phase fault detection<br />
• Back-bias protection: starts up safely when output voltage is asserted before powering up<br />
• LL0 & LL1 provisions (disabled, pending Intel definition)<br />
Page 2 1/16/2004
SPECIFICATIONS<br />
Absolute Maximum Rating<br />
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
Test Condition: 25°C<br />
Input/Output Name Minimum Maximum Units<br />
12V Input -0.3 14 V<br />
Load Current 0 150 A<br />
Performance<br />
Test Conditions: 25°C, 400 LFM air flow, 10.8V < Vin < 13.2V<br />
Parameter Test Conditions Minimum Typical Maximum Units<br />
Vcore<br />
Output Voltage DAC = 101001, Io=0A 1.310 1.330 1.350 V<br />
Output Voltage DAC = 101001, Io=100A 1.220 1.240 1.260 V<br />
Output Voltage DAC = 101001, Io=120A 1.200 1.220 1.240 V<br />
Vout Peak Transient Step between 0A and 80A<br />
100 120 mVpk<br />
Response<br />
@200A/µsec.<br />
Output Ripple Io=100A 5 10 mVp-p<br />
Current Sharing<br />
Between Phases<br />
2.0 5.0 A<br />
Difference between the<br />
phases with highest and<br />
lowest current @100A<br />
load<br />
Converter <strong>Efficiency</strong> DAC=101001, Io=120A, 87.0 88.0 %<br />
airflow=400LFM @ 35C<br />
Switching Frequency 350 400 450 kHz<br />
Soft Start Time VCCP from 0V to 1.234V, 0.8 1 ms<br />
Io=100A<br />
Power Good Delay DAC=101001, Io=100A 1.5 2 ms<br />
Over-Current Threshold Normal operating temp. 135 150 A<br />
General<br />
+12V UVLO Start<br />
8.60 9.10 9.60 V<br />
Voltage of Control IC<br />
+12V UVLO Stop<br />
8.40 8.90 9.40 V<br />
Voltage of Control IC<br />
VBIAS Voltage 6.60 6.85 7.10 V<br />
Linear Regulator Output<br />
for MOSFET Driver<br />
7.0 7.6 8.2 V<br />
Page 3 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
Intel VRM10 COMPATIBLE 6-Bit VID<br />
Processor Pins (0 = low, 1 = high) Vout Processor Pins (0 = low, 1 = high) Vout<br />
VID4 VID3 VID2 VID1 VID0 VID5 (V) VID4 VID3 VID2 VID1 VID0 VID5 (V)<br />
0 1 0 1 0 0 0.8375 1 1 0 1 0 0 1.2125<br />
0 1 0 0 1 1 0.8500 1 1 0 0 1 1 1.2250<br />
0 1 0 0 1 0 0.8625 1 1 0 0 1 0 1.2375<br />
0 1 0 0 0 1 0.8750 1 1 0 0 0 1 1.2500<br />
0 1 0 0 0 0 0.8875 1 1 0 0 0 0 1.2625<br />
0 0 1 1 1 1 0.9000 1 0 1 1 1 1 1.2750<br />
0 0 1 1 1 0 0.9125 1 0 1 1 1 0 1.2875<br />
0 0 1 1 0 1 0.9250 1 0 1 1 0 1 1.3000<br />
0 0 1 1 0 0 0.9375 1 0 1 1 0 0 1.3125<br />
0 0 1 0 1 1 0.9500 1 0 1 0 1 1 1.3250<br />
0 0 1 0 1 0 0.9625 1 0 1 0 1 0 1.3375<br />
0 0 1 0 0 1 0.9750 1 0 1 0 0 1 1.3500<br />
0 0 1 0 0 0 0.9875 1 0 1 0 0 0 1.3625<br />
0 0 0 1 1 1 1.0000 1 0 0 1 1 1 1.3750<br />
0 0 0 1 1 0 1.0125 1 0 0 1 1 0 1.3875<br />
0 0 0 1 0 1 1.0250 1 0 0 1 0 1 1.4000<br />
0 0 0 1 0 0 1.0375 1 0 0 1 0 0 1.4125<br />
0 0 0 0 1 1 1.0500 1 0 0 0 1 1 1.4250<br />
0 0 0 0 1 0 1.0625 1 0 0 0 1 0 1.4375<br />
0 0 0 0 0 1 1.0750 1 0 0 0 0 1 1.4500<br />
0 0 0 0 0 0 1.0875 1 0 0 0 0 0 1.4625<br />
1 1 1 1 1 1 OFF 1 0 1 1 1 1 1 1.4750<br />
1 1 1 1 1 0 OFF 1 0 1 1 1 1 0 1.4875<br />
1 1 1 1 0 1 1.1000 0 1 1 1 0 1 1.5000<br />
1 1 1 1 0 0 1.1125 0 1 1 1 0 0 1.5125<br />
1 1 1 0 1 1 1.1250 0 1 1 0 1 1 1.5250<br />
1 1 1 0 1 0 1.1375 0 1 1 0 1 0 1.5375<br />
1 1 1 0 0 1 1.1500 0 1 1 0 0 1 1.5500<br />
1 1 1 0 0 0 1.1625 0 1 1 0 0 0 1.5625<br />
1 1 0 1 1 1 1.1750 0 1 0 1 1 1 1.5750<br />
1 1 0 1 1 0 1.1875 0 1 0 1 1 0 1.5875<br />
1 1 0 1 0 1 1.2000 0 1 0 1 0 1 1.6000<br />
Note1: Fault mode, error amplifier output disabled.<br />
Page 4 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
TEST POINTS and CONNECTORS<br />
LDO for<br />
Gate drivers<br />
GND<br />
Test points<br />
Input voltage<br />
measurement points<br />
LL0/LL1<br />
GND<br />
Phase Ramp<br />
IShare Bus<br />
EA out<br />
Phase<br />
IC #6<br />
Phase<br />
IC #1<br />
Control<br />
IC<br />
Output Connectors<br />
Control<br />
Output voltage<br />
measurement points<br />
lines<br />
Input lines<br />
Fig.1: Test Points and Connectors of DB3C<br />
Page 5 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
SCHEMATIC<br />
Control IC Circuit<br />
VIN+<br />
R103<br />
2<br />
No Stuf f<br />
VIN+<br />
U2<br />
No Stuf f<br />
R114<br />
No Stuf f<br />
U3<br />
No Stuf f<br />
R116<br />
No Stuf f<br />
D1<br />
No Stuf f<br />
D2<br />
No Stuf f<br />
1<br />
Q2 CZT2222A<br />
R104<br />
2<br />
1.0k<br />
Q1 No Stuf f<br />
1<br />
C105<br />
No Stuf f<br />
R113<br />
No Stuf f<br />
C109<br />
No Stuf f<br />
R115<br />
No Stuf f<br />
2<br />
1<br />
D2A<br />
CMDZ8L2<br />
1<br />
BOOST SW 6<br />
2<br />
3<br />
C106<br />
No Stuf f<br />
1<br />
BOOST SW 6<br />
2<br />
3<br />
GND<br />
FB<br />
GND<br />
FB<br />
2<br />
1<br />
VIN 5<br />
SHDN 4<br />
VIN 5<br />
SHDN 4<br />
D1A<br />
No Stuf f<br />
C110<br />
No Stuf f<br />
Optional LDO<br />
Gate Driver<br />
C107<br />
No Stuf f<br />
7.6V<br />
R119<br />
0<br />
Join VGH and VGL<br />
if only one regulator<br />
C108<br />
4.7uF<br />
D3<br />
No Stuf f<br />
VGL<br />
7.6V<br />
VGH<br />
L1<br />
No Stuf f<br />
VIN+ 1 2<br />
Gate Driver<br />
D4<br />
No Stuf f Sw itching<br />
Regulator.<br />
Optional for<br />
<strong>High</strong><br />
Frequency<br />
D5 Applications<br />
No Stuf f<br />
VGL<br />
L2<br />
VIN+ 1 2<br />
No Stuf f<br />
D6<br />
No Stuf f<br />
VGH<br />
SS<br />
Vcc_PWRGD<br />
VID5<br />
VID0<br />
VID1<br />
VID2<br />
VID3<br />
VID4<br />
OUTEN<br />
U1<br />
IR3081<br />
C2<br />
R18<br />
0.1uF 14k<br />
1<br />
2<br />
NC<br />
3<br />
VID5<br />
4<br />
VID0<br />
5<br />
VID1<br />
6<br />
VID2<br />
7<br />
VID3<br />
VID4<br />
TRM1<br />
TRM2<br />
VOSNS-<br />
TRM3<br />
TRM4<br />
ROSC<br />
VDAC<br />
VO_SEN-<br />
TP5<br />
GND<br />
1<br />
C17<br />
1nF<br />
ENABLE 28<br />
TP6<br />
GND<br />
1<br />
8<br />
9<br />
NC 27<br />
PWRGD 26<br />
25<br />
24<br />
SS/DEL<br />
VCC 22 LGND 23<br />
RMPOUT<br />
10<br />
11<br />
12<br />
13<br />
14<br />
R10<br />
330k<br />
TP7<br />
GND<br />
1<br />
ROSC<br />
VBIAS 21<br />
BBFB 20<br />
19<br />
EAOUT<br />
FB 18<br />
VDRP 17<br />
IIN 16<br />
15<br />
OCSET OCSET<br />
R1<br />
30.1k<br />
C9<br />
330pF<br />
TP8<br />
GND<br />
1<br />
R2<br />
20<br />
C1<br />
10nF<br />
R3<br />
14.7k<br />
Vcc<br />
C3<br />
0.1uF<br />
TP3<br />
Ishare<br />
1<br />
R4 10<br />
VDRP<br />
Optional for<br />
Dynamic VID<br />
R6A<br />
C4<br />
0.1uF<br />
BBFB<br />
R8 No Stuf f<br />
R109<br />
No Stuf f No Stuf f<br />
R108<br />
No Stuf f<br />
C104<br />
R6<br />
953 ohm<br />
C7<br />
No Stuf f<br />
Q6<br />
2N7002<br />
No Stuf f<br />
No Stuf f<br />
R105<br />
0<br />
R112<br />
No Stuf f<br />
R111<br />
No Stuf f<br />
FB<br />
C5<br />
R107<br />
No Stuf f<br />
R5<br />
Q5<br />
2N7002<br />
No Stuf f<br />
TP2<br />
RMP<br />
C101<br />
No Stuf f<br />
C103<br />
No Stuf f<br />
47p<br />
1<br />
C102 No Stuf f<br />
R110<br />
No Stuf f<br />
R7 No Stuf f<br />
R9 4.02k C6 22nF<br />
R106<br />
0<br />
C8<br />
820p<br />
No Stuf f<br />
RT<br />
No Stuf f<br />
249 ohm<br />
TP1<br />
EA<br />
1<br />
RT1<br />
No Stuf f<br />
R5A<br />
No Stuf f<br />
Load_current<br />
VDAC<br />
RMP<br />
VIN+<br />
VBIAS<br />
EA<br />
Voltage Loop<br />
Compensation<br />
Optional for Inductor<br />
Temperature<br />
Compensation<br />
R4A<br />
No Stuf f<br />
VO_SEN+<br />
Q4<br />
2N7002<br />
No Stuff<br />
R3A<br />
No Stuf f<br />
Q3<br />
Vcc<br />
LL0<br />
2N7002<br />
No Stuf f<br />
R3B<br />
No Stuf f<br />
Droop = 0.91m<br />
LL0 can be used to change<br />
the offset (disabled)<br />
VRM Connector<br />
EA<br />
LL0<br />
R117<br />
No Stuf f<br />
VIN+<br />
62<br />
VIN+<br />
VIN-<br />
61<br />
VIN+<br />
VIN-<br />
60<br />
VIN+<br />
VIN-<br />
59<br />
Reserv ed Reserv ed<br />
58<br />
VR_hot# VRM_pres#<br />
57<br />
VID4<br />
Key<br />
56<br />
VID3<br />
VID2<br />
55<br />
VID1<br />
VID0<br />
54<br />
Load_current VID5<br />
Vcc_PWRGD OUTEN 53<br />
52<br />
VO_SEN- VO_SEN+<br />
51<br />
Reserv ed Reserv ed<br />
50<br />
VO-<br />
VO+<br />
49<br />
VO+<br />
VO+<br />
48<br />
VO-<br />
VO-<br />
47<br />
VO+<br />
VO+<br />
46<br />
VO-<br />
VO-<br />
45<br />
VO+<br />
VO+<br />
44<br />
VO-<br />
VO-<br />
43<br />
VO+<br />
VO+<br />
42<br />
VO-<br />
VO-<br />
41<br />
VO+<br />
VO+<br />
40<br />
VO-<br />
VO-<br />
39<br />
VO+<br />
VO+<br />
38<br />
VO-<br />
VO-<br />
37<br />
VO+<br />
VO+<br />
36<br />
VO-<br />
VO-<br />
35<br />
VO+<br />
VO+<br />
34<br />
VO-<br />
VO-<br />
33<br />
VO+<br />
VO+<br />
32<br />
VO-<br />
VO-<br />
VR_hot#<br />
VID4<br />
VID3<br />
VID1<br />
Load_current<br />
Vcc_PWRGD<br />
VO_SEN-<br />
VO+<br />
EA1<br />
1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
7<br />
8<br />
9<br />
10<br />
11<br />
12<br />
13<br />
14<br />
15<br />
16<br />
17<br />
18<br />
19<br />
20<br />
21<br />
22<br />
23<br />
24<br />
25<br />
26<br />
27<br />
28<br />
29<br />
30<br />
31<br />
J1 Connector<br />
R117 and R118 are for<br />
parallel connection of two VRMs<br />
VO+<br />
SS1<br />
R118<br />
No Stuf f<br />
VID2<br />
VID0<br />
VID5<br />
OUTEN<br />
VO_SEN+<br />
LL1<br />
SS<br />
Page 6 1/16/2004
6<br />
7<br />
8<br />
9<br />
6<br />
7<br />
8<br />
9<br />
6<br />
7<br />
8<br />
9<br />
6<br />
7<br />
8<br />
9<br />
6<br />
7<br />
8<br />
9<br />
6<br />
7<br />
8<br />
9<br />
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
Phase IC Circuit<br />
VGH<br />
VIN+<br />
Vcc_PWRGD<br />
VDAC<br />
VBIAS<br />
RMP<br />
VR_hot#<br />
Load_current<br />
EA<br />
No Stuf f<br />
R121<br />
R123 0<br />
R11 20.0k<br />
R124<br />
20.0k<br />
R14<br />
R125<br />
7.15k<br />
R122<br />
VGH<br />
VIN+<br />
No Stuf f<br />
22k<br />
R12<br />
5.36k<br />
If using IR3086:<br />
R121=open, R122=open, R123=0<br />
If using IR3087:<br />
R121=20.0K, R122=TBD, R123=open<br />
(set R121=0 to disable OptiPhase)<br />
R19<br />
No Stuf f<br />
C111<br />
0.1uF<br />
1<br />
2<br />
3<br />
4<br />
5<br />
C112<br />
10uF<br />
ISHARE<br />
BIASIN 20<br />
RMPIN+<br />
CSIN-<br />
RMPIN-<br />
HOTSET<br />
VRHOT<br />
C13<br />
22nF<br />
SCOMP<br />
DACIN 19<br />
EAIN<br />
18<br />
C113<br />
10uF<br />
OPTIPHS<br />
U10<br />
IR3086<br />
PWMRMP<br />
17<br />
LGND<br />
16<br />
CSIN+<br />
GATEH 14<br />
10<br />
C12<br />
220pF<br />
C115<br />
No Stuf f<br />
VCCH 15<br />
PGND 13<br />
GATEL<br />
VCCL<br />
VCC<br />
C14<br />
0.1uF<br />
12<br />
11<br />
D11<br />
MBR0530<br />
C16<br />
GH1<br />
D21<br />
MBR0530<br />
0.1uF<br />
U12<br />
IRF6618<br />
GL1<br />
C15<br />
0.1uF<br />
R13 16.9k<br />
VGL<br />
VIN+<br />
PCB footprint for<br />
6608 is ST (small can),<br />
6607 is MT (medium can)<br />
U11<br />
IRF6608<br />
SW1<br />
D12<br />
No Stuf f<br />
R15<br />
10.0k<br />
R16<br />
6.19k<br />
1 2<br />
L11 220nH<br />
C18<br />
No Stuf f<br />
R17<br />
No Stuf f<br />
C11<br />
47nF<br />
C114<br />
10uF<br />
Vcc_PWRGD<br />
VDAC<br />
VBIAS<br />
C10 RMP<br />
100pF<br />
VO+<br />
No Stuf f<br />
R421<br />
R423 0<br />
R424<br />
20.0k<br />
Phase ICs can be IR3086, 3087, or 3088.<br />
Pin 18 is PhaseFault for IR3086,<br />
OptiPhase for IR3087.<br />
IR3088 is same as IR3086 except<br />
for no OVP function.<br />
R425<br />
7.15k<br />
EA<br />
VGH<br />
VIN+<br />
R422<br />
VR_hot#<br />
VGH<br />
VIN+<br />
No Stuf f<br />
R44<br />
R41 20.0k<br />
Load_current<br />
R42<br />
14.3k<br />
22k<br />
R49<br />
No Stuf f<br />
C411<br />
0.1uF<br />
1<br />
2<br />
3<br />
4<br />
5<br />
C43<br />
22nF<br />
C412<br />
10uF<br />
ISHARE<br />
BIASIN 20<br />
RMPIN+<br />
CSIN-<br />
RMPIN-<br />
HOTSET<br />
VRHOT<br />
SCOMP<br />
DACIN 19<br />
U40<br />
IR3086<br />
EAIN<br />
18<br />
C413<br />
10uF<br />
OPTIPHS<br />
PWMRMP<br />
17<br />
C44<br />
LGND<br />
16<br />
C42<br />
220pF<br />
CSIN+<br />
GATEH 14<br />
10<br />
C415<br />
No Stuf f<br />
VCCH 15<br />
PGND 13<br />
GATEL<br />
VCCL<br />
VCC<br />
0.1uF<br />
12<br />
11<br />
D41<br />
MBR0530<br />
C46<br />
GH4<br />
C45<br />
0.1uF<br />
R43 16.9k<br />
U42<br />
IRF6618<br />
GL4<br />
VGL<br />
VIN+<br />
D51<br />
MBR0530<br />
0.1uF<br />
U41<br />
IRF6608<br />
SW4<br />
D42<br />
No Stuf f<br />
R46<br />
6.19k<br />
R45 C41<br />
10.0k 47nF<br />
VO+<br />
1 2<br />
L41 220nH<br />
C414<br />
C48<br />
No Stuf f 10uF<br />
R47<br />
No Stuf f<br />
C40<br />
100pF<br />
Vcc_PWRGD<br />
VDAC<br />
VBIAS<br />
RMP<br />
No Stuf f<br />
R221<br />
R223 0<br />
R224<br />
20.0k<br />
R225<br />
7.15k<br />
R21 20.0k<br />
VR_hot#<br />
Load_current<br />
EA<br />
R222<br />
No Stuf f<br />
R24<br />
R22<br />
34.0k<br />
22k<br />
C211<br />
0.1uF<br />
1<br />
2<br />
3<br />
4<br />
5<br />
C212<br />
10uF<br />
ISHARE<br />
BIASIN 20<br />
RMPIN+<br />
CSIN-<br />
RMPIN-<br />
HOTSET<br />
VRHOT<br />
SCOMP<br />
DACIN 19<br />
EAIN<br />
C213<br />
10uF<br />
OPTIPHS 18<br />
U20<br />
IR3086<br />
PWMRMP<br />
17<br />
C24<br />
LGND<br />
16<br />
CSIN+<br />
GATEH 14<br />
10<br />
C215<br />
No Stuf f<br />
VCCH 15<br />
PGND 13<br />
GATEL<br />
VCCL<br />
VCC<br />
12<br />
11<br />
C26<br />
GH2<br />
U22<br />
IRF6618<br />
GL2<br />
VGL<br />
C25<br />
0.1uF<br />
0.1uF<br />
U21<br />
IRF6608<br />
SW2<br />
D22<br />
No Stuf f<br />
R25<br />
10.0k<br />
1 2<br />
L21 220nH<br />
C28<br />
No Stuf f<br />
R27<br />
No Stuf f<br />
R26<br />
6.19k<br />
C21<br />
47nF<br />
C214<br />
10uF<br />
VO+<br />
Vcc_PWRGD<br />
VDAC<br />
C20 VBIAS<br />
100pF RMP<br />
No Stuf f<br />
R521<br />
R523 0<br />
R524<br />
20.0k<br />
R525<br />
7.15k<br />
VR_hot#<br />
R522<br />
Load_Current<br />
EA<br />
No Stuf f<br />
R54<br />
R51 20.0k<br />
R52<br />
34.0k<br />
22k<br />
C511<br />
0.1uF<br />
1<br />
2<br />
3<br />
4<br />
5<br />
C512<br />
10uF<br />
ISHARE<br />
BIASIN 20<br />
RMPIN+<br />
CSIN-<br />
RMPIN-<br />
HOTSET<br />
VRHOT<br />
SCOMP<br />
DACIN 19<br />
C513<br />
10uF<br />
U50<br />
IR3086<br />
EAIN<br />
OPTIPHS 18<br />
PWMRMP<br />
17<br />
C54<br />
LGND<br />
16<br />
CSIN+<br />
GATEH 14<br />
10<br />
C515<br />
No Stuf f<br />
VCCH 15<br />
PGND 13<br />
GATEL<br />
VCCL<br />
VCC<br />
12<br />
11<br />
C56<br />
GH5<br />
C55<br />
0.1uF<br />
0.1uF<br />
U52<br />
IRF6618<br />
GL5<br />
VGL<br />
U51<br />
IRF6608<br />
SW5<br />
D52<br />
No Stuf f<br />
R56<br />
6.19k<br />
R55 C51<br />
10.0k 47nF<br />
VO+<br />
1 2<br />
L51 220nH<br />
C514<br />
C58<br />
No Stuf f 10uF<br />
R57<br />
No Stuf f<br />
C50<br />
100pF<br />
R29<br />
No Stuf f<br />
C23<br />
22nF<br />
0.1uF<br />
VIN+<br />
C22 R23 16.9k<br />
220pF<br />
R59<br />
No Stuf f<br />
C53<br />
22nF<br />
0.1uF VIN+<br />
C52 R53 16.9k<br />
220pF<br />
VGH<br />
VIN+<br />
D31<br />
MBR0530<br />
VGH<br />
VIN+<br />
D61<br />
MBR0530<br />
No Stuf f No Stuf f<br />
R321 R322<br />
Vcc_PWRGD R323 0<br />
VDAC<br />
VBIAS<br />
R34<br />
RMP<br />
R31 20.0k<br />
R32<br />
R324<br />
14.3k<br />
20.0k<br />
R325<br />
7.15k<br />
VR_hot#<br />
Load_current<br />
EA<br />
22k<br />
C311<br />
0.1uF<br />
1<br />
2<br />
3<br />
4<br />
5<br />
C312<br />
10uF<br />
ISHARE<br />
BIASIN 20<br />
RMPIN+<br />
CSIN-<br />
RMPIN-<br />
HOTSET<br />
VRHOT<br />
SCOMP<br />
DACIN 19<br />
C313<br />
10uF<br />
U30<br />
IR3086<br />
EAIN<br />
18<br />
OPTIPHS<br />
PWMRMP<br />
17<br />
C34<br />
LGND<br />
16<br />
CSIN+<br />
GATEH 14<br />
10<br />
C315<br />
No Stuf f<br />
VCCH 15<br />
PGND 13<br />
GATEL<br />
VCCL<br />
VCC<br />
12<br />
11<br />
C36<br />
GH3<br />
U32<br />
IRF6618<br />
GL3<br />
VGL<br />
C35<br />
0.1uF<br />
0.1uF<br />
R36<br />
6.19k<br />
R35 C31<br />
U31<br />
IRF6608<br />
10.0k 47nF<br />
VO+<br />
SW3 1 2<br />
L31 220nH<br />
C314<br />
C38<br />
No Stuf f 10uF<br />
R37<br />
No Stuf f<br />
D32<br />
No Stuf f<br />
No Stuf f No Stuf f<br />
R621 R622<br />
Vcc_PWRGD R623 0<br />
VDAC<br />
C30 VBIAS<br />
R64<br />
100pF RMP<br />
R61 20.0k<br />
R62<br />
R624<br />
5.36k<br />
20.0k<br />
R625<br />
7.15k<br />
VR_hot#<br />
Load_current<br />
EA<br />
22k<br />
C611<br />
0.1uF<br />
1<br />
2<br />
3<br />
4<br />
5<br />
C612<br />
10uF<br />
ISHARE<br />
BIASIN 20<br />
RMPIN+<br />
CSIN-<br />
RMPIN-<br />
HOTSET<br />
VRHOT<br />
SCOMP<br />
DACIN 19<br />
U60<br />
IR3086<br />
EAIN<br />
18<br />
C613<br />
10uF<br />
OPTIPHS<br />
PWMRMP<br />
17<br />
C64<br />
LGND<br />
16<br />
CSIN+<br />
GATEH 14<br />
10<br />
C615<br />
No Stuf f<br />
VCCH 15<br />
PGND 13<br />
GATEL<br />
VCCL<br />
VCC<br />
12<br />
11<br />
C66<br />
GH6<br />
U62<br />
IRF6618<br />
GL6<br />
VGL<br />
C65<br />
0.1uF<br />
0.1uF<br />
R66<br />
6.19k<br />
R65 C61<br />
U61<br />
IRF6608<br />
10.0k 47nF<br />
VO+<br />
SW6 1 2<br />
L61 220nH<br />
C614<br />
C68<br />
No Stuf f 10uF<br />
R67<br />
No Stuf f<br />
D62<br />
No Stuf f<br />
C60<br />
100pF<br />
R39<br />
No Stuf f<br />
C33<br />
22nF<br />
0.1uF VIN+<br />
C32 R33 16.9k<br />
220pF<br />
R69<br />
No Stuf f<br />
C63<br />
22nF<br />
0.1uF VIN+<br />
C62 R63 16.9k<br />
220pF<br />
Page 7 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
Switching Waveforms<br />
Switch Nodes and Output Voltage waveforms at Steady State with zero load and 76A: (Phase firing<br />
sequence is 1-3-5-2-4-6)<br />
Page 8 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
LOAD LINE<br />
The follow chart shows load lines of the VRM10 2U demo board with various configurations. (4-, 5- and<br />
6-phases, frequency from 300KHz to 500KHz)<br />
Test conditions: Vin=12V, VDAC=1.35V, Airflow=400LFM at room temperature<br />
1.34<br />
1.32<br />
1.30<br />
1.28<br />
VRM 2U Load Line<br />
Vout_max<br />
Vout_min<br />
L02A (5-phase, 400K)<br />
L02B (5-phase, 500K)<br />
R406 (6-phase, 400K)<br />
R410 (6-phase, 413K)<br />
R401 (4-phase, 300K)<br />
R411 (6-phase, 395K)<br />
R412 (6-phase, 410K)<br />
R415 (6-phase, 410K)<br />
1.26<br />
1.24<br />
1.22<br />
1.20<br />
0 20 40 60 80 100 120<br />
As per <strong>VRM10.1</strong> specifications, the nominal output voltage at zero load is offset at 20mV below VDAC,<br />
and the slope of the droop line is set at -0.91mili-ohm.<br />
The offset can be adjusted by changing the value of R5, while the slope can be adjusted by changing the<br />
ratio of R6 and R5.<br />
It is necessary to adjust R5 and R6 if the demo board is modified for different switching frequencies,<br />
number of phases, or type of output inductors.<br />
Page 9 1/16/2004
EFFICIENCY of VRM<br />
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
The following chart shows the efficiency of the VRM10 2U demo board with various<br />
configurations (5- and 6-phase, frequency from 400KHz to 1MHz). Note that the efficiency data<br />
are measured on the demo board, and does not include losses from VRM connector. Refer to<br />
figure 1 for the measurement points for input and output voltages.<br />
Test conditions: Vin=12V, VDAC=1.35V, Airflow=400LFM at room temperature.<br />
0.90<br />
0.89<br />
0.88<br />
0.87<br />
0.86<br />
0.85<br />
0.84<br />
0.83<br />
0.82<br />
0.81<br />
0.80<br />
0.79<br />
0.78<br />
0.77<br />
0.76<br />
0.75<br />
<strong>Efficiency</strong> vs. Load Current<br />
R415A (5-phase, 1.02MHz)<br />
R415A (5-phase, 810KHz)<br />
R415A (5-phase, 600KHz)<br />
R415A (5-phase, 410KHz)<br />
R407A (6-phase, 415KHz)<br />
R407A (6-phase, 1.02MHz)<br />
0 10 20 30 40 50 60 70 80 90 100 110 120 130<br />
As can be observed from the above chart:<br />
• <strong>Efficiency</strong> is better when operating at lower frequency (400KHz)<br />
• The 6-phase, 400KHz version gives best efficiency at full-load, while the 5-phase,<br />
400KHz version gives better efficiency at half-load.<br />
Page 10 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
POWER LOSS of VRM<br />
The total power loss of the VRM is a better index on how much power can be delivered by this<br />
demo board. It is affected by switching frequency, number of phases, gate driver voltage, etc.<br />
36<br />
34<br />
32<br />
30<br />
28<br />
26<br />
24<br />
22<br />
20<br />
18<br />
16<br />
14<br />
12<br />
10<br />
8<br />
6<br />
4<br />
Total Power Loss vs. Load Current<br />
R415A (5-phase, 1.02MHz)<br />
R415A (5-phase, 810KHz)<br />
R415A (5-phase, 610KHz)<br />
R415A (5-phase, 410KHz)<br />
R407A (6-phase, 1.02MHz)<br />
R407A (6-phase, 415KHz)<br />
0 10 20 30 40 50 60 70 80 90 100 110 120 130<br />
Page 11 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
<strong>Efficiency</strong> and Power Loss at Different VDAC Voltages<br />
90.00<br />
<strong>Efficiency</strong> vs. Load current at different VID<br />
(Airflow=400LFM, ambient=27C)<br />
88.00<br />
86.00<br />
84.00<br />
82.00<br />
80.00<br />
78.00<br />
76.00<br />
Eff. at VID=1.55V<br />
Eff. at VID=1.35V<br />
Eff. at VID=1.15V<br />
0 20 40 60 80 100 120<br />
Power loss vs. Load current at different VID<br />
(Airflow=400LFM, ambient=27C)<br />
24.00<br />
22.00<br />
20.00<br />
Loss at VID=1.55V<br />
Loss at VID=1.35V<br />
Loss at VID=1.15V<br />
18.00<br />
16.00<br />
14.00<br />
12.00<br />
10.00<br />
8.00<br />
6.00<br />
0 20 40 60 80 100 120<br />
Page 12 1/16/2004
<strong>VRM10.1</strong> XPhase TM /DirectFET TM<br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong><br />
(DB3C)<br />
Effect of Gate Driver Voltage on Power Loss<br />
The following chart shows that the power loss at full load (120A) is affected by the gate driver<br />
voltage.<br />
(The standard 6-phase, 400KHz demo board has its gate voltage set at 7.5V)<br />
W<br />
36.0<br />
35.0<br />
34.0<br />
33.0<br />
Total Power Loss vs. Gate Driver Voltage<br />
(Load=120A)<br />
407B (6-phase, 830KHz)<br />
415A (5-phase, 1.02MHz)<br />
415A (5-phase, 810KHz)<br />
32.0<br />
31.0<br />
30.0<br />
29.0<br />
28.0<br />
27.0<br />
V<br />
4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0<br />
Page 13 1/16/2004
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
THERMAL DATA<br />
Conditions for the above thermal image:<br />
• Vin=12V, load current 120A, VID=1.55V<br />
• Total power on the demo board is about 24W<br />
• Airflow=300LFM (coming from the left),<br />
• Ambient temperature around 36 degree C.<br />
Note that phase IC #5 is hottest at 101 degree C<br />
Page 14 1/16/2004
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
The next image shows a much cooler VRM when airflow is increased to 400LFM (Other<br />
test conditions are the same: Vin=12V, I_out=120A, VID=1.55V, ambient=36 degree C)<br />
Page 15 1/16/2004
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
Maximum power loss is slightly higher with reduced airflow, as can be seen in the next chart:<br />
Power loss vs. Load current at different airflow<br />
(VID=1.55V, ambient=27C)<br />
24.00<br />
22.00<br />
20.00<br />
18.00<br />
Loss at 300LFM<br />
Loss at 400LFM<br />
Loss at 500LFM<br />
16.00<br />
14.00<br />
12.00<br />
10.00<br />
8.00<br />
6.00<br />
0 20 40 60 80 100 120<br />
The maximum temperature rise (measure on the hottest phase IC) is a strong function of the<br />
airflow:<br />
70.0<br />
Delta-Temperature vs. Airflow<br />
(Load=120A, VID=1.55V)<br />
65.0<br />
60.0<br />
Load=120A, VID=1.55V<br />
Load=105A, VID=1.35V<br />
55.0<br />
50.0<br />
45.0<br />
40.0<br />
200 300 400 500 600<br />
Page 16 1/16/2004
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
Startup Sequence<br />
When input voltage goes above 9.1V, SoftStart pin begins to charge up. When SoftStart pin<br />
charges to above 1.3V, the error amplifier output is released, which allows all PWMs to start<br />
switching. PowerGood signal is asserted when SS charges above 3.9V.<br />
Page 17 1/16/2004
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
BILL OF MATERIAL<br />
VRM10 2U <strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C), rev4.1.1 Revised: January 08, 2004<br />
1 C1 10nF 16V 10% 603 C1608X7R1H103K TDK<br />
21 C2,C3,C4,C14,C15,C24,C25, 0.1uF 16V 10% 603 C1608X7R1E104K TDK<br />
C34,C35,C44,C45,C54,C55,<br />
C64,C65,C111,C211,C311,<br />
C411,C511,C611<br />
1 C5 47p 16V 10% 603 C1608C0G1H470K TDK<br />
1 C6 22nF 16V 10% 603 C1608X7R1H223K TDK<br />
5 C7,C101,C102,C103,C104 open 16V 10% 603 TDK No Stuff<br />
1 C8 820p 16V 10% 603 C1608C0G1H821K TDK No Stuff<br />
1 C9 330pF 16V 10% 603 C1608C0G1H331K TDK<br />
6 C10,C20,C30,C40,C50,C60 100pF 16V 10% 603 C1608C0G1H101K TDK<br />
6 C11,C21,C31,C41,C51,C61 47nF 16V 10% 603 C1608X7R1H473K TDK<br />
6 C12,C22,C32,C42,C52,C62 220pF 16V 10% 603 C1608C0G1H221K TDK<br />
6 C13,C23,C33,C43,C53,C63 22nF 16V 10% 603 C1608X7R1H223K TDK<br />
6 C16,C26,C36,C46,C56,C66 0.1uF 25V 10% 603 C1608X7R1E104K TDK<br />
1 C17 1nF 16V 10% 603 C1608C0G1H102K TDK No Stuff<br />
6 C18,C28,C38,C48,C58,C68 open 25V 10% 603 TDK No Stuff<br />
2 C109,C105 0.1uF 25V 10% 603 C1608X7R1E104K TDK No Stuff<br />
2 C110,C106 1uF 16V 20% 603 C1608Y5V1C105M TDK No Stuff<br />
1 C107 4.7uF 16V 20% 1206 C3216X7R1C475M TDK No Stuff<br />
1 C108 4.7uF 16V 20% 1206 C3216X7R1C475M TDK<br />
12 C112,C113,C212,C213,C312, 10uF 16V 20% 1206 C3216X5R1C106M TDK<br />
C313,C412,C413,C512,C513,<br />
C612,C613<br />
6 C114,C214,C314,C414,C514, 10uF 6.3V 20% 1206 C3216X5R0J106M TDK<br />
C614<br />
6 C115,C215,C315,C415,C515, 0.1uF 16V 10% 603 C1608X7R1E104K TDK No Stuff<br />
C615<br />
2 D2,D1 CMDZ9L1 SOD123 CMDZ9L1-IRR<br />
1 D1A CMDZ9L1 SOD323 CMDZ9L1-IRR<br />
1 D2A CMDZ8L2 SOD323 CMDZ8L2-IRR Central Semi<br />
Page 18 1/16/2004<br />
No Stuff<br />
No Stuff<br />
4 D3,D4,D5,D6 MBR0530 30V SOD123 MBR0530 IR No Stuff<br />
6 D11,D21,D31,D41,D51,D61 MBR0530 30V SOD123 MBR0530 IR<br />
6 D12,D22,D32,D42,D52,D62 IR140CSP 40V FLIPKY IR140CSP IR No Stuff<br />
1 J1 Connector VRM10_1_EDGE<br />
2 L2,L1 10uH SUMITA_CR43 CR43-100 Sumida No Stuff<br />
6 L11,L21,L31,L41,L51,L61 220nH ETQP4L PA0511.221 Pulse<br />
Central<br />
1 Q1 CZT2222A 40V SOT223 CZT2222A-IRR Semi<br />
1 Q2 CZT2222A 40V SOT223 CZT2222A-IRR Central Semi<br />
No Stuff<br />
Digi-<br />
Key<br />
Central<br />
Semi<br />
4 Q3,Q4,Q5,Q6 2N7002 SOT23_2N7002 2N7002 No Stuff<br />
2 RT1,RT open 603<br />
Digi-<br />
Key No Stuff<br />
Digi-<br />
1 R1 30.1k 1% 603<br />
Key<br />
Digi-<br />
1 R2 20 1% 603<br />
Key
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
2 R4A,R3A 22k 5% 603<br />
1 R3B 100k 5% 603<br />
1 R3 14.7k 1% 603<br />
1 R4 10 5% 603<br />
1 R5A 750 1% 603<br />
1 R5 249 ohm 1% 603<br />
1 R6A 2.70k 1% 603<br />
1 R6 953 ohm 1% 603<br />
1 R7 430ohm 1% 603<br />
1 R8 3.74k 1% 603<br />
1 R9 4.02k 1% 603<br />
1 R10 330k 5% 603<br />
12 R11,R21,R31,R41,R51,R61, 20.0k 1% 603<br />
R124,R224,R324,R424,R524,<br />
R624<br />
2 R62,R12 5.36k 1% 603<br />
6 R13,R23,R33,R43,R53,R63 16.9k 1% 603<br />
6 R14,R24,R34,R44,R54,R64 22k 5% 603<br />
6 R15,R25,R35,R45,R55,R65 10.0k 1% 603<br />
6 R16,R26,R36,R46,R56,R66 6.19k 1% 603<br />
6 R17,R27,R37,R47,R57,R67 open 5% 805<br />
1 R18 14k 5% 603<br />
6 R19,R29,R39,R49,R59,R69 220k 5% 603<br />
2 R52,R22 34.0k 1% 603<br />
2 R32,R42 14.3k 1% 603<br />
1 R103 4.7k 5% 603<br />
1 R104 1.0k 5% 603<br />
3 R105,R106,R119 0 5% 603<br />
8 R107,R108,R109,R110,R111, open 1% 603<br />
R112,R113,R115<br />
2 R116,R114 10.0k 1% 603<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
No Stuff<br />
2 R117,R118 0 603 No Stuff<br />
12 R121,R123,R221,R223,R321, 0 5% 603<br />
Digi-<br />
Key No Stuff<br />
R323,R421,R423,R521,R523,<br />
R621,R623<br />
6 R122,R222,R322,R422,R522, TBD 1% 603<br />
Digi-<br />
Key<br />
No Stuff<br />
Page 19 1/16/2004
XPhase TM /DirectFET TM <strong>VRM10.1</strong><br />
<strong>High</strong> <strong>Efficiency</strong> <strong>Demo</strong> <strong>Board</strong> (DB3C)<br />
R622<br />
6 R125,R225,R325,R425,R525, 7.15k 1% 603<br />
R625<br />
1 TP1 EA TESTPOINT V1054-ND<br />
1 TP2 RMP TESTPOINT V1054-ND<br />
1 TP3 Ishare TESTPOINT V1054-ND<br />
2 TP5,TP6 GND TESTPOINT V1054-ND<br />
2 TP7,TP8 GND TESTPOINT V1054-ND<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
Digi-<br />
Key<br />
1 U1 IR3081 MLPQ28E IR3081 IR<br />
Linear<br />
2 U3,U2 LT1616 SOT223A LT1616<br />
Tech<br />
6 U10,U20,U30,U40,U50,U60 IR3086 MLPQ20E IR3086 IR<br />
6 U11,U21,U31,U41,U51,U61 IRF6608 30V DIRECTFET_ST IRF6608 IR<br />
6 U12,U22,U32,U42,U52,U62 IRF6618 30V DIRECTFET_MT IRF6618 IR<br />
No Stuff<br />
Page 20 1/16/2004
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