stm green model smps solution for high power slim adaptor
TRANSCRIPT
STM green model SMPS solution for high power SLIM adaptor
John LUAPM Technical Marketing, Shanghai
2009-MAR-18th
11
Agenda
Current Power Adapter status and challengesEnergy Star v2.0 specification for PC external powerST Proposal for the Slim Adapter(90W+)
Proposal (i) base on L6563+L6591@AHBProposal (ii) base on L6563+L6599A@LLCAHB@L6591, LLC@L6599A features comparison
ConclusionsST Power contact window (GC)Q&A
22
Current Power Adapter status and challenges
TM or FF PFC + Forward or ZVS HB
TM PFC + Forward or ZVS HB
TM PFC + Flyback (FF or QR)
Flyback (FF or QR)
Typical Solution
>85 %
>85 %
>82 %
>85 %
Typ. full-load efficiency
1 W>150 W Output
0.8 W<150 W Output
0.5 W<90 W Output
0.3 W<75 W Input
Typ. no-loadconsumption
Power rating
.Efficiency
.Power Density
.Standby
.Space/Thickness
.cost
Market Demands Market Demands
is changing is changing ……
Traditional Solution Traditional Solution can not meet market can not meet market demands any more??demands any more??
Opportunity for new Opportunity for new Solution !! Solution !! Where is ST..?Where is ST..?
?
33
Energy Star v2.0 Final Specification (Standard Models)
87%87%
Effective November 1, 2008Effective November 1, 2008for External Power Suppliesfor External Power Supplies
44
Energy Star v2.0 Final Specification (Low voltage products, <6V & >=550mA)
Effective November1, 2008Effective November1, 2008for External Power Suppliesfor External Power Supplies
55
Energy Star v2.0 Final Specification (No Load Specification)
Effective November1, 2008Effective November1, 2008for External Power Suppliesfor External Power Supplies
66
International Efficiency Marking Protocol
Format: Roman numeral: I, II, III, IV, V, or VI.Format: Roman numeral: I, II, III, IV, V, or VI.Font: Times Roman preferred (or other plain serFont: Times Roman preferred (or other plain serif fonts).if fonts).Size: Legible and indelible.Size: Legible and indelible.Color: Text to contrast with the nameplate backgrColor: Text to contrast with the nameplate background.ound.Placement: On the power supply nameplate; however, the exaPlacement: On the power supply nameplate; however, the exact locationct location
is at the discretion of the manufactuis at the discretion of the manufacturer. The text rer. The text ““Efficiency Efficiency LevelLevel”” shown above is optional.shown above is optional.
Example:Example:. . Any external power supplyAny external power supplyMeeting the performance Meeting the performance Requirements for level V and Requirements for level V and Above would qualify as Above would qualify as ENERGY STAR(v2.0)ENERGY STAR(v2.0). . Power suppliers with Power suppliers with Performance Levels of I Performance Levels of I –– IV IV would NOT qualify under the v2.0 would NOT qualify under the v2.0 Specification.Specification.
77
ST Proposal for Slim Adapter (90W+)
Proposal (i) (A.H/B)PFC : L6563PWM: L6591 A.H/BSyn-Rectification: IC(STSR2) or non-ICs driver
Proposal (ii) (LLC Resonant H/B)PFC: L6563PWM: L6599A Syn-Rectification: IC driver Available now !!
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High-power Adapter (90W+)System Architecture (i) @ AHB/L6591
Voutdc
PFC: L6563
PWM is turned off in case of PFC'sanomalous operation, for safety
PFC can be turned off at lightload to ease compliance withenergy saving requirements.
PWML6591
PFC PRE-REGULATOR (BOOST) DC-DC CONVERTER (ZVS HALF-BRIDGE)
EMIFilterVinac
Option:synchronous Rectification
STSR2
HG
LGCV/CC
CTL
99
L6563 : Advanced TM PFC controller
PWM_STOP
COMPMULT INV
L6562 CORE
ZCD
Vcc
GND
TBO
TRACKINGBOOST
FEEDBACKDISCONNECT.
DETECTION
PFC_OK VFF
VOLTAGEFEED
FORWARD
LEB +INDUCTOR
SATURATIONDETECTOR
ISEN
GD
INTERFACEWITH PWM
PWM_LATCHAC_OK
ACBROWNOUT
L6563
MAIN APPLICATIONS: 1. Hi-end AC-DC Adapter/Charger2. SMPS for Desktop PC's, Entry-level Servers 3. IEC61000-3-2 Compliant SMPS, up to 700W(FOT)
1010
L6591: AHB ZVS PWM Primary Controller
UP TO 500KHz OPER. FREQ.SMALL MAGNETICS AND CAP,
SHORT RESPONSE TIMES, SMALL FILTERS, LOW NOISE LEVELS
NO SWITCHINGLOSSES @ TURN ON
ZERO VOLTAGE SWITCHING
POWER DENSITYHALF BRIDGE TOPOLOGY
PROTECTIONS
PULSE-BY-PULSE OCPTRANSFORMER SAT. DETECTIONLATCHED OR AUTORESTART OVPBROWNOUT PROTECTIONADAPTIVE UVLO
LOW POWER
CONSUMPTION
ON-BOARD HV START-UP GEN.LOW QUIESCENT CURRENT (<3mA)BURST MODE @ LIGHT LOADINTERFACE PIN WITH PFC
SOFTSWITHCING
SOFTSOFT
SWITHCING
SWITHCING
1111
L6591: HB ZVS PWM Primary Controller
VREF
OSC
LINE
ISEN
SS
COMP
DIS
PFC_STOP
HVSTART
BOOT
GND
LVG
Vcc
HVG
FGND
N.C.
6
5
1
3
4
7
2
8
11
12
16
14
13
10
15
9
Typical Applications:
High Power AC-DC Adapters > 90W
ATX Desktop PCs (85+ initiative)
Servers (90+ initiative)
Telecom SMPS
Audio Systems
1212
Asymmetrical Half Bridge Waveforms
HB midpoint voltageVin
0
Q1 current
Hysteresis loop
0
D1 current
Iload
0
Tank circuit current
0
D2 current
Iload
0
Lout current
Iload
0
ASIMMETRIC
L6591
1313
⎟⎟⎠
⎞⎜⎜⎝
⎛+⋅⋅=
211
11nn
DVV inD
Vrect
ILout Iout
Vin·(1-D)/n1
Vin·D/n2
ID1 = ISEC1
ID2 = ISEC2
Vrect
D1
D2
Iout
( ) ⎟⎟⎠
⎞⎜⎜⎝
⎛+⋅−⋅=
212
111nn
DVV inD
Rectifiers reverse
voltages
AHB 2nd side Waveforms
1414
CONTROLPWM fixed frequency (Dmax = 50%)Dead time between HG and LG to allow ZVS
HALF BRIDGEZVS operation: Soft Switching - No switching losses @ turn-on
SECONDARY SIDEBalanced or unbalanced (Ns1≠Ns2) transformerOutput inductor needed
Can be coupled for multiple outputs
TRANSFORMERUnbalanced transformer: no need of high Llk to obtain ZVS
AHB Topology Key Features
1515
L6591 Promotional Tools
SAMPLES: AVAILABLE NOW (PRODUCTION PHASE)
DATASHEETs: AVAILABLE ON ST WEB SITE
DEMO BOARDS:EVL6591-90WADP (AVAILABLE – AN2842)
12V/90W AC-DC Adapter with PFC using L6563 + L6591Energy Star 2.0 compliant
EVL6591-250WATX (IN PROGRESS – PRELIMINARY DATA AND DEMO AVAILABLE UPON REQUEST)
12V, 5V and 3.3V outputs 250W ATX, based on L6591 ZVS AHB and L6563 PFC
85+ Compliant
1616
PFC STAGE
AHB STAGE
90w_12v demo@L6563+L6591, schematic
Options: Synchronous Rectifications
1717
88.30%102.4890.4912.067.5037100%
Table 1. Efficiency@115Vrms
12.07
12.08
12.09
Vout (V)
5.6287
3.7537
1.8787
Iout (A)
Average Eff for EPA
67.94
45.34
22.71
Pout (W)
76.67
51.41
26.83
Pin (W)
87.44%
88.61%75%
88.20%50%
84.66%25%
Eff (%)Load(%)
90.00%100.5590.4912.067.5037100%
Table 2. Efficiency@230Vrms
Average Eff for EPA
12.07
12.08
12.09
Vout (V)
5.6287
3.7537
1.8787
Iout (A)
67.94
45.34
22.71
Pout (W)
75.60
51.05
27.02
Pin (W)
88.19%
89.87%75%
88.82%50%
84.06%25%
Eff (%)Load(%)
Table 3. No Load Power Consumption (W)
0.235
135Vac
0.225
115Vac
0.255
180Vac
0.290
230Vac
0.3150.215
264Vac90Vac
90w_12v demo@L6563+L6591, Data (Schottky)
1818
90.25%100.2690.4912.067.5037100%
Table 1. Efficiency@115Vrms
12.07
12.08
12.09
Vout (V)
5.6287
3.7537
1.8787
Iout (A)
Average Eff for EPA
67.94
45.34
22.71
Pout (W)
74.89
50.22
26.34
Pin (W)
89.43%
90.97%75%
90.28%50%
86.21%25%
Eff (%)Load(%)
92.02%98.3390.4912.067.5037100%
Table 2. Efficiency@230Vrms
Average Eff for EPA
12.07
12.08
12.09
Vout (V)
5.6287
3.7537
1.8787
Iout (A)
67.94
45.34
22.71
Pout (W)
73,82
49.86
26.55
Pin (W)
90.13%
92.03%75%
90.93%50%
85.53%25%
Eff (%)Load(%)
Syn- Recti
IC or
Non-ICs
+2 % effiincreased
+2 %+2 % effieffiincreasedincreased
90w_12v demo@L6563+L6591, Data (Syn-Rect)
1919
High-power Adapter (90W+)System Architecture (ii) @ LLC/L6599A
Voutdc
PFCL6563
PWM is turned off in case of PFC'sanomalous operation, for safety
PFC can be turned off at lightload to ease compliance withenergy saving requirements.
RESONANTL6599A
PFC PRE-REGULATOR (BOOST) DC-DC CONVERTER (LLC RESONANT HALF-BRIDGE)
EMIFilterVinac
Option:synchronous rectification
HG
LGCV/CC
CTL
Syn-Rectidriver ICs Available !!
2020
UP TO 500KHz OPER. FREQ.SMALL MAGNETICS AND CAP,
SHORT RESPONSE TIMES, SMALL FILTERS, LOW NOISE LEVELS
LOSSLESS I/O TRANSFER OF ENERGY - REDUCED CONDUCTION
AND RADIATED NOISE
ZERO CURRENT & ZEROVOLTAGE SWITCHING
POWER DENSITYHALF BRIDGE TOPOLOGY
TWO-LEVEL OCP: FREQ. SHIFT and LATCHED SHUTDOWNBROWNOUT PROTECTIONLATCHED DISABLE INPUT
SAFETY
LOW POWER
CONSUMPTION
LOW QUIESCENT CURRENT (<2mA)BURST MODE @ LIGHT LOADINTERFACE PIN WITH PFC
L6599A: HV Resonant Controller
SOFTSWITHCING
SOFTSOFTSWITHCING
SWITHCING
2121
ZCS OperationNo recovery losses
Typical Resonant LLC Architecture
No OutputChoke
Td between LG and HGTo allow ZVS Operation@ Turn-on
Auxiliary Stage:• VIPer15/16/17 for std-by up to 5W• VIPer25/27/28 for std-by from 5W to 10W• L6566A/B with external Mosfet for higher power levels
Extremely lowconsumption
fsw ≈ frsinusoidal waveforms
low turn-off losseslow EMI
Out
2222
Typical Resonant LLC Architecturewith Synchronous Rectification
HigherEfficiency
ImprovedForm Factor
STDMOSFETs!(not logic)
Supporting alsoHousekeeping
function onsecondary side
with TSM104
2323
In L6599A, both DIP-16 and SO16N are from now on always Halogen-Free
A thermal extended (-40 to 125 deg) version can be derived. It is named L6599AT (L6599ATD, L6599ATDTR, L6599ATN)
Improved spread of electrical parameters (see other doc.)
Improved PFC_STOP function when used with L6563x. It possible to connect PFC stop pin (L6599A) directly with RUN pin (L6563x)
L6599A vs. L6599
2424
L6599A: Promotional tools
DATA SHEET: AVAILABLE ON THE WEB
APPLICATION NOTES:LLC RESONANT HALF-BRIDGE CONVERTER DESIGN GUIDELINE (AN2450)
19V-90W ADAPTER BOARD WITH PFC USING L6599 AND L6563 (AN2321)
400W L6599-BASED HB LLC RESONANT CONVERTER FOR PDP (AN2492)
400W L6599-BASED HB LLC RESONANT CONVERTER (AN2509)
200W L6599-BASED HB LLC RESONANT CONVERTER FOR LCD TV & FLAT PANELS (AN2393)
DEMO BOARDS:19V-90W BOARD WITH PFC USING L6599 AND L6563 (EVAL6599-90W)
200W SMPS FOR LCD TV, USING L6599, L6563 and VIPer12A (EVAL6599-200W)
400W SMPS FOR PDP USING L6599, L6563 and VIPer12A (EVAL6599-400W-S)400W GENERIC SMPS USING L6599, L6563 and VIPer12A (EVAL6599-400W-T)
350W 80+ DESKTOP SMPS (IN DESIGN)
DESIGN SOFTWARE:L6599 RESONANT CONVERTER DESIGN WORKBOOK (EXCEL SPREADSHEET, AVAILABLE ON REQUEST)
2525
GD2
SGND
EN
DVS1
DVS2
Vcc
GD1
PGND
1
2
3
4
8
7
6
5 GD2
SGND
EN
DVS1
DVS2
Vcc
GD1
PGND
1
2
3
4
8
7
6
5
Options: Synchronous Rectifications
90w_19v demo@L6563+L6599/A, schematic
2626
90w_19v demo@L6563+L6599/A, Data (schottky)
Average efficiency (%) : 115Vac @ 89.73 & 230Vac @ 91.16
2727
SR vs Schottky in Adapter Application
Ada
ptor
Out
put P
ower
STSR3/30STSR2SRK2000
+ Schottky diode solution is preferable: simpler and cost effective
3.3V 5V 12V 16V 19V
120W
90W
60W
45W
Due to the high current requirement, Synchronous Rectification is a must:
It allows space saving, cost reduction, reliability and performance improvement with respect to discrete solution
Adapter Output Voltage
2828
Main Features:Synchronous rectification for LLC resonant topology allows to have an highest efficiency & power densityAll synchronization signals from secondary side: simple design implementationCapability to work in CCM and DCM and manage all current/voltage waveforms typical of LLC topologyLight load detection and automatic sleep mode enter/exit: betterstandby and efficiencyVery low component count8 pins package, SO8Current drive capability for rectification Mosfet (standard and logic level) in power supply up to 12V/50A
SRK2000: Synchronous Rectification controller for LLC resonant topology
2929
SRK2000: Typical application schematic
The typical application are SMPSAdapter from 90 W (Space shrunk/slim form factor)PC (ATX) (high efficiency/ smaller heat sink)Sever (high efficiency)Console games (high efficiency)LCDTV (space shrunk/slim form factor)
3030
SRK2000: Efficiency results
Efficiency with synchronous rectifiers: 2 X STP270N4F3 (2.5 mOhm) (one for each center tap winding)
@ 390 Vdc input voltage:Vout = 11.98V Pout = 230.37WIout = 19.23A Pin = 242.50W eff% = 95.00%Vout = 11.99V Pout = 119.90WIout = 10.00A Pin = 127.10W eff% = 94.33%
Efficiency with schottky diodes: 4 X STPS20L40CFP (two for each center tap winding)
@ 390 Vdc input voltage:Vout = 11.98V Pout = 230.37WIout = 19.23A Pin = 249.70W eff% = 92.26%Vout = 11.99V Pout = 119.90WIout = 10.00A Pin = 130.45W eff% = 91.91%
+2.5% effiincreased
+2.5%+2.5% effieffiincreasedincreased
3131
AHB, LLC Features Comparison
If for Dual output (DCM)Ripple < 3% Vo
If for Dual output (CCM)Ripple < 1% Vo
Output Ripple Volt
A bit difficult to do syn- rectification due to variable freq, however ST dedicated IC driver is simple design implemented with very low component count
Easily to do Synchronous rectification thanks to fixed freq operation
2nd side sync-rectification
Variable freq, voltage mode,Dynamic = poor
Fixed Freq, pulse by pulse current mode, dynamic = perfectDynamic
able to reach 95~96% thanks to Q1/Q2 easier to realize ZVS, D=50% (Max)
able to reach 94~95% thanks to the ZVS on main Sw Q1 and reset Sw Q2, D<=50%
Efficiency (DC/DC block)
Pulse by Pulse Good.
80%Thermal: Perfect
Good
Available on L6591,Stand by performance is Perfect
A.H/B@L6591
Voltage modePoor.
100%Thermal: Poor
Perfect
Available on L6599A, Stand by performance is Perfect
LLC Res. H/B@L6599A
Protection
Transformer usage factor
EMI
Burst Mode
Features
3232
Conclusion:
Both L6563+L6591@AHB and L6563+L6599A@LLC which we proposed two platforms are suitable for the application of high-end adapter(90W+)(like Slim adapter)However, the features of AHB and LLC topology is somehow different. Which platform is better depends on exactly application specificationThe 2nd side synchronous rectification is available for both proposal, when/where to be use depends on exactly application specificationSRK2000, dedicated synchronous rectification controller for LLC resonant topology, samples is available upon your requests.
3333
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3434
Q & AQ & AThanks!!!Thanks!!!