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 !!

88

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

ST Power Contact Window (Greater China Region)

jerry.shen@st.comJerry SHENShanghai

allan.lagasca@st.comAllan LAGASCATWN

Shenzhen

Shenzhen

TWN

Shanghai

Shenzhen

Location

Sam GUO

Tom HE

Polly YANG

John LU

David HUANG

Name

DL: 755-8601 2126Mb: 135 0961 0003Tom.he@st.com

FAE

Mb: +886-922-277598polly.yang@st.com

DL: 021-2418 8612Mb: 135 0173 7806John.lu@st.com

DL: 755-86012283Mb: 135 1034 2497david.huang@st.com

Marketing

sam.guo@st.com

Email @

DL: 755-8601 2334Mb: 138 2368 9148

Telephone

AE

Function

Welcome to contact us !!

3434

Q & AQ & AThanks!!!Thanks!!!