High Voltage Converters

VIPerPLUS & Altair

STMicroelectronics

Viper*6 family deep technical overview

Viper and Altair portfolio overview

New members: Viper0P and Viper01x

Altair family features

Bonus: Isolated DC/DC

eDesignSuite demo

Agenda 2

Viper*6 family

VIPer*6 family: content 4

products features

applications

evaluation boards

typical circuitsVIPer*6

family

VIPer*6 family 5

products features

applications

evaluation boards

typical circuitsVIPer*6

family

Never so easy to design

Switch Mode Power Supply6

VIPerPlus - high voltage converter

Advanced controller with embedded 800V Power MOSFET

Robustness and Reliability

800V Power MOSFET, thermal shutdown, soft start, OLP protection, auto-restart

Energy saving

Power consumption less than 30mW at no load

High integration

Direct feedback, jittering, HV start-up

Flexibility

power scalability up to 12W, no aux winding, clamp-less design, no CM EMC filter

Output

rectification and

filtering

Input

rectification and

filtering

Feedback

..directly

from AC Mains

voltage...

.. to +/- DC bus

(3V3, 5V, 12V)

to supply:

~

Microcontroller

PWM driver

Relay

PWM

Controller

OLP

LOGIC

+

-

E/A

VDD

GND

+

-

PWM

Oscillator

LEB

BURST-MODE

Logic

TURN-ON

LOGIC

SOFT START

UVLO

BURST

OTP

LIM

VCOMPL

HV_ONSUPPLY

&

UVLO

IDDch

VREF_FB

THERMAL

SHUTDOWN

DRAIN

+

-

OCP

IDLIMset-up

S

R

Q

Burst

RSENSE

OTP

Internal Supply BUS &

REFERENCE VOLTAGES

COMP

FB

High Voltage START-UPEnabled during the start-up and every time

VDD voltage is lower than 9.5V (min).

Enables design without auxiliary winding

800V AR Power MOSFETsenseFET +

thermal sensor +

current sense resistor

PWM comparatorFor cycle by cycle turn-off

OCP comparatorOverload protection (IDLIM)

works in parallel with PWM

comparator

3V3 reference voltage Embedded E/A for direct

feedback with resistor from

the output

Jittered oscillatorThree frequency option:

30,60 and 115 kHz with

Jittering +/-6%

E/A compensationand/or OPTO-COUPLER input only

for isolated solution

OCP comparator

threshold setting

Short circuit protection:In case of overload, alternate 50ms ON / 1sec OFF

VIPer06

4W

7VIPer*6 family: block diagram

VIPer*6 family

Pout @ 85-265Vac

VIPer16

6W

VIPer26

12WVIPerA16

6W

VIPer*6 family

products features

applications

evaluation boards

typical circuitsVIPer*6

family

8

VIPer*6 in the applications 9

Home

Appliances

Metering Home

Automation

Lighting Automotive

VIPer*6 family Fixed frequency AC/DC converters

VIPer06, VIPer16, VIPerA16, VIPer26

The best partner to power your microcontroller

VIPer*6 for Metering 10

30kHz switching frequency to reduce noise in

the communication band (only VIPer06)

800V breakdown

Op-amp available for primary regulation

Flyback topology

Isolated

with primary regulation

VIPer*6in

smart energy meter

Isolated solution for

3 phase meter

Not isolated solution for

Single phase meter

Reduced noise

in the communication

bandRobustness

Aux SMPS

market needs

VIPer*6 based

AC/DC auxiliary power supply for

Inductor based

topology

Buck

VIPer*6, key benefits

& topologies supported

- microcontrollers

- transceivers

- metrology ICs

VIPer*6,

key benefits for the application

VIPer*6 for Home Appliances 11

Frequency jittering

VIPer*6 pin to pin compatible

800V breakdown

Self supply

Op-amp available for

primary regulation or

direct feedback

Isolated

primary regulation

secondary regulation

Buck

common neutral

Not isolated

direct feedback,

positive/negative output,

common neutral

Smart Flyback topologies

Buck-Boost

negative output,

common neutral

Small EMI input filterPower

scalability Reduced sizeHigh

efficiency

Aux SMPS

market

needs

VIPer*6

in home

appliances

Small Home Appliances Major Appliances

Inductor based

topologies

VIPer*6,

key benefits

& supported

topologies

VIPer*6 based

AC/DC auxiliary power supply for

- microcontrollers

- LEDs

- user interfaces

- motor driver ICs

Clamp-lessPowering MCU

to drive TRIAC

VIPer*6,

key benefits for

the application

VIPer*6 for Home Automation 12

30mW @ no load

Frequency jittering

800V breakdown

Self supply

Op-amp available

for direct feedback

Smart Flyback topologies

Not isolated, direct feedback,

positive/negative output, common neutral

Cost savingCap SMPS

replacement

Low

stand-by power ReliabilitySmall EMI input filter

Aux SMPS

market needs

VIPer*6

in home

automation

shutters control light

climate

Security systems

smart plug

Inductor based

topology

Buck

VIPer*6, key benefits

& topologies supported

VIPer*6 based

AC/DC auxiliary power supply for

- microcontrollers

- transceivers

- sensors

- motor driver ICsSafety systems

VIPer*6,

key benefits for

the application

Powering MCU

to drive TRIAC

VIPer*6 for Lighting 13

30mW @ no load

Operating temperature:

-25°C to +125°C

800V breakdown

Self supply

Op-amp available for

primary regulation

Isolated

with primary regulation

Smart Flyback

topologies

Robustness Reduced sizeCost saving

Isolated

with secondary regulation

Inductor based

topology

Buck

VIPer*6 based

AC/DC auxiliary power supply for

- microcontrollers

- transceivers

- lighting driver ICs

Aux SMPS

market

needs

VIPer*6,

key benefits

& supported

topologies

VIPer*6

in

street lighting

High

efficiencyLow

stand-by power

VIPer*6,

key benefits for

the application

14VIPerA16 for Automotive

AEQ100 compliant

Operating temperature: -40°C to +125°C

800V breakdown

Op-amp available for direct feedback

DC-DC conversion Strong thermal robustness Reliability

Li-Ion

Battery

pack

14V-15V

Aux SMPS

market needs

VIPerA16

in automotive

hybrid / EV control

VIPerA16 - Automotive grade 1,

key benefits for the application

VIPerA16 Key benefits

& topologies supported

HV DC/DC aux SMPS based on VIPerA16 for

- Li-Ion battery monitoring and cell balancing system

- DC-DC conversion to generate 12V/24V needs to subsystems

Isolated

primary regulation

secondary regulation

Not isolated

direct feedback

Smart Flyback topologies

200V-400V

12V -15V

- Contact to ST office for further info on VIPerA16 -

VIPer*6 family

products features

applications

evaluation boards

typical circuitsVIPer*6

family

15

16VIPer*6: isolated Flyback

Primary regulation Secondary regulation Secondary regulation

Perfect trade-off amongst

isolation, cost and output regulationStandard topology without aux winding

(VIPer self supply)

Isolated auxiliary SMPS

Standard topology

with the lowest stand-by consumption

17VIPer*6: not isolated Flyback(1/2)

NOT isolated auxiliary SMPS

Direct feedback Direct feedback

Minimal components count Minimal components count

with the lowest stand-by consumption

(Vout ≥ 12V)

18VIPer*6: not isolated Flyback(2/2)

NOT isolated auxiliary SMPS

Direct feedback Secondary regulation

+7V and -5V: outputs referred to neutral

with lowest stand-by consumption

+12V and -5V: outputs referred to neutral

with lowest stand-by consumption

Configurations with positive and negative outputs

19VIPer*6: inductor based topologies

Buck Buck-Boost with negative output

Powering a MCU able to drive a TRIACSimplicity and minimum size guaranteed

NOT isolated auxiliary SMPS

VIPer*6 family

products features

applications

evaluation boards

typical circuitsVIPer*6

family

20

21VIPer*6 based solutions(1/3)

STEVAL-ISA010V1

1.8W Super wide range

Buck converter

based on VIPer16LN

(dual outputs referred to neutral)

Vin = 85-500 Vac

Vout1 = 12V

Vout2 = 5V

IoutTOT= 150mA

Standby= 96mW @230Vac

AN2872

STEVAL-ISA096V1

2W Buck-Boost converter

based on VIPer06XS

(negative output referred to neutral)

Vin = 85-264 Vac

Vout = -12V

Iout= 150mA

Efficiency = 80%@230Vac (full load)

Standby< 30mW @264Vac

UM1470

Vin = 90-265 Vac

Vout = 12V

Iout = 150mA

AN4260 (*)

STEVAL-ISA115V1 (*)

1.8W Buck converter

based on VIPer06XN

(output referred to neutral)

Vin = 90-265 Vac

Vout = 12V

Iout = 140mA

Efficiency = 82.6% @85Vac (full load)

DN0009

STEVAL-ISA130V1 (*)

1.7 W Buck converter

based on VIPer06X

(output referred to neutral)

Solutions up to 2W(*) Available on request

22VIPer*6 based solutions(2/3)

Vin = 90-265 Vac

Vout = 16V

Iout = 280mA

Efficiency > 81% @230Vac (full load)

AN3028

STEVAL-ISA118V1

4.5W Not isolated Flyback converter

based on VIPer16LN

(direct feedback)

STEVAL-ISA112V1

STEVAL-ISA113V1

4.2W Not isolated Flyback converter

based on VIPer06HN / VIPer06HS

(direct feedback)

Vin = 90-265 Vac

Vout = 12V

Iout= 350mA

Efficiency 83%@115V (full load)

Standby<28.5mW@264Vac

AN4116,

AN4164

STEVAL-ISA071V2

4W Not isolated Flyback converter

based on VIPer16L

(direct feedback, dual outputs

referred to neutral)

Vin = 85-264 Vac

Vout1 = +7V

Iout1 = 160mA

Vout2 = -5V

Iout2= 400mA

Standby= 35mW @230Vac

UM0920

Solutions up to 4.5 W(*) Available on request

Vin = 90-265 Vac

Vout = 12V

Iout = 350mA

AN4259 (*)

STEVAL-ISA117V1 (*)

4.2W Isolated Flyback converter

based on VIPer16LN

(secondary regulation)

23VIPer*6 based solutions(3/3)

Vin = 90-265 Vac

Vout = 12V

Iout = 1A

Average efficiency @115Vac:

83.4% (115kHz), 87% (60kHz)

AN4106,

AN4165 (*)

STEVAL-ISA110V1 (*)

STEVAL-ISA111V1

12W Not isolated Flyback converter

based on VIPer26LN

(direct feedback;

60kHz, 115kHz version)

Vin = 85-305 Vac

Vout 1= 12V

Vout 2 = 3.3V

Iout 1= 900mA

Iout2= 100mA

Efficiency = 84% @230Vac (full load)

UM0984

STEVAL-ISA081V1

12W Isolated Flyback converter

based on VIPer16LND

(primary regulation)

Solutions up to 12 W

Vin = 85-305 Vac

Vout 1= 16V

Vout 2 = 5V

Iout 1= 300mA

Iout2= 15mA

AN draft (*)

STEVAL-ISA116V1 (*)

5W Buck converter

based on VIPer26LD

(*) Available on request

VIPerPLUS & Altair

STMicroelectronics

VIPerPlus & Altair: where every mW counts

More than 10 years ago, ST launched the first series of

VIPer® (Vertical Intelligent Power enhanced regulator)

high-voltage converters from the mains

Today, PSUs must provide advanced performance,

and energy-saving regulations require greater efficiency

VIPerPlus & Altair meets the challenge:

• combining an 800V or 900V(Altair) avalanche rugged power

section with state-of-the art PWM circuitry for control

• offering a comprehensive set of features and built-in

protections

The result is an SMPS design that meets most demanding

energy saving regulations and is reliable, flexible and, with

component count halved, less expensive

2

Family Portrait

Features

High Voltage ConverterVIPerPlus / Altair

PWM

Controller

VIPer*7

VIPer*8

VIPer*5

VIPer*6

Altair0*

Quasi resonant flyback with Brown-out

Jittered frequency flyback, buck, buck boost

Jittered Frequency flyback with Peak Power

Quasi resonant PSR flyback

Jittered Frequency flyback with Brown-out

Diffe

rent contr

ol s

ections

3

VIPer*1 Jittered frequency flyback, buck, buck boost – Minimal BOM

VIPer*P Jittered frequency flyback, buck, buck boost – Zero Power Mode

27

VIPer25 VIPer35

VIPer*7

VIPer*8

VIPer*5

VIPer*6

Different MOSFET size for different out power capabilities

10W 16W 20W

SSO10

DIP-7

SO16N

DIP-7

SO16N

DIP-7

SO16N (VIPer35)

SDIP10

@Vin: 230VAC±20% 8W

POWER MOSFET

6W 12W 15W4W@Vin: 85-265 VAC

PACKAGES

VBVDSS 800V

RDSON 32W

IDLIM 350mA

RDSON 24W

IDLIM 400mA

RDSON 7WIDLIM 700mA

RDSON 4.5WIDLIM 1A

10W

SO16N

7W

RDSON 19W

IDLIM 400mA

VBVDSS 900V

10W

SO16N

8W

RDSON 14W

IDLIM 400mA

VBVDSS 800V

Altair0*

VIPer06 VIPer16 VIPer26

VIPer17 VIPer27 VIPer37

VIPer28 VIPer38

Altair 04 Altair 05

Family Portrait

Power

VIPer*P VIPer0P1)

VIPer01VIPer*1

1)RDS_ON max = 20Ω

Constant Current Regulation

Differentiation 28

Brown out

Extra Power Timer (peak power)

Output OVP

Double level OCP

Embedded Error Amplifier

No need for auxiliary winding

Feedback disconnection

Quasi Resonant

Fixed Freq. (30,60 or 115KHz)

PWM current mode

Burst Mode

Soft start up

Thermal shutdown

Over load protection

Automatic restart after fault

Feed forward compensation

VIPer

*6

VIPer

*7

VIPer

*8

Jittering

VIPer

*5

Altair

Selection by topology

ISOLATED FLYBACK POWER SUPPLY

Primary regulation

Quasi Resonant

CC/CV

Altair

Secondary regulation

High Features

Jittered Fixed Frequency (60-115KHz)

Peak Power

VIPerPLUS

*8

Brown out

VIPerPLUS

*7

Quasi Resonant

Brown out

VIPerPLUS

*5

Minimal BOM

Jittered Fixed

Frequency

VIPerPLUS

*6

NON ISOLATED POWER SUPPLY

Fly Back

VIPerPLUS

*6

Buck

VIPerPLUS

*6

Buck Boost

VIPerPLUS

*6

x is used as a wildcard character for related part number

29

VIPerPLUS

*1

VIPerPLUS

*1

VIPerPLUS

0P

VIPerPLUS

0P

VIPer06 / 16 / A16 / 26: products description 30

• 800V, avalanche rugged power MOSFET

• PWM controller with drain current limit IDlim

• Adjustable current limit,IDlim

• Fixed frequency with Jittering

• high performance for stand-by & efficiency

• No need of auxiliary winding

• Automatic auto restart after faults

• Hysteretic thermal shutdown

• Direct feedback for non isolated SMPS

• Open loop protection

• Automotive grade: VIPerA16

MAIN PARAMETERS Power MOSFET CONTROLLER

Break down voltage [V] 800

RDSon [Ohm]

(resp Viper 06 / 16 / 26)32 / 24 / 7

VDD [V] 9 ÷ 23

FOSC [KHz] 30 (*) / 60 / 115

Max IDlim [mA] 400 / 700

RTHJ-A [°C/W] 80

POUT [W]@ 85-265 VAC 4 / 6 / 12

Main Features Pin description

GND

controller ground / power MOSFET Source

VDD

controller supply voltage / ICHARGE output current

LIM

Current limit set-up, IDlim .

FB

direct voltage feedback (in case of non isolated

SMPS or for primary regulation)

COMP

Compensation network.

Current loop feedback in case of isolated SMPS

N.A.

Not Available for user. (connected to GND)

N.C.

Not Connected

VIPer17 / 27 / 37: products description 31

Main Features

Main parametersMAIN PARAMETERS Power MOSFET CONTROLLER

Break down voltage [V] 800

RDSon [Ohm] 24 / 7 / 4.5

VDD [V] 9 ÷ 23

FOSC [KHz] 60 or 115

Max IDlim [mA] 420 / 740 / 1050

RTHJ-A [°C/W] (1) 50

POUT [W] @ 85-265VAC 6 / 12 / 15

(1) Package SO16N and 100mm2 of Cu

(2) Open Frame

• 800V, avalanche rugged power MOSFET

• PWM controller with drain current limit, IDlim.

• Adjustable current limit, IDlim

• Fixed Frequency with Jittering

• High performance for stand-by & efficiency

• Integrated protections: OVP, OLP, high OCP

• Automatic auto restart after fault

• Hysteretic thermal shutdown

• Brown-out: minimum input voltage is settable

Pin description

*

GND

controller ground / power MOSFET Source

VDD

controller supply voltage / ICHARGE output current

CONT

OVP set-up, IDLIM set-up.

FB

current loop feedback

BR

brown out set-up

N.A.

Not Available for user. (It can be connected to GND)

N.C.

Not Connected

*

VIPer0P – What new..?

Relia

bili

ty

En

erg

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avin

g

BO

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avin

g

• ENERGY SAVING:

• <5mW @230Vac in ZERO POWER MODE

• 10mW @230Vac in NO LOAD condition

• >60% eff. @ POUT 250mW @ 230Vac

• VCC voltage:

• REDUCED down to 4.5V (min value)

• Operating max value up to 30V

• Embedded E/A

• float E/A ground (pin EAGND)

• low VREF (1.2V)

• Protection:

• flux runaway protection

VIPer0P

32

VCC DRAIN

Supply bus

RSENSE

REGULATOR

4V

THERMAL

SENSOR

(OTP)

PGND

SOFT START

JITTERED

OSCILLATOR

E/A+

-

+-

FB

VFB_REF

PWM

-

+

TURN ON

LOGIC

COMP

OCP

MAX DUTY

UVLO VCC

VCC CLAMP

tOVL filter

S

R

Q

OTP

OCP

-

+

IDLIM reference

LIGHT LOAD PFM

ON OFF

ZERO POWER

LOGIC

disable

HV

Start up

RGVz

IHV

HV DISABLE

LOGIC

ICH*

LEB

EAGND

SGND

PROTECTION

LOGIC

tRESTART

High Voltage START-UPEnabled during the start-up and every time

VDD voltage is lower than 4.5V (min).

Enables design without auxiliary winding

800V AR MOSFETsenseFET +

thermal sensor +

current sense resistor

PWM comparatorFor cycle by cycle turn-off

OCP comparatorOverload protection (IDLIM)

works in parallel with PWM

comparator

1.2V E/A reference

voltage Set the output by

resistor divider

Jittered oscillatorTwo frequency option:

60 and 120 kHz +/-7%

E/A

compensationand/or OPTO-

COUPLER input only

for isolated solution

Protection:In case of overload, alternate 50ms ON / 1sec OFF

In case of OTP restart after 1 sec and check again the temp

ZERO POWER LOGICsleep mode with less of 5mW

consumption controlled by

ON/OFF pins

VIPer0P – block diagram

E/A float groundEasily set negative output

VIPer0P

33

34

Zero Power

State of art solution

SMPS

AC input

~ DC output

LOAD

MCU

SMPSVIPer0P

AC input

~ DC output

LOAD

MCU

Mechanical switch must be used to

have zero power consumption

4 mW1. ZPM is entered by MCU (switching

stop)

2. ZPM is ended by user using tactile

switch (switching restart)

Zero Power Mode (ZPM)

Zero Power

latest solution by VIPer0P

VIPer0P

Zero Power Mode

Forcing OFF pin to ground to enter in ZPM

→ managed by µC

→ de-bounce time is 10ms (tDEB_OFF)

Forcing ON to ground to exit from ZPM

→ managed by user (tactile button)

or µC (touch button)

→ de-bounce time is 20µs (tDEB_ON)

→ soft start-up during restart

In ZPM switching is inhibited, no voltage/power at the output

PIN = 2 mW @ 115VAC

PIN = 4 mW @ 230VAC

The µC is supplied by Viper0P in ZPM

VIPer0P

VOUT

OFF

Power

ONVIPer0P

mC

50kOhm

ON

VBIAS

VCC

DRAIN

Vreg

4V

35

VIPer01 – What new..?

Re

liab

ility

En

erg

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avin

g

BO

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avin

g

• ENERGY SAVING:

• 15mW @230Vac in NO LOAD condition

• >60% eff. @ POUT 250mW @ 230Vac

• VCC voltage:

• REDUCED down to 4.5V (min value)

• Operating max value up to 30V

• Embedded E/A

• low VREF (1.2V)

• Protection:

• Line or Output Overvoltage protection

• flux runaway protection

VIPer01

36

VIPer01 – block diagramHigh Voltage START-UPEnabled during the start-up and every time

VDD voltage is lower than 4.5V (min).

Enables design without auxiliary winding

800V AR MOSFETsenseFET +

thermal sensor +

current sense resistor

PWM comparatorFor cycle by cycle turn-off

OCP comparatorOverload protection (IDLIM)

works in parallel with PWM

comparator

1.2V E/A reference

voltage Set the output by

resistor divider

Jittered oscillatorTwo frequency option:

60 and 120 kHz +/-7%

E/A compensationand/or OPTO-COUPLER input only

for isolated solution

Protection:In case of overload, alternate 50ms

ON / 1sec OFF

In case of OTP restart after 1 sec and

check again the temp

INPUT LINE or OUTPUT OVP :0.5sec restart time

VIPer01

37

Pulse Frequency Mode if VCOMP<VCOMPL

PIN @ 115VAC = 8mW

PIN @ 230VAC = 10mW

VCOMPL

IDlim_PFM

time

IDRAIN

Normal Mode PFM Mode Normal Mode

VCOMP

≈

The skip cycle mode reduces the consumption

After three skipped cycles, many circuitries are switched off.

VIPer0P VIPer01

38Light Load and No Load

39

Supply voltage: VCC

Viper0P & VIPer01

can be biased through:

1. self-supply

2. output connection (also with VOUT = 5V!)

3. auxiliary winding

VCC

PGND DRAIN

DRAIN

SGND

COMP

EAGND

FB

ON

OFF

DRAIN

DRAIN

N.C.

N.C.

N.C.

N.C.

VIPer0P

VOUT

ICC

VCC

PGND DRAIN

DRAIN

SGND

COMP

EAGND

FB

ON

OFF

DRAIN

DRAIN

N.C.

N.C.

N.C.

N.C.

VIPer0PICC

VAux

ICCchx

VCC

PGND DRAIN

DRAIN

SGND

COMP

EAGND

FB

ON

OFF

DRAIN

DRAIN

N.C.

N.C.

N.C.

N.C.

VIPer0P

1

2

3

VIPer0P VIPer01

39

Soft start-up

Reduced transformer stress

Improved system reliability

Soft start zone with

growing IDLIM valueSteady state

Transient

zone

time

time

IDLIM

8 ms

IDRAIN

VOUT

At VCC=VCCon

VIPer0P VIPer01

40

Altair family: primary side regulation 41

• Cost effective solution

• dedicated CV-CC controller and

optocoupler

• Sense resistor and relevant

dissipation

Standard solution ALTAIR solution

Altair05T-800 Target Applications 42

AC-DC chargers for mobile phones and other hand-held

equipment

Compact SMPS that requires a precise voltage and/or

current regulation

ALTAIR05T-800 Main electrical parameters 43

Main Features

Main parametersMAIN PARAMETERS

Power MOSFET

(SuperMESH)

CONTROLLER

(BCD6S)

Break down voltage [V] 800

RDSon [Ohm] 11

VDD [V] 11.5 ÷ 23

FOSC [KHz] Up to 166 kHz

Restart time during burst mode 500us

RTHJ-A [°C/W] (1) 80

POUT [W] @ 85-265VAC 6

(1) Package SO16N and 100mm2 of Cu

Pin description

800V, avalanche rugged power section

QR current-mode PWM controller in BCD6 technology

Constant voltage and constant current output regulation (CV/CC) with no optocoupler

High performance for stand-by & efficiency

Integrated protections: 2nd OCP, open loop protection (brownout) OLP, high OCP

Automatic auto restart after fault

N.A.

N.A. CDC

SOURCE DRAIN

SOURCE

GND

IREF

ZCD/FB

COMP

Vcc

DRAIN

DRAIN

DRAIN

N.A.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

N.C.

N.A.

N.A. CDC

SOURCE DRAIN

SOURCE

GND

IREF

ZCD/FB

COMP

Vcc

DRAIN

DRAIN

DRAIN

DRAIN

DRAIN

N.A.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

N.C.

SO16

SOURCE: Power section Source

Vcc: Controller supply voltage / ICHARGE output current

GND: Controller ground

IREF: Current loop reference

ZCD/FB: Zero Current Detection, CV regulation, FF

compensation

COMP: Compensation network

CDC: Cable Drop Complensation

DRAIN: Power section Drain

Altair04-900 Target Applications 44

Energy metering SMPS

Power supply for 3-phase input industrial system

ALTAIR04-900 Main electrical parameters 45

Main parameters

900V, avalanche rugged power section

QR current-mode PWM controller in BCD6 technology

Constant voltage and constant current output regulation (CV/CC) with no optocoupler

High performance for stand-by & efficiency

Integrated protections: 2nd OCP, open loop protection (brownout) OLP, high OCP

Automatic auto restart after fault

Main Features

MAIN PARAMETERSPower MOSFET

(SuperMESH)

CONTROLLER

(BCD6S)

Break down voltage [V] 900

RDSon [Ohm] 16

VDD [V] 11.5 ÷ 23

FOSC [KHz] Up to 166 kHz

Restart time during burst mode 500us

RTHJ-A [°C/W] (1) 50

POUT [W] @ 85-265VAC 5

Pin description

SO16

SOURCE: Power section Source

Vcc: Controller supply voltage / ICHARGE output current

GND: Controller ground

IREF: Current loop reference

ZCD/FB: Zero Current Detection, CV regulation, FF

compensation

COMP: Compensation network

DRAIN: Power section Drain

N.A.

N.A. N.A.

SOURCE DRAIN

SOURCE

GND

IREF

ZCD/FB

COMP

Vcc

DRAIN

DRAIN

DRAIN

N.A.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

N.C.

N.A.

N.A.

SOURCE DRAIN

SOURCE

GND

IREF

ZCD/FB

COMP

Vcc

DRAIN

DRAIN

DRAIN

DRAIN

DRAIN

N.A.

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

N.C.

Order code p/n Short Description Vin Vout/Iout Document

STEVAL-ISA010V1 VIPER16LN Not isolated buck converter, 60khZ, DIP7 package 85-500Vac 12V±10%, 5V±4%, 150mA AN2872

STEVAL-ISA096V1 VIPER06XS Not isolated buck boost converter, 30khZ, SSO10 package 85-265Vac -12 V / 150mA UM1470

STEVAL-ISA114V1 VIPER06XS Not isolated buck converter, 30khZ, SSO10 package 80-265Vac 5V / 160mA AN4273

STEVAL-ISA115V1 VIPER06XS Not isolated buck converter, 30khZ, SSO10 package 85-265Vac 12V / 150mA AN4260

STEVAL-ISA119V1 VIPER16LD Not isolated buck converter, 60khZ, SO16N package 85-265Vac 12, 5V / 150mA AN4345

STEVAL-ISA130V1 VIPER06XN Not isolated buck converter, 30khZ, DIP7 package 85-375Vac 12V / 140mA DN0009

Full Set of Evaluation boards Flyback, Buck, Buck-Boost

46

STEVAL-ISA116V1 VIPER26LD Not isolated buck converter, 60khZ ,SO16N package 85-265Vac 16 V, 5V / 300mA AN4562

STEVAL-ISA112V1 VIPER06HN Not isolated fly-back, 115khZ, DIP7 package 85-265Vac 12V / 350mA AN4116

STEVAL-ISA113V1 VIPER06HS Not isolated fly-back, 115khZ, SSO10 package 85-265Vac 12V / 350mA AN4164

STEVAL-ISA110V1 VIPER26LN Fly-back (non iso), 60khZ, DIP7 package 85-265Vac 12V / 1A AN4106

STEVAL-ISA111V1 VIPER26HN Fly-back (non iso), 115khZ, DIP7 package 85-265Vac 12V / 1A AN4165

STEVAL-ISA060V1 VIPER17HN Fly-back (iso),115khZ, DIP7 package 85-265Vac 12V / 500mA AN2753

STEVAL-ISA062V1 VIPER17HN Fly-back (iso) (double out), 115khZ, DIP7 package 85-265Vac 5V,12V / 750mA AN2934

STEVAL-ISA117V1 VIPER16LN Fly-back (iso), 60khZ, DIP7 package 85-265Vac 12 / 400mA AN4259

STEVAL-ISA124V1 VIPER17HN Fly-back (iso) (CC/CV charger), 115khZ, DIP7 package 85-265Vac 5V / 1A AN2840

STEVAL-ISA125V1 VIPER28LN Fly-back (iso) (PEAK Power), 60khZ, DIP7 package 85-265Vac 5V / 2.4A draft

STEVAL-ISA126V1 VIPER28HN Fly-back (iso) (PEAK Power), 115khZ, DIP7 package 85-265Vac 5V / 2.4A AN2950

STEVAL-ISA071V2 VIPER16LN Fly-back (non iso) (negative) ,60khZ ,DIP7 package 85-265Vac -5V / 400mA, +7V / 160mA UM0920

STEVAL-ISA118V1 VIPER16LN Fly-back (non iso) ,60khZ ,DIP7 package 85-265Vac 16V / 280mA AN3028

STEVAL-ISA129V1 VIPER16HN Fly-back (non iso) ,115khZ ,DIP7 package 85-265Vac 16V / 280mA draf

STEVAL-ILL017V1 VIPER17HN Isolated fly-back (LED driver),115khZ, DIP7 package 220±20% 7V / 500mA AN2811

STEVAL-ISA134V1 VIPER06HN Isolated fly-back, 115khZ, DIP7 package 85-265Vac 12V / 330mA AN4372

STEVAL-ISA135V1 VIPER06HS Isolated fly-back, 115khZ, SSO10 package 85-265Vac 12V / 330mA AN4404

STEVAL-ISA136V1 VIPER06HN Isolated fly-back, 115khZ, DIP7 package 85-265Vac 5V / 600mA AN4410

STEVAL-ISA137V1 VIPER06HS Isolated fly-back, 115khZ, SSO10 package 85-265Vac 5V / 600mA AN4418

STEVAL-ISA121V1 VIPER37LE Fly-back (iso) ,60khZ ,SDIP10 package 85-265Vac 5V / 3A AN4007

STEVAL-ISA140V1 VIPER37HE Fly-back (iso) ,60khZ ,SDIP10 package 85-265Vac 12V / 1.2A AN4419

STEVAL-ISA153V1 VIPER38LE Fly-back (iso) (PEAK Power) ,60khZ ,SDIP10 package 90-265Vac 12V / 1.25A peak 1.8A AN4479

STEVAL-ISA081V1 VIPER26LN Fly-back (iso) (PRIMARY reg) ,60khZ, DIP7 package 85-265Vac 12V, 3.3V / 1A UM0984

STEVAL-ISA103V1 VIPER27LN Fly-back (iso) ,60khZ, DIP7 package 85-265Vac 5V / 2.4A AN2929

STEVAL-ISA120V1 VIPER27HN Fly-back (iso) (LED driver), 115khZ, DIP7 package 85-265Vac 10V / 750mA AN3212

STEVAL-ISA122V1 VIPER27HN Fly-back (iso),115khZ, DIP7 package 85-265Vac 5V / 2.2A AN3011

Order code p/n Short Description Vin Vout/Iout Document

EVLALTAIR05T-5W ALTAIR05T-8005 W wide range CV-CC optoless adapter demonstration

board90-265Vac 5V / 1A

AN3093

DB1534

EVLALTAIR900-M1

STEVAL-ISA133V1ALTAIR04-900

Double output SMPS for power line application using

ALTAIR04-900 primary controller85-265Vac

13V @ 550mA,

3.3V @ 100mA

AN3290

UM1518

STEVAL-ISA105V1 ALTAIR04-900 Power supply for energy meter and power line modem 90-440Vac

5V @ 70mA, 1A max,

3.3V @ 30mA, 150mA max

12V @ 2mA, 100mA max

5V ISO @ 2mA, 80mA max

AN4154

47

Up to 5W at wide input voltage range

Isolated

Evaluation boards - Altair

PSR Flyback topologies

Isolation Challenges for DC/DC

DC DC

Isolated DC-DC converter

Agenda

Typical applications for Isolated DC-DC converters

12V and 24V bus• Theory of flyback-buck topology

• ST solutions for flyback-buck

• Measurements of the prototype

• Conclusion

5V bus

• Theory flyback-boost

• ST solution for 5V bus

50

Isolated DC-DC converters are used in the applications where is requested power supply for

circuits which have different ground potential then the rest of the application

Power supply

• Welding machines

• Inductive heating

• Solar inverters

• Charger for Hybrid-electrical car and electrical car

Motor control

• Industrial motor drivers

• Automotive motor drivers

• Factory automation motor drivers

Metering

• Power supply for Metrology part in 3 phase power meters

I/O peripherals in automation system

• Power for isolated transceivers of the RS485, CAN, Profibus ….

DC DC

Applications for Isolated DC-DC 51

Example of the application

MPower

Stage

Control

600V

15V15V

Information

Power

List of the typical configuration

Output

Input 5V 12V 15V 24V

5V x

12V x x x x

15V x x x x

24V x x x x

52

Theory of Flyback-buck topology

52

Theory

Flyback-buck

VIN

G N D

C 1

C 2

R 2

R 1

T 1

D 1

C 3

Vout

GND_2

U 1

F B

Converter

L X

Step-down

Synchronous

Vin

GND_1

Ureg

L S

H S

𝑉𝑂𝑈𝑇 =𝑉𝑟𝑒𝑔 − 𝑉𝐿𝑆

𝑛− 𝑉𝐷1

𝑛 =𝑃𝑟𝑖𝑚

𝑆𝑒𝑐

𝑉𝐿𝑆 = 𝑅𝐷𝑆𝑂𝑁−𝐿𝑆 ∗ 𝐼𝑅𝑀𝑆

Vout – Output voltage

Vreg – Regulated voltage by converter

Vls – Voltage drop on the Low-side mosfet

Vd1 – Voltage drop on the diode D1

n – turns ratio of the transfomrer T1

Prim – number of the primary turns

Sec – number of the cesonadry turns

Rdson-LS – Rdson of the low-side mosfet

Irms – RMS current thru the LS mosfet

54

Theory

Flyback-buckState 1

LS switch: OFF

HS switch: ON

Current-A: C1 -> HS -> T1 -> C2 -> GND_1

State 2

LS switch: ON

HS switch: OFF

Current-A: C2 -> T1 -> LS -> GND_1

Current-B: T1 -> D1-> C3 -> GND_2

VIN

G N D

C 1

C 2

T 1

D 1

C 3

Vout

GND_2

U 1

L XVin

GND_1

Ureg

L S

H S

VIN

G N D

C 1

C 2

T 1

D 1

C 3

Vout

GND_2

U 1

L XVin

GND_1

Ureg

H S

L S

55

Operation mode of the controller

t

I

ton toff

Iout

L

0

t

I

ton toff ton toff

L

0

Iout

Medium and full load

LNM and LCM

Light load

LCM

Light load

LNM

t

I

ton toff

Iout

ton toff

L

0

Low consumption mode LCMmaximizes the efficiency at light load.

When the load is low, the burst mode is

activated. It minimizes the quiescent

current request.

Low noise mode (LNM) = Sink mode

= Forced PWMimplements a forced PWM operation over

the whole range of output current.

C 1

C 2

Vin

G N D

H S

Vout

G N D

L

L S

IoutI

L

56

ST solutions for Flyback-buck topology

56

57L6984

350mA synchronous buck converter• 350 mA DC output current

• 4.5 V to 36 V operating input voltage

• Synchronous rectification

• Low consumption mode or low noise mode

• 100 uA IQ at light load (LCM VOUT = 3.3 V)

• 13 uA IQ-SHTDWN

• Adjustable fSW (250 kHz - 600 kHz)

• Output voltage adjustable from 0.9 V

• VBIAS maximizes efficiency at light load

• 350 mA valley current limit

• Constant on time control scheme

• PGOOD open collector

• Thermal shutdown

PSKIP/PWM

FB

TON

EN

GND

PGOOD

VBIAS

VCC

VIN

LX

58Schematic example

• Input voltage: 10 – 36V

• Output power: 2.5W

• Switching frequency: 250kHz – 600kHz

Vin

GND_1

Vin

Ton

E N

L N M

E P G N D

P g o o d

F B

Vcc

L x

Vbias

1 0 u F

C 3

2 M

R 1

1 0 0 k

R 2

1 0 0 n F

C 4

4 7 0 n F

C 6

1 R

R 6

4.7uF

C 7

0R1

R 4

1 8 k

R 5

8 2 kR 3

1 0 n FC 5

T 1

D 1

STPS2L60

1 0 u F

C 1

1 0 u F

C 2

Vout

GND_2

L6984U 1

1:2

2 5 u H

59L6986

2 A synchronous step-down switching regulator• 2 A DC output current

• 4 V to 38 V operating input voltage

• Low consumption mode or low noise mode

• 30 uA IQ at light load (LCM VOUT = 3.3 V)

• 5 uA IQ-SHTDWN

• Adjustable fSW (250 kHz - 2 MHz)

• Output voltage adjustable from 0.85 V to VIN

• Embedded output voltage supervisor

• Synchronization

• Adjustable soft-start time

• Internal current limiting

• Overvoltage protection

• Peak current mode architecture

• RDSON HS = 180 mOhm, RDSON LS = 110 mOhm

60Schematic example

• Input voltage: 10 – 38V

• Output power: 14W

• Switching frequency: 250kHz – 2MHz

VIN

PGND

MLF

V C C

SS/INH

D E L A Y

SGND

F S W

E P SYNCH

COMP

1 0 u F

C 3

1 2 0 p F

C 9

1 3 0 k

R 2

1 0 u F

C 6

1 8 k

R 3

8 2 k

R 1

T 1

D 1

STPS2L60

1 0 u F

C 1

1 0 u F

C 2

Vout

GND_2L6986U 1

1:2

2 5 u H

PGND

F B

L X

L X

VBIAS

RST

1 u F

C 4

1 u F

C 5

6 8 n F

C 7

1 0 n F

C 8

Vin

GND_1

Measurements

of the prototype board

61

62Schematic of the prototype• Based on L6984

• Input voltage range: 10 – 32V

• Output voltage: 10V

• Output current: 250mA

• Switching frequency: 365kHz

7 - 32V

GND_1

Vin

Ton

E N

L N M

E P G N D

P g o o d

F B

Vcc

L x

Vbias

1 0 u F

C 3

2 M

R 1

1 0 0 k

R 2

1 0 0 n F

C 4

4 7 0 n F

C 6

1 R

R 6

4.7uF

C 7

0R1

R 4

1 8 k

R 5

8 2 kR 3

1 0 n FC 5

T 1

D 1

STPS2L60

1 0 u F

C 1

1 0 u F

C 2

1 0 V

GND_2

L6984U 1

1:2

2 5 u H

Hardware for the prototype 63

Manufacturer: Wurth Elektronik

Part number: 750370058

Primary inductance: 25uH

Turns ratio: 1 : 2 (prim : sec)

Core: EP7

PCB board Transformer

Evaluation board for L6984

There was used an evaluation board with L6984 in buck which was modified to the flyback-

buck topology. The transformer is from Wurth Elekronik.

50

mm

50mm

Typical waveforms at full load

2: Voltage on LX pin

3: Primary current

4: Secondary current

Input

Voltage: 11V

Current: 155mA

Output

Voltage: 9.55V

Current: 152mA

VIN

G N D

C 1

C 2

T 1

D 1

C 3

Vout

GND_2

U 1

L XVin

GND_1

Ureg

H S

L S

Measurements

25/02/2016Presentation Title

65

0

1

2

3

4

5

6

7

5 10 15 20 25 30 35

Inp

ut

cu

rren

t [m

A]

Input voltage [V]

Input current at no-load

40

50

60

70

80

90

100

0 400 800 1200 1600 2000 2400 2800

Eff

[%

]

Pout [mW]

Efficiency

Uin = 12V

Uin = 24V

8

8.5

9

9.5

10

10.5

11

11.5

12

0 50 100 150 200 250 300

Uo

ut

[V]

Iout [mA]

Load regulation

Uin = 12V

Uin = 24V

6

7

8

9

10

11

5 10 15 20 25 30 35

Uo

ut

[V]

Uin [V]

Line regulation

Iout = 10mA

Iout = 30mA

Iout = 60mA

Iout = 100mA

Iout = 150mA

Iout = 250mA

Applicable operating range 66

• Very good load regulation considering primary feedback

• No optocoupler

• Efficiency higher than 80% from 20% load

• Low input currrent during no-load operation (about 4mA)

• Suitable for industrial 12V and 24V bus

• Good line regulation

• Input voltage range: 8 -36V

• Output power:

12V bus 24V bus

L6984 2W 4W

L6986 10W 20W

5V bus

Flyback-boost topology

67

Theory

Flyback-boost

𝑉𝑂𝑈𝑇 =𝑉𝑟𝑒𝑔 − 𝑉𝐻𝑆 − 𝑉𝐼𝑁

𝑛− 𝑉𝐷1

𝑛 =𝑃𝑟𝑖𝑚

𝑆𝑒𝑐

𝑉𝐻𝑆 = 𝑅𝐷𝑆𝑂𝑁−𝐻𝑆 ∗ 𝐼𝑅𝑀𝑆

Vout – Output voltage

Vin – Input voltage

Vreg – Regulated voltage by converter

Vhs – Voltage drop on the High-side mosfet

Vd1 – Voltage drop on the diode D1

n – turns ratio of the transfomrer T1

Prim – number of the primary turns

Sec – number of the cesonadry turns

Rdson-HS – Rdson of the high-side mosfet

Irms – RMS current thru the LS mosfet

I N

G N D

C 1

C 2

R 2

R 1

T 1

D 1

C 3

Vout

GND_2

U 1

F B

Converter

L X

Step-up

Synchronous

Vin

GND_1

Ureg

L S

H S

O U T

69

Theory

Flyback-boostState 1

LS switch: ON

HS switch: OFF

Current-A: C1 -> T1 -> LS -> GND_1

State 2

LS switch: OFF

HS switch: ON

Current-A: C1 -> T1 -> HS -> C2 -> GND_1

Current-B: T1 -> D1-> C3 -> GND_2

G N D

I N

L X

O U T

C 2C 1

5 V

D 1

C 3

Vout

U 1

Ureg

T 1

GND_2

GND_1

H S

L

S

G N D

I N

L X

O U T

C 2C 1

5 V

D 1

C 3

Vout

U 1

Ureg

T 1

GND_2

GND_1

L S

H S

70

ST solution for flyback-boost topology

70

Solution for 5V BUSST8R00 – synchronous step-up converter

71

• Output voltage accuracy: ± 2%

• Output current up to 1 A

• Low ripple voltage: 5 mV (typ.)

• Synchronous rectification

• High 90% efficiency: VO = 9 V (typ.)

• Few external components

• Thermal shutdown protection

• Very small DFN8 (4 x 4 mm) packageINH

H

V

PGND G

N

D

I

N

L

X

O U T

F B

2 k

R 1

2 2 0 R

R 2

1 0 u F

C 21 0 u F

C 1

5 V

D 1

STPS120M

1 0 u F

C 3

Vout

U 1

ST8R00WPUR

Ureg

T 1

GND_2

GND_1

Measurements

of the prototype board

72

Hardware for the prototype 73

Manufacturer: Wurth Elektronik

Part number: 750370058

Primary inductance: 25uH

Turns ratio: 1 : 1 (prim : sec)

Core: EP7

PCB board Transformer

STEVAL-ISA048V2

There was used an evaluation board with ST8R00 in boost which was modified to the flyback-

boost topology. The transformer is from Wurth Elekronik.

Measurements

25/02/2016Presentation Title

74

40

45

50

55

60

65

70

75

80

0 500 1000 1500 2000

Eff

icie

ncy [

%]

Output power [mW]

Efficiency

3

3.5

4

4.5

5

5.5

6

6.5

7

0 50 100 150 200 250 300 350 400 450

Ou

tpu

t v

olt

ag

e [

V]

Output current [mA]

Load regulation

Isolation transformers options 75

http://coilcraft.com/prod_isolation.cfm

http://katalog.we-

online.de/en/pbs/search/POWER_MAGNETICS/TRANSFORMERS_FOR

_DCDC_CONVERTER

http://katalog.we-online.de/en/pbs/WE-FB