Datasheet VIPER22AS, VIPER22ADIP Datasheet (SGS Thomson Microelectronics)

Septe m ber 2002 1/15

VIPer22ADI P

VIPer22AS

LOW POWER OFF LINE SMPS PRIMARY SWITCHER

®

TYPICAL POWER CA PABILITY

n

FIXED 60 KHZ SWI TCHING FREQUENCY

n

9V TO 38V WIDE RANGE VDD VOLTAGE

n

CURRENT MODE CONTROL

n

AUXILIARY UNDERVOLTAGE LOCKOUT
WITH HYSTERESIS

n

HIGH VOLTAGE START UP CURRENT
SOURCE

n

OVERTEMPERA TURE, OVERCURRENT AN D
OVERVOLTAGE PROTECTION WITH
AUTORESTAR T

DESCRIPTION

The VIPer22A combines a dedicated current mode
PWM controller with a high voltage Power

MOSFET on the same silicon chip. Typical
applications cover off line power supplies for
battery charg er adapter s, stan dby pow er suppl ies
for TV or monitors, auxiliary supplies for motor
control, etc. The i nternal control circuit offers the
following benefits:

– Large input voltage range on the VDD pin

accommodates changes in auxiliary supply
voltage. This fe ature is well adapted to battery

charger adapter configurations.
– Automatic burst mode in low load condition.
– Overvoltage protection in hiccup mode.

Main s t y pe SO-8 DIP- 8

European

(195 - 265 Vac)

12 W 20 W

US / Wide range

(85 - 265 Vac)

7 W 12 W

ORDER CODE S

PACKAGE TUBE T&R

SO-8 VIPer22AS VIPer22AS13TR
DIP-8 VIPer22ADIP -

SO-8 DIP-8

BLO C K DIAGRA M

ON/OFF

0.23 V

DRAIN

SOURCE

VDD

PWM

LATCH

60kHz

OSCILLATOR

BLANKING

+
_

8/14.5V

_

+

FF

S

R1

R4QR3

FB

REGULATOR

INTERNAL

SUPPLY

OVERVOLTAGE

LATCH

OVERTEMP.

DETECTOR

1 k

Ω

42V

_

+

R2

FF

S

R

Q

230

Ω

VIPer22ADIP / VIPer22AS

2/15

PIN FUNCTION

CURRENT AND VOLTAGE CONVENTIONS

CONNECTION DIAGRAM

Name Function

V

DD

Power supply of the control circuits. Also provides a charging current during start up thanks to a high
voltage current sour ce connected to the drai n. For this p urpose, an hysteresis comparator mo nitors the
V

DD

voltage and provides two thres holds:

- V

DDon

: Voltage value (typically 14.5V) at whi ch the device starts switching and tur ns off the start up

curre nt source.

- V

DDoff

: Voltage value (typically 8V) at which the device stops switching and turns on the start up current

source.

SOURCE Power MOSFET source and circuit ground reference.

DRAIN

Power MOSFET drain. Al so used by the internal high voltage cu rrent source during start up phase for
charging the extern al V

DD

capacitor.

FB

Feedbac k input. The useful voltage range extends from 0V to 1V, and defines the pea k drain MOSFET
current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin
shorted to the SOURCE pin.

I

DD

I

D

I

FB

V

DD

V

FB

V

D

FB

VDD DRAIN

SOURCE

CONTROL

VIPer22A

1

2

3

4

DRAIN

DRAIN

DRAIN
DRAIN

8

7

6

5

DRAIN

DRAIN

DRAIN
DRAIN

1

2

3

4

8

7

6

5

FB

VDD

SOURCE

FB

VDD

SOURCE

SOURCE SOURCE

SO-8 DIP8

VIPer22ADIP / VIPer22AS

3/15

ABSOLUTE MAXIMUM RATI NGS

Note: 1. This parameter applies when the start up current source is off. This is the case when the VDD voltage has reached V

DDon

and

remains ab ov e V

DDoff

.

2. This parameter applies when the s tart up current source is on. This is the case when the V

DD

voltage has not yet reached V

DDon

or has fallen below V

DDoff

.

THERMAL DATA

Note: 1. When mounted on a standard single-sided FR4 board with 200 mm² of Cu (at least 35 µm thick) connected to all DRAIN pins.

ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=18V, unless otherwise specified)

POWER SECTION

Note: 1. On clamped inductiv e load

Symbol Parameter Value Unit

V

DS(sw)

Switchin g Drain Source Voltage (Tj=25 ... 125 ° C) (See note 1)

-0.3 ... 730 V

V

DS(st)

Start Up Drain Source Voltage (Tj=25 ... 12 5°C) (See note 2)

-0.3 ... 400 V

I

D

Continuous Drain Current Internally limited A

V

DD

Supply V o ltage 0 ... 50 V

I

FB

Feedbac k Current 3 mA

V

ESD

Electrostatic Discharge:
Machine Model (R=0Ω; C=200pF)
Charged Device Model

200

1.5

V

kV

T

j

Junction Operating Temperature Internally limited °C

T

c

Case Oper ating Temperature -40 to 150 °C

T

stg

Storage Temperature -55 to 150 °C

Symbol Parameter Max Value Unit

Rthj-case

Thermal Resistance Junction-P ins for :
SO-8
DIP-8

25
15

°C/W

Rthj-amb

Thermal Resistance Junction-A m bient for :
SO-8 (See note 1)
DIP-8 (See note 1)

55
45

°C/W

Symbol Parameter Test Conditions Min. Typ. Max. Unit

BV

DSS

Drain-Source Voltage

I

D

=1mA; VFB=2V

730 V

I

DSS

Off State Drain Current

V

DS

=500V; VFB=2V; Tj=125°C

0.1 mA

R

DSon

Static Drain-Source
On State Resistance

I

D

=0.4A

I

D

=0.4A; Tj=100°C

15 17

31

Ω

t

f

Fall Time

I

D

=0.2A; VIN=300V (See fig.1)

(See note 1)

100 ns

t

r

Rise Time

I

D

=0.4A; VIN=300V (See fig.1)

(See note 1)

50 ns

C

oss

Drain Capaci tance

V

DS

=25V

40 pF

VIPer22ADIP / VIPer22AS

4/15

ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=18V, unless otherwise specified)

SUPPLY SECTION

Note: 1. These test condit ions obtained with a resist iv e load are lead ing to the maxim um c onduction time of the device.

OSCILLATOR SECTION

PWM COMPARATOR SECTION

OVERTEMPERATURE SECTION

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I

DDch

S ta r t Up Ch arging
Current

V

DS=100V; V

DD

=0V ...V

DDon

(See fig. 2)

-1 mA

I

DDoff

S ta r t Up Ch arging
Current
in Thermal Shutdown

V

DD

=5V; VDS=100V

T

j

> TSD - T

HYST

0mA

I

DD0

Oper ating Supply Current
Not Switching

I

FB

=2mA

35mA

I

DD1

Oper ating Supply Current
Switching

I

FB

=0.5mA; ID=50mA (Note 1)

4.5 mA

D

RST

Restart Duty Cycle (See fig. 3) 16 %

V

DDoff

V

DD

Undervoltage

Shut do w n Th reshold

(See fig. 2 & 3) 7 8 9 V

V

DDon

VDD Start Up Threshold

(See fig. 2 & 3) 13 14.5 16 V

V

DDhyst

VDD Threshold
Hysteresis

(See fig. 2) 5.8 6.5 7.2 V

V

DDovp

VDD Overvo ltage
Threshold

38 42 46 V

Symbol Parameter Test Conditions Min. Typ. Max. Unit

F

OSC

Oscillator Frequency
Total Variation

V

DD=VDDoff

... 35V; Tj=0 ... 100°C

54 60 66 kHz

Symbol Parameter Test Conditions Min. Typ. Max. Unit

G

ID

IFB to ID Current Gain

(See fig. 4) 560

I

Dlim

Peak Current Limitation

V

FB

=0V (See fig. 4)

0.56 0.7 0.84 A

I

FBsd

IFB Shutdown Cur rent

(See fig. 4) 0.9 mA

R

FB

FB Pin Input Impedance

I

D

=0mA (See fig. 4)

1.2 kΩ

t

d

Current Sense Delay to
Turn-Off

I

D

=0.4A

200 ns

t

b

Blanking Time 500 ns

t

ONmin

Minimum Turn On Time 700 ns

Symbol Parameter Test Conditions Min. Typ. Max. Unit

T

SD

Thermal Shutdown
Temperature

(See fig. 5) 140 170 °C

T

HYST

Thermal Shutdown
Hysteresis

(See fig. 5) 40 °C

VIPer22ADIP / VIPer22AS

5/15

Figur e 1 : Rise and Fall Time

Figur e 2 : Start Up VDD Current

Figur e 3 : Restart Duty Cycle

I

D

V

DS

90%

10%

t

fv

t

rv

t

t

L D

300V

C

FB

VDD DRAIN

SOURCE

CONTROL

VIPer22A

C << Coss

V

DD

V

DDhyst

V

DDoff

V

DDon

I

DD0

I

DDch

VDS = 100 V

F

sw

= 0 kHz

I

DD

t

V

DD

V

DDoff

V

DDon

t

CH

t

ST

D

RST

t

ST

tSTtCH+

-------------------------=

100V

10µF

FB

VDD DRAIN

SOURCE

CONTROL

VIPer22A

2V

VIPer22ADIP / VIPer22AS

6/15

Figur e 4 : Peak Drain Current vs. Feedback Current

Figur e 5 : Thermal Shutdown

I

FB

4mH

100V

100V

18V

FB

VDD DRAIN

SOURCE

CONTROL

VIPer22A

47nF

G

ID

I

Dpeak

∆

I

FB

∆

---------------------- -–=

I

D

I

Dpeak

t

1/F

OSC

I

FB

I

Dpeak

I

Dlim

I

FB

I

FBsdRFB

⋅

V

FB

The drain current limitation is
obtained for VFB = 0 V, and a
negative current is drawn from
the FB pin. See the Application
section for further details.

0

I

FBsd

t

t

V

DD

T

j

V

DDon

T

SD

T

HYST

Automatic

start up

VIPer22ADIP / VIPer22AS

7/15

Figur e 6 : Switching Frequency vs Tempera ture

Figur e 7 : Current Limitation vs Temperature

-20 0 20 40 60 80 100 120

Temperature (°C)

0.97

0.98

0.99

1

1.01

Normalized Frequency

Vdd = 10V ... 35V

-20 0 20 40 60 80 100 120

Temperature (°C)

0.94

0.95

0.96

0.97

0.98

0.99

1

1.01

1.02

1.03

1.04

Normalized Current Limitation

Vin = 100V

Vdd = 20V

VIPer22ADIP / VIPer22AS

8/15

Figur e 8 : Rectangular U-I output characteristics for battery charger

RECTANGULAR U-I OUTPUT
CHARACTERISTIC

A complete regulation scheme can achieve
combined and accurate output characteristics.
Figure 8 presents a seco ndary feedback through
an optocoupl er driven by a TSM101. This dev ice
offers two operational amplifiers and a voltage
reference, thus allowing the regulation of both
output voltage and current. An integrated OR
function performs the combination of the two
resulting error signals, leading to a dual voltage
and current limitation, known as a rectangular
output characteri stic .

This type of pow er supply is especial ly useful for
battery chargers where the output is mainly used in
current mode, in order to deliver a defined charging
rate. The accurate voltage regulation is also
convenien t for Li-ion batterie s which require both
modes of operation.

WIDE RANGE OF VDD VOLTAGE

The VDD pin voltage range extends from 9V to 38V.
This feature offers a great flexibility in design to
achieve various behaviors. In figure 8 a forward
configuration has been chosen to supply the
device with two benefits:

– as soon as the device starts switching, it

immediately receives some energy from the

auxiliary winding. C5 can be therefore reduced

and a small ceramic chip (100 nF) is sufficient to

insure the filtering function. The total start up

time from the switch on of input voltage to output

voltage presence is dramatically decreased.
– the output current characteristic can be

maintained even with very low or zero output

voltage. Since the TSM101 is also supplied in

forward mode, it keeps the current regulation up

whatever the output voltage is.The VDD pin

voltage may vary as m uch a s the input voltag e,

that is to say with a ratio of about 4 for a wide

range application.

T1

D3

C5

C4

-+

D4

C3

T2

F1

C1

C10

-

+

-

+

Vref

Vcc

GND

U2

TSM101

R6

R9

R10

R4

C9

R7R5R8

C8

R3

ISO1

D2

D5

R2

C7

R1

C2

D1

FB

VDD DRAIN

SOURCE

CONTRO L

U1

VIPerX2A

C6

AC IN

DCOUT

GND

VIPer22ADIP / VIPer22AS

9/15

FEEDBACK PIN PRINCIPLE OF OPERATION

A feedback pin controls the operation of the
device. Unli ke conventional PWM control circuits
which use a voltage input (the inverted inp ut of an
operational amplifier), the FB pin is sensitive to
current. Figure 9 presents the internal current
mode structure.

The Power MOS FET delivers a sense current I

s

which is proportional to the main current Id. R2
receives this cu rrent and the current coming from
the FB pin. The voltage across R2 is then
compared to a fixed reference voltage of about

0.23 V. The MOSFET is switched off when the
following equation is reached:

By extracting IS:

Using the current sense ratio of the MOSFET GID:

The curren t limitation is obt ained with the FB pin
shorted to ground (VFB = 0 V). This leads to a
negative current sourced by this pin, and
expressed by:

By reporting this expression in the previous one, it
is possible to obtain the drain current limitation
I

Dlim

:

In a real applicat ion, the FB pin is driven w ith an
optocoupler as sho w n o n figu re 9 wh ich act s as a
pull up. So, it is not possible to really short this pin
to ground and the above drain current value is not
achievable. Nevertheless, the capacitor C is
averaging the voltage on the FB pin, and when the
optocoupler is off (start up or short circuit), it can be
assumed that the corresponding voltage is very
close to 0 V.

For low dr ain curre nts, the form ula (1) is valid as
long as IFB satisfies IFB< I

FBsd

, where I

FBsd

is an
internal threshol d of the VIPer22A. If IFB exceeds
this threshold the d evice will sto p switchin g. T his is
represented on figure 4, and I

FBsd

value is
specified in the PWM COMPARATOR SECTION.
Actually, as soon as the drain current is about 12%
of Idlim, that is to say 85 mA, the device will enter
a burst mode operation by missing switching
cycles. This is especially important when the
converter is lightly loaded.

It is then possible to build the total DC transfer
function between ID and IFB as shown on figure 10.
This figure also takes into account the internal
blanking time and it s associated minimum tur n on
time. This imposes a minimum drain current under
which the device is no more able to control it in a
linear way. This drain current depends on the
primary inductance value of the transformer and
the input voltage. Two cases may occur,
depending on the val ue of this curr ent versus the
fixed 85 mA value, as described above.

START UP SEQUENCE

This device includes a high voltage start up current
source connecte d on the drain of the device. As
soon as a voltage is applied on the input of the
converter, this start up cur rent source is activat ed
as long as VDD is lower than V

DDon

. When

reaching V

DDon

, the start up current source is
switched off and the device begins to o perate by
turning on and off its main power MOSFET. As the
FB pin does not receive any current from the
optocoupler, the device operates at full current
capacity and the output voltage rises until reaching

Fi

gure 9 : Internal Current Control Structure

60kHz

OSCILLATOR

PWM

LATCH

S

Q

R

0.23V

Id

DRAIN

SOURCE

FB

R1

R2

C

+Vdd

Secondary
feedback

I

FB

Is

1 kΩ

230 Ω

R2ISIFB+()⋅ 0.23V=

I

S

0.23V
R

2

-------------- IFB–=

I

D

GIDIS⋅ G

ID

0.23V
R

2

-------------- IFB–





⋅==

I

FB

0.23V
R

1

--------------–=

I

Dlim

GID0.23V

1

R

2

------

1

R

1

----- -+





⋅⋅=

Fi

gure 10 :

I

FB

Transfer function

I

FBsd

I

Dlim

I

FB

t

ONmin

V

2

⋅

IN

L

---------------------------------------

t

ONmin

V

1

⋅

IN

L

---------------------------------------

85mA

I

Dpeak

0

Part masked by the

I

FBsd

threshold

VIPer22ADIP / VIPer22AS

10/15

the regulation point where the secondary loop
begins to send a current in the optocoupler. At this
point, the converter ent ers a regulated operation
where the F B pin receives the amount of current
needed to deliver the right power on secondary
side.

This sequence is shown in figure 11. Note that
during the real starting phase tss, the device
consumes some energy from the VDD capacitor,
waiting for the auxiliary winding to provide a
continuous s upply. If th e value of this c apacitor i s
too low, th e start up phase is terminated before
receiving any energy from the auxiliary winding
and the converter never starts up. This is illustrated
also in the same figure in dashed lines.

OVERVOLTAGE THRESHOLD

An overvoltage dete c tor on the VDD pin allows the
VIPer22A to reset itself when VDD exceeds
V

DDovp

. This is illustrated in figure 12, which shows
the whole sequence of an overvoltage event. Note
that this event i s only latche d for the time needed
by VDD to reach V

DDoff

, and then the device

resumes normal operati on autom atic ally .

Fi

gure 11 : Start Up Sequence

t

t

I

FB

V

DDon

t

V

OUT

V

DD

V

DDoff

tss

Fi

gure 12 : Overvoltage Sequence

t

t

V

DS

V

DDon

V

DD

V

DDoff

V

DDovp

VIPer22ADIP / VIPer22AS

11/15

DIM.

mm. inch

MIN. TYP MAX. MIN. TYP. MAX.

A 1.75 0.068
a1 0.1 0.25 0.003 0.009
a2 1.65 0.064
a3 0.65 0.85 0.025 0.033

b 0.35 0.48 0.013 0.018
b1 0.19 0.25 0.007 0.010

C 0.25 0.5 0.010 0.019

c1 45 (typ .)

D 4 .8 5 0.188 0.196

E

5.8

6.2 0.228 0.244

e 1.27 0.050
e3 3.81 0.150

F 3.8 4 0.14 0.157

L 0.4 1.27 0.01 5 0. 050

M 0.6 0.023

S 8 (max.)
L1 0.8 1.2 0.031 0.047

1

SO-8 MECHANICAL DATA

VIPer22ADIP / VIPer22AS

12/15

DIM.

mm.

MIN. TYP MAX.

A 5.33
A1 0.38
A2 2.92 3.30 4.95

b 0.36 0.46 0.56
b2 1.14 1.52 1.78

c 0.20 0.25 0.36
D 9.02 9.27 10.16
E 7.62 7.87 8.26

E1 6.10 6.35 7.11

e2.54

eA 7.62
eB 10.92

L 2.92 3.30 3.81

Packag e W eight Gr. 470

P001

Plastic DIP-8 MECHANI CAL DATA

VIPer22ADIP / VIPer22AS

13/15

1

SO-8 TUBE SHIPMENT (no suffix)

All dimensions are i n m m .

Base Q.ty 100
Bulk Q.ty 2000
Tube length (± 0.5) 532

A 3.2
B 6
C (± 0.1) 0.6

TAPE AND REEL SHIPMENT (suffix “13TR”)

All dimensions are i n m m .

Base Q.ty 2500
Bulk Q.ty 2500
A (max) 330
B (min) 1.5
C (± 0.2) 13

F 20.2
G (+ 2 / -0) 12.4
N (min) 60
T (max) 18.4

TAPE DIMENSIONS

According to Electronic Industries Asso ciation
(EIA) S tanda rd 481 re v. A, Feb 1 9 86

All dimensions are i n m m .

Tape width W 12
Tape Hole Spacing P0 (± 0.1) 4
Component Spacing P 8
Hole Diameter D (± 0.1/-0) 1.5
Hole Diameter D1 (min) 1.5
Hole Position F (± 0.05) 5.5
Compartment Depth K (max) 4.5
Hole Spacing P1 (± 0.1) 2

Top

cover

tape

End

Start

No componentsNo components Components

500mm min

500mm min

Empty components pockets
saled with cover tape.

User direction of feed

REEL DIMENSIONS

C

B

A

VIPer22ADIP / VIPer22AS

14/15

11

DIP-8 TUBE SHIPMENT (no suffix)

All dimensions are in mm.

Base Q.ty 20
Bulk Q.ty 1000
Tube length (± 0.5) 532

A 8.4
B 11.2
C (± 0.1) 0.8

A

B

C

VIPer22ADIP / VIPer22AS

15/15

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