SGS Thomson Microelectronics VB409SP, VB409 Datasheet

TYPE I

VB409
VB409SP



HIGH VOLTAGE REGULATOR POWER I.C.

CL(in)

0.8 A 70 mA 5V ± 5%

I

CL(out)

V

VB409

/ VB409SP

PRELIMINARY DATA

OUT

■ NO HIGH VOLTAGE EXTERNAL CAPACITOR

■ 5 V DC REGULATED OUTPUT VOLTAGE

■ OUTPUT CURRENT LIMITED TO 70 mA

■ THERMAL SHUT-DOWN PROTECTION

■ INPUT OVERCURRENT PROTECTION

■ POWER DISSIPATION INTERNALLY LIMITED

DESCRIPTION

The VB409 VB409SP are fully protected positive
voltage regulator designed in STMicroelectronics
High Voltage VIPower

 technology. The devices

can be connected directly to the rectified mains
(110V/230V). The devices are well suited for
applications powered from the AC mains and
requiring a 5V DC regulated output voltage
without galvanic insulation. VB409, VB409SP
provides up to 70 mA output current (internally
limited) at 5V. The included over current and

BLOCK DIAGRAM

INPUT

10

PENTAWATT HV(022Y)

PowerSO-10

ORDER CODES:

PENTAWATT HV(022Y) VB409
PowerSO-10 VB409SP

thermal shutdown provide protection for the
device.

Cap

Input current
limiter

Threshold

1

Vref1

OUTPUT

GND

Vref2

Vref3

Thermal
protection

Output current

limiter

April 2000 1/9

1

VB409 / VB409SP

ABSOLUTE MAXIMUM RATING

Symbol Parameter Value Unit

∆V

IN,OUT

I

OUT

P

TOT

I

IN

T

j

T

STG

THERMAL DATA

Symbol Parameter

R

thj-amb

R

thj-case

CONNECTION DIAGRAM (TOP VIEW)

Input to output voltage - 0.2 to 420 V
Output current Internally limited mA
Power dissipation at TC=25°C Internally limited W
Input current Internally limited mA
Junction operatingtemperature - 40 to 125 °C
Storage temperature - 55 to 150 °C

Value Unit

PENTAWATT POWERSO-10 Unit

Thermal resistance junction-ambient (MAX) 60 50 °C/W
Thermal resistance junction-case (MAX) 1.1 °C/W

CAPACITOR
THRESHOLD

N.C.
GROUND
OUTPUT

6
7

8
9

10

11

INPUT

POWERSO-10

5
4
3

2
1

ELECTRICAL CHARACTERISTICS (V

V

=5V; -25ºC<Tj<125ºC) (unless otherwise specified)

OUT

N.C.
N.C.
N.C.
N.C.
N.C.

=230Vr.m.s.; 50Hz; C1=100µF; V1=50V (See Fig. 2); I

IN

5
4
3
2
1

PC10000

PENTAWATT HV(022Y)

OUTPUT
GROUND

INPUT
THRESHOLD
CAPACITOR

Symbol Parameter Test Conditions Min Typ Max Unit

V

IN(ac)

BV

IN-GND

f

IN

V

OUT

∆V

/∆V

OUT

∆V

/∆I

OUT

I

CL(out)

T

jsh

∆T

jsh

I

d

V

d

I

CL(in)

/∆T

∆V

cap

V

cap(max)

V

ref1

I

th

Input voltage a.c. 15 230 Vr.m.s.
Breakdown voltage

input-ground in off state

650 V

Input frequency 0 1 kHz
Output voltage 4.75 5 5.25 V
Cap regulation V

cap

Load regulation I

OUT

=8 to 12V; VIN=0V; Tj=25°C 7 mV/V

cap

=1 to 40mA; V

OUT

=10V; Tj=25°C 500 µV/mA

cap

Output current limit Tj=25°C7090mA
Junction temperature

shutdown limit
Junction temperature

shutdown hysteresis
Quiescent current Tj=25°C; I
Dropout voltage
(V

to V

OUT

)

cap

T

=25°C3V

j

=0A 2 mA

OUT

140 150 °C

35 °C

Input clamp current 0.8 2 A
Drift of capacitor pin
voltage in temperature
Max clamped voltage

on cap pin
Reference threshold

Voltage

12 14.5 V

10 10.5 11 V

-15 mV/°C

Current onthreshold pin 100 µA

OUT

=25mA;

2/9

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VB409 / VB409SP

OPERATION DESCRIPTION

The VB409, VB409SP contain two separate
stages, as shown in the block diagram. The first
stage is a preregulator that translates the high
rectified mains voltage to a low voltage and
charges an external electrolytic capacitor. The
second stage is a simple 5V regulator. The typical
operating waveforms are shown in Figure 2. The
device may be driven by a half wave (110 or 230
Vr.m.s.) or by a full wave using a bridge rectifier.
Current flow through the preregulator stage is
provided by the trilinton only during a conduction
angle, at both the start and the end of each half
cycle. This angle is set by adjusting the external
resistor divider (R1 and R2), in order to set the
time t
reaches the internal threshold V

at which voltage at the threshold pin

1

(see Figure

ref1

2a). When the threshold pin voltage gets over
V

, the series trilinton is switched off and

ref1

remains off until voltage at the threshold pin again
drops below the internal threshold. Using this
technique, energy is drawn from the AC mains
only during the low voltage portions of each
positive halfcycle, thus reducing the dissipation in
the first stage. During the conduction angle,
current provided by the trilinton is used to supply
the load and to charge the capacitor C1. In such a
way, when the trilinton switches off, the load
receives the required current by the capacitor
discharge. For this reason it is important to set
properly the conduction angle: during this period
C1 has to reach a sufficient charge to guarantee
that, at the end of discharging, the voltage drop

between the capacitor and the output pin is over
2V. Assuming that conduction angle has been set,
two different possibilities can occur:

1) C1 value is such to reach V

cap(max)

within the
conduction angle. As the comparator also
senses C1 voltage, when V

gets over V

cap

ref1

the trilinton would switch off. But doing this, the
capacitor would discharge through the load so
reducing its voltage. As soon as V
below V

, the trilinton switches on. As

ref1

cap

drops

consequence the trilinton reaches a stable
condition limiting the current to a value
sufficient to supply the load and hold the
capacitor voltage just below V

cap(max)

(see

figures 2b and 2c).

2) C1 value is such to reach V

cap(max)

outside the
conduction angle. In this case the trilinton
doesn’t reduce the current, but hold it to a
constant value (I

) during the whole

CL(in)

conduction angle (see figures3a and 3b).

As there are two conduction angles for each half
cycle, the capacitor isrecharged twice during each
period. In such a way the capacitor voltage has a
small ripple and, consequently, it needs a small
current to regenerate its charge. The device has
integrated current limit and thermal shutdown
protections. The thermal shutdown turns the low
voltage stage off,if the die temperature exceeds a
predetermined value. Hysteresis in the thermal
sense circuit holds the device off until the die
temperature cools down.

,

3/9

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VB409 / VB409SP

Figure 1: Applicationscheme

MAIN

INPUT

GND

Vref2

Vref3

APPLICATION EXAMPLE

(without heatsink; R1=1MΩ; C1=47µF)

I

OUT

10 mA 560 KΩ 0.32 W
15 mA 470 KΩ 0.49 W
20 mA 390 KΩ 0.67 W

Cap

C1

Input current

Thermal
protection

limiter

Output current
limiter

Vref1

Threshold

OUTPUT

VB049a1

R2 P

+

R

1

R

2

R

LOAD

AV

(without heatsink; R1=1MΩ; C1=100µF)

I

OUT

20mA 390 KΩ 0.70 W
25mA 330 KΩ 0.92 W
30mA 270 KΩ 1.20 W
35mA 220 KΩ 1.53 W
40mA 180 KΩ 1.92 W

4/9

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R2 P

AV

Figure 2: typical waveforms

Rectified
Main

V

max

V

1

VB409 / VB409SP

Figure 2a

V

V

cap(max)

V

cap(min)

I

CL(in)

t

1

t

T/2 T

2

t

Figure 2b

cap

t

Figure 2c

I

IN

I

OUT

t

Figure 2d

t

5/9

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VB409 / VB409SP

AVERAGE POWER CALCULATION IN WORST
CASE

As before explained, the device also senses the
preregulator voltage (V

), so that as soon as the

cap

capacitor reaches its maximum voltage, the
trilinton reduces the current so limiting furtherly

V
v

V

I

I

IN

max

1

IN

CL(in)

V

cap

t1 t2 T/2 T

0

Figure 3a

Figure 3b

power dissipation. On the contrary if the capacitor
doesn’t reach the maximum value, the trilinton
supplies current at asteady value (I

) during the

max

whole conduction angle. This is obviously the
worst case, in which the average power
dissipation is maximum.

2π

ICL in

()⋅

0

--- - -

t

⋅()sin⋅

T

0

t2t

elsewhere

Vmax



=

VIN




0

t



IIN

=




t

0

≤≤

T

-- -

≤≤

2

≤≤

T

-- -

t

2

tT

tt

1≤≤

T

--

2

Assuming that

0t1[, ]t2

T

---[,]=
2

are the conduction angles, it results:

PAV

I CL in()

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

I

CL in()

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

2

=

T

1

--

V IN I

⋅=

∫

T

0

Vmax

⋅

T

Vmax

⋅

T

IN⋅()td

t

1

∫

0

T

---- -

2π

=

2 π

--- - -

⋅()sin td

T

1

--

∫

T

t

+⋅==

2 π

-- - - -

t

T

As for t1:

V

1

------ --- -

Vmax

2 π

--- - -

t

1⋅()sin=

T

it follows:

P

AV

ICL i n()

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

=

⋅

π

Vmax

11

Where

R

1

V

1

Vref

1 1

()⋅=

--------+

R

2

t

1

V IN

0

T

-- ­2

∫

t

2

1⋅()cos– 0cos+[]⋅⋅

V

1



----------

––⋅



Vmax

T

--

ICL i n()⋅()td

2π

-- - - -

t

⋅()sin td

T

=

2

2

+⋅

∫

t

2

ICL in()

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

ICL in()

Vmax

⋅

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

π

VIN

t

ICL in()⋅()td

Vmax

⋅

T

11

––

⋅

=

t

1

2

∫

0

2

2π

-----

T

2 π

-----

t

T

1⋅()sin

t

⋅()sin td

=

=

6/9

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VB409 / VB409SP

PENTAWATT HV 022Y (VERTICAL HIGH PITCH) MECHANICAL DATA

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

A 4.30 4.80 0.169 0.189
C 1.17 1.37 0.046 0.054
D 2.40 2.80 0.094 0.110

E 0.35 0.55 0.014 0.022

F 0.60 0.80 0.024 0.031

G1 4.91 5.21 0.193 0.205
G2 7.49 7.80 0.295 0.307

H1 9.30 9.70 0.366 0.382
H2 10.40 0.409
H3 10.05 10.40 0.396 0.409

L 16.42 17.42 0.646 0.686

L1 14.60 15.22 0.575 0.599
L3 20.52 21.52 0.808 0.847
L5 2.60 3.00 0.102 0.118
L6 15.10 15.80 0.594 0.622
L7 6.00 6.60 0.236 0.260

M 2.50 3.10 0.098 0.122

M1 5.00 5.70 0.197 0.224

R 0.50 0.020

V4 90° 90°

Diam. 3.70 3.90 0.146 0.154

L

E

M1

M

R

Resinbetween

leads

G2

G1

V4

F

L1

A

D

L6

L3

C

L7

H2

H3

H1

L5

DIA

7/9

11

1

1

1

VB409 / VB409SP

PowerSO-10 MECHANICAL DATA

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

A 3.35 3.65 0.132 0.144

A1 0.00 0.10 0.000 0.004

B 0.40 0.60 0.016 0.024

c 0.35 0.55 0.013 0.022

D 9.40 9.60 0.370 0.378

D1 7.40 7.60 0.291 0.300

E 9.30 9.50 0.366 0.374

E1 7.20 7.40 0.283 0.291
E2 7.20 7.60 0.283 300
E3 6.10 6.35 0.240 0.250
E4 5.90 6.10 0.232 0.240

e 1.27 0.050

F 1.25 1.35 0.049 0.053
H 13.80 14.40 0.543 0.567

h 0.50 0.002

L 1.20 1.80 0.047 0.070
Q 1.70 0.067

α 0º 8º

8/9

==

==

HE

h

A

F

A1

e

0.25

M

D

==

D1

==

B

0.10 A

E1E3

==

SEATING
PLANE

A

C

α

B

E4

==

SEATING

PLANE

A1

L

==

610

E2

==

51

DETAIL”A”

B

Q

DETAIL ”A”

11

1

1

1

VB409 / VB409SP

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