ST VIPer12ADIP - E, VIPer12AS - E User Manual

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Low Power OFF-Line SMPS Primary Switcher

Features

■ Fixed 60kHZ Switching Frequency

■ 9V to 38V Wide Range V

■ Current Mode Control

■ Auxiliary Undervoltage Lockout with Hysteresis

■ High Voltage Start-up Current Source

■ Overtemperature, Overcurrent and

Overvoltage Protection with Auto-Restart

■ Typical power capability

– European (195 - 265 Vac) 8W for SO-8,

13W for DIP-8

– European (85 - 265 Vac) 5W for SO-8,

8W for DIP- 8

Description

The VIPer12A combines a dedicated current
mode PWM controller with a high voltage Power
MOSFET on the same silicon chip.

Block diagram

Voltage

DD

VIPer12ADIP - E

VIPer12AS - E

DIP-8SO-8

Typical applications cover off line power supplies
for battery charger adapters, standby power
supplies for TV or monitors, auxiliary supplies for
motor control, etc.
The internal control circuit offers the following
benefits:

– L arge input voltage range on the V

accommodates changes in auxiliary supply
voltage. This feature is well adapted to

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

DD

pin

DRAIN

VDD

FB

REGULATOR

8/14.5V

42V

INTERNAL

SUPPLY

_

+

+
_

ON/OFF

OVERTEMP.

DETECTOR

R

FF

S

OVERVOLTAGE

Q

LATCH

60kHz

OSCILLATOR

S

FF

R1

R2

R4QR3

PWM

LATCH

BLANKING

+
_

0.23 V

Ω

230

Ω

1 k

SOURCE

January 2006 DocRev1 1/21

www.st.com

21

Contents VIPer12ADIP/ AS - E

Contents

1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 Pin connections and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Rectangular U-I Output characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 7

5 Wide range of VDD voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6 Feedback pin principle of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

7 Startup sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

8 Overvoltage threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

9 Operation pictures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

10 Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

11 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2/21 DocRev1

VIPer12ADIP/ AS - E Electrical data

1 Electrical data

1.1 Maximum rating

Stressing the device above the rating listed in the “Absolute Maximum Ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability. Refer also to the STMicroelectronics SURE
Program and other relevant quality documents.

Table 1. Absolute maximum rating

Symbol Parameter Value Unit

V

Switching drain source voltage (TJ = 25 ... 125°C) Note 1 -0.3 ... 730 V

DS(sw)

V

St art-up drain source voltage (TJ = 25 ... 125°C) Note 2 -0.3 ... 400 V

DS(st)

I

Continuous drain current Internally limited A

D

V

Supply voltag e 0 ... 50 V

DD

I

Feedback current 3 mA

FB

Electrostatic discharge:

V

Machine model (R = 0Ω; C = 200pF)

ESD

Charged device model

200

1.5

V

kV

T

Junction operating temperat ure Internally limited °C

J

T

Case operating temperature -40 to 150 °C

C

T

Storage Temperature -55 to 150 °C

stg

Note: 1 This parameter applies when the start-up current source is OFF. This is the case when the

V

voltage has reached V

DD

and remains above V

DDon

DDoff

.

2 This parameter applies when the start up current source is on. This is the case when the

V

voltage has not yet reached V

DD

or has fallen below V

DDon

DDoff

.

1.2 Thermal data

Table 2. Thermal data

Symbol Parameter SO-8 DIP-8 Unit

R

thJC

R

thJA Thermal Resistance Ambient-case

1. When mounted on a standard single-sided FR4 board with 200 mm2 of Cu (at least 35 µm thick)
connec te d to all DRAIN pin s.

Thermal Resistance Junction- case Max 25 15 °C/W

(1)

Max 5 5 45 °C/W

DocRev1 3/21

Electrical characteristics VIPer12ADIP/ AS - E

2 Electrical characteristics

TJ = 25°C, V

= 18V, unless otherwise specified

DD

Table 3. Power section

Symbol Parameter Test conditions Min. Typ. Max. Unit

BV

Drain-source voltage ID = 1mA; V

DSS

I

DSS

r

DS(on)

C

OFF State drain
current

Static drain-source
ON state resistance

t

Fall time

f

Rise time

t

r

Drain capacitance V

OSS

Note: 1 On clamped inductive load

Table 4. Supply section

Symbol Parameter Test conditions Min. Typ. Max. Unit

I

DDch

I

DDoff

St art-up charging
current

St art-up charging
current in thermal
shutdown

= 2V 730 V

FB

= 500V; V

V

DS

T

= 125°C

J

= 0.2A ID = 0.2A;

I

D

T

= 100°C

J

= 0.1A; V

I

D

Note 1 (See Figure 8 on page 13)

= 0.2A; V

I

D

Note 1 (See Figure 8 on page 13)

= 25V 40 pF

DS

V

= 100V; V

DS

(See Figure 9 on page 13)

V

= 5V; VDS = 100V

DD

T

> TSD - T

J

FB

= 300V

IN

= 300V

IN

DD

HYST

= 2V;

= 5V ...V

DDon

0.1 mA

27

100 ns

50 ns

-1 mA

0 mA

30
54

Ω

Operating supply

I

DD0

I

DD1

D

V

DDoff

V

DDon

V

DDhyst

V

DDovp

current not switching
Operating supply

current switching

Restart duty-cycle (See Figure 10 on page 13) 16 %

RST

Undervoltage

V

DD

shutdown threshold

Start-up

V

DD

threshold

Threshold

V

DD

hysteresis

Overvoltage

V

DD

threshold

I

= 2mA 3 5 mA

FB

= 0.5mA; ID = 50mA

I

FB

Note2

(See Figure 9,

Figure 10 on page 13)

(See Figure 9,

Figure 10 on page 13))

(See Figure 9 on page 13) 5.8 6.5 7.2 V

2 These test conditions obtained with a resistive load are leading to the maximum conduction

time of the device.

4/21 DocRev1

4.5 mA

7 8 9 V

13 14.5 16 V

38 42 46 V

VIPer12ADIP/ AS - E Electrical characteristics

Table 5. Oscillation section

Symbol Parameter Test conditions Min. Typ. Max. Unit

F

Oscillato r fr equency

OSC

total var iat ion

V

= V

DD

T

DDoff

= 0 ... 100°C

J

... 35V;

54 60 66 kHz

Table 6. PWM Comparator section

Symbol Parameter Test Conditions Min. Typ. Max. Unit

G

I

ID

I

Dlim

I

FBsd

R

FB

t

d

t

Blanking time 500 ns

b

t

ONmin

to ID current gain (See Figure 11 on page 14) 320

FB

Peak current
limitation

I

Shutdown current (See Figure 11 on page 14) 0.9 mA

FB

FB Pin input
impedance

Current sense del ay
to turn-OFF

Minimum Turn-ON
time

= 0V

V

FB

(See Figure 11 on page 14)

= 0mA

I

D

(See Figure 11 on page 14)

I

= 0.2A 200 ns

D

0.32 0.4 0.48 A

1.2 kΩ

700 ns

Table 7. Overtemperature section

Symbol Parameter Test Conditions Min. Typ. Max. Unit

T

SD

T

HYST

temperature
Thermal shutdown

hysteresis

(See Figure 12 on page 14) 140 170 °C

(See Figure 12 on page 14) 40 °C

Thermal shutdown

Table 8. Typical Power Capability

Mains type SO-8 DIP-8

European (195 - 265 Vac) 8W 13W

US / Wide range (85 - 265 Vac) 5W 8W

DocRev1 5/21

Pin connections and function VIPer12ADIP/ AS - E

3 Pin connections and function

Figure 1. Pin connection

SOURCE
SOURCE

FB

VDD

1

2

3

4

8

7

6

5

DRAIN
DRAIN
DRAIN
DRAIN

SO-8 DIP-8

Figure 2. Current and voltage conventions

I

DD

I

FB

V

DD

V

FB

VDD DRA IN

FB

VIPer12A

CONTROL

SOURCE
SOURCE

SOURCE

FB

VDD

1

2

3

4

I

D

V

D

8

DRAIN

7

DRAIN

6

DRAIN

5

DRAIN

Table 9. Pin fu nc ti on

Pin Name Pin Function

Power supply of the control circuits. Also provides a charging current during start up
thanks to a high voltage current source connected to the drain. For this purpose, an
hysteresis comparator monitor s the V

V

DD

SOURCE Power MOSFET source and circuit gr ound reference.

DRAIN

FB

6/21 DocRev1

: V oltage value (typically 14.5V) at which the device starts swit ching and turns

- V

DDon

off the start up current source.

- V

: Voltage value (typi cally 8V) at which the device st ops switching and turn s on

DDoff

the start up current source.

Power MOSFET drain. Also used by the internal high voltage current source during
start up phase for charging the external V

Feedback input. The useful volt age ran ge ex tends f rom 0V to 1V, and defines the peak
drain MOSFET current. The current limitation, which corresponds to the maximum
drain current, is obtained for a FB pin shorted to the SOURCE pin.

voltage and provides two thresholds:

DD

capacitor.

DD

VIPer12ADIP/ AS - E Rectangular U-I Output characteristics

4 Rectangular U-I Output characteristics

Figure 3. Rectangular U-I output characteristics for battery charger

A complete regulation scheme can achieve combined and accurate output characteristics.

Figure 3. presents a secondary feedback through an optocoupler driven by a TSM101. This

device 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 characteristic. This type of power supply is especially 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 convenient for Li-ion batteries which
require both modes of operation.

DocRev1 7/21