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

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.

DRAIN

VDD

REGULATOR

8/14.5V

42V

INTERNAL

SUPPLY

+ _

ON/OFF

OVERTEMP.

DETECTOR

OVERVOLTAGE

LATCH

60kHz

OSCILLATOR

R4QR3

PWM

LATCH

BLANKING

+ _

0.23 V

Ω

230

Ω

1 k

SOURCE

January 2006 DocRev1 1/21

www.st.com

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

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

DS(sw)

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

DS(st)

Continuous drain current Internally limited A

Supply voltag e 0 ... 50 V

Feedback current 3 mA

Electrostatic discharge:

Machine model (R = 0Ω; C = 200pF)

ESD

Charged device model

200

1.5

Junction operating temperat ure Internally limited °C

Case operating temperature -40 to 150 °C

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

voltage has reached V

and remains above V

DDon

DDoff

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

voltage has not yet reached V

or has fallen below V

DDon

DDoff

1.2 Thermal data

Table 2. Thermal data

Symbol Parameter SO-8 DIP-8 Unit

thJC

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

Table 3. Power section

Symbol Parameter Test conditions Min. Typ. Max. Unit

Drain-source voltage ID = 1mA; V

DSS

DS(on)

OFF State drain current

Static drain-source ON state resistance

Fall time

Rise time

Drain capacitance V

OSS

Note: 1 On clamped inductive load

Table 4. Supply section

Symbol Parameter Test conditions Min. Typ. Max. Unit

DDch

DDoff

St art-up charging current

St art-up charging current in thermal shutdown

= 2V 730 V

= 500V; V

= 125°C

= 0.2A ID = 0.2A;

= 100°C

= 0.1A; V

Note 1 (See Figure 8 on page 13)

= 0.2A; V

Note 1 (See Figure 8 on page 13)

= 25V 40 pF

= 100V; V

(See Figure 9 on page 13)

= 5V; VDS = 100V

> TSD - T

= 300V

HYST

= 2V;

= 5V ...V

DDon

0.1 mA

100 ns

50 ns

-1 mA

0 mA

30 54

Ω

Operating supply

DD0

DD1

DDoff

DDon

DDhyst

DDovp

current not switching Operating supply

current switching

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

RST

Undervoltage

shutdown threshold

Start-up

threshold

Threshold

hysteresis

Overvoltage

threshold

= 2mA 3 5 mA

= 0.5mA; ID = 50mA

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

Oscillato r fr equency

OSC

total var iat ion

= V

DDoff

= 0 ... 100°C

... 35V;

54 60 66 kHz

Table 6. PWM Comparator section

Symbol Parameter Test Conditions Min. Typ. Max. Unit

Dlim

FBsd

Blanking time 500 ns

ONmin

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

Peak current limitation

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

FB Pin input impedance

Current sense del ay to turn-OFF

Minimum Turn-ON time

= 0V

(See Figure 11 on page 14)

= 0mA

(See Figure 11 on page 14)

= 0.2A 200 ns

0.32 0.4 0.48 A

1.2 kΩ

700 ns

Table 7. Overtemperature section

Symbol Parameter Test Conditions Min. Typ. Max. Unit

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

VDD

DRAIN DRAIN DRAIN DRAIN

SO-8 DIP-8

Figure 2. Current and voltage conventions

VDD DRA IN

VIPer12A

CONTROL

SOURCE SOURCE

SOURCE

VDD

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

SOURCE Power MOSFET source and circuit gr ound reference.

DRAIN

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:

capacitor.

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.

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