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VIPER22A中文资料_数据手册_参数

November 2010Doc ID 12050 Rev 21/21

VIPer22A-E

VIPer22ADIP-E, VIPer22AS-E

Low power OFF-line SMPS primary switcher

Features

■Fixed 60 kHz switching frequency ■9 V to 38 V wide range V DD voltage ■Current mode control

■Auxiliary undervoltage lockout with hysteresis ■High voltage start-up current source

■

Overtemperature, overcurrent and overvoltage protection with auto-restart

Description

The VIPer22A-E 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 charger adapters, standby power

supplies for TV or monitors, auxiliary supplies for motor control, etc. The internal control circuit offers the following benefits:

Large input voltage range on the V DD pin 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.

Table 1.

Typical power capability

Mains type

SO-8 DIP-8 European (195 - 265 Vac)

12 W 20 W US / wide range (85 - 265 Vac)

7 W

12 W

DIP-8

SO-8

https://www.wendangku.net/doc/4611110000.html,

Contents VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

Contents

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

1.1Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3Pin connections and function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.1Rectangular U-I output characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.2Wide range of VDD voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.3Feedback pin principle of operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.4Startup sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.5Overvoltage threshold . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5Operation pictures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 6Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 8Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

2/21Doc ID 12050 Rev 2

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Electrical data

Doc ID 12050 Rev 23/21

1 Electrical data

1.1 Maximum ratings

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. 1.2 Thermal data

Table 2.

Absolute maximum rating

Symbol Parameter Value Unit V DS(sw) Switching drain source voltage (T J = 25 ... 125 °C) (1)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 above V DDoff .-0.3 ... 730 V V DS(st) Start-up drain source voltage (T J = 25 ... 125 °C) (2)2.This parameter applies when the start up current source is on. This is the case when the VDD voltage has

not yet reached V DDon or has fallen below V DDoff.

-0.3 ... 400 V I D Continuous drain current Internally limited

A V DD

Supply voltage

0 ... 50 V I FB Feedback current 3 mA V ESD Electrostatic discharge:

Machine model (R = 0 Ω; C = 200 pF) Charged device model 2001.5 V kV T J Junction operating temperature Internally limited °C T C Case operating temperature -40 to 150 °C T stg

Storage temperature

-55 to 150

°C

Table 3.

Thermal data

Symbol Parameter

SO-8DIP-8Unit R thJC Thermal resistance junction - case Max 2515°C/W R thJA

Thermal resistance junction - ambient (1)

1.When mounted on a standard single-sided FR4 board with 200 mm 2 of Cu (at least 35 μm thick) connected

to all DRAIN pins.

Max

°C/W

Electrical characteristics VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

4/21Doc ID 12050 Rev 2

2 Electrical characteristics

T J = 25 °C, V DD = 18 V , unless otherwise specified Table 4.

Power section

Symbol Parameter

Test conditions

Min Typ

Max

Unit BV DSS Drain-source voltage I D = 1 mA; V FB = 2 V 730

I DSS OFF state drain

current

V DS = 500 V; V FB = 2 V; T J = 125 °C

0.1 mA

r DS(on)

Static drain-source ON state resistance

I D = 0.4 A

I D = 0.4 A; T J = 100 °C 15

t f Fall time I D = 0.2 A; V IN = 300 V (1)(See Figure 9 on page 13) 1.On clamped inductive load

100 ns t r Rise time

I D = 0.4 A; V IN = 300 V (1)(See Figure 9 on page 13)

50 ns C OSS Drain

capacitance V DS = 25 V 40

Table 5.Supply section

Symbol Parameter Test conditions Min

Typ

Max

Unit

I DDch

Start-up charging

current

100 V ≤ V DS ≤ 400 V; V DD = 0 V ...V DDon

(See Figure 10 on page 13) -1 mA

I DDoff Start-up charging current in thermal shutdown

V DD = 5 V; V DS = 100 V T J > T SD - T HYST

0 mA

I DD0 Operating supply

current not switching I FB = 2 mA

3 5 mA

I DD1

Operating supply current switching

I FB = 0.5 mA; I D = 50 mA (1)

1.These test conditions obtained with a resistive load are leading to the maximum conduction time of the

device.

4.5 mA

D RST Restart duty-cycle (See Figure 11 on page 13) 16 % V DDoff V DD undervoltage

shutdown threshold (See Figure 10,

Figure 11 on page 13) 7 8 9 V V DDon V DD start-up threshold (See Figure 10,

Figure 11 on page 13)) 13 14.5 16 V V DDhyst V DD threshold hysteresis (See Figure 10 on page 13)

5.8

6.5

7.2 V V DDovp

V DD overvoltage threshold

38 42 46 V

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Electrical characteristics

Doc ID 12050 Rev 25/21

Table 6.Oscillation section

Symbol Parameter Test conditions Min

Typ

Max

Unit

F OSC

Oscillator frequency

total variation

V DD = V DDoff ... 35 V; T J = 0 ... 100 °C

54 60 66 k H z

Table 7.PWM comparator section

Symbol Parameter Test conditions Min

Typ

Max

Unit

G ID I FB to I D current gain (See Figure 12 on page 14) 560 I Dlim Peak current

limitation

V FB = 0 V

(See Figure 12 on page 14)

0.56 0.7 0.84 A

I FBsd I FB shutdown current (See Figure 12 on page 14) 0.9 mA R FB FB pin input impedance

I D = 0 mA

(See Figure 12 on page 14) 1.2 k Ω t d

Current sense delay to turn-OFF

I D = 0.4 A

200 ns t b Blanking time 500

t ONmin

Minimum turn-ON

time

700 ns

Table 8.Overtemperature section

Symbol Parameter Test conditions Min

Typ

Max

Unit T SD Thermal shutdown

temperature (See Figure 13 on page 14) 140 170

°C

T HYST

Thermal shutdown

hysteresis

(See Figure 13 on page 14) 40 °C

Table 9.

Typical power capability (1)

1.Above power capabilities are given under adequate thermal conditions

Mains type

SO-8 DIP-8 European (195 - 265 Vac) 12 W 20 W US / Wide range (85 - 265 Vac)

7 W

12 W

Pin connections and function VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 3 Pin connections and function

6/21Doc ID 12050 Rev 2

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations

Doc ID 12050 Rev 27/21

4 Operations

4.1 Rectangular U-I output characteristics

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

Figure 4. 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.

Operations VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

8/21Doc ID 12050 Rev 2

4.2

Wide range of V DD voltage

The V DD pin voltage range extends from 9 V to 38 V . This feature offers a great flexibility in design to achieve various behaviors. In Figure 4 on page 7 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 V DD pin voltage may vary as much as the input voltage, that is to say with a ratio of about 4 for a wide range application.

4.3 Feedback pin principle of operation

A feedback pin controls the operation of the device. Unlike conventional PWM control

circuits which use a voltage input (the inverted input of an operational amplifier), the FB pin is sensitive to current. Figure 5. presents the internal current mode structure.

Figure 5.

Internal current control structure

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations

Doc ID 12050 Rev 29/21

The Power MOSFET delivers a sense current I s which is proportional to the main current Id. R2 receives this current 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 I S :

Using the current sense ratio of the MOSFET G ID :

The current limitation is obtained with the FB pin shorted to ground (V FB = 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 application, the FB pin is driven with an optocoupler as shown on Figure 5. which

acts 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 drain currents, the formula (1) is valid as long as IFB satisfies I FB < I FBsd , where I FBsd is an internal threshold of the VIPer22A. If I FB exceeds this threshold the device will stop switching. This is represented on Figure 12 on page 14, 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.

R 2I S I FB +()?0.23V

=I S 0.23V

R 2

---------------I FB

–=I D G ID I S ?G ID 0.23V R 2

---------------I FB –??

?==I FB 0.23V R 1

---------------–=I Dlim G ID 0.23V 1R 2------1R 1

------+????

??=

Operations VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

It is then possible to build the total DC transfer function between I D and I FB as shown on

Figure6 on page10. This figure also takes into account the internal blanking time and its

associated minimum turn 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 value of this current versus the fixed 85 mA value, as described above.

10/21Doc ID 12050 Rev 2

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operations

Doc ID 12050 Rev 211/21

4.4 Startup sequence

Figure 7.

Startup sequence

This device includes a high voltage start up current source connected on the drain of the

device. As soon as a voltage is applied on the input of the converter, this start up current source is activated as long as V DD is lower than V DDon . When reaching V DDon , the start up current source is switched OFF and the device begins to operate 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 the regulation point where the secondary loop begins to send a current in the optocoupler. At this point, the converter enters a regulated operation where the FB pin receives the amount of current needed to deliver the right power on secondary side.

This sequence is shown in Figure 7. Note that during the real starting phase t ss , the device consumes some energy from the V DD capacitor, waiting for the auxiliary winding to provide a continuous supply. If the value of this capacitor is too low, the 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.

Operations VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

12/21Doc ID 12050 Rev 2

4.5 Overvoltage threshold

An overvoltage detector on the V DD pin allows the VIPer22A to reset itself when V DD

exceeds V DDovp . This is illustrated in Figure 8. which shows the whole sequence of an overvoltage event. Note that this event is only latched for the time needed by V DD to reach V DDoff , and then the device resumes normal operation automatically.Figure 8.

Overvoltage sequence

V DS

V DDon V DD

V DDoff

V DDovp

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operation pictures

Doc ID 12050 Rev 213/21

5 Operation pictures

Figure 10.Start-up V DD current

V DD

V DDhyst

V DDoff

V DDon

I DD0

I DDch

100 V ≤ V DS ≤ 400 V

F sw = 0 kHz

I DD

Operation pictures VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

14/21Doc ID 12050 Rev 2

Figure 13.Thermal shutdown

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Operation pictures

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Figure 14.Switching frequency vs temperature

Figure 15.Current limitation vs temperature

Package mechanical data VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E 6 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of

ECOPACK? packages, depending on their level of environmental compliance. ECOPACK?

specifications, grade definitions and product status are available at: https://www.wendangku.net/doc/4611110000.html,.

ECOPACK is an ST trademark.

16/21Doc ID 12050 Rev 2

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Package mechanical data

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Figure 16.Package dimensions

Table 11.DIP-8 mechanical data

Dim.

Databook (mm.)

Min.

Nom.

Max.A 5.33

A10.38A2 2.92 3.30 4.95b 0.360.460.56b2 1.14 1.52 1.78c 0.200.250.36D 9.029.2710.16E 7.627.878.26E1 6.10

6.35

7.11

e 2.54eA 7.62

eB 10.92L

2.92

3.30 3.81Package Weight

Gr. 470

Package mechanical data

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

18/21Doc ID 12050 Rev 2

Figure 17.Package dimensions

Table 12.

SO-8 mechanical data

Dim.

Databook (mm.

Min.

Nom.

Max.

A 1.35 1.75 A1 0.10

0.25

A2 1.10 1.65 B 0.33 0.51 C 0.19 0.25 D 4.80 5.00 E 3.80

4.00

e 1.27

H 5.80

6.20 h 0.25 0.50 L 0.40

1.27

k 8° (max.)

ddd 0.1

VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E Order codes

Doc ID 12050 Rev 219/21

7 Order codes

Table 13.

Order codes

Order codes Package Packaging VIPER22ASTR-E SO-8Tape and reel

VIPer22AS-E SO-8T ube VIPer22ADIP-E

DIP-8

T ube

Revision history VIPer22A-E, VIPer22ADIP-E, VIPer22AS-E

20/21Doc ID 12050 Rev 2

8 Revision history

Table 14.

Document revision history

Date Revision

Changes

09-Feb-20061Initial release.25-Nov-2010

Updated T able 11.