ST VIPer53 - E User Manual

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General features

Type

European

(195 - 265Vac)

DIP-8 50W 30W

PowerSO-10

TM

65W 40W

US / Wide range

(85 - 265 Vac)

Features

■ Switching frequency up to 300kHz

■ Current limitation

■ Current mode control with adjustable limitation

■ Soft start and shut-down control

■ Automatic burst mode in standby condition

(“Blue Angel“ compliant )

■ Undervoltage lockout with Hysteresis

■ HIgh voltage star-tup current source

■ Overtemperature protection

■ Overload and short-circuit control

Block diagram

VIPer53 - E

OFF-line primary switch

DIP-8PowerSO-10

Description

The VIPer53-E combines an enhanced current mode PWM controller with a high voltage MDMesh Power Mosfet in the same package. Typical applications cover offline power supplies with a secondary power capability ranging up to 30W in wide range input voltage, or 50W in single European voltage range and DIP-8 package, with the following benefits:

■ Overload and short circuit controlled by

feedback monitoring and delayed device reset.

■ Efficient standby mode by enhanced pulse

skipping.

■ Primary regulation or secondary loop failure

protection through high gain error amplifier.

OSC DRAIN

ON/OFF

OSCILLATOR

PWM

VDD

8.4/

11.5V

15V

18V

UVLO

COMPARATO R

ERROR

AMPLIF IER

OVERVOLTAGE

COMPARATO R

0.5V

4.35V

OVERTEMP.

DETECTOR

STANDBY

COMPARAT OR

OVERLOAD

COMPARAT OR

LATCH

S

R1

FF

R2

R3 R4 R5

Q

BLANKING TIM E

SELECTION

150/400ns

BLANKING

4V

4.5V

PWM

COMPARATOR

8V

125k

TOVL COMP SOURCE

1V

0.5V

H

COMP

CURRENT

AMPLIF IER

November 2006 Rev 1 1/36

www.st.com

36

Contents VIPer53 - 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 Operation pictures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Primary regulation configuration example . . . . . . . . . . . . . . . . . . . . . . 15

6 Secondary feedback configuration example . . . . . . . . . . . . . . . . . . . . 17

7 Current mode topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

8 Standby mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

9 High voltage Start-up current source . . . . . . . . . . . . . . . . . . . . . . . . . . 22

10 Short-circuit and overload protection . . . . . . . . . . . . . . . . . . . . . . . . . . 24

11 Transconductance error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

12 Special recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

13 Software implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

14 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

15 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

16 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

2/36

VIPer53 - 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

I

V

OSC

I

COMP

I

TOVL

Continuous drain source voltage (TJ= 25 ... 125°C)

DS

Continuous drain current Internally limited A

D

Supply voltage 0 ... 19 V

DD

OSC input voltage range

COMP and TOVL input current range

Electrostatic discharge:

V

ESD

Machine model (R = 0Ω; C = 200pF) Charged device model

T

STG

1. In order to improve the ruggedness of the device versus eventual drain overvoltages, a resistance of 1kΩ

should be inserted in series with the TOVL pin.\

Junction operating temperature Internally limited °C

J

Case operating temperature -40 to 150 °C

C

Storage temperature -55 to 150 °C

1.2 Thermal data

Table 2. Thermal data

Symbol Parameter

(1)

PowerSO-10

-0.3 ... 620 V

0 ... V

DD

-2 ... 2 mA

200

1.5

(1)

DIP-8

(2)

V

kV

Unit

R

1. When mounted on a standard single-sided FR4 board with 50mm² of Cu (at least 35 mm thick) connected to the DRAIN pin.

2. When mounted on a standard single-sided FR4 board with 50mm² of Cu (at least 35 mm thick) connected to the device tab.

Thermal Resistance Junction-case Max 2 20 °C/W

thJC

Thermal Resistance Ambient-case Max 60 80 °C/W

thJA

3/36

Electrical characteristics VIPer53 - E

2 Electrical characteristics

TJ = 25°C, V

= 13V, unless otherwise specified

DD

Table 3. Power section

Symbol Parameter Test conditions Min. Typ. Max. Unit

BV

I

DSS

R

DS(on)

C

1. On clamped inductive load

2. This parameter can be used to compute the energy dissipated at turn on E to source voltage V

Drain-source voltage

DSS

Off state drain current

Static drain-source On state resistance

t

Fall time

fv

t

Rise time

rv

Drain capacitance

oss

Effective output

Eon

capacitance

and the following formula:

DSon

= 1mA; V

I

D

V

= 500V; V

DS

TJ = 125°C

ID = 1A; V

= 25°C

T

J

T

= 100°C

J

ID = 0.2A; V

ID = 1A; V

= 25V

V

DS

200V < V

E

ton

COMP

= 0V

COMP

= 4.5V; V

= 0V;

TOVL

= 0V

620 V

150 µA

0.9 1

1.7ΩΩ

IN

= 300V

IN

= 300V

(1)

100 ns

50 ns

170 pF

300

(2)

V

2

DSon

⎛⎞

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

⎝⎠

300

according to the initial drain

ton

1.5

< 400V

DSon

1

-- -

C

⋅⋅⋅=

Eon

2

60 pF

Table 4. Oscillator section

Symbol Parameter Test conditions Min. Typ. Max. Unit

R

F

OSC1

F

OSC2

V

OSChi

V

OSClo

Oscillator frequency initial accuracy

Oscillator frequency total variation

Oscillator peak voltage

Oscillator valley voltage

4/36

= 8kΩ; CT = 2.2nF

T

Figure 12 on page 12

= 8kΩ; CT = 2.2nF

R

T

Figure 16 on page 14

= V

V

DD

DDon

T

= 0 ... 100°C

J

... V

DDovp

95 100 105 kHz

;

93 100 107 kHz

9V

4V

VIPer53 - E Electrical characteristics

Table 5. Supply section

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

DSstart

I

DDch1

I

DDch2

I

DDchoff

I

DD0

I

DD1

V

DDoff

V

DDonVDD

V

DDhystVDD

V

DDovp

Drain voltage starting threshold

Startup charging current

Startup charging current in thermal shutdown

Operating supply current not switching

Operating supply current switching

V

undervoltage

DD

shutdown threshold

startup threshold

threshold hysteresis

V

Overvoltage

DD

shutdown threshold

Table 6. Error amplifier section

V

= 5V; I

DD

V

= 0 ... 5V; V

DD

Figure 5 on page 10

= 10V; V

V

DD

V

= 5V; V

DD

> TSD - T

T

J

= 0kHz; V

F

sw

= 100kHz

F

sw

= 0mA

DD

= 100V

DS

= 100VFigure 5.

DS

= 100VFigure 7.

DS

HYST

= 0V

COMP

34 50 V

-12 mA

-2 mA

0mA

811mA

9mA

Figure 5 on page 10 7.5 8.4 9.3 V

Figure 5. 10.2 11.5 12.8 V

Figure 5. 2.6 3.1 V

Figure 5. 17 18 19 V

Symbol Parameter Test conditions Min. Typ. Max. Unit

= 0mA

I

V

DDregVDD

∆V

DDreg

G

BW

AV

OL

G

m

V

COMPlo

V

COMPhi

I

COMPlo

I

COMPhi

1. In order to insure a correct stability of the error amplifier, a capacitor of 10nF (minimum value: 8nF) should always be present on the COMP pin.

regulation point

VDD regulation point total variation

Unity gain bandwidth

Voltage gain I

DC transconductance V

Output low level I

Output high level I

Output sinking current

Output sourcing current

COMP

Figure 11. on page 11

I

= 0mA; TJ = 0 ... 100°C 2 %

COMP

From Input = V V

COMP

I

= 0mA Figure 14 and 15

COMP

= 0mA Figure 14 and 15 40 45 dB

COMP

= 2.5V Figure 11. 11.41.8mS

COMP

= -0.4mA; V

COMP

= 0.4mA; VDD=14V

COMP

= 2.5V; V

V

COMP

to Output =

DD

= 16V 0.2 V

DD

(1)

= 16V

DD

Figure 11. on page 11

= 2.5V; VDD= 14V

V

COMP

Figure 11.

14.5 15 15.5 V

700 kHz

4.5 V

-0.6 mA

0.6 mA

5/36

Electrical characteristics VIPer53 - E

Table 7. PWM comparator section

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

= 1 ... 4 V Figure 10.

H

COMP

V

COMPosVCOMP

I

Dlim

I

Dmax

V

COMPbl

t

ONmin1

t

ONmin2

V

COMPoff

∆V

Peak drain current limitation

Drain current capability

Current sense delay to

t

d

Turn-Off

V

COMP

change threshold

Blanking time V

b1

Blanking time V

b2

Minimum On time V

V

COMP

Threshold

/ ∆I

COMP

Offset

blanking time

Shutdown

DPEAK

COMP

/dt = 0 1.7 2 2.3 V/A

dI

D

dI

/dt = 0 Figure 10. on page 11 0.5 V

D

I

= 0mA; V

COMP

Figure 10.

/dt = 0

dI

D

= V

V

COMP

/dt = 0 1.6 1.9 2.3 A

dI

D

= 1A 250 ns

I

D

COMPovl

TOVL

; V

= 0V

TOVL

1.7 2 2.3 A

Figure 6 on page 10 1V

COMP

< V

> V

< V

> V

COMPBL

Figure 6. 300 400 500 ns

Figure 6. 100 150 200 ns

450 600 750 ns

250 350 450 ns

Figure 9 on page 11 0.5 V

Table 8. Overload protection section

Symbol Parameter Test conditions Min. Typ. Max. Unit

V

COMPovl

V

1. V

DIFFovl

OVLth

t

OVL

COMPovl

V

overload

COMP

threshold

V

COMPhi

to V

COMPovl

voltage difference

V

overload

TOVL

threshold

Overload delay

is always lower than V

I

TOVL

Figure 4 on page 9

I

TOVL

= 0mA

= V

V

DD

Figure 4.

Figure 4. 4V

C

OVL

COMPhi

(1)

= 0mA

... V

DDoff

(1)

DDreg

= 100nF Figure 4.

4.35 V

;

50 150 250 mV

8ms

Table 9. Over temperature Protection Section

Symbol Parameter Test Conditions Min. Typ. Max. Unit

T

HYST

Thermal shutdown

SD

temperature

Thermal shutdown hysteresis

Figure 7 on page 10 140 160 °C

Figure 7 on page 10 40 °C

6/36

VIPer53 - E Pin connections and function

V

S

3 Pin connections and function

Figure 1. Pin connection (top view)

OSC

SOURCE

1

2

3

8

7

6

54

TOVLCOMP

VDD

NC

DRAIN

DIP-8 PowerSO-10

Figure 2. Current and voltage conventions

I

DD

VDD

I

OSC

15V

DD

I

V

OSC

TOVL

V

TOVL

I

COMP

SOURCECOMPTOVL

DRAIN

I

D

V

D

V

COMP

7/36

Pin connections and function VIPer53 - E

Table 10. Pin function

Pin Name Pin function

Power supply of the control circuits. Also provides the charging current of the external capacitor during start-up. The functions of this pin are managed by four threshold voltages:

V

DD

SOURCE Power MOSFET source and circuit ground reference.

DRAIN

COMP

TOVL

- VDDon: Voltage value at which the device starts switching (Typically 11.5 V).

- VDDoff: Voltage value at which the device stops switching (Typically 8.4 V).

- VDDreg: Regulation voltage point when working in primary feedback (Trimmed to 15 V).

- VDDovp: Triggering voltage of the overvoltage protection (Trimmed to 18 V).

Power MOSFET drain. Also used by the internal high voltage current source during the start-up phase to charge the external V

capacitor.

DD

Input of the current mode structure, and output of the internal error amplifier. Allows the setting of thedynamic characteristic of the converter through an external passive network. The useful voltage range extends from 0.5V to 4.5V. The Power MOSFET is always off below 0.5V, and the overload protection is triggered if the voltage exceeds

4.35V. This action is delayed by the timing capacitor connected tothe TOVL pin.

Allows the connection of an external capacitor for delaying the overload protection, which is triggered by a voltage on the COMP pin higher than 4.35V.

OSC Allows the setting of the switching frequency through an external Rt-Ct network.

8/36

VIPer53 - E Operation pictures

V

4 Operation pictures

Figure 3. Rise and fall time

I

D

C<<C

OSS

CLD

t

V

DS

90%

t

fv

10%

Figure 4. Overloaded event

V

DD

V

DDon

V

DDoff

V

COMP

t

rv

Normal

operation

VDD

OSC

15V

DRAIN

300

SOURCECOMPTOVL

t

Abnormal operation

V

DIFFovl

V

TOVL

V

OVLth

t

OVL

V

DS

Switching

Not

switching

9/36

Operation pictures VIPer53 - E

Figure 5. Start-up V

I

DD

I

DDch2

I

DDch1

DD0

V

DDhyst

V

DDoff

current Figure 6. Blanking time

DD

t

b

t

b1

V

DDon

VDS = 100 V

F

= 0 kHz

SW

DD

t

b2

V

COMPbl

Figure 7. Thermal shutdown Figure 8. Overvoltage event

V

DDovp

DD

TSD-T

T

HYST

j

SD

V

COMPhi

V

DD

V

DDon

COMP

Automatic

startup

V

COMP

V

DS

Abnormal operation

Switching

Not

switching

10/36

VIPer53 - E Operation pictures

Figure 9. Shutdown action Figure 10. Comp pin gain and offset

V

OSC

V

OSChi

V

OSClo

t

I

Dpeak

V

COMP

V

COMPoff

I

D

Figure 11. Output characteristics

I

COMP

I

COMPhi

Slope = Gm

V

0

DDreg

I

Dlim

I

Dmax

Slope = 1 / H

COMP

t

V

COMP

V

COMPos

V

COMPovl

V

COMPhi

t

V

DD

I

COMPlo

11/36