SGS Thomson Microelectronics STIL02-P5 Datasheet

STIL02-P5

A.S.D.

Application Specific Discretes

MAIN APPLICATIONS

HIGH POWER DENSITY ADAPTER

■

HIGH END TV POWER SUPPLY

■

OPENED FRAME SMPS

■

FEATURES

Inrush current limitation circuit for off-line power

■

supply Dual non-sensitive unidirectional switches in a

■

single package Suitable when space and efficiency are critical

■

Active after short AC line drop out with a boost

■

converter

■ High repetitive forward and reverse off-state

voltage (700V)

BENEFITS

■ Low consumption (Ipt= 20mA)

■ High noise immunity:

(dV/dt> 500V/µs @ Tj=150°C)

■

Low reverse current losses

■

Integrated pilot driver of the power switches

■

Monolithic ASD™ planar technology for better robustness and reliability

AC inrush current limiter

PENTAWATT HV2

(in line)

PIN OUT DESCRIPTION

Pin out

designation

L AC Line (switch1) 1

Pt1 Pilot of power switch 1 2

OUT Output

Pt2 Pilot of power switch 2 4

N AC Neutral (switch 2) 5

Description Position

(connected to Tab)

Fig. A1: Bloc Diagram.

STIL02-P5

DRIVER

October 2002 - Ed: 3A

Pt 1 Pt 2

OUT

Fig. A2: Basic connection.

STIL02-P5

DRIVER

Pt 1 Pt 2

OUT

Ipt1

Ipt2

Ipt

Aux. Supply

Main converter

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STIL02-P5

Functional Description

The STIL02 isconnectedin parallel with the bridge diode and the inrush power resistor Ri (fig. A2). During start up, the two unidirectional ASD™ power switches of the STIL02 are opened. The inrush current flows through the diodes of the bridge and the external inrush power resistor Ri. Since the main converter turns ON, the auxiliary power supply coupled with the main transformer, supplies the energy required to close the two power switches of theSTIL02. At the normal state,the twobottom diodes of the bridgerectifier and the two unidirectional switches of the STIL02 rectify the AC line current.

When the STIL02 isused with a PFC boostconverter, the inrush current circuitremains active after a short ACline dropout(see fig.A5). Inthat configuration, since the AC line disappears,the PFCcontroller andthe auxiliary power supply of the STIL turns OFF. The two switches of the STIL are opened. The output bulk capacitorCb isdischarging and itis providingthe energy tothe mainconverter.When theAC line recovers, the two switches remain opened and recharging inrush current of the capacitor Cb is deviated and limited throughthe resistorRi. Whenthe capacitor ischarged, thePFC turnsON again and the twoswitches ofthe STIL switch ON.

More details on the design and operation of the driver circuit of figure A5 can be found in the application note “AN1600 - STIL: Inrush Current Limitation Device for Off-Line Power Converter”.

ABSOLUTE MAXIMUM RATINGS (Limiting value)

Symbol Parameter Value Unit

Dout

Rout

out(AV)

Repetitive forward (V off-state voltage

Average on state current at the OUT terminal

) and reverse (V

Dout

Rout

)

Tj Tj

(min) (max)

Tj = 150°C

700 V

2A (180° conduction angle for the internal power switches)

out(RMS)

RMS on state current at the OUT terminal

Tj = 150°C

2.2 A (180° conduction angle for the internal power switches)

TSM

out

Tstg

Non repetitive surge peak on-state current (Tj initial = 25°C)

t value - rating for fusing tp = 10ms

Critical rate of rise of on state current

/dt

Ipt1 + Ipt2 = 20mA Storage temperature range Junction temperature range

tp = 10ms sinusoidal

Tj = 25°C Tj = 150°C

65 A

21 A

100

A/µs

-40 to +150 °C 0 to +150 °C

THERMAL PARAMETERS

Symbol Parameter Value Unit

Rth Rth

(j-c)

(j-a)

Junction to case Junction to ambient (minimum footprint)

2 °C/W

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STIL02-P5

ELECTRICAL CHARACTERISTICS

Symbol Parameter Test conditions Min. Typ. Max. Unit

V V

Rout

Ipt1

Ipt2

(pt1)

(pt2)

(pt1)

(pt2)

Dout

Vt0

/dt

(off)

(on)

Driver trigger current V

Direct pilot trigger voltage V

= 12V (DC)

Dout

=30Ω

tp = 380µs

= 12V (DC)

Dout

=30Ω

Tj = 0°C Tj = 25°C

Tj = 0°C Tj = 25°C Tj = 150°C

Peak reverse driver voltage Tj = 25°C

Dynamic voltage rising Linear slope up to

= 470V

Dout

Max reverse current without driver current

= 700V

Rout

Ipt1 = Ipt2 = open

Tj = 150°C

Tj = 25°C Tj = 150°C

Max reverse current with driver current

Threshold direct voltage for

= 400V

Rout

Ipt1 = Ipt2 = 10mA I

= 2A Tj = 150°C

out(AV)

Tj = 150°C

one power switch Dynamic direct resistance for

= 2A Tj = 150°C

out(AV)

one power switch Maximum instantaneous di-

out(AV)

= 2A Tj = 150°C rect forward voltage drop for one power switch

12 20 mA 10

0.6 0.85 1 V

0.8 0.95

0.2 0.45 8V

500 V/µs

5µA 300 µA 300 µA

0.7 0.8 V

70 100 mΩ

0.9 1.1 V

Power losses calculations

When the input current is sinusoidal, the conducted power losses can be calculated by using the following formula:

PVI R

T out av d

()

(

out av

()

)

If the output average current is 2Amps, VT0and Rd of the electrical characteristics table can be used. For differentoutput current pleaserefer tothe application noteAN1600 thatprovides guidelines toestimate the correct values of VT0and Rd.

LIGHTNING SURGE IMMUNITY (IEC61000-4-5)

During lightning surge transient voltage across the AC line, over current and over voltage stress are appliedon allthe components of the powersupply. TheSTIL02 can sustain a maximumpeak surgecurrent of

500Aas defined by the combinewaveform generator (8/20µswaveform as shownin fig. A3 and A4). Special recommendations for the lightning surge immunity:

1 - Check that the maximum peak surge current in the STIL stays below the limit specified above. 2 - Check that no over voltages are applied on the STIL and the bridge diode. 3 - In order to reduce the dynamic current stress (dI

/dt) through the structure of the STIL02, it is recom-

out

mended to connect a differential mode choke coil in front of the STIL and the bridge diode.

More details and design guidelines are provided in the application note “AN1600 - STIL: Inrush Current Limitation Device for Off-Line Power Converter”.

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